section 00001 forsyth county schools …. ashrae std 90.1 energy standard for buildings except -...

MASHBURN ELEMENTARY SCHOOL ENERGY RECOVERY UNIT DESIGN March 2, 2017

Griffith Engineering, Inc - 13102 00001 - 1 FORSYTH COUNTY SCHOOLS

SECTION 00001

FORSYTH COUNTY SCHOOLS

ENERGY RECOVERY UNIT AND VRF SYSTEM DESIGN

MASHBURN ELEMENTARY SCHOOL

END OF PROJECT TITLE PAGE


Griffith Engineering, Inc - 13102 00100 - 1 BID SOLICITATION

SECTION 00100

BID SOLICITATION

FROM:

1.01 The Owner (hereinafter referred to as Forsyth County Schools):

A. Forsyth County Schools

B. 1120 Dahlonega Highway

C. Cumming, GA 30040

1.02 And the Engineer (hereinafter referred to as Griffith Engineering, Inc.):

A. Griffith Engineering, Inc.

B. 4360 Chamblee Dunwoody Road

C. Suite 210

D. Atlanta, GA 30341

1.03 DATE: March 6, 2017

1.04 Pre-Bid Meeting/Walkthrough: March 20, 2017 at 3:00 pm

1.05 TO: POTENTIAL BIDDERS

A. Your firm is invited to submit an offer under seal to Forsyth County Schools for renovation of building HVAC systems located at the above address before 10:00 am local standard time on the 10th day of April 2017, for the following project: MASHBURN ELEMENTARY SCHOOL ENERGY RECOVERY UNIT AND VRF SYSTEM DESIGN.

B. Bidders will be required to provide Bid security in the form of a Bid Bond of a sum no less than 5 percent of the Bid Amount.

C. Your offer will be required to be submitted under a condition of irrevocability for a period of 60 days after submission.

D. The Owner reserves the right to accept or reject any or all offers.

1.06 SIGNATURE

A. For: ................

B.

C. By: ...................

D. 1. Signed: _______________________________ 2. (Authorized signing officer)

END OF BID SOLICITATION


Griffith Engineering, Inc - 13102 00410 - 1 BID FORM

SECTION 00410

BID FORM

THE PROJECT AND THE PARTIES

1.01 TO:

A. Forsyth County Schools

B. 1120 Dahlonega Highway

C. Cumming, GA 30040

1.02 FOR:

A. HVAC Renovations

1.03 DATE: ______________ (Bidder to enter date)

1.04 SUBMITTED BY: (Bidder to enter name and address)

A. Bidder's Full Name _________________________ 1. Address _________________________ 2. City, State, Zip_________________________

1.05 OFFER

A. Having examined the Place of The Work and all matters referred to in the Instructions to Bidders and the Contract Documents prepared by Griffith Engineering, Inc for the above mentioned project, we, the undersigned, hereby offer to enter into a Contract to perform the Work for the Unit Prices listed in this bid form.

B. All applicable federal taxes are included and State of Georgia taxes are included in the Bid Sum.

1.06 ACCEPTANCE

A. This offer shall be open to acceptance and is irrevocable for sixty days from the bid closing date.

B. If this bid is accepted by Forsyth County Schools within the time period stated above, we will: 1. Execute the Agreement within seven days of receipt of Notice of Award. 2. Furnish the required bonds within seven days of receipt of Notice of Award. 3. Commence work within seven days after written Notice to Proceed of this bid.

C. If this bid is accepted within the time stated, and we fail to commence the Work or we fail to provide the required Bond(s), the security deposit shall be forfeited as damages to Forsyth County Schools by reason of our failure, limited in amount to the lesser of the face value of the security deposit or the difference between this bid and the bid upon which a Contract is signed.

1.07 CONTRACT TIME

A. If this Bid is accepted, we will begin submittal process and work as soon as possible. The submittal process should be complete and equipment ordered and on site for work to begin on June 1, 2017.

B. Substantial completion of the Work by the 16th day of July, 2017.

1.08 UNIT PRICES

A. The following are Unit Prices for specific portions of the Work as listed. The following is the list of Unit Prices:

B. ITEM DESCRIPTION - ITEM VALUE


Griffith Engineering, Inc - 13102 00410 - 2 BID FORM

C. Mashburn Elementary School Base Project $

1.09 CHANGES TO THE WORK

A. When Engineer establishes that the method of valuation for Changes in the Work will be net cost plus a percentage fee in accordance with General Conditions, our percentage fee will be: 1. 15 percent overhead and profit on the net cost of our own Work; 2. 15 percent on the cost of work done by any Subcontractor.

B. On work deleted from the Contract, our credit to Forsyth County Schools shall be Engineer-approved net cost plus 0 of the overhead and profit percentage noted above.

1.10 ADDENDA

A. The following Addenda have been received. The modifications to the Bid Documents noted below have been considered and all costs are included in the Bid Sum. 1. Addendum # _______ Dated ________________. 2. Addendum # _______ Dated ________________.

1.11 BID FORM SUPPLEMENTS

A. The following information is included with Bid submission: 1. The Contractor shall provide a bid bond in the amount of 5% of the total project.

1.12 BID FORM SIGNATURE(S)

A. The Corporate Seal of

B. ____________________________________________

C. (Bidder - print the full name of your firm)

D. was hereunto affixed in the presence of:

E. ____________________________________________

F. (Authorized signing officer, Title)

G. (Seal)

H. ____________________________________________

I. (Authorized signing officer, Title)

END OF BID FORM


Griffith Engineering, Inc - 13102 00700 - 1 GENERAL CONDITIONS

SECTION 00700

GENERAL CONDITIONS

FORM OF GENERAL CONDITIONS

1.01 AIA Document A201, General Conditions of the Contract for Construction, 1997 Edition, attached, is the General Conditions between the Owner and Contractor.

SUPPLEMENTARY CONDITIONS

2.01 Refer to Document 00800 for amendments to these General Conditions.

END OF DOCUMENT


Griffith Engineering, Inc - 13102 00800 - 1 SUPPLEMENTARY CONDITIONS

SECTION 00800

SUPPLEMENTARY CONDITIONS

INTENT

1.01 These Supplementary Conditions amend and supplement the General Conditions defined in Document 00700 and other provisions of the Contract Documents as indicated below. All provisions which are not so amended or supplemented remain in full force and effect.

1.02 The terms used in these Supplementary Conditions which are defined in the General Conditions have the meanings assigned to them in the General Conditions.

MODIFICATIONS TO AIA A201

2.01 ARTICLE 8 - TIME

A. Add the following subparagraph: 1. 8.1.5: Contract Time commences on Notice to Proceed and continues to July 31, 2017.

ADDITIONAL ARTICLE _____ - DEFINITIONS

3.01 Products: Means new material, machinery, components, equipment, fixtures, and systems forming the Work, but does not include machinery and equipment used for preparation, fabrication, conveying and erection of the Work. Products may also include existing materials or components required for reuse.

3.02 Furnish or Supply: To supply and deliver, unload, inspect for damage.

3.03 Install: To unpack, assemble, erect, apply, place, finish, cure, protect, clean, and ready for use.

3.04 Provide: To furnish or supply, plus install.

3.05 Project Manual: The Project Manual is the volume usually assembled for the Work which includes the Bid Documents, Contract Documents, and Specifications.

END OF DOCUMENT 00800


Griffith Engineering, Inc - 13102 23 81 29 - 1 VARIABLE REFRIGERANT VOLUME (VRV) HVAC SYSTEM

SECTION 238129

VARIABLE REFRIGERANT VOLUME (VRV) HVAC SYSTEM

PART 1 - GENERAL

1.1 SECTION INCLUDES

A. Variable refrigerant volume HVAC system includes:

1. Outdoor/Condensing unit(s). 2. Indoor/Evaporator units. 3. Branch selector units. 4. Refrigerant piping. 5. Control panels. 6. Control wiring.

1.2 REFERENCE STANDARDS

A. AHRI 210/240 - Standard for Performance Rating of Unitary Air-Conditioning and Air-Source Heat Pump Equipment; Air-Conditioning, Heating, and Refrigeration Institute; 2008.

B. ASHRAE Std 90.1 - Energy Standard for Buildings Except Low-Rise Residential Buildings; American Society of Heating, Refrigerating, and Air-Conditioning Engineers, Inc; 2007, Including All Addenda (ANSI/ASHRAE/IESNA Std 90.1).

C. NFPA 70 - National Electrical Code; National Fire Protection Association; Most Recent Edition Adopted by Authority Having Jurisdiction, Including All Applicable Amendments and Supplements.

D. UL 1995 - Heating and Cooling Equipment; Current Edition, Including All Revisions.

1.3 SUBMITTALS

A. Product Data: Submit manufacturer's standard data sheets showing the following for each item of equipment, marked to correlate to equipment item markings shown in the contract documents:

1. Outdoor/Central Units: a. Refrigerant Type and Size of Charge. b. Cooling Capacity: Btu/h. c. Heating Capacity: Btu/h. d. Cooling Input Power: Btu/h. e. Heating Input Power: Btu/h. f. Operating Temperature Range, Cooling and Heating. g. Air Flow: Cubic feet per minute. h. Fan Curves. i. External Static Pressure (ESP): Inches WG. j. Sound Pressure Level: dB(A). k. Electrical Data:

1) Maximum Circuit Amps (MCA).



2) Maximum Fuse Amps (MFA). 3) Maximum Starting Current (MSC). 4) Full Load Amps (FLA). 5) Total Over Current Amps (TOCA). 6) Fan Motor: HP.

l. Weight and Dimensions. m. Maximum number of indoor units that can be served. n. Maximum refrigerant piping run from outdoor/condenser unit to indoor/evaporator

unit. o. Maximum height difference between outdoor/condenser unit to indoor/evaporator

unit, both above and below. p. Control Options.

2. Indoor/Evaporator Units: a. Cooling Capacity: Btu/h. b. Heating Capacity: Btu/h. c. Cooling Input Power: Btu/h. d. Heating Input Power: Btu/h. e. Air Flow: Cubic feet per minute. f. Fan Curves. g. External Static Pressure (ESP): Inches WG. h. Sound Pressure level: dB(A). i. Electrical Data:

1) Maximum Circuit Amps (MCA). 2) Maximum Fuse Amps (MFA). 3) Maximum Starting Current (MSC). 4) Full Load Amps (FLA). 5) Total Over Current Amps (TOCA). 6) Fan Motor: HP.

j. Maximum Lift of Built-in Condensate Pump. k. Weight and Dimensions. l. Control Options.

3. Control Panels: Complete description of options, control points, zones/groups.

B. Shop Drawings: Installation drawings custom-made for this project; include as-designed HVAC layouts, locations of equipment items, refrigerant piping sizes and locations, condensate piping sizes and locations, remote sensing devices, control components, electrical connections, control wiring connections. Include: 1. Detailed piping diagrams, with branch balancing devices. 2. Condensate piping routing, size, and pump connections. 3. Detailed power wiring diagrams. 4. Detailed control wiring diagrams. 5. Locations of required access through. 6. Drawing required by manufacturer.

1.4 DELIVERY, STORAGE AND HANDLING

A. Deliver, store, and handle equipment and refrigerant piping according to manufacturer's recommendations.



PART 2 - PRODUCTS

2.1 MANUFACTURERS

A. Basis of Design: The system design shown in the contract documents is based on equipment and system designed by Mitsubishi. Approved alternate VRV/VRF system by Daikin, VRV IV Heat Recovery or Trane/Samsung may also be utilized, provided all requirements are met.

2.2 HVAC SYSTEM DESIGN

A. System Operation: Heating and cooling, simultaneously. 1. Zoning: Provide capability for temperature control for each individual indoor/evaporator

unit independently of all other units. 2. Zoning: Provide heating/cooling selection for each individual indoor/evaporator unit

independently of all other units. 3. Provide a complete functional system that achieves the specified performance based on

the specified design conditions and that is designed and constructed according to the equipment manufacturer's requirements.

4. Conditioned spaces are shown on the drawings. 5. Branch controller unit locations are shown on the drawings. 6. Required equipment unit capacities are shown on the drawings. 7. Refrigerant piping sizes are not shown on the drawings. 8. Connect equipment to condensate piping provided by others; condensate piping is not

shown on the drawings.

B. Cooling Mode Interior Performance: 1. Daytime Setpoint: 74 degrees F, plus or minus 1 degrees F. 2. Setpoint Range: 57 degrees F to 77 degrees F. 3. Night Setback: 78 degrees F. 4. Interior Relative Humidity: 60 percent, maximum.

C. Heating Mode Interior Performance: 1. Daytime Setpoint: 70 degrees F, plus or minus 1 degrees F. 2. Setpoint Range: 59 degrees F to 80 degrees F. 3. Night Setback: 60 degrees F. 4. Interior Relative Humidity: 20 percent, minimum.

D. Outside Air Design Conditions: 1. Summer Outside Air Design Temperature: 93 degrees F dry-bulb; 75 degrees F wet-bulb. 2. Winter Outside Air Design Temperature: 17 degrees F dry-bulb.

E. Operating Temperature Ranges: 1. Simultaneous Heating and Cooling Operating Range: minus 4 degrees F to 60 degrees F

dry bulb. 2. Cooling Mode Operating Range: minus 4 degrees F to 110 degrees F dry bulb. 3. Heating Mode Operating Range: 0 degrees F to 77 degrees F dry bulb; minus 4 degrees

F to 60 degrees F wet bulb; without low ambient controls or auxiliary heat source.

F. Refrigerant Piping Lengths: Provide equipment capable of serving system. As required, based on layout. Provide traps as required by manufacturer and in accordance with manufacturer’s recommendations.

G. Control Wiring Lengths as required, based on layout.



H. Controls: Provide the following control interfaces: 1. One central remote control panel for entire system; locate where indicated. 2. Native BACnet Interface Module capable of interfacing with customer BMS

I. Local Controllers: Wall-mounted, wired, containing temperature sensor.

2.3 EQUIPMENT

A. All Units: Factory assembled, wired, and piped and factory tested for function and safety. 1. Refrigerant: R-410A. 2. Performance Certification: AHRI Certified; www.ahrinet.org. 3. Safety Certification: Tested to UL 1995 by UL or Intertek-ETL and bearing the certification

label. 4. Provide outdoor/condensing units capable of serving indoor unit capacity up to 200

percent of the capacity of the outdoor/condensing unit. 5. Provide units capable of serving the zones indicated. 6. Thermal Performance: Provide heating and cooling capacity as indicated on drawings. 7. Energy Efficiency: Report EER and COP based on tests conducted at “full load” in

accordance with AHRI 210/240 or alternate test method approved by U.S. Department of Energy.

B. Electrical Characteristics: 1. Refer to plans for requirements

2.4 OUTDOOR/CONDENSING UNITS

A. Outdoor/Condensing Units: Air-cooled DX refrigeration units, designed specifically for use with indoor/evaporator units; factory assembled and wired with all necessary electronic and refrigerant controls; modular design for ganging multiple units. 1. Refrigeration Circuit: Scroll compressors, motors, fans, condenser coil, electronic

expansion valves, solenoid valves, 4-way valve, distribution headers, capillaries, filters, shut off valves, oil separators, service ports and refrigerant regulator.

2. Refrigerant: Factory charged. 3. Variable Volume Control: Modulate compressor capacity automatically to maintain

constant suction and condensing pressures while varying refrigerant volume to suit heating/cooling loads.

4. Capable of being installed with wiring and piping to the left, right, rear or bottom. 5. Capable of heating operation at low end of operating range as specified, without

additional low ambient controls or auxiliary heat source; during heating operation, reverse cycle (cooling mode) oil return or defrost is not permitted, due to potential reduction in space temperature.

6. Sound Pressure Level: As specified, measured at 3 feet from front of unit; provide night setback sound control as a standard feature; three selectable sound level steps of 55 dB, 50 dB, and 45 dB, maximum.

7. Power Failure Mode: Automatically restart operation after power failure without loss of programmed settings.

8. Provide refrigerant auto-charging feature and refrigerant charge check function. 9. Safety Devices: High pressure sensor and switch, low pressure sensor/switch, control

circuit fuses, crankcase heaters, fusible plug, overload relay, inverter overload protector, thermal protectors for compressor and fan motors, over current protection for the inverter and anti-recycling timers.

10. Provide refrigerant sub-cooling to ensure the liquid refrigerant does not flash when supplying to us indoor units.



11. Oil Recovery Cycle: Automatic, occurring 2 hours after start of operation and then every 8 hours of operation; maintain continuous heating during oil return operation.

12. Controls: Provide contacts for electrical demand shedding.

B. Unit Cabinet: Weatherproof and corrosion resistant; rust-proofed mild steel panels coated with baked enamel finish. 1. Designed to allow side-by-side installation with minimum spacing.

C. Fans: One or more direct-drive propeller type, vertical discharge, with multiple speed operation via DC (digitally commutating) inverter. 1. Provide minimum of 2 fans for each condensing unit. 2. External Static Pressure: Factory set at 0.12 in WG, minimum. 3. Indoor Mounted Air-Cooled Units: External static pressure field set at 0.32 in WG,

minimum; provide for mounting of field-installed ducts. 4. Fan Airflow: As indicated for specific equipment. 5. Fan Motors: Factory installed; permanently lubricated bearings; inherent protection; fan

guard; output as indicated for specific equipment.

D. Condenser Coils: Copper tubes expanded into aluminum fins to form mechanical bond; waffle louver fin and rifled bore tube design to ensure high efficiency performance.

E. Hail Wind Baffles

F. E. Compressors: Scroll type, hermetically sealed, variable speed inverter-driven and fixed speed in combination to suit total capacity; minimum of one variable speed, inverter driven compressor per condenser unit; minimum of two compressors per condenser unit; capable of controlling capacity within range of 6 percent to 100 percent of total capacity. 1. Multiple Condenser Modules: Balance total operation hours of compressors by means of

duty cycling function, providing for sequential starting of each module at each start/stop cycle, completion of oil return, and completion of defrost, or every 8 hours.

2. Failure Mode: In the event of compressor failure, operate remaining compressor(s) at proportionally reduced capacity; provide microprocessor and associated controls specifically designed to address this condition.

3. Provide each compressor with crankcase heater, high pressure safety switch, and internal thermal overload protector.

4. Provide oil separators and intelligent oil management system. 5. Provide spring mounted vibration isolators.

2.5 BRANCH CIRCUIT (BC) CONTROLLERS

A. GeneraL

The BC (Branch Circuit) Controllers shall include multiple branches to allow simultaneous heating and cooling by allowing either hot gas refrigerant to flow to indoor unit(s) for heating or subcooled liquid refrigerant to flow to indoor unit(s) for cooling. Refrigerant used for cool-ing must always be subcooled for optimal indoor unit LEV performance; alternate branch de-vices with no subcooling risk bubbles in liquid supplied to LEV and are not allowed.

The BC (Branch Circuit) Controllers shall be specifically used with R410A R2-Series systems. These units shall be equipped with a circuit board that interfaces to the M-NET controls sys-tem and shall perform all functions necessary for operation. The unit shall have a galvanized steel finish. The BC Controller shall be completely factory assembled, piped and wired. Each unit shall be run tested at the factory. This unit shall be mounted indoors, with access



and service clearance provided for each controller. The sum of connected capacity of all in-door air handlers shall range from 50% to 150% of rated capacity. The BC Controller shall be suitable for use in plenums in accordance with UL1995 ed 4.

B. BC Unit Cabinet:

1. The casing shall be fabricated of galvanized steel.

2. Each cabinet shall house a liquid-gas separator and multiple refrigeration control valves.

3. The unit shall house two tube-in-tube heat exchangers.

C. Refrigerant

1. R410A refrigerant shall be required.

D. Refrigerant Branches

1. All BC Controller refrigerant pipe connections shall be brazed or flared.

E. Refrigerant valves:

1. The unit shall be furnished with multiple branch circuits which can individually accommo-date up to 54,000 BTUH and up to three indoor units. Branches may be twinned to allow more than 54,000 BTUH.

2. All branches shall have

3. Each branch shall have multiple two-position valves to control refrigerant flow.

4. Service shut-off valves shall be field-provided/installed for each branch to allow service to any indoor unit without field interruption to overall system operation.

5. Linear electronic expansion valves shall be used to control the variable refrigerant flow.

2.6 INDOOR/EVAPORATOR UNITS

A. All Indoor/Evaporator Units: Factory assembled and tested DX fan-coil units, with electronic proportional expansion valve, control circuit board, factory wiring and piping, self-diagnostics, auto-restart function, 3-minute fused time delay, and test run switch. 1. Refrigerant: Refrigerant circuits factory-charged with dehydrated air, for field charging. 2. Temperature Control Mechanism: Return air thermistor and computerized Proportional-

Integral-Derivative (PID) control of superheat. 3. Coils: Direct expansion type constructed from copper tubes expanded into aluminum fins

to form a mechanical bond; waffle louver fin and high heat exchange, rifled bore tube design; factory tested. a. Provide thermistor on liquid and gas lines.

4. Fans: Direct-drive, with statically and dynamically balanced impellers; high and low speeds unless otherwise indicated; motor thermally protected.

5. Return Air Filter: Washable long-life net filter with mildew proof resin, unless otherwise indicated.



6. Condensate Drainage: Built-in condensate drain pan with PVC drain connection. Contractor shall route condensate from connection to grade, mop sink or other concealed hub drain. Routing shall be coordinated to avoid conflicts.

7. Cabinet Insulation: Sound absorbing foamed polystyrene and polyethylene insulation.

B. Air Handling Units: Factory-painted heavy gage steel casing insulated with sound absorbing foil faced insulation. 1. Secondary condensate drain pan; field installed. 2. Fan: Direct-drive ECM type fan with automatic airflow adjustment. 3. Provide air filter and external filter box.

PART 3 - EXECUTION

3.1 EXAMINATION

A. Verify that required electrical services have been installed and are in the proper locations prior to starting installation.

B. Verify that condensate piping has been installed and is in the proper location prior to starting installation.

C. Notify if conditions for installation are unsatisfactory.

3.2 INSTALLATION

A. Install in accordance with manufacturer's instructions.

B. Install refrigerant piping in accordance with equipment manufacturer's instructions.

C. Perform wiring in accordance with NFPA 70, National Electric Code (NEC).

D. Coordinate with installers of systems and equipment connecting to this system.

3.3 SYSTEM STARTUP

A. Prepare and start equipment and system in accordance with manufacturer's instructions and recommendations.

B. Adjust equipment for proper operation within manufacturer's published tolerances.

3.4 PROTECTION

A. Protect installed components from subsequent construction operations.

3.5 WARRANTY

A. 7 year Compressor and 1 year standard parts warranty and 1 year labor for the VRV System.



3.6 ADDITIONAL CONTRACTOR REQUIREMENTS & INFORMATION

A. Mechanical Contractors must be VRV certified installers.

B. Awarded Mechanical Contractor must provide a shop drawing for any changes made that varies from the drawing including the approval of the listed manufacturer. This shop drawing must be approved by the mechanical engineer and architect.

C. Awarded mechanical contractor must compete a Pre-Commissioning VRV Checklist provided by the awarded VRV manufacturer. This completed Pre-Commissioning VRV Checklist must be verified by the Owner’s representative and confirmed by the manufacturer prior to the Start-Up and commissioning of the VRV systems. The Start-Up and Commissioning Checklist must be submitted at least 10 days prior to the selected start-up date. The Service Technician must be on the jobsite to perform the start-up/commissioning, in person, and not via phone, email or texting.

D. Awarded VRV Manufacturer must certify a minimum of 2 owner employees for the minimum of 3 day VRV certification class at no expense to the owner. The certification must be conducted locally within the State Of Georgia.

E. Any changes made to the piping, electrical, or installation of the VRF system that may cause an increase or change to the contractor’s original bid will be left up the awarded contractor to absorb these and all costs. The changes will not be accepted as a ‘change order’ or charged back to the general contractor, mechanical engineer, architect or owner.

END OF SECTION 238129


PACKAGED ENERGY RECOVERY VENTILATION UNITS 237200 - 1

SECTION 237200 – PACKAGED ENERY RECOVERY VENTILATION UNITS

PART 1 - GENERAL

1.1 DOCUMENT INTENT

A. This specification is intended to provide product and performance requirements for all energy recovery units supplied on Forsyth County Schools projects. All outside air and exhaust air shall be routed to/from an ERU in compliance with this specification unless prior approval for an alternative has been provided by Forsyth County Schools.

1.2 SUMMARY

A. Section Includes: 1. Packaged energy recovery ventilation units, including required controls interface.

1.3 ACTION SUBMITTALS

A. Product Data: For each type of product indicated. Include rated capacities, operating characteristics, furnished specialties, and accessories.

B. Shop Drawings: For packaged energy recovery ventilation units. Include plans, elevations, sections, details, and attachments to other work.

1. Detail equipment assemblies and indicate dimensions, weights, loads, required clearances, method of field assembly, components, and location and size of each field connection.

2. Wiring Diagrams: For power, signal, and control wiring.

1.4 INFORMATIONAL SUBMITTALS

A. Coordination Drawings: Plans, elevations, and other details, drawn to scale, on which the following items are shown and coordinated with each other, using input from Installers of the items involved:

1. Suspended ceiling components. 2. Structural members to which equipment or suspension systems will be attached.

B. Field quality-control reports.

1.5 CLOSEOUT SUBMITTALS

A. Operation and Maintenance Data: For packaged energy recovery ventilation units to include in maintenance manuals.



1.6 MAINTENANCE MATERIAL SUBMITTALS

A. Furnish extra materials that match products installed and that are packaged with protective covering for storage and identified with labels describing contents.

1. Filters: One set of each type of filter specified. 2. Fan Belts: One set of belts for each belt-driven fan in energy recovery units. 3. Wheel Belts: One set of belts for each heat wheel.

1.7 QUALITY ASSURANCE

A. Electrical Components, Devices, and Accessories: Listed and labeled as defined in NFPA 70, by a qualified testing agency, and marked for intended location and application.

B. ARI Compliance:

1. Capacity ratings for packaged energy recovery ventilation units shall comply with ARI 1060, "Performance Rating of Air-to-Air Heat Exchangers for Energy Recovery Ventilation Equipment."

2. Capacity ratings for air coils shall comply with ARI 410, "Forced-Circulation Air- Cooling and Air-Heating Coils."

C. ASHRAE Compliance:

1. Applicable requirements in ASHRAE 62.1, Section 5 - "Systems and Equipment" and Section 7 - "Construction and Startup."

2. Capacity ratings for packaged energy recovery ventilation units shall comply with ASHRAE 84, "Method of Testing Air-to-Air Heat Exchangers."

D. NRCA Compliance: Roof curbs for roof-mounted equipment shall be constructed according to recommendations of NRCA.

E. UL Compliance:

1. Packaged heat recovery ventilators shall comply with requirements in UL 1812, "Ducted Heat Recovery Ventilators.”

2. Electric coils shall comply with requirements in UL 1995, "Heating and Cooling Equipment."

1.8 COORDINATION

A. Coordinate layout and installation of packaged energy recovery ventilation units and suspension system with other construction that penetrates ceilings or is supported by them, including light fixtures, HVAC equipment, fire-suppression system, and partition assemblies.

B. Coordinate sizes and locations of concrete bases with actual equipment provided.

C. Coordinate sizes and locations of roof curbs, equipment supports, and roof penetrations with actual equipment provided.



1.9 WARRANTY, STARTUP AND TRAINING

A. A full Parts & Labor warranty shall be provided by the manufacturer for a period of 12 months from start-up. The manufacturer shall agree to replace/repair, within warranty period, components with inadequate and defective materials and workmanship, including leakage, breakage, improper assembly, or failure to perform as required provided manufacturer’s instructions for handling, installation, protecting, and maintaining units have been adhered to during warranty period. Replacement is limited to defects and failures and does not include filters, belts or fuses. Warranty includes all parts, labor & travel during the warranty period.

B. Units shall be started-up by Manufacturer factory personnel – not an authorized representative of the factory. Complete start-up documentation shall be sent to the County after the job is completed. A minimum of two days training will be required for County personnel after the job is complete. Manufacturer to provide factory direct (direct employee of the manufacturer) service personnel within 100 miles of the site.

C. Compressor warranty shall include parts for a period of 5 years

PART 2 - PRODUCTS

2.1 PACKAGED ENERGY RECOVERY VENTILATION UNITS

A. Manufacturers: Subject to compliance with requirements, MUNTERS DryCool ERVc or approved equal product by AnnexAir Inc., NovelAire Technologies, or Des Champs.

B. Quality 1. Sizes, arrangements, capacities and performance shall be as indicated on plans and

schedules. Unit manufacturer shall be registered under ISO 9001. Coil performance shall be rated in accordance with ARI standards. Unit shall be ETL listed. Units shall be factory pre-assembled, tested and shipped complete with all components necessary to maintain humidity control levels independent of load variations within design limits. Unit(s) shall be designed for year-round 24 hr/day service.

C. Desiccant Wheel: 1. The desiccant wheel media shall be a monolithic, extended-surface contact medium,

fabricated entirely of inert, inorganic binders and glass fibers formed into narrow passages in the direction of airflow. The wheel shall be non-toxic. The process and reactivation air streams shall be separated by air seals and internal partitions so that the humid reactivation air does not mix with the dry process air. Suppliers who do not manufacture their own desiccant wheel, shall provide a five year parts and labor warranty for the wheel and carry stock sufficient to ship replacements within 24 hours. The proposed equipment shall meet the following minimum requirements: a. Wheel Face Seals: The dehumidifier shall have full-face seals on both the process

air entering and the process air leaving sides of the wheel. These shall seal the entire perimeter of both air streams as they enter and leave the wheel. Partial seals shall not be acceptable. The seals shall be the silicone rubber bulb-type, with a protective strip of low-friction, abrasive-resistant surface to extend seal life and reduce the force needed to turn the desiccant wheel. Neither wiper-type seals nor brush-type nor any non-contact-type seal shall be acceptable for the desiccant wheel. The seals shall be documented to have a minimum working life of 25,000 hours of normal operation.

b. Materials: The glass fibers which form the support matrix shall be made from uniform continuous strands larger than five microns in diameter which are non-

http://www.specagent.com/Lookup?ulid=3588



respirable and are not considered a possible health risk by the International Agency for Research on Cancer (IARC).

c. Flame spread and smoke generation: The wheel shall be tested according to ASTM E84-90 (Standard Test Method for Surface Burning of Building Materials) and shall achieve the following results: 1) Flame spread index = 0 2) Smoke developed index = 10

d. Desiccant impregnation: The desiccant shall be evenly impregnated throughout the structure for predictable, consistent performance and for maximum wheel life. Coatings applied on top of the contact medium shall not be acceptable unless the manufacturer can provide independent life tests demonstrating less than a 5% decline in desiccant capacity over a five year period of normal operation.

e. Desiccant type: The desiccant material used in wheels of units shall be Type III Brunauer isotherm desiccant. The desiccant impregnated into the contact medium shall be a titanium-reinforced silica gel. The desiccant wheel shall be a fabricated extended surface contact media with a multitude of small passages parallel to the airflow. The rotary structure shall be a monolithic composite consisting of inert silicates with microscopic pores designed to remove water in a vapor phase. The desiccant shall be hydro thermally -stabilized silica gel reinforced with titanium for maximum strength and stability over time. The fabricated structure shall be smooth and continuous having a depth of between 125 and 200 millimeters in the direction of airflow without interruptions or sandwich layers which restrict air flow or create a leakage path at joining surfaces. Nominal face velocity shall not exceed 1000 fpm. The wheel shall be manufactured in the United States. The manufacturer shall provide documentation to establish that: 1) The desiccant retains more than 90% of its original capacity after ten years

of continuous operation in clean air, with inlet air conditions up to an including 100% relative humidity.

2) The wheel as impregnated with silica gel is capable of withstanding five complete water immersion cleaning cycles while retaining more than 95% of its original adsorption capacity.

D. Desiccant Wheel Support and Drive Assembly 1. Desiccant wheels 60” in diameter and smaller shall be a single piece for fast removal and

simple handling. Larger wheels shall be segmented and allow for each segment to be removed individually. In addition, the wheel drive assembly shall provide: a. Rotational speed: To avoid excessive heat carryover from reactivation to the

process air, the wheel rotation speed shall not exceed 10 rph while achieving the required moisture removal rate at the specified conditions.

b. Drive Belt: smaller units shall use a polymer composite V-belt with link closure such that the belt can be changed without removing the wheel. Larger units shall use direct-drive wheels.

c. Drive motor: The drive motor shall be fractional horsepower and rated for continuous duty for a period of 20,000 hours under the load conditions imposed by the drive assembly.

d. Rotation detection: The drive assembly shall be equipped with a rotation detection circuit which shuts down the dehumidifier and signals the operator through an alarm if the wheel is not rotating.

E. Enthalpy Wheel Heat Exchanger 1. The rotary air-to-air heat exchanger. Suppliers who do not manufacture their own energy

recovery wheels shall provide a five year parts and labor warranty for the wheel and carry stock sufficient to ship replacements within 24 hours. a. Wheel Matrix: Rotor shall be constructed of rotating honeycomb matrix consisting

of a highly selective desiccant, permanently bonded to aluminum. The desiccant material shall be a molecular sieve with pore diameters ranging from 3A to 4A to



minimize the carryover of undesirable gases. The corrugated media provides individual flutes to channel the airflow and the thus minimize cross contamination and ensure rated performance under all differential pressure conditions. The desiccant coating shall provide corrosion resistance against attack from office, laboratory, hospital, pharmaceutical chemicals, etc., and protection in coastal and marine environments.

b. Wheel Casing: The wheel frames shall consist of evenly spaced galvanized steel spokes, galvanized steel outer band, and a rigid center hub. The wheel construction shall allow for wheel alignment. The wheel seals shall be brush type and shall be easily adjustable. Brush seals shall be included to separate fresh air from exhaust air across entire surface of air entering side, air leaving side and outer band (all four planes). Additionally, the entire circumference of the rotor shall include brush seal to minimize air bypass. Cassettes shall be fabricated of heavy-duty, reinforced 16-gauge galvanized steel. Bearings shall be outboard-flanged ball bearing with concentric locking collars. Bearings shall be permanently sealed and lubricated for zero maintenance and long life. Drive system shall consist of a heavy-duty AC motor driving a self-adjusting, easily replaceable multi-link belt. Heat exchangers shall be tested in accordance with ASHRAE Standard 84-1991 and ARI Standard 1060.

c. Variable speed drive and controls for economizer mode shall be provided as scheduled

d. Variable speed drive and controls for frost prevention shall be provided as scheduled.

F. Direct Expansion (DX) Cooling Coils 1. Coils shall be sized to provide the full capacity scheduled. Coils shall be arranged to

condition the full volume of process air. Refrigerant pressure drop to be between 1.5 psi and 5 psi, and air face velocities shall be 450 fpm or less. Coil circuiting provides for optimum performance with minimum pressure loss. Coil shall be designed for 600 PSI working pressure and factory tested under water at 600 PSI air pressure.

2. Direct expansion cooling coils are round-tube, plate-fin type constructed of seamless, smooth-walled copper tubes and .006 inch thickness aluminum fins mechanically bonded to tubes. Casing and tube support sheets are 16 gauge galvanized steel formed to provide mounting flanges and structural support for the fin-tube assembly. Supply headers consist of an expansion valve and distributor to feed liquid refrigerant through copper tubing to all circuits in the coil equally. Tubes are circuited to insure minimum refrigerant pressure drop and maximum heat transfer. Fin spacing of up to 12 FPI provides adequate transfer area to minimum air pressure drop. Direct expansion coils are rated in accordance with ARI Standard 410 and are compatible with all other components of the same refrigeration circuit.

G. Drain Pans 1. The drain pan is to be constructed of welded 304 SS and bolted in place. The cooling

coil drain pan shall extend the entire length of the coil and extend a minimum of 4 inches beyond the air leaving side of the coil. The drain pan shall be double-sloped to ensure zero standing water. Drain connection shall extend through unit base.

H. Condensing Section 1. Refrigeration system is complete with compressors, condenser heat exchangers, and all

controls and accessories required to regulate refrigerant pressure, flow rates and temperatures. The condensing unit is piped together with the evaporator coil and is sized and controlled to operate at all conditions required. The refrigeration equipment shall be capable of operation down to an ambient temperature of 50°F.

2. Compressors are variable speed scroll type. Service Access shall be provided around the entire compressor for maintenance. Each compressor shall have its own refrigeration circuit and expansion valve. Tandem compressors sets are not acceptable.



3. Condenser heat exchanger shall be sized to reject the heat absorbed by the evaporator coil and the work of compression at a low delta T relative to ambient to enhance efficiency. Coil circuiting provides for optimum performance with minimum pressure loss. Coil shall be round tube, plate-fin, or microchannel design. Coil shall be designed for 600 PSI working pressure and factory tested under water at 600 PSI air pressure.

I. Weather Protection (Outdoor Units) 1. The dehumidification system shall be capable of continuous outdoor operation. The air

inlets shall be protected from water entry by hoods, louvers, mist eliminators or connected duct work. Consequently, all access panels shall be weather tight, as shall all joints between casing and electrical conduits and between the unit casing and any components mounted in separate enclosures. The roof shall be fabricated using a capped standing seam or single piece style construction.

J. Fans 1. Fans provide the specified air volume(s) through the system with adequate static

pressure to overcome duct and distribution losses specified. a. Fan Blowers: Supply blowers shall be direct-driven plenum fans. Exhaust blowers

shall be direct driven plenum fans. React fan shall be belt-driven DWDI Forward curve or direct-driven plenum fan. Access shall be provided to all blowers for inspection and servicing. All fans shall be rated in accordance with AMCA Standard 210.

b. Fan Isolation: DWDI fans shall use rubber-in-shear isolation. SWSI fans shall use 1” spring isolation.

c. Fan Balancing: Fans shall be balanced such that the maximum displacement in any plane does not exceed 1.5 mils for fans operating at or below 2000 rpm or 1.0 mils for fans operating above 2000 rpm.

d. Premium Efficiency Fan Motors: Supply, exhaust, and reactivation fan motors shall be the totally-enclosed fan-cooled (TEFC), NEMA premium efficiency type with a minimum of Class F insulation on units with three-phase power.

K. Filters 1. The unit shall include disposable filters with 25% to 30% minimum efficiency with 90% to

92% arrestance minimum as rated by ASHRAE Test Standard 52-76. The filters shall be removable at the inlet of both supply and reactivation air streams. These filters shall be mounted on sliding or lift racks and accessible through access or doors. The entire supply and reactivation air stream shall be filtered.

L. Electrical Control Cabinet 1. The electrical control cabinet shall be weather tight to NEMA 3R standards and shall

include: a. Wiring to comply with the current National Electrical Code with further fuse and

wiring sizing to meet or exceed UL 508A Industrial Control Panel. b. Wires shall be color-coded or numbered at both ends and all terminal block

connection points shall be numbered. These markings shall correspond with the electrical diagram provided in the operating and maintenance manual.

c. Components shall be UL, ETL or CSA approved where possible. d. Operating and maintenance manual: The control cabinet shall include a copy of

the O & M manual, mounted in a separate compartment or pocket to allow access to critical information by maintenance personnel after installation.

e. All units shall come with a non-fused means of disconnecting the unit power.

M. Controls 1. The unit shall have microprocessor control. Units with a microprocessor shall be capable

of communicating with a building management system (BMS) through Native BACnet protocol. Control options include the ability to determine stages of heating and



dehumidification required to maintain space conditions when an “enable” command is given via the BMS or remote panel.

N. Indirect Fired Post Heaters 1. Heater shall conform to ANSI Z83.8. Unit shall be suitable for operation on natural gas or

propane as specified. Unit shall be of down blast or horizontal configuration. Unit shall have an input rating of 100, 150, 200, 250, 300, or 400 MBH at full fire and shall be 4:1 turndown modulating output. Where input is greater than 400 MBH multiple heaters shall be used. It shall contain tube type heated exchangers, flue gas collector with vent fan, in shot burners, and controls for high and low fire. Unit shall be un-housed and fit within the unit housing envelope dimensions.

2. Burners shall be die formed in shot type. Burners must be individually removable for cleaning or service. Entire burner assembly must be easily removable as an assembly.

3. Unit shall have a powered venting system consisting of a collection box, direct drive vent fan and an air proving switch. The collection box shall be made of the same material as the heat exchanger bulkhead plate and shall be removable. The venting fan bearings shall have a minimum L10 bearing life of 24000 hrs. The vent fan shall exhaust the flue gas horizontally out the side of the unit. The unit fan shall operate on 120/1/60 and not exceed 2 FLA.

4. Tubes shall be permanently attached to a bulkhead plate to form an airtight seal between combustion byproducts and heated air system. Heat exchanger shall be constructed of 18 gauge aluminized tubes with 14 gauge aluminized steel bulkhead plate. Heat exchanger shall be rated for a minimum lifespan of 100,000 cycles.

5. Gas train shall utilize components certified by AGA. Gas train shall consist of a 24 VAC two stage combination valve (manual on-off, automatic safety shutoff, regulation to handle 0.5 psig input pressure and adjustable pilot valve). The combination valve shall be rated at a flow of 400 MBH. The valve shall feed in shot burners through a manifold with screw in brass orifices sized for either natural gas or propane, as required by unit schedule. The flame controllers shall be solid state module that operates on 24 VAC. It shall have a built in spark igniter and flame sensor with 100% gas shutoff. The pilot shall be ignited during each cycle of operation. After the pilot is proven, the main burner valve shall open. Pilot and main burners shall be extinguished during the off cycle. The thermal disc type high temperature limit switch shall shut off the main and pilot valves if an overheat occurs.

O. Electric Post Heaters (Option, for use only where Natural gas is not available) 1. Electric heater shall be Underwriters Laboratories or Applied Research Laboratories

listed for zero clearance and shall meet the requirements of 2006 National Electrical Code and U.L. 1996 specifications file #E 50663.

2. Each heater shall be furnished with one or more automatic resets as an over temperature safety device(s), serviceable and replaceable, that will be de-energized the heater on over temperature.

3. Each heater shall be furnished with one or more manual resets as a secondary over temperature safety device(s), serviceable and replaceable, that will be de-energized part of the heater on over temperature or failure of the automatic reset(s).

4. Terminal box and element frame shall be of heavy gauge (minimum of 20 gauge) galvanized steel, sufficiently formed and braced to assure structural rigidity of the entire heater assembly, terminal box and terminal box cover must be totally enclosed and free of any perforation. Terminal box may have a false bottom design for greater cooling effect for the control components on large terminal boxes.

5. Heater shall have multiple stages with step control, or one stage optionally controlled by an SCR and a sequencer coordinating all stages to provide fully modulating control.

6. Heating elements(s) shall be high grade nickel-chrome alloy. Heating element(s) shall be held in place with floating steatite bushings. Heating element(s) are field replaceable. For maximum strength, the bracket must completely surround the ceramic bushing and have



1/32 inch total clearance between the bushing and metal. Double threaded stainless steel stud bolts.

7. Each heater shall be furnished with exact wiring diagram on the corner of the terminal box. Internal wiring is stranded copper only wrapped with 105C insulation 600V. Standard contactors per stage shall be 120V control circuit. Terminal block or lugs shall be sizes for installation of 75C copper wire for field wiring. Heaters over 48 amps total shall be sub-divided and circuit fused for protection. Control circuit (120V) shall be wired to the terminal block.

8. All components are recognized or listed components by UL.

P. Unit Base 1. Unit base shall be bolted steel construction with formed heavy gauge galvanized steel

channels around the outside perimeter and reinforced with galvanized steel cross members bolted on centers not exceeding 31 inches. Base shall have a minimum of four lifting brackets.

Q. Unit Structure 1. The unit casing shall be constructed using a double wall panel and frame system for

torsional rigidity. This includes walls, floors and ceilings. This system shall not contain any through metal. The unit casing shall also meet the following criteria based on ASTM E84-90 (Standard Test Method for Surface Burning of Building Materials), flame spread = 25, smoke index = 50.

2. The frame system components shall be constructed of fiberglass reinforced plastic (FRP) pultruded members. Horizontal frame members shall be supported along their length by intermediate supports and internal partitions. Through metal systems shall not be allowed. To avoid condensation, heat loss or loss of cooling capacity, each panel shall be 2 inches thick and constructed such that there are no through metal connections between the exterior surface and the interior surface. The interior casing shall be 22-gauge galvanized steel. The exterior casing shall be 22-gauge corrosion resistant galvalume. Manufacturers not providing exterior galvalume construction must provide painted galvanized exterior panels. Painted coating must be corrosion resistant exceeding ANSI 2000 hour salt spray standards. Panels shall be foam injected into individual panels with a density of 2-1/2 lb/ft3. The heat transfer rate through casing walls shall be less than 0.0625 Btu/sq. ft./°F equivalent to an R-value of 14. This construction shall be suitable for a 50°F difference as tested between process air dry bulb temperature and the dew point of the air surrounding the plenum. The unit casing shall be manufactured as an air and vapor tight system. There shall be a gasket system which seals the panels to the structure. Fixed panels shall be provided with flat closed cell neoprene and be sealed in place with FDA approved silicon. Doors and plug panels shall be provided with polyvinyl chloride seals.

R. Access Doors and Panels 1. Access doors or plug panel doors will be provided as indicated on the drawings. Doors

shall be rigid double wall construction and shall use heavy-duty hinges with lockable latches on each door. Doors shall be a minimum of 15” in width. Doors shall be of the same construction as panels. Door latches shall be capable of being fully tightened against gasket surfaces. All major components such as coils, filters, blowers, etc., within the air handling structure shall be easily removable through access panels without dismantling plenums or distributing ductwork. Equipment that requires disassembly of components rather than access through removable or hinged panels shall not be acceptable. The unit casing shall include access panels for inspection and for any maintenance required by the operating and maintenance manual. Panels without gaskets shall not be acceptable.

S. Recirculation/Bypass Damper 1. Provide recirculation damper for operation in unoccupied mode.



T. Characteristics 1. Outside Air:

a. Summer (High Sensible) 1) Entering-Air Temperature, Dry Bulb: 93 deg F. 2) Entering-Air Temperature, Wet Bulb: 75 deg F.

b. Summer (High Latent) 1) Entering-Air Temperature, Dry Bulb: 82 deg F. 2) Entering-Air Temperature, Wet Bulb: 77 deg F.

c. Winter 1) Entering-Air Temperature, Dry Bulb: 17 deg F.

2. Exhaust Air: a. Summer:

1) Entering-Air Temperature, Dry Bulb: 75 deg F. 2) Entering-Air Temperature, Wet Bulb: 63 deg F.

b. Winter: 1) Entering-Air Temperature, Dry Bulb: 68 deg F. 2) Entering-Air Temperature, Wet Bulb: 52 deg F.

3. Supply Air: a. Summer:

1) Leaving-Air Temperature, Dry Bulb: 55-74 deg F. 2) Leaving-Air Dew Point Temperature: 45 deg F.

b. Winter: 1) Leaving-Air Temperature, Dry Bulb: 75 deg F.

2.2 CONTROLS

A. Manufacturer provide controls 1. Provide Native BACnet via MS/TP or IP Protocol to allow for the Building Automation

System (BMS) to monitor, enable and disable unit operation. 2. Provide all required sensors and components required for independent control of the unit

to meet all control parameters without control input from BMS.

B. Building Automation System (BMS) 1. Unless noted otherwise, and except as indicated for packaged equipment to be controlled

by equipment manufacturer, all controls shall be provided and installed under this contract by Synergy Automation, Inc. Contact Marvin Crumbley at (770) 451-4502.

PART 3 - EXECUTION

3.1 UNIT CONTROL SEQUENCE

A. Unit Control Overview 1. The ERU is intended to provide an economical way to control the space dew point while

delivering room neutral supply air. 2. The ERU shall include a variable speed compressor with variable capacity to allow for

supply air control. a. The unit will operate to dehumidify the supply air to maintain the space dew-point

and limit supply dry bulb temperature. Space feedback can be onboard space sensor or BMS space data. Space dew-point setpoint is defined by the end user



and can be changed through BMS. Supply dew-point is a calculated value from the unit microprocessor. Unit shall be constant airflow. Duct mounted sensors shall be provided by the manufacturer for control.

3. The enthalpy wheel will rotate if the system is operating in the occupied mode and the outside air is warmer than 75°F (adjustable) or the dew point is greater than 51°F (adjustable) or in the heating mode (if the outside air is below 55°F, adjustable). Units with optional freeze protection will modulate the enthalpy wheel motor to maintain at least a 33°F exhaust leaving air temperature to prevent frosting.

4. In the dehumidification mode, the process air leaving the enthalpy wheel is first pre-cooled and dehumidified using a single stage of direct expansion refrigeration. This cooler and dryer air is then passed through a regenerative desiccant wheel to further reduce the moisture content and reheat the air to a neutral level. The desiccant wheel’s ability to absorb moisture is regenerated with a separate air stream that is heated with the waste heat from the refrigeration reactivation condenser of the same direct expansion system. If the supply air temperature or humidity is higher than setpoint, then additional stages of direct expansion refrigeration will be turned on to assist in removing moisture from the air stream. The additional stages include a compressor which has variable capacity and will be modulated to maintain the supply air dew-point and temperature at or below setpoint, within its capacity.

5. In cooling only mode, the desiccant wheel is turned off. 6. Heating the supply air is accomplished with a modulating gas fired burner, hot water, or

electric heat to maintain the supply air temperature set point. 7. A VFD shall be provided on the supply, reactivation and exhaust fans. A VFD can be

added to the supply fan for variable airflow. Where not actively controlled, the VFD shall be used for airflow balancing.

B. BMS Control 1. The BMS shall be able to enable the unit, change status from occupied to unoccupied,

and modify the adjustable set points listed in the sequence to customize the control and behavior of the unit. If no space sensor is ordered or installed, the BMS can write the space temperature and humidity information to the corresponding BMS points.

C. Unit Operation 1. Once an operating mode is selected by the building automation system or the unit

keypad/display, the Supply Fan will start. After air flow is proven, the unit will operate autonomously as described below: a. Dehumidification: If the dew-point of the air entering the DX coil is higher than the

supply air dew-point setpoint, then the unit will enter dehumidification mode. Unit microprocessor will stage internal components to deliver air at or below setpoints. During dehumidification, if supply air dry-bulb temperature gets too warm, even if the supply dew-point is being met, the variable compressor capacity will be increased to lower the supply air temperature. However, this will consume additional energy and the leaving air dry-bulb limit cannot be set below 72°F.

b. Cooling: If the dew-point of the air entering the DX coil is lower than the supply air dew-point setpoint and the temperature is greater than the leaving air dry-bulb setpoint, then the unit will enter cooling mode. Unit microprocessor will stage internal components to deliver air at the supply air dry-bulb setpoint. For units without space feedback, this air will be at the same setpoint as during DH, with a minimum of 72° F. Units with space feedback may deliver cooler air if the space temperature is above setpoint.

c. Heating: If the ambient temperature is below 55°F (adjustable), then heating will be enabled. For units without space feedback, the heater will be modulated to maintain 85°F (adjustable). Units with space feedback may deliver warmer or cooler air as dictated by space conditions.

D. Alarms



1. Critical Alarms(require reset, unit shutoff) a. Supply air flow b. Exhaust air flow c. Reactivation air flow d. Supply fan motor overload fault e. Exhaust fan motor overload fault f. Reactivation fan motor overload fault g. Smoke h. Heat fail & Supply Air Temp < 55°F

2. Non-Critical Alarms(require reset) a. DH Wheel motor overload b. DH Wheel rotation c. Low suction pressure: Comp. A d. High discharge pressure: Comp. A e. Low differential pressure: Comp. A f. Enthalpy Wheel rotation g. Enthalpy Wheel motor fault h. Low suction pressure: Compressor B i. High discharge pressure: Compressor B j. Low differential pressure: Compressor B k. Sensors

3. Alarm Notes a. All resettable alarms can be reset through the BACview display or BMS. b. If the alarm persists after resetting it, the root cause remains. c. The sensor alarms cannot be reset, as the sensor is reading out of the expected

range. The sensor must be put into range to clear the alarm.

3.2 EXAMINATION

A. Examine areas and conditions, with Installer present, for compliance with requirements for installation tolerances and other conditions affecting performance of the Work.

B. Examine casing insulation materials and filter media before packaged energy recovery ventilation unit installation. Reject insulation materials and filter media that are wet, moisture damaged, or mold damaged.

C. Examine roughing-in for electrical services to verify actual locations of connections before installation.

D. Proceed with installation only after unsatisfactory conditions have been corrected.

3.3 INSTALLATION

A. Install heat wheels so supply and exhaust airstreams flow in opposite directions and rotation is away from exhaust side to purge section to supply side.

1. Install access doors in both supply and exhaust ducts, both upstream and downstream, for access to wheel surfaces, drive motor, and seals.

2. Install removable panels or access doors between supply and exhaust ducts on building side for bypass during startup.

B. Install gas-fired furnaces according to NFPA 54, "National Fuel Gas Code."



C. Install ground and floor mounted units on 6-inch-high concrete base.

D. Equipment Mounting:

1. Install packaged energy recovery ventilation units on cast-in-place concrete equipment bases designed by a Registered Structural Professional Engineer for the specific application.

E. Roof Curb: Install packaged energy recovery ventilation units on curbs and coordinate roof penetrations and flashing with roof construction. Secure packaged energy recovery ventilation units to upper curb rail, and secure curb base to roof framing or concrete base with anchor bolts.

F. Unit Support: Install unit level on structural support. Coordinate wall penetrations and flashing with wall construction. Secure packaged energy recovery ventilation units to structural support with anchor bolts.

G. Install units with access and clearances for service and maintenance.

H. Install new filters at completion of equipment installation and before testing, adjusting, and balancing.

I. Pipe drains from drain pans to nearest floor drain; use ASTM B 88, Type L, drawn-temper copper water tubing with soldered joints, same size as condensate drain connection. Where units are outside, pipe condensate to designed French drain.

J. All exterior ductwork shall be double wall, internally lined, and shall be sealed with weatherproof elastomeric coating. Install such that no “ponding” of water can occur on the ductwork.

3.4 CONNECTIONS

A. Install duct and piping adjacent to unit to allow service and maintenance.

B. Connect cooling condensate drain pans with air seal trap at connection to drain pan and install cleanouts at changes in pipe direction.

C. Gas piping serving the unit shall be designed by a Registered Professional Engineer. Connect gas piping with shutoff valve and union and with sufficient clearance for burner removal and service.

D. Install electrical devices furnished with units but not factory mounted. Electrical service to unit shall be designed by a Registered Electrical Professional Engineer.

3.5 FIELD QUALITY CONTROL

A. Manufacturer's Field Service: Engage a factory service representative to inspect, test, and adjust components, assemblies, and equipment installations, including connections.

B. Perform tests and inspections.

1. Manufacturer's Field Service: Engage a factory service representative to inspect components, assemblies, and equipment installations, including connections, and to assist in testing.



C. Tests and Inspections:

1. Operational Test: After electrical circuitry has been energized, start units to confirm proper motor rotation and unit operation.

2. Adjust seals and purge. 3. Test and adjust controls and safeties. Replace damaged and malfunctioning controls and

equipment. 4. Set initial temperature and humidity set points. 5. Set field-adjustable switches and circuit-breaker trip ranges as indicated.

D. Packaged energy recovery ventilation units will be considered defective if it does not pass tests and inspections.

E. Prepare test and inspection reports.

3.6 DEMONSTRATION

A. Engage Manufacturer factory personnel to train County's maintenance personnel to adjust, operate, and maintain air-to-air energy recovery units.



ELECTRICAL GENERAL PROVISIONS 260010 - 1

SECTION 260010 – ELECTRICAL GENERAL PROVISIONS

PART 1 - GENERAL

1.1 PROJECT DESCRIPTION

A. This project involves the replacement of existing lighting fixtures with new LED fixtures in parking garage at CDC Building 161. The contractor shall be responsible for all electrical work as required to construct complete and operable electrical systems.

B. Furnish and install electrical systems, materials, equipment, and accessories in accordance with the specifications and drawings.

C. The general provisions of the Contract, including General and Supplementary Conditions and General Requirements, apply to the portions of work specified each Section of this Division, individually and collectively.

1.2 EXISTING CONDITIONS

A. Contractor shall note that all work is to occur within an existing facility. Contractor shall carefully and thoroughly review existing conditions which will affect the work. Work shall be scheduled to avoid conflicts with building activities.

B. Existing services and facilities damaged by the contractor through negligence or through use of faulty materials or workmanship shall be promptly repaired, replaced or otherwise restored to previous conditions by the Contractor without additional cost to the Owner.

C. Interruptions of services necessary for connection to or modification of existing systems or facilities shall occur only at prearranged times approved by the Owner. Interruptions shall only occur after the provision of all temporary work and the availability of adequate labor and materials will assure that the duration of the interruption will not exceed the time agreed upon.

D. Existing materials demolished and/or removed during the course of work shall be stored on site at a location and in a manner as directed by the Owner. Materials shall remain the property of the Owner until released by the Owner’s authorized representative for removal. Once released, the material shall become the property of the Contractor and shall be removed from the site at no additional cost to the Owner.

1.3 COORDINATION

A. In the event of a discrepancy between equipment quantities, sizes, or scope definition when comparing specifications, drawings, existing conditions, and/or verbal/written communication received, the contractor shall immediately notify the client.

B. Contractor shall verify all equipment voltages prior to ordering equipment.



C. Contractor shall coordinate to allow proper access around all new equipment allowing for adequate clearance to allow for manufacturer’s recommended clearances and code-required clearances.

1.4 CODE COMPLIANCE

A. All work shall be performed in accordance with all adopted laws, codes, ordinances, regulations, standards, etc. of all federal, state, and local authorities having jurisdiction.

B. Applicable codes, regulations, etc. shall be the most recent edition adopted by the governing authority.

C. In each of the adopted codes, regulations, etc. with which the project must comply, advisory provisions shall be considered as mandatory. Equipment, materials, installation, and workmanship shall be in accordance with the mandatory and advisory provisions of NFPA 70 “National Electrical Code” and ANSI/IEEE C2 “National Electrical Safety Code” unless more stringent requirements are specified or indicated.

D. The drawings and specifications shall govern in those instances where requirements are greater than those stated in adopted codes, standards, etc.

1.5 WORK PERFORMANCE

A. Job site safety and worker safety is the responsibility of the Contractor.

B. Electrical work shall be accomplished with all affected circuits or equipment de-energized.

C. For work that affects existing electrical systems, arrange, phase and perform work to assure minimal interference and normal functioning of the facility.

D. New work shall be installed and connected to existing work neatly, safely and professionally. Disturbed or damaged work shall be replaced or repaired to its prior or better condition.

E. Coordinate location of equipment and conduit with other trades to minimize interference.

F. Existing electrical equipment whose electrical characteristics are modified as part of the work, such as being renamed, re-fused, or receiving new feeder or load, shall be relabeled in accordance with Section 260553 “Identification of Electrical Systems”. Existing panelboards shall receive updated panelboard directories; directories shall be neat, typewritten, and accurately reflect new and existing circuits. Existing circuits shall be verified.

1.6 SYSTEMS REQUIRING ELECTRICAL ROUGH-IN

A. Rough-in shall consist of all outlet boxes, raceway systems, supports and sleeves required for the installation of cables and devices by other Divisions or by the Owner. It shall be the responsibility of the Contractor to determine the requirements by reviewing the contract documents and meeting with the Superintendent of the trade involved and the Owner’s representative to review submittal data, shop drawings, etc.



1.7 FIRESTOPPING

A. A fire-stop shall be provided wherever conduit, bus duct, cable tray, cables, etc. penetrates fire partitions, fire walls and floors to maintain an effective fire, smoke, and gas barrier. Sealing of all sleeves to meet the fire rating of the assembly, whether active or not, is work of this Division.

1.8 CONDUCTOR AMPACITIES

A. Conductor ampacities specified or shown on the drawings are based on copper conductors, with conduit and raceways sized per the NEC. Aluminum conductors are prohibited.

1.9 MISCELLANEOUS

A. The electrical drawings are intended to be diagrammatic and indicate the general arrangement of electrical equipment. They are not intended to show every item in its exact location, the exact dimensions, or all the details of the equipment. Do not scale electrical plans. Obtain all dimensions from the Architect’s dimensioned drawings and field measurements. Review Architectural plans for door swings and built-in equipment. The contractor shall verify the actual dimensions of the equipment proposed to ensure that the equipment will fit in the available space.

B. Coordinate installation of electrical equipment with the structural and mechanical equipment and access thereto. Coordinate exterior electrical work with civil and landscaping work.

C. Discrepancies shown on different drawings, between drawings and specifications, or between documents and field conditions shall be installed to provide the better quality or greater quantity of work; or, comply with the more stringent requirement; either or both in accordance with the Architect’s/Engineer’s interpretation.

PART 2 - PRODUCTS

2.1 STANDARD PRODUCTS

A. Provide materials and equipment that are products of manufacturers regularly engaged in the production of such products which are of equal material, design and workmanship. Products shall have been in satisfactory commercial or industrial use for 2 years prior to bid opening. The 2-year period shall include applications of equipment and materials under similar circumstances and of similar size. The product shall have been on sale on the commercial market during the 2-year period. Where two or more items of the same class of equipment are required, these items shall be products of a single manufacturer; however, the component parts of the item need not be the products of the same manufacturer, unless stated in the technical section.

B. Products manufactured more than 3 years prior to date of delivery to site shall not be used, unless specified otherwise.

C. All materials and equipment used shall be new, undamaged and free of any defects.



D. Electrical equipment shall have factory-applied painting systems which shall, as a minimum, meet the requirements of NEMA 250 corrosion-resistance test, and additional requirements specified in the technical sections.

2.2 TEST STANDARDS

A. All electrical materials and equipment shall be listed, labeled, or certified by a nationally recognized testing laboratory to meet Underwriters Laboratories, Inc. (UL) standards, where test standards have been established. Materials and equipment which are not covered by UL standards will be accepted, providing that materials and equipment are listed, labeled, certified or otherwise determined to meet the safety requirements of a nationally recognized testing laboratory.

2.3 BID BASIS / SUBSTITUTION PROCEDURES

A. Enclosed documents list specific manufacturers, model numbers, and performance requirements for the type of equipment specified. Equipment must meet all specified requirements. Equipment must be of the specified or listed alternate manufacturers. Alternate manufacturers shall match size and appearance of specified equipment.

B. Specified materials or listed alternates shall be provided unless prior approval of a substitution is substitution is given by addenda. Proposed substitutions must be submitted in writing to the Contracting Officer for approval, at least 10 days prior to opening of bids.

2.4 FIRESTOPPING

A. A firestop system shall be used to seal penetrations of electrical conduits and cables through fire-rated partitions per N.E.C. (2014) 300-21, 800.26, and other applicable sections.

B. The firestop system shall consist of a fire-rated caulk type substance and a high temperature fiber insulation. It shall be permanently flexible, waterproof, non-toxic, smoke and gas tight, and have a high adhesion to all solids, so damming is not required. The system shall meet or exceed the fire-rating of the partition. Only metal conduit shall be used in conjunction with this system to penetrate fire-rated partitions. Install in strict compliance with manufacturer’s recommendations. 3M or approved equal.

2.5 NAMEPLATES AND SIGNS

A. Each item of electrical equipment shall have a nameplate bearing the manufacturer’s name, address, model number, serial number, and electrical characteristics, securely affixed in a conspicuous place; the nameplate of the distributing agent will not be acceptable.

B. Refer to Section 260533 “Identification for Electrical Systems” for requirements for field fabricated and applied nameplates and warning signs.



PART 3 - EXECUTION

3.1 SUBMITTALS/SHOP DRAWINGS

A. Contractor shall provide six (6) copies of manufacturer’s product literature for all equipment and material proposed for installation. Submittals shall include catalog information, installation drawings, and performance criteria for each piece of equipment.

B. For any substitute equipment which is approved for installation, contractor shall be responsible for coordination of all requirements including electrical, structural, spacing, clearance, etc. As required.

C. Refer to Section 260510 “Electrical Submittals” for additional requirements.

3.2 INSTALLATION REQUIREMENTS

A. All equipment shall be provided in strict accordance with manufacturer’s requirements and recommendations. Consult with manufacturer’s technical experts for specific instructions on unique product conditions and unforeseen problems.

B. Deliver products to the project site properly identified with names, model numbers, types, grades, compliance labels and similar information needed for distinct identification. Provide products adequately packaged and protected to prevent deterioration during shipment, storage and handling. Store in a dry, well ventilated, indoor space, except where prepared and protected by the manufacturer specifically for exterior storage.

C. Equipment location shall be as close as practical to locations shown on the drawings. Working clearances shall not be less than specified in the N.E.C. Equipment shall be installed so that it is readily accessible, as defined in the N.E.C., for operation and maintenance. Where it is determined that the Contractor has installed equipment so that it is not readily accessible, the equipment shall be removed and reinstalled as directed, at no additional cost to the Owner.

D. Provide and install all required mounting hardware, support structures, pads, curbs, etc. Fasten nameplates to the device with a minimum of two sheet-metal screws or two rivets.

E. Electrical equipment that requires field-applied painting shall match finish of adjacent surfaces, or meet the indicated or specified safety criteria. Painting shall be as specified in Section 099000 “Paints and Coatings”, or the section specifying the associated electrical equipment.

F. Provide all labor, material and equipment to perform all tests required by the governing agencies, and submit a record of all test to the Owner or Owner’s Representative. Notify the Contracting Officer at least five day in advance of any testing.

G. Provide a copy of installation, operation, and maintenance manuals for each piece of equipment provided.

H. Provide the number of warning signs required to be readable from each accessible side, but space the signs a maximum of 30 feet apart.



3.3 CLEANING, REPAIR AND ADJUSTMENT

A. During installation, protect all equipment from damage and against entry of foreign matter.

B. All installed equipment and components shall be cleaned and free of debris prior to completion of work.

C. Scratched or marred surfaces shall be restored with touch-up paint furnished by the equipment manufacturer.

D. Replace all equipment and materials that become damaged. Replace all failed light fixture lamps, ballasts and drivers.

3.4 UTILITY CONNECTIONS

A. Coordinate the connection of the electrical system with the local power company. Comply with the requirements of governing regulations, franchised service companies and controlling agencies. Pay all utility fees and charges.

3.5 INSTRUCTION AND TRAINING

A. Where specified in other sections, furnish the services of competent, qualified instructors to give full instruction to designated personnel in the adjustment, operation and maintenance of the specified systems and equipment, including pertinent safety requirements. Instructors shall be thoroughly familiar with all parts of the installation and shall be trained in operating theory as well as practical operation and maintenance work. Instruction shall be given during the first regular work week after the system or equipment has been accepted and turned over to the Owner for regular operation.

3.6 POSTED OPERATING INSTRUCTIONS

A. Provide for each system and principal item of equipment as specified in the technical sections for use by operation and maintenance personnel. The operating instructions shall include the following:

1. Wiring diagrams, control diagrams, and control sequence for each principal system and

item of equipment. 2. Start up, proper adjustment, operating, lubrication, and shutdown procedures. 3. Safety precautions. 4. Procedures in event of equipment failure. 5. Other items of instruction as recommended by the manufacturer of each system or item of

equipment.

B. Print or engrave operating instructions and frame under glass or in approved laminated plastic. Post instructions where directed. Where exposed to the weather, provide weather-resistant materials or weatherproof enclosures. Operating instructions shall not fade when exposed to sunlight and shall be secured to prevent easy removal or peeling.



3.7 WARRANTY

A. All work performed and all equipment and material furnished under this scope of work shall be free from defects and shall remain so, subject to a warranty for a minimum of one year from the date of acceptance by the Owner. The warranty shall include all required parts and labor.

B. Provide the manufacturer’s standard printed commitment in reference to a specific product and normal application, stating that certain acts of restitution will be performed for the Purchaser or Owner by the manufacturer, when and if the product fails within certain operational conditions and time limits. Where the warranty requirements stated in a specification section exceed the manufacturer’s standard warranty, the more stringent requirements will apply, and a modified manufacturer’s warranty shall be provided. In no case shall the manufacturer’s warranty be less than one (1) year.

C. The equipment items shall be supported by service organizations which are reasonably convenient to the project site, in order to render satisfactory service to the equipment on a regular or emergency basis, during the warranty period of the contract.



LOW-VOLTAGE ELECTRICAL POWER CONDUCTORS AND CABLES 260519 - 1

SECTION 260519 - LOW-VOLTAGE ELECTRICAL POWER CONDUCTORS AND CABLES

PART 1 - GENERAL

1.1 SUMMARY

A. This Section includes the following:

1. Building wires and cables rated 600 V and less. 2. Connectors, splices, and terminations rated 600 V and less. 3. Sleeves and sleeve seals for cables.

1.2 SUBMITTALS

A. Product Data: For each type of product indicated.

B. Field quality-control test reports.


A. Electrical Components, Devices, and Accessories: Listed and labeled as defined in NFPA 70, Article 100, by a testing agency acceptable to authorities having jurisdiction, and marked for intended use.

B. Comply with NFPA 70.

PART 2 - PRODUCTS

2.1 CONDUCTORS AND CABLES

A. Copper Conductors: Comply with NEMA WC 70.

B. Conductor Insulation: Comply with NEMA WC 70 for Types THW, THHN-THWN, XHHW, UF, USE, and SO.

C. Multiconductor Cable: Comply with NEMA WC 70 for armored cable, Type AC, metal-clad cable, Type MC, mineral-insulated, metal-sheathed cable, Type MI, nonmetallic-sheathed cable, Type NM, and Type SO with ground wire.

2.2 CONNECTORS AND SPLICES

A. Available Manufacturers: Subject to compliance with requirements, manufacturers offering products that may be incorporated into the Work include, but are not limited to, the following:



B. Manufacturers: Subject to compliance with requirements, provide products by one of the following:

1. AFC Cable Systems, Inc. 2. Hubbell Power Systems, Inc. 3. O-Z/Gedney; EGS Electrical Group LLC. 4. 3M; Electrical Products Division. 5. Tyco Electronics Corp.

C. Description: Factory-fabricated connectors and splices of size, ampacity rating, material, type, and class for application and service indicated.

2.3 SLEEVES FOR CABLES

A. Steel Pipe Sleeves: ASTM A 53/A 53M, Type E, Grade B, Schedule 40, galvanized steel, plain ends.

B. Cast-Iron Pipe Sleeves: Cast or fabricated "wall pipe," equivalent to ductile-iron pressure pipe, with plain ends and integral waterstop, unless otherwise indicated.

C. Coordinate sleeve selection and application with selection and application of firestopping specified in Division 07 Section "Penetration Firestopping."

2.4 SLEEVE SEALS


B. Manufacturers: Subject to compliance with requirements, provide products by one of the following:

C. Basis-of-Design Product: Subject to compliance with requirements, provide product by one of the following:

1. Advance Products & Systems, Inc. 2. Calpico, Inc. 3. Metraflex Co. 4. Pipeline Seal and Insulator, Inc.

D. Description: Modular sealing device, designed for field assembly, to fill annular space between sleeve and cable.

1. Sealing Elements: [EPDM] [NBR] interlocking links shaped to fit surface of cable or conduit. Include type and number required for material and size of raceway or cable.

2. Pressure Plates: Carbon steel or Stainless steel. Include two for each sealing element. 3. Connecting Bolts and Nuts: Carbon steel with corrosion-resistant coating or Stainless

steel of length required to secure pressure plates to sealing elements. Include one for each sealing element.



PART 3 - EXECUTION

3.1 CONDUCTOR MATERIAL APPLICATIONS

A. Feeders: Copper. Solid for No. 10 AWG and smaller; stranded for No. 8 AWG and larger.

B. Branch Circuits: Copper. Solid for No. 10 AWG and smaller; stranded for No. 8 AWG and larger.

3.2 CONDUCTOR INSULATION AND MULTICONDUCTOR CABLE APPLICATIONS AND WIRING METHODS

A. Service Entrance: Type THHN-THWN or Type XHHW for single conductors in raceway;

B. Exposed Feeders: Type THHN-THWN, single conductors in raceway; Armored cable, Type AC; or Mineral-insulated, metal-sheathed cable, Type MI.

C. Feeders Concealed in Ceilings, Walls, Partitions, and Crawlspaces: Type THHN-THWN, single conductors in raceway; Armored cable, Type AC; or Mineral-insulated, metal-sheathed cable, Type MI.

D. Feeders Concealed in Walls may be Type MC.

E. Feeders Concealed in Concrete, below Slabs-on-Grade, and Underground: Type THHN-THWN, single conductors in raceway; or Underground feeder cable, Type UF.

F. Exposed Branch Circuits, Including in Crawlspaces: Type THHN-THWN, single conductors in raceway; Armored cable, Type AC; or Mineral-insulated, metal-sheathed cable, Type MI.

G. Branch Circuits Concealed in Ceilings, Walls, and Partitions: Type THHN-THWN, single conductors in raceway; Armored cable, Type AC; or Mineral-insulated, metal-sheathed cable, Type MI.

H. Branch Circuits Concealed in Concrete, below Slabs-on-Grade, and Underground: Type THHN-THWN, single conductors in raceway or Underground branch-circuit cable, Type UF.

I. Cord Drops and Portable Appliance Connections: Type SO, hard service cord with stainless-steel, wire-mesh, strain relief device at terminations to suit application.

J. Class 1 Control Circuits: Type THHN-THWN, in raceway.

K. Class 2 Control Circuits: Type THHN-THWN, in raceway; Power-limited cable, concealed in building finishes; or Power-limited tray cable, in cable tray.

3.3 INSTALLATION OF CONDUCTORS AND CABLES

A. Conceal cables in finished walls, ceilings, and floors, unless otherwise indicated.



B. Use manufacturer-approved pulling compound or lubricant where necessary; compound used must not deteriorate conductor or insulation. Do not exceed manufacturer's recommended maximum pulling tensions and sidewall pressure values.

C. Use pulling means, including fish tape, cable, rope, and basket-weave wire/cable grips, that will not damage cables or raceway.

D. Install exposed cables parallel and perpendicular to surfaces of exposed structural members, and follow surface contours where possible.

E. Support cables according to Division 26 Sections "Hangers and Supports for Electrical Systems."

F. Identify and color-code conductors and cables according to Division 26 Section "Identification for Electrical Systems."

G. Tighten electrical connectors and terminals according to manufacturer's published torque-tightening values. If manufacturer's torque values are not indicated, use those specified in UL 486A and UL 486B.

H. Make splices and taps that are compatible with conductor material and that possess equivalent or better mechanical strength and insulation ratings than unspliced conductors.

1. Use oxide inhibitor in each splice and tap conductor for aluminum conductors.

I. Wiring at Outlets: Install conductor at each outlet, with at least 12 inches (300 mm) of slack.

3.4 SLEEVE INSTALLATION FOR ELECTRICAL PENETRATIONS

A. Coordinate sleeve selection and application with selection and application of firestopping specified in Division 07 Section "Penetration Firestopping."

B. Concrete Slabs and Walls: Install sleeves for penetrations unless core-drilled holes or formed openings are used. Install sleeves during erection of slabs and walls.

C. Fire-Rated Assemblies: Install sleeves for penetrations of fire-rated floor and wall assemblies unless openings compatible with firestop system used are fabricated during construction of floor or wall.

D. Cut sleeves to length for mounting flush with both wall surfaces.

E. Extend sleeves installed in floors 2 inches (50 mm) above finished floor level.

F. Size pipe sleeves to provide 1/4-inch (6.4-mm) annular clear space between sleeve and cable unless sleeve seal is to be installed or unless seismic criteria require different clearance.

G. Seal space outside of sleeves with grout for penetrations of concrete and masonry and with approved joint compound for gypsum board assemblies.



H. Interior Penetrations of Non-Fire-Rated Walls and Floors: Seal annular space between sleeve and cable, using joint sealant appropriate for size, depth, and location of joint according to Division 07 Section "Joint Sealants."

I. Fire-Rated-Assembly Penetrations: Maintain indicated fire rating of walls, partitions, ceilings, and floors at cable penetrations. Install sleeves and seal with firestop materials according to Division 07 Section "Penetration Firestopping."

J. Roof-Penetration Sleeves: Seal penetration of individual cables with flexible boot-type flashing units applied in coordination with roofing work.

K. Aboveground Exterior-Wall Penetrations: Seal penetrations using sleeves and mechanical sleeve seals. Size sleeves to allow for 1-inch (25-mm) annular clear space between pipe and sleeve for installing mechanical sleeve seals.

L. Underground Exterior-Wall Penetrations: Install cast-iron "wall pipes" for sleeves. Size sleeves to allow for 1-inch (25-mm) annular clear space between cable and sleeve for installing mechanical sleeve seals.

3.5 SLEEVE-SEAL INSTALLATION

A. Install to seal underground exterior-wall penetrations.

B. Use type and number of sealing elements recommended by manufacturer for cable material and size. Position cable in center of sleeve. Assemble mechanical sleeve seals and install in annular space between cable and sleeve. Tighten bolts against pressure plates that cause sealing elements to expand and make watertight seal.

3.6 FIRESTOPPING

A. Apply firestopping to electrical penetrations of fire-rated floor and wall assemblies to restore original fire-resistance rating of assembly according to Division 07 Section "Penetration Firestopping."

3.7 FIELD QUALITY CONTROL

A. Perform tests and inspections and prepare test reports.

B. Tests and Inspections:

1. After installing conductors and cables and before electrical circuitry has been energized, test service entrance and feeder conductors for compliance with requirements.

2. Perform each visual and mechanical inspection and electrical test stated in NETA Acceptance Testing Specification. Certify compliance with test parameters.

3. Infrared Scanning: After Substantial Completion, but not more than 60 days after Final

Acceptance, perform an infrared scan of each splice in cables and conductors No. 3 AWG



and larger. Remove box and equipment covers so splices are accessible to portable scanner. a. Instrument: Use an infrared scanning device designed to measure temperature or

to detect significant deviations from normal values. Provide calibration record for device.

b. Record of Infrared Scanning: Prepare a certified report that identifies splices checked and that describes scanning results. Include notation of deficiencies detected, remedial action taken, and observations after remedial action.

C. Test Reports: Prepare a written report to record the following:

1. Test procedures used. 2. Test results that comply with requirements. 3. Test results that do not comply with requirements and corrective action taken to achieve

compliance with requirements.

D. Remove and replace malfunctioning units and retest as specified above.



GROUNDING AND BONDING FOR ELECTRICAL SYSTEMS 260526 - 1

SECTION 260526 - GROUNDING AND BONDING FOR ELECTRICAL SYSTEMS

PART 1 - GENERAL

1.1 SUMMARY

A. Section Includes: Grounding systems and equipment.

1.2 SUBMITTALS

A. Product Data: For each type of product indicated.

B. Field quality-control reports.


A. Electrical Components, Devices, and Accessories: Listed and labeled as defined in NFPA 70, by a qualified testing agency, and marked for intended location and application.

B. Comply with UL 467 for grounding and bonding materials and equipment.

PART 2 - PRODUCTS

2.1 CONDUCTORS

A. Insulated Conductors: Copper wire or cable insulated for 600 V unless otherwise required by applicable Code or authorities having jurisdiction.

B. Bare Copper Conductors:

1. Solid Conductors: ASTM B 3. 2. Stranded Conductors: ASTM B 8. 3. Tinned Conductors: ASTM B 33. 4. Bonding Cable: 28 kcmil, 14 strands of No. 17 AWG conductor, 1/4 inch (6 mm) in

diameter. 5. Bonding Conductor: No. 4 or No. 6 AWG, stranded conductor. 6. Bonding Jumper: Copper tape, braided conductors terminated with copper ferrules; 1-5/8

inches (41 mm) wide and 1/16 inch (1.6 mm) thick. 7. Tinned Bonding Jumper: Tinned-copper tape, braided conductors terminated with copper

ferrules; 1-5/8 inches (41 mm) wide and 1/16 inch (1.6 mm) thick.


GROUNDING AND BONDING FOR ELECTRICAL SYSTEMS 260526 - 2

2.2 CONNECTORS

A. Listed and labeled by an NRTL acceptable to authorities having jurisdiction for applications in which used and for specific types, sizes, and combinations of conductors and other items connected.

PART 3 - EXECUTION

3.1 APPLICATIONS

A. Conductors: Install solid conductor for No. 8 AWG and smaller, and stranded conductors for No. 6 AWG and larger unless otherwise indicated.

B. Underground Grounding Conductors: Install bare copper conductor, No. 2/0 AWG minimum. Bury at least 24 inches (600 mm) below grade.

3.2 EQUIPMENT GROUNDING

A. Install insulated equipment grounding conductors with the following items, in addition to those required by NFPA 70:

1. Lighting circuits.

3.3 INSTALLATION

A. Grounding Conductors: Route along shortest and straightest paths possible unless otherwise indicated or required by Code. Avoid obstructing access or placing conductors where they may be subjected to strain, impact, or damage.



HANGERS AND SUPPORTS FOR ELECTRICAL SYSTEMS 260529 - 1

SECTION 260529 - HANGERS AND SUPPORTS FOR ELECTRICAL SYSTEMS

PART 1 - GENERAL

1.1 SUMMARY

A. Section includes:

1. Hangers and supports for electrical equipment and systems.

1.2 PERFORMANCE REQUIREMENTS

A. Design equipment supports capable of supporting combined operating weight of supported equipment and connected systems and components.

B. Rated Strength: Adequate in tension, shear, and pullout force to resist maximum loads calculated or imposed for this Project, with a minimum structural safety factor of five times the applied force.


A. Welding: Qualify procedures and personnel according to AWS D1.1/D1.1M, "Structural Welding Code - Steel."


PART 2 - PRODUCTS

2.1 SUPPORT, ANCHORAGE, AND ATTACHMENT COMPONENTS

A. Mounting, Anchoring, and Attachment Components: Items for fastening electrical items or their supports to building surfaces include the following:

1. Powder-Actuated Fasteners: Threaded-steel stud, for use in hardened portland cement concrete, steel, or wood, with tension, shear, and pullout capacities appropriate for supported loads and building materials where used.

a. Available Manufacturers: Subject to compliance with requirements, manufacturers offering products that may be incorporated into the Work include, but are not limited to, the following:

1) Hilti Inc. 2) ITW Ramset/Red Head; a division of Illinois Tool Works, Inc. 3) MKT Fastening, LLC. 4) Simpson Strong-Tie Co., Inc.; Masterset Fastening Systems Unit.



2. Mechanical-Expansion Anchors: Insert-wedge-type, zinc-coated or stainless steel, for use in hardened portland cement concrete with tension, shear, and pullout capacities appropriate for supported loads and building materials in which used.

a. Available Manufacturers: Subject to compliance with requirements, manufacturers offering products that may be incorporated into the Work include, but are not limited to, the following:

1) Cooper B-Line, Inc.; a division of Cooper Industries. 2) Empire Tool and Manufacturing Co., Inc. 3) Hilti Inc. 4) ITW Ramset/Red Head; a division of Illinois Tool Works, Inc. 5) MKT Fastening, LLC.

3. Concrete Inserts: Steel or malleable-iron, slotted support system units similar to MSS Type 18; complying with MFMA-4 or MSS SP-58.

4. Clamps for Attachment to Steel Structural Elements: MSS SP-58, type suitable for attached structural element.

5. Through Bolts: Structural type, hex head, and high strength. Comply with ASTM A 325.

6. Toggle Bolts: All-steel springhead type. 7. Hanger Rods: Threaded steel.

PART 3 - EXECUTION

3.1 APPLICATION

A. Comply with NECA 1 and NECA 101 for application of hangers and supports for electrical equipment and systems except if requirements in this Section are stricter.

3.2 SUPPORT INSTALLATION

A. Comply with NECA 1 and NECA 101 for installation requirements except as specified in this Article.

B. Strength of Support Assemblies: Where not indicated, select sizes of components so strength will be adequate to carry present and future static loads within specified loading limits. Minimum static design load used for strength determination shall be weight of supported components plus 200 lb (90 kg).

C. Mounting and Anchorage of Surface-Mounted Equipment and Components: Anchor and fasten electrical items and their supports to building structural elements by the following methods unless otherwise indicated by code:

1. To Wood: Fasten with lag screws or through bolts. 2. To New Concrete: Bolt to concrete inserts. 3. To Masonry: Approved toggle-type bolts on hollow masonry units and expansion anchor

fasteners on solid masonry units.



4. To Existing Concrete: Expansion anchor fasteners. 5. Instead of expansion anchors, powder-actuated driven threaded studs provided with lock

washers and nuts may be used in existing standard-weight concrete 4 inches (100 mm) thick or greater. Do not use for anchorage to lightweight-aggregate concrete or for slabs less than 4 inches (100 mm) thick.

6. To Steel: Welded threaded studs complying with AWS D1.1/D1.1M, with lock washers and nuts, Beam clamps (MSS Type 19, 21, 23, 25, or 27) complying with MSS SP-69 or Spring-tension clamps.

7. To Light Steel: Sheet metal screws. 8. Items Mounted on Hollow Walls and Nonstructural Building Surfaces: Mount cabinets,

panelboards, disconnect switches, control enclosures, pull and junction boxes, transformers, and other devices on slotted-channel racks attached to substrate.

D. Drill holes for expansion anchors in concrete at locations and to depths that avoid reinforcing bars.

3.3 PAINTING

A. Touchup: Clean field welds and abraded areas of shop paint. Paint exposed areas immediately after erecting hangers and supports. Use same materials as used for shop painting. Comply with SSPC-PA 1 requirements for touching up field-painted surfaces.

1. Apply paint by brush or spray to provide minimum dry film thickness of 2.0 mils (0.05 mm).

B. Touchup: Comply with requirements in paint specifications for cleaning and touchup painting of field welds, bolted connections, and abraded areas of shop paint on miscellaneous metal.

C. Galvanized Surfaces: Clean welds, bolted connections, and abraded areas and apply galvanizing-repair paint to comply with ASTM A 780.



RACEWAY AND BOXES FOR ELECTRICAL SYSTEMS 260533 - 1

SECTION 260533 - RACEWAY AND BOXES FOR ELECTRICAL SYSTEMS

PART 1 - GENERAL

1.1 SUMMARY

A. This Section includes raceways, fittings, boxes, enclosures, and cabinets for electrical wiring.


A. Electrical Components, Devices, and Accessories: Listed and labeled as defined in NFPA 70, Article 100, by a testing agency acceptable to authorities having jurisdiction, and marked for intended use.


PART 2 - PRODUCTS

2.1 METAL CONDUIT AND TUBING

A. Rigid Steel Conduit: ANSI C80.1.

B. IMC: ANSI C80.6.

C. EMT: ANSI C80.3.

D. FMC: Zinc-coated steel.

E. LFMC: Flexible steel conduit with PVC jacket.

F. Fittings for Conduit (Including all Types and Flexible and Liquidtight), EMT, and Cable: NEMA FB 1; listed for type and size raceway with which used, and for application and environment in which installed.

1. Conduit Fittings for Hazardous (Classified) Locations: Comply with UL 886. 2. Fittings for EMT: Steel, die-cast, compression type.

2.2 METAL WIREWAYS


1. Cooper B-Line, Inc. 2. Hoffman. 3. Square D; Schneider Electric.



B. Description: Sheet metal sized and shaped as indicated, NEMA 250, Type 1, unless otherwise indicated. All wireways exposed to the elements shall be Nema 250 Type 3R.

C. Fittings and Accessories: Include couplings, offsets, elbows, expansion joints, adapters, hold-down straps, end caps, and other fittings to match and mate with wireways as required for complete system.

D. Wireway Covers: Hinged type, Screw-cover type, or Flanged-and-gasketed type.

E. Finish: Manufacturer's standard enamel finish.

2.3 BOXES AND ENCLOSURES

A. Sheet Metal Outlet and Device Boxes: NEMA OS 1.

B. Cast-Metal Outlet and Device Boxes: NEMA FB 1, ferrous alloy or aluminum, Type FD, with gasketed cover.

C. Metal Floor Boxes: Cast metal, adjustable rectangular.

D. Small Sheet Metal Pull and Junction Boxes: NEMA OS 1.

E. Cast-Metal Access, Pull, and Junction Boxes: NEMA FB 1, cast aluminum or galvanized, cast iron with gasketed cover.

PART 3 - EXECUTION

3.1 RACEWAY APPLICATION

A. Outdoors: Apply raceway products as specified below, unless otherwise indicated:

1. Exposed Conduit: Rigid steel conduit 2. Concealed Conduit, Aboveground: Rigid steel conduit, IMC, EMT, RNC, or Type EPC-

40-PVC. 3. Underground Conduit: RNC, Type EPC-(40 or 80)-PVC, direct buried. 4. Connection to Vibrating Equipment (Including Transformers and Hydraulic, Pneumatic,

Electric Solenoid, or Motor-Driven Equipment): LFMC or LFNC. 5. Boxes and Enclosures, Aboveground: NEMA 250, Type 3R.

B. Comply with the following indoor applications, unless otherwise indicated:

1. Exposed, Not Subject to Physical Damage: EMT, ENT, or RNC. 2. Exposed, Not Subject to Severe Physical Damage: EMT, or RNC identified for such use. 3. Exposed and Subject to Severe Physical Damage: Rigid steel conduit. Includes raceways

in the following locations:

a. Mechanical rooms.



4. Concealed in Ceilings and Interior Walls and Partitions: EMT, ENT, RNC, or Type EPC-40-PVC.

5. Connection to Vibrating Equipment (Including Transformers and Hydraulic, Pneumatic, Electric Solenoid, or Motor-Driven Equipment): FMC, except use LFMC in damp or wet locations.

6. Damp or Wet Locations: Rigid steel conduit. 7. Raceways for Optical Fiber or Communications Cable: EMT. 8. Boxes and Enclosures: NEMA 250, Type 1, except use NEMA 250, Type 4, stainless

steel in damp or wet locations.

C. Minimum Raceway Size: 1/2-inch (16-mm) trade size.

D. Raceway Fittings: Compatible with raceways and suitable for use and location.

1. Rigid and Intermediate Steel Conduit: Use threaded rigid steel conduit fittings, unless otherwise indicated.

3.2 INSTALLATION

A. Comply with NECA 1 for installation requirements applicable to products specified in Part 2 except where requirements on Drawings or in this Article are stricter.

B. Keep raceways at least 6 inches (150 mm) away from parallel runs of flues and steam or hot-water pipes. Install horizontal raceway runs above water and steam piping.

C. Complete raceway installation before starting conductor installation.

D. Support raceways as specified in Division 26 Section "Hangers and Supports for Electrical Systems."

E. Arrange stub-ups so curved portions of bends are not visible above the finished slab.

F. Install no more than the equivalent of three 90-degree bends in any conduit run except for communications conduits, for which fewer bends are allowed.

G. Conceal conduit and EMT within finished walls, ceilings, and floors, unless otherwise indicated.

H. Raceway Terminations at Locations Subject to Moisture or Vibration: Use insulating bushings to protect conductors, including conductors smaller than No. 4 AWG.

I. Install raceway sealing fittings at suitable, approved, and accessible locations and fill them with listed sealing compound. For concealed raceways, install each fitting in a flush steel box with a blank cover plate having a finish similar to that of adjacent plates or surfaces. Install raceway sealing fittings at the following points:

1. Where conduits pass from warm to cold locations, such as boundaries of refrigerated spaces.

2. Where otherwise required by NFPA 70.



J. Expansion-Joint Fittings for RNC: Install in each run of aboveground conduit that is located where environmental temperature change may exceed 30 deg F (17 deg C), and that has straight-run length that exceeds 25 feet (7.6 m).

1. Install expansion-joint fittings for each of the following locations, and provide type and quantity of fittings that accommodate temperature change listed for location:

a. Outdoor Locations Not Exposed to Direct Sunlight: 125 deg F (70 deg C) temperature change.

b. Outdoor Locations Exposed to Direct Sunlight: 155 deg F (86 deg C) temperature change.

c. Indoor Spaces: Connected with the Outdoors without Physical Separation: 125 deg F (70 deg C) temperature change.

d. Attics: 135 deg F (75 deg C) temperature change.

2. Install fitting(s) that provide expansion and contraction for at least 0.00041 inch per foot of length of straight run per deg F (0.06 mm per meter of length of straight run per deg C) of temperature change.

3. Install each expansion-joint fitting with position, mounting, and piston setting selected according to manufacturer's written instructions for conditions at specific location at the time of installation.

K. Flexible Conduit Connections: Use maximum of 72 inches (1830 mm) of flexible conduit for equipment subject to vibration, noise transmission, or movement; and for transformers and motors.

1. Use LFMC in damp or wet locations subject to severe physical damage. 2. Use LFMC or LFNC in damp or wet locations not subject to severe physical damage.

L. Recessed Boxes in Masonry Walls: Saw-cut opening for box in center of cell of masonry block, and install box flush with surface of wall.

M. Set metal floor boxes level and flush with finished floor surface.
