installation guide - hvac · primary air temperature, discharge air temperature sensors: precon...

© 2013 Taco Electronic Solutions, Inc. 1

Installation Guide 502-046-2

VAVI-2 and VAVD-2 Terminal Unit ControllerSelf-Contained Interoperable Controller Model CMV for Software Version 2

SUPERSEDES: New EFFECTIVE: June 13, 2013Plant ID: 001-3959

SPECIFICATIONSElectrical InputsResolution: 10-bit Thermostat Network: 12 Volt nominal, internally limited to 0.04 APrimary Air Temperature, Discharge Air Temperature Sensors: Precon Type III 10K thermistor Indoor Air Quality: Analog Input 0-5 Volts DC

Electrical OutputsDigital Fan Start/Stop, Heating Stages 1 & 2 or Heating Valve Open & Close: 20 to 28 Volts AC, 0.7A maximum eachAnalog Fan, Modulated Heating Valve: 0 to 10 Volts DC, 2K Ohm minimum load, 8 bit resolution

PowerRequires: 24 VAC nominal, 100VA max (requires an external class 2 supply)Consumes: 15VA with no external loads, maximum limited by the class 2 supply rating

Recommended Sensor Wire Maximum Length: 500 feet (152 meters)

Recommended LON Bus FTT-10A Network WireSpeed: 78KBPSMax Volts: 42.4 Volts DC Cabling: Maximum node-to-node distance: 1312 feet (400 meters); Maximum total distance: 1640 feet (500 meters)

MechanicalDimensions: 5.0" (12.7 cm) high, 9.0" (22.9 cm) wide, 2.5" (6.4 cm) deep, ABS PolycarbonateController weight: 29 ounces (0.82 kilograms)Shipping weight: 40 ounces (1.1 kilograms)Processor: 3150 Neuron 10 MHzFlash: 48 Kilobytes

Cable Type Pairs Details Taco Catalog No.18AWG 1 Stranded Twisted Shielded Pair, Plenum WIR-018

Cable Type Pairs Details Taco Catalog No.Level 4 22AWG (0.65mm) 1 Unshielded, Plenum, U.L. Type CMP WIR-022

iWorx® VAV2 Series

2 502-046-2, Effective: June 13, 2013 © 2013 Taco Electronic Solutions, Inc.

SRAM: 8 Kilobytes Termination: 0.197” (5.0 mm) Pluggable Terminal Blocks, 14-22 AWGTemperature: 32 °F to 140 °F (0 °C to 60 °C)Humidity: 0 to 90%, non-condensing

Agency ListingsUL Listed for US and Canada, Energy Management Equipment PAZX and PAZX7.

Agency CompliancesFCC Part 15 Class A

Equipment LocationAbide by all warnings regarding equipment location provided earlier in this document.

Optimally, the equipment should be installed within a secure enclosure. If the equipment is to be installed outdoors, it must be contained within a protective enclosure. The enclosure must main-tain internal temperature and humidity within the ranges specified for this equipment.The equipment must be installed within 500 feet of all input peripherals (smoke detectors, sensors, etc.) that will be con-nected to the equipment.

Selecting a Power SourceThis equipment requires a UL recognized Class 2 external power source (not supplied) to operate. The controller power input requires a voltage of 24 Volts AC.To calculate power source current requirements, add the power consumption of all peripheral devices to that of the control-ler.The controller and triac output loads can use the same power source. If both are using the same power source, the loads must have EMF protection. This protection can be integral to the load, or installed in the 24 VAC wiring across the load’s coil.

To provide necessary RFI and transient protection, the controller’s ground (GND) pin (T8) must be connected to earth ground or the earth ground of the packaged unit’s enclosure ground. Failure to properly ground the controller may cause it to exceed FCC limits. Excessive noise could also produce inaccurate sensor data. The power source must be capable of operating with this connection to ground.

INSTALLATION PRECAUTIONSGeneral

This symbol is intended to alert the user to the presence of important installation and maintenance (servicing) instructions in the literature accompanying the equipment.WARNING: Electrical shock hazard. Disconnect ALL power sources when installing or servicing this equip-ment to prevent electrical shock or equipment damage.

Make all wiring connections in accordance with these instructions and in accordance with pertinent national and local elec-trical codes. Use only copper conductors.

Static ElectricityStatic charges produce voltages that can damage this equipment. Follow these static electricity precautions when handling this equipment.

• Work in a static free area.• Touch a known, securely grounded object to discharge any charge you may have accumulated.• Use a wrist strap when handling printed circuit boards. The strap must be secured to earth ground.

iWorx® VAV2 Series

502-046-2, Effective: June 13, 2013 3 © 2013 Taco Electronic Solutions, Inc.

LocationAvoid locations where corrosive fumes, excessive moisture, vibration or explosive vapors are present.Avoid electrical noise interference. Do not install near large contactors, electrical machinery, or welding equipment.This equipment is suitable for indoor or outdoor use. Preferably, or as required by National Electrical Code, the unit is intended to be installed within an electrical control enclosure. Operate where ambient temperatures do not exceed 122 °F (50 °C) or fall below 32 °F (0 °C) and relative humidity does not exceed 90%, non-condensing.

FCC ComplianceThis equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to Part 15 of the FCC rules. These limits are designed to provide reasonable protection against harmful interference. This equipment can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful inter-ference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures:

• Reorient or relocate the receiving antenna.• Increase the separation between the equipment and the receiver.• Connect the equipment to a power source different from that to which the receiver is connected.• Consult the equipment supplier or an experienced radio/TV technician for help.

You are cautioned that any changes or modifications to this equipment not expressly approved in these instructions could void your authority to operate this equipment in the United States.

INSTALLATIONWarning: Electrical shock hazard. To prevent electrical shock or equipment damage, disconnect ALL power sources to controllers and loads before installing or servicing this equipment or modifying any wiring.

Mounting the Device1.Open the damper halfway.2.Press the black motor release on the motor housing and rotate the actuator so that its flat edge is parallel to the edge

of the housing as shown in Figure 1.3.Slide the controller down over the damper shaft so that the shaft goes through the round opening above the actuator

motor.4.Tighten the retaining nuts to secure the actuator to the damper shaft.5.Remove tape that secures the mounting screw to the mounting tab at the left of the controller.6.Drive the mounting screw through the hole in the mounting tab and into the metal of the damper box.7.Set the motor stops to prevent the actuator motor from over driving the damper.

a.Rotate the damper shaft until the damper is completely closed.b.Loosen the screw that holds the low stop, and slide it around until it rests against the actuator.c.Tighten the screw to secure the low stop.d.Rotate the damper until it is completely open and set the high stop.

8.(VAVI-2) Attach the differential pressure sensor tubes from the duct to the inputs at the top of the controller. Attach the "Low" and "High" tubes to the "Low" and "High" attachment points on the controller.

9.Wire the controller (see ”Routing Cabling to the Device” below).

iWorx® VAV2 Series


Figure 1: Mounting Dimensions

Routing Cabling to the DeviceCabling used to connect the power source and cabling used to connect the FTT-10A network must remain sep-arated within the control enclosure and wiring conduit.

Grounding the DeviceThe ground terminal (T8) must be securely connected to earth ground. Failure to properly ground this equip-ment may increase the risk of electrical shock and the possibility of interference to radio/TV reception.For best performance, connect the power supply common terminal (T7) to the same external point as the ground terminal (T8).

WIRING INFORMATIONWARNING: Terminals 7, 12, 14, 17 and 20 are connected internally on all Terminal Unit Controller controllers. Disconnect ALL power sources when installing or servicing this equipment to prevent electrical shock or equipment damage.

iWorx® VAV2 Series


U Note: Factory installed jumper between terminal 17 & 18, IAQ Sensor. Remove the jumper when installing

analog CO2 Sensor.


analog CO2 Sensor.

iWorx® VAV2 Series



analog CO2 Sensor.


analog CO2 Sensor.

iWorx® VAV2 Series


Pressure Dependent or Independent VAV Box with Modulating, Floating Point or On/Off Staged ReheatSensors Required: Room Temp (Temp Only)Optional Sensors: Primary Air Temp, Discharge Air Temp, CO2

Setup Instructions 1.Press Controllers from main screen.

2.Select required VAV from controller list and pressappropriate controller.

3.Press All Settings.

4.Press Thermostat.

5.The Thermostat menu opens.a.Select Type of Thermostat. “Slink” indicates TS300

Series Stats; “Precon III” indicatesTS100 SeriesStats

b.Specify desired Occupancy Extension (TS300Series Only)

c.Specify Alarm Temperature Offset at which analarm is generated.

d.Specify Temperature Offset. This setting is a cali-bration of room temperature from a separate cali-brated device if required (Precon II or III Only).

e.Accumulated Ext Occ indicates the minutes ofoccupancy override of the VAV.

f. Press Save.

iWorx® VAV2 Series


6.Press Setpoints.

7.The Setpoints menu opens.a.Specify Setpoint.b.Specify Cooling Offset.c.Specify Heating Offset.d.Specify USER setpoint adjustable limits. Setting is

+- setpoint.e.Specify Unoccupied Cooling setpoint.f. Specify Unoccupied Heating setpoint.g.Press Save.

8.Press Damper Stuck.

9.The Damper Stuck menu opens.a.Specify time in Seconds that the damper is stuck

before alarm initiates.

b.Select amount of damper position error in % (Set-point) before alarm initiates.

c.Press Save.10.Press Press Dependent (VAVD only).

11.The Pressure Dependent menu opens.a.Specify damper Min Position in % open.b.Specify damper Max Position in % open.c.Specify Reheat Position in % open.d.Specify Fan Damper Position in % open.

OR12.Press Pressure Independent (VAVI only).

13.The Pressure Independent menu opens.a.Specify K Factor (from VAV box manufacturer).b.Specify Min Flow in CFM.

iWorx® VAV2 Series


c.Specify Max Flow in CFM.d.Specify Reheat Flow Setpoint in CFM.e.Specify Fan Flow Setpoint in CFM.f. Press Save.

If Pressure Independent, go to step 14. If Pressure Depen-dent, go to step 16.

14.Press Starved Box.

15.The Starved Box menu opens.a.Specify time in Seconds that the box is CFM

starved before alarm initiates.b.Specify amount of CFM flow error (Setpoint)

before alarm initiates.c.Press Save.

16.Press Local Reheat.

17.The Local Reheat menu opens.a.Select Local Heating Type:

-“Disabled” indicates no reheat-“Floating Point” or “Modulating (0-10VDC)” indicates controlled reheat-“1 Stg” - One on/off stage of reheat-“2 Stg” - Two on/off stages of reheat

b.Specify Control Band in Degrees.c.Specify Valve Travel Time in seconds (Note: Only

insert time if utilizing a Floating Point Valve).d.Specify Runtime Limit in Hours before box service

alarm is initiated (Set to 63000 Hrs to effectivelyeliminate alarm).

e.Specify Valve AO Min (Output) Voltage (0-10VDC). 2.0 VDC is typical.

f. Specify Valve AO Max (Output) Voltage (0-10VDC). 10.0 VDC is typical.

g.Press Save.18.Press Damp Ctl. Band.

19.The Damper Ctl. Band menu opens.a.Specify Damp Ctl Band in degrees. The damper

control band is the temperature differential from SPthat the actuator will be at Damper Min % of flow toDamper Max % of flow.

b.Press Save.

iWorx® VAV2 Series


Pressure Dependent or Independent Parallel or Series Fan Powered VAV Box with Modulating, Floating Point or ON/OFF Staged ReheatSensors Required: Room Temp (Temp Only)Optional Sensors: Primary Air Temp, Discharge Air Temp, CO2Complete steps 1-19 above.




4.Press Next 3 (VAVD) or Next 4 (VAVI).5.Press Fan Settings.

6.The Fan Settings menu opens.a.Select Fan Type:

-“Disabled”: no fan-“Series Fan Powered Box”-“Parallel Fan Powered Box (Temp Based)”-“Parallel Fan Powered Box (CFM Based)”

b.Press Save.

iWorx® VAV2 Series


Pressure Dependent or Independent VAV Box with Modulating, Floating Point or On/Off Staged Reheat and CO2 Demand Controlled VentilationSensors Required: Room Temp (Temp Only), CO2Optional Sensors: Primary Air Temp, Discharge Air TempComplete steps 1-19 above.




4.Press Indoor Air Quality.

5.The Indoor Air Quality menu opens.a.Specify IAQ Delay Time in minutes.b.Specify Temp Reset Limit in degrees.c.Press Save.

6.Press All Settings.7.Press System Options.

8.The System Options menu opens.a.Select Local IAQ Alarm value.b.Select Global IAQ Alarm value.c.Select Display IAQ Alarm “ON” if the VAV should

sense the alarm.d.Press Save.

iWorx® VAV2 Series


Pressure Dependent or Independent VAV Box with Baseboard or Radi-ant Infloor Heat as First Stage Heat (HVAC System Second Stage Heat)Sensors Required: Room Temp (Temp Only)ASM2 Control Module Required for Warm Weather Shutdown feature. Optional Sensors: Primary Air Temp, Discharge Air Temp, CO2




4.Press System Options.

5.The System Options menu opens.a.Select Aux Heating Mode “ON.”b.Press Save.

6.Press Fan Settings.

iWorx® VAV2 Series


7.The Fan Settings menu opens.a.Select Fan Type: “Parallel Fan Powered Box

(Temp Based)”b.Press Save.

If Radiant Infloor Heat, continue to Step 9.8.Press WWSD (Warm Weather Shutdown).

9.The WWSD (Warm Weather Shutdown) menuopens.a.Specify Outside Air Temperature in degrees for

shutdown of radiant infloor heat as first stage heat.b.Press Save.

10.Press Local Reheat.

11.The Local Reheat menu opens.a.Specify Valve Travel Time in seconds (Note: Only

insert time if utilizing a Floating Point Valve). This

value specifies the amount of time delay before notifying the primary air source that there is a heat-ing demand.

b.Specify Valve AO Min (Output) Voltage (0-10VDC). 2.0 VDC is typical.

c.Press Save.

iWorx® VAV2 Series


TROUBLESHOOTINGDiagnostic LEDsThe controller has 4 LED indicators. These indicators can aid in troubleshooting equipment operation problems. The follow-ing table lists the functions of the controller’s LEDs in the order they appear from left to right on the unit.

Figure 2: Terminal Unit Controller Controller LEDs

Troubleshooting TipsThe following table provides tips on resolving common issues.

LED IndicationStatus – Solid green when running and configured by an LCI

– Flashing green when running and NOT configured by an LCINetwork – Yellow while the controller is transmitting data onto the FTT-10A network

– Green when there is network activity– Off when there is no network activity

Fault – Solid red when a fault condition existsService – Illuminated when the service pin is pushed

Problem SolutionController is not running and Status LED is not illuminated.

No power to controller. Verify the voltage on the controller’s power connector (24 VAC).

How do I reset the controller? The controller can be reset by the LCI, or you can cycle power to the controller. Refer to the LCI documentation for more information on resetting the controller using the LCI.

I am using a TS303 thermostat and cannot force the fan ON.

On the VAV2 Series controller, the Fan Override button is disabled. Model TS303 is not recommended for use with VAV2 Series controllers.

On other iWorx® controllers, the sta-tus LED will turn Red when the con-troller has entered a fault mode that requires a reset. Are there any such modes on the VAV2 Series?

Yes, but it doesn't require a reset. As with any of the controllers, if the controller detects that no TS300 series sensor is present, an alarm is issued, the controller enters fault mode, and the LED is turned red. However, this type of failure doesn't require a manual reset.

Can VAV2 Series controllers have independent schedules?

Yes, each VAV2 Series controller on the network can be part of a different LCI group containing a different schedule. Remember the LCI is limited to 16 groups and 16 schedules.

What is the maximum number of VAV2 Series controllers that the LCI can support?

Since VAV2 Series controllers require either a VPU2 or MPU2 controlling the air-han-dling unit, the LCI can support up to 32 VAVD controllers per MPU2 and up to 60 VAVI controllers per VPU2. Remember the LCI can only support a maximum of 63 control-lers.

iWorx® VAV2 Series


Getting HelpComponents within an iWorx® controller, sensor, or power supply cannot be field repaired. If there is a problem with a unit, follow the steps below before contacting your local TES representative or TES technical service.

1.Make sure controllers, sensors, and power supplies are connected and communicating to desired devices.2.Record precise hardware setup indicating the following:

Version numbers of application software.Device and/or firmware version number.A complete description of difficulties encountered.

REPRESENTATIONS AND WARRANTIESThis Document is subject to change from time to time at the sole discretion of Taco Electronic Solutions, Inc. All updates to the Document are available at www.taco-hvac.com. When installing this product, it is the reader’s responsibility to ensure that the latest version of the Document is being used. iWorx® products shall only be used for the applications identified in the product specifications and for no other purposes. For example, iWorx® products are not intended for use to support fire suppression systems, life support systems, critical care applications, commercial aviation, nuclear facilities or any other applications where product failure could lead to injury to person, loss of life, or catastrophic property damage and should not be used for such purposes.Taco Electronic Solutions, Inc. will not be responsible for any product or part not installed or operated in conformity with the Document and instructions or which has been subject to accident, disaster, neglect, misuse, misapplication, inadequate operating environment, repair, attempted repair, modification or alteration, or other abuse. For further information, please refer to the last page of this Document for the company’s Limited Warranty Statement, which is also issued with the product or available at www.taco-hvac.com.

When will the damper be controlled to the minimum flow value?

The damper will be controlled to the minimum flow value when the space temperature is satisfied.

Is there any provision for an air bal-ancer to override the VAV box damper?

Yes, using the LCI there is a mode that an air balancer can manipulate the damper or set it to maintain a specified flow.

My VAV2 Series boxes are not enter-ing heating or cooling mode.

Have the controllers been grouped with an VPU2 or MPU2? Have you sent the group-ing information to the controllers?

My temperature and flow readings are fluctuating rapidly.

Verify that the VAV2 Series is properly grounded. There must be a wire jumper between terminals T7 and T8.

Problem Solution

iWorx® VAV2 Series


APPLICABLE DOCUMENTATIONSee the table below for additional documentation that may be applicable to this controller.

Notes:

Description Audience PurposeiWorx® LCI2 Application Guide, Doc-ument No. 505-002

iWorx® LCI3 Application Guide, Doc-ument No. 505-050

– Application Engineers– Installers– Service Personnel– Start-up Technicians– End user

Provides instructions for setting up and using the iWorx® Local Control Interface.

iWorx® VAV2 Series Application Guide, Document No. 505-046-2


Provides instructions for setting up and using the iWorx® VAV2 Series controllers.

iWorx® VPU2 Application Guide, Document No. 505-010


Provides instructions for setting up and using the iWorx® VPU controller.

iWorx® MPU2 Application Guide, Document No. 505-009


Provides instructions for setting up and using the iWorx® MPU controller.

iWorx® TS100 Series Installation Guide, Document No. 502-015


Provides instructions for installing and using the iWorx® TS100 Series sensors.

iWorx® TS300 Series Installation Guide, Document No. 502-017


Provides instructions for installing and using the iWorx® TS300 Series sensors.

http://www.iWorxWizard.com – Application Engineers– Wholesalers– Contractors

An on-line configuration and submittal package generator based on user input. Automatically generates bill of materials, sequence of opera-tions, flow diagrams, wiring diagrams, points and specifications.

Additional Documentation

LonWorks FTT-10A Free Topology Transceiver User’s Guide, published by Echelon Corpo-ration. It provides specifications and user instructions for the FTT-10A Free Topology Trans-ceiver. See also: www.echelon.com/support/documentation/manuals/transceivers.

iWorx® VAV2 Series


iWorx® VAV2 Series

Printed in the USA iWorx® and iView® are registered trademarks of Taco Electronic Solutions, Inc. © 2013 Taco Electronic Solutions, Inc. LON, LONWORKS, & LONMARK are trademarks of Echelon Corporation

CONTROLS MADE EASY®

Taco Electronic Solutions, Inc., 1160 Cranston Street, Cranston, RI 02920 Telephone: (401) 942-8000 FAX: (401) 942-2360.Taco (Canada), Ltd., 8450 Lawson Road, Unit #3, Milton, Ontario L9T 0J8. Telephone: 905/564-9422. FAX: 905/564-9436.Taco Electronic Solutions, Inc. is a subsidiary of Taco, Inc. Visit our web site at: http://www.taco-hvac.com

Taco Electronic Solutions, Inc. (TES) will repair or replace without charge (at the company's option) any product or part which is proven defective under normal use within one (1) year from the date of start-up or one (1) year and six (6) months from date of shipment (whichever occurs first).

In order to obtain service under this warranty, it is the responsibility of the purchaser to promptly notify the local TES stocking distributor or TES in writing and promptly deliver the subject product or part, delivery prepaid, to the stocking distribu-tor. For assistance on warranty returns, the pur-chaser may either contact the local TES stocking distributor or TES. If the subject product or part contains no defect as covered in this warranty, the purchaser will be billed for parts and labor charges in effect at time of factory examination and repair.

Any TES product or part not installed or operated in conformity with TES instructions or which has been subject to accident, disaster, neglect, mis-use, misapplication, inadequate operating envi-ronment, repair, attempted repair, modification or alteration, or other abuse, will not be covered by this warranty.

TES products are not intended for use to support fire suppression systems, life support systems, critical care applications, commercial aviation, nuclear facilities or any other applications where product failure could lead to injury to person, loss of life, or catastrophic property damage and should not be sold for such purposes.

If in doubt as to whether a particular product is suitable for use with a TES product or part, or for any application restrictions, consult the applica-ble TES instruction sheets or in the U.S. contact TES at 401-942-8000 and in Canada contact Taco (Canada) Limited at 905-564-9422.

TES reserves the right to provide replacement products and parts which are substantially similar in design and functionally equivalent to the defective product or part. TES reserves the right to make changes in details of design, construc-tion, or arrangement of materials of its products without notification.

TES OFFERS THIS WARRANTY IN LIEU OF ALL OTHER EXPRESS WARRANTIES. ANY WARRANTY IMPLIED BY LAW INCLUDING WARRANTIES OF MERCHANTABILITY OR FITNESS IS IN EFFECT ONLY FOR THE

DURATION OF THE EXPRESS WARRANTY SET FORTH IN THE FIRST PARAGRAPH ABOVE.

THE ABOVE WARRANTIES ARE IN LIEU OF ALL OTHER WARRANTIES, EXPRESS OR STATUTORY, OR ANY OTHER WARRANTY OBLIGATION ON THE PART OF TES.

TES WILL NOT BE LIABLE FOR ANY SPE-CIAL, INCIDENTAL, INDIRECT OR CONSE-QUENTIAL DAMAGES RESULTING FROM THE USE OF ITS PRODUCTS OR ANY INCI-DENTAL COSTS OF REMOVING OR REPLAC-ING DEFECTIVE PRODUCTS.

This warranty gives the purchaser specific rights, and the purchaser may have other rights which vary from state to state. Some states do not allow limitations on how long an implied warranty lasts or on the exclusion of incidental or conse-quential damages, so these limitations or exclu-sions may not apply to you.

LIMITED WARRANTY STATEMENT

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