terra-therm inc. variable speed fan coil installation...

Terra-Therm Inc. Variable Speed Fan Coil Installation/Operation Manual

Models Vara-Therm 24, Vara-Therm 36, Vara-Therm 60 M1-7205 M1-7310 M1-7515

Phone: (507) 463-3213 New Richland, MN

\\Tt\common\Assemblies\Fan Coils\Summit Variable Speed\M1-7205\TTI Info 1

GENERAL INFORMATION This single piece variable speed air handler provides the flexibility for installation in any up flow, down flow, or horizontal application. The ECM variable speed blower motors provide a selection of air volume to match different applications. The three models provide air flow ranging from 300 – 2000 CFM. The unit can be positioned for bottom return air in the up flow position, top return air in the down flow position and end return air in the horizontal position. NOTE: For down flow installation the water coil, water coil supports, and water coil front panels will need to be removed and installed in the fan coil cabinet after it has been set with the blower in the down flow position. INSPECTION As soon as the unit is received, it should be inspected for visible and possible invisible damage during transit. If damage is evident, the extent of the damage should be noted on the carrier’s delivery receipt. A separate request for inspection by the carrier’s agent should be made in writing. Contact carrier for more information. Terra Therm Inc. assumes no liability for freight damage. Installation of accessories or field conversion should be accomplished before setting the unit in place or connecting any wiring, electric heat, or piping. REFERENCE This instruction should be used in conjunction with instructions supplied with each field installed accessory. Installer should pay particular attention to the words: NOTE, CAUTION, and WARNING. NOTES are intended to clarify or make the installation easier. CAUTION identifies procedure which, if not followed carefully, could result in personal injury, property damage or product damage. WARNING is given to alert the installer that severe personal injury, death, or equipment damage may result if installation procedures are not handled properly. LIMITATIONS These units must be wired and installed in accordance with all national and local codes. Voltage limits are as follows. Air Handler Voltage Normal Operating Voltage Code Voltage Range

208/230/60/1 B 187 - 253

LOCATION Location is usually predetermined. Check with owner’s or dealer’s installation plans. If location has not been decided, consider the following in choosing a suitable location.

1. Select a location with adequate structural support, space for service access, clearance for return and supply connections. It is generally best if the fan coil can be installed near the center of the structure so supply and return air ducts can be installed in both directions.

NOTE: Service access is generally specified by local codes. 2. Normal operating sound levels may be

objectionable if the air handler is placed directly over or under rooms such as bedrooms, study, etc.

3. Precautions should be taken to locate the unit and duct work so that supply air does not short circuit to the return air.

4. Select a location that will permit installation of condensate drain line to an open drain.

NOTE: When the water coil is installed in a negative air chamber, it is recommended to trap the primary and secondary drain line. If the secondary drain is not used, it must be capped. 5. When the water coil is installed in an attic or above

a finished ceiling, an auxiliary drain pan must be provided under the coil as is specified by most local building codes.

6. Proper electrical supply must be available. 7. Clearances must also be taken into consideration,

and provided for as follows. a. Water piping and connections are located in the

front. b. Maintenance and servicing through the front

access side of the unit with both sides and rear of the unit having zero clearances.

c. Condensate drain lines are not installed in front of the air filter access door.

CAUTION If electric heat is used, a minimum clearance of 1” must be maintained on all sides of the supply air Duct a nd or plenum continuously for up to 3’

INSTALLATION/OPERATION SAFETY RULES:

1. Read these rules and instructions carefully. Failure to follow these rules and the installation instructions could cause a malfunction of the unit, and a possible safety hazard. Keep these instructions nearby the unit for future reference.

2. While this unit has been designed and manufactured to comply with National Codes, it is the installer’s responsibility to install this unit to comply with National Codes and/or prevailing Local Codes and regulations. Terra-Therm assumes no





responsibility for units installed in violation of any code or regulation.

3. Before servicing, allow unit to cool. WARNING ALWAYS SHUT OFF ELECTRICITY WHEN WORKING ON UNIT. This will prevent any electrical shocks or burns.

4. Ground the unit to prevent electric shock. All electrical wiring should be in accordance with the National Electrical Code.

5. Duct work must be installed in accordance with the standards of the National Fire Protection Association (NFPA) for the installation of Air Conditioning, Warm Air Heating and Ventilating Systems (NFPA 90A and 90B). Duct work in non-conditioned spaces must be insulated to prevent formation of condensate or the loss of heat for maximum efficiency.

6. The safety testing agency label appearing on these units covers the unit and factory installed coil (if provided) only. It does not cover any other equipment. Exterior surface of cabinet may sweat when unit is installed in a non-conditioned space such as an attic or garage. Installer must provide protection such as full size auxiliary drain pan on all units installed in a non-conditioned space to prevent damage from condensation runoff. It is recommended that units installed in non-conditioned spaces be insulated with 1” thick fiberglass with a vapor barrier on the outside.

7. While designed to operate quietly when properly installed, several steps should be taken to insure this. Be sure the return air box has adequate internal supports for the weight of the fan coil. When mounting the unit, use flexible duct collars for return and supply duct work. The use of acoustical duct liners are all good installation practices that promote quiet operation.

8. Cabinet insulation is rated for R-4.2 (standard). Some jurisdictions require R-6.0 on installations in a non-conditioned space. Add insulation 1” thick to exterior of unit to comply in these jurisdictions, putting the vapor barrier on the outside.

WARNING:

Hot water can scald. Water heated to a temperature which will satisfy space heating can scald and permanently injure a person upon contact. Some people are more likely to be permanently injured by hot water than others. These include the elderly, children, the infirmed, physically or mentally handicapped. Check Local, State, and National Codes requiring certain temperature water at the hot water tap. Special precautions must be used in addition to using lowest possible temperature setting that

satisfies your hot water needs. A tempering device such as a mixing valve should be used at the hot water taps, or water heater.

UNPACKING THE UNIT: The unit should be unpacked on receipt and if any damage is found, follow the instructions under “INSPECTION” on page 1. This air handler is completely assembled. Only electrical power, thermostat wiring, hot/chilled water piping, condensate drain piping, air filter and duct connections are needed for installation. Some units may have motor supports over the motor shaft. Remove these supports as necessary. MINIMUM CLEARENCES: These units have a 0” minimum clearance to combustible materials rating from all cabinet surfaces. The unit should be installed with serviceability clearance of 30” from the front of the unit. The unit can be serviced entirely from the front. Be sure to install filter so it is easily serviced. Install the hot/chilled water and condensate drain piping so that it does not obstruct replacement of the air filter. ARRANGEMENT: Unit is shipped from the factory arranged to be installed in a vertical upflow or horizontal right to left air flow position (standard) or field convertible to a horizontal left to right air flow or downflow position. UPFLOW APPLICATION: In an upflow installation the discharge outlet is at the top. Care should be taken to insure unit is level to permit proper condensate drainage. Normal upflow installation will be in a closet or basement. This unit must be installed on a Return Air Support Box sized correctly for the units operational CFM. The air filter is often installed in this air box. Install all supply and return duct work in accordance with Local Codes. HORIZONTAL APPLICATION: Horizontal applications will normally be used in an attic or crawl space. This type of installation requires a return air duct with filter rack attached to the inlet. Attach a plenum to the discharge of the unit. The unit is shipped in a right to left configuration. For left to right application the conversion should be completed before setting the fan coil. 1. Remove the water coil doors, horizontal drain pan

retainer clips, water coil positioning bracket and the water coil.

2. Flip the horizontal drain and place it on the right side of the water coil.





3. Reinstall the water coil sitting in the horizontal drain pan, using the water coil positioning bracket and the horizontal drain pan retainer clips fasten the horizontal drain pan to the right side of the cabinet.

4. Be sure all unused condensate drain ports are plugged.

5. Reinstall the water coil doors, making sure all unused openings in the doors are sealed since the water coil is in a negative pressure air chamber.

CAUTION: It is mandatory to use an emergency auxiliary drain pan with any water coil or air handler installed in an attic or above a finished ceiling. DOWNFLOW APPLICATION: If this unit is to be used in a downflow application, the conversion should be completed before setting the fan coil. See Chilled/Hot Water Piping for alternate plumbing.

1. Remove the water coil doors, horizontal drain pan

retainer clips, water coil positioning bracket and the water coil.

2. Remove the water coil support rails from the bottom right and left sides of the cabinet. The rear coil support rail is interlaced with the side rails.

3. Turn the fan coil cabinet so the discharge is now pointing down.

4. Install the water coil support rails removed from the bottom of the cabinet using the holes provided so that the water coil can be mounted with the drain pan close to the blower. The horizontal drain pan can be discarded in this application.

5. Install the water coil, water coil positioning bracket, and the water coil doors lining up the condensate drain holes with the condensate ports in the drain pan. Plug all unused condensate drain ports.

6. Be sure all unused openings in the doors are sealed since the water coil is in a negative pressure air chamber.

7. Downflow Plumbing: When the fan coil is installed in a downflow application the water coil is reversed in its relationship to the blower. The water flow will need to be reversed as well. The inlet pipe is now the

upper or (CWR) port and the outlet pipe is now the lower (CWS) port.

ELECTRICAL WIRING: Refer to the unit nameplate for specific electrical data. CAUTION: Disconnect power at main fuse or circuit breaker distribution panel before wiring unit to prevent shock or fire hazard.

POWER WIRING: Unit is suitable for use with copper conductors. Tighten all wire connectors. Take care not to damage heater ceramic insulators on electric heat modules. For correct field wire size, see unit nameplate and field wiring table inside electrical compartment door. Use 75 º C minimum wires in unit wiring compartment. Units larger than 10 KW will require multiple sets of power conductors. NOTE: See unit for complete wiring diagram located

on the blower housing. CONTROL WIRING: Field connections to the low voltage leads are made using appropriate field supplied wiring connectors. Consult installation instructions provided with accessory items for specific information on control wiring. Use 18 AWG minimum copper conductors for control wiring up to 50’ between units. 16 AWG control conductors are recommended for lengths between 50’ and 100’. Class 2 wiring is acceptable. Take care not to short control leads; transformer burnout could result.

Control Board Legend: G – Constant Fan Y1 - Speed Y2 – Speed O – NA W1 – Speed/Electric Heat EM – Speed CI – Common R – 24 Vac HUM – Humidifier Control





LOW VOLTAGE WIRING: The M1-7205, 7310, 7515 have a 40 VA transformer producing 24Vac to power the low voltage controls. This transformer is terminated on the “R” and “CI” terminals of the ECM control Board. The “R” and “CI” terminals also provide power to the low voltage control device. If this low voltage control device is the Terra-Therm M1-0152 Hydronic Control Module the “R” and “CI” terminals on the ECM control board will be connected to the “R” & “C” terminals on the corresponding fan coil terminal block in the Hydronic Control Module. “W1” & “EM” ECM Control Board Terminals The M1-7205, 7310, 7515 fan coils come with the electric heat wired to the “W1” ECM Control Board terminal. For first stage hydronic heat the “W1” terminal from the controlling thermostat in the M1-0152 Hydronic Control Module Board will be connected to the “EM” terminal of the ECM control board. For second stage heat the “W2” terminal in the Hydronic Control Module will connect to the “W1” terminal of the ECM control board. Second stage heat is electric resistance heaters to boost the output of the fan coil. In the case of an emergency the second stage heat call from the thermostat will provide electric resistance heat for the structure. “Y1” & “Y2” ECM Control Board Terminals “Y1” & “Y2” are considered cooling speed terminals. A 24 volt signal supplied to either terminal will ramp the blower to the CFM described in Table 3 found on page 8 of the manual. When using the M1-0152 Hydronic Control Module the “Y” terminal from the controlling thermostat will be connected to the “Y1” or “Y2” terminal on the ECM Control Board. “G” ECM Control Board Terminal The “G” is the constant speed terminal and will be connected directly to the “G” terminal of the controlling device. If the M1-0152 Hydronic Control Module is used the “G” terminal would be connected to the “G” terminal on the corresponding fan coil terminal block. “HUM” ECM Control Board Terminal Terra-Therm suggests that the COOL jumper be set for the proper speed to achieve the dehumidification and CFM cooling without using the “HUM” Terminal. Do not cut the “CUT TO ENABLE” resistor or the ECM blower will run slower than the programmed CFM. COOL, HEAT, & ADJUST Jumpers ECM Control Board The COOL jumper controls “Y1”, “Y2”, & “G” blower speeds. The HEAT jumper controls “W1” & “EM” blower speeds. The COOL and HEAT jumpers do not need to be in the same position. The ADJUST jumper will

provide +/- 12% speed adjustment for the entire ECM Control Board.

VARIABLE SPEED BLOWER MOTOR: Electronic commutated motors are factory programmed and cannot be re-programmed in the field. ECM motors have 4 jumper settings for cool modes and 4 jumper settings for heat modes, and a normal or +/- 12% global setting. Refer to blower performance data in Table 3 for selection of jumper or tap settings that best fit the application. NOTE: All 208/230 volt motors are factory programmed for “0” second fan “ON” delay for use with electric heat. Motor must energize with electric heat. “CFM” LED on the ECM Control Board The operating CFM can be verified by counting the number of times the CFM LED blinks during each complete cycle. There will be a pause between each cycle of blinks. The number of blinks during each complete cycle X 100 = operating CFM. CHILLED/HOT WATER PIPING: NOTE: Always use Best Practice plumbing techniques when connecting this fan coil to the hydronic system. Use only copper or Pex piping. If Pex is used it must be one size larger, (example 1” copper or 11/4” pex). Terra-Therm’s conceptual plumbing diagrams are a very good resource. All piping must be supported independent of the water coil to prevent vibration and stress on coil headers. Swing joints or flexible fittings must be provided to absorb expansion and contraction strains. Rigid piping reduces the effectiveness of vibration isolators. Water piping should always be connected so that the entering water is on the discharge air side of the coil. In the Upflow or Horizontal flow applications the water coil supply (CWS) inlet pipe is closest to the bottom of the air handler, and the (CWR) outlet pipe is closest to the top. (CSW – Chilled Water Supply, CWR – Chilled Water Return) Downflow Plumbing: When the fan coil is installed in a downflow application the water coil is reversed in its relationship to the blower. The water flow will need to be reversed as well. The inlet pipe is now the upper or (CWR) port and the outlet pipe is the lower (CWS) port. It is recommended that any devices installed, which could create a closed system, have an expansion tank to relieve the pressure built up by thermal expansion in the water system. After piping has been installed, allow the system to fill with water and check connections for leaks. To insure complete filling of the system, follow start-up procedures.





WARNING Air handler must be located so that if any connections should leak, hydronic fluid or water wi ll not cause damage to the adjacent area. When such locations can’t be avoided, a suitable drain pan should be installed under the air handler. The drai n pan should be over 1 1/2” deep, with a minimum length and width at least 2” greater than the air handler dimensions and connected to an adequate drain. Under no circumstances is the manufacturer to be held libel for any water damage in connection with this air handler.

WARNING Toxic chemicals such as used for treatment of boilers or non-potable water heating appliances shall never be introduced into a potable water spac e heating system.

WARNING When the system requires water at temperatures higher than required for other uses, a means such as a mixing valve shall be installed to temper the water for those uses in order to reduce the scald hazard potential CONDENSATE DRAIN PLUMBING: The air handler “A” coil drain pan has two ¾” NPT female primary and secondary connections (left and right hand). The horizontal pan has two ¾” NPT female connections, one primary and one secondary. Field supplied piping from each fitting used is to have a 6” minimum trap and run in such a manner as to provide enough slope for adequate drainage to a visible area. If the secondary condensate drain is used, do not pipe the primary and secondary condensate drains together into a common line. Cap or plug any unused port in the coil and horizontal drain pans.

AIR FILTER: A clean appropriately sized filter must be used or system damage will occur. The air filter and filter rack ARE NOT supplied with this air handler. An approatie sized air filter for each of the following units: M1-7205 Max Air 16” X 20” M1-7310 Max Air 20” X 20” M1-7515 Max Air 20” X 25” CHECK TEST AND START UP: This unit should be tested after the system has been completely installed to determine proper operation. Unit is equipped with heater relay controls. All heating elements will turn on immediately with a call. NOTE: Circuit breakers are equipped with a visual “visi-trip” red flag indicator. If red indicator shows th at a circuit breaker has tripped, this indicates that a problem exists in your system which should be corrected before resetting breaker. NOTE: Hydronic system should not be switched on until system is filled and the chilled/hot water co il is vented. 1. Vent and flush all hydronic lines

The easiest way to vent the water coil is with a P/T port stab used with a pressure gauge.

2. Fill and pressurize the hydronic system with soft water and propylene glycol.

3. Energize the unit by switching on the line voltage source.

Heating: 4. Set the thermostat to produce a call for heat. The

blower and circulator pump should start. 5. The fan coil should be heating as soon as warm

glycol & water is circulated through the water coil 6. Raise the thermostat enough to call second stage,

and electric heat should come on. Cooling: 7. Set the thermostat to produce a call for cooling.

The blower and circulator pump should start. 8. The fan coil should be cooling as soon as chilled

glycol & water is circulated through the water coil. Finish Test: 9. Reset the thermostat to a mode appropriate for the

season. PERIODIC MAINTENANCE: The filter must be changed or cleaned monthly to permit proper airflow for safe and efficient operation. Other service should be performed by a licensed technician.





TABLE 1

Heating Performance Data: Variable Speed Fan

Coil Model # Heating Capacities @

70º F Entering Air Temperature Chilled Water

Coil Part # Entering Water Temperature

100º F 105º F 110º F 115º F CFM GPM

Pressure Drop Water

(FT-WTR)

Pressure Drop Air

(WC) 11,767 13,746 15,728 17,714 2.0 1.6 12,439 14,521 16,604 18,689 4.0 3.3 12,603 14,709 16,816 18,924

400 6.0 6.5

0.03

15,627 18,268 20,917 23,575 2.0 1.6 17,591 20,546 23,505 26,469 4.0 3.3 18,143 21,182 24,224 27,269

600 6.0 6.5

0.06

18,305 21,407 24,521 27,645 2.0 1.6 21,880 25,567 29,263 32,966 4.0 3.3 23,016 26,881 30,752 34,630

800 6.0 6.5

0.10

19,329 22,607 25,897 29,199 2.0 1.6 23,737 27,742 31,757 35,783 4.0 3.3

M1-7205 VARA-

THERM 24

M1-5022 CW024A8K3-44A

16 x16, 4 Row, 8 Circuits,

16 FP/circuit 25,216 29,455 33,703 37,958

900 6.0 6.5

0.13

23,145 27,034 30,931 34,834 5.0 3.9 23,852 27,851 31,855 35,864 7.0 6.5 24,211 28,265 32,323 36,385

800 9.0 10.2

0.08

27,351 31,959 36,578 41,208 5.0 3.9 28,574 33,375 38,184 43,001 7.0 6.5 29,216 34,116 39,023 43,936

1000 9.0 10.2

0.11

30,962 36,190 41,482 46,688 5.0 3.9 32,783 38,302 43,832 49,374 7.0 6.5 33,767 39,440 45,723 50,815

1200 9.0 10.2

0.15

34,069 39,829 45,610 51,408 5.0 3.9 36,535 42,695 48,871 55,062 7.0 6.5

M1-7310 VARA-

THERM 36

M1-5023 CW036A8K5-45A 20 x 16, 4 Row,

10 Circuits, 16 FP/circuit

37,903 44,281 50,672 57,074 1400

9.0 10.2 0.19

35,150 41,050 46,960 52,878 8.0 5.2 35,815 41,818 47,828 53,846 10.0 7.6 36,382 42,472 48,568 54,669

1200 13.0 12.3

0.07

39,642 46,307 52,985 59,674 8.0 5.2 40,628 47,447 54,277 61,117 10.0 7.6 41,484 48,436 55,396 62,364

1400 13.0 12.3

0.09

43,731 51,093 58,472 65,866 8.0 5.2 45,083 52,659 60,250 67,854 10.0 7.6 46,275 54,034 61,813 69,597

1600 13.0 12.3

0.12

47,450 55,447 63,468 71,505 8.0 5.2 49,202 57,481 65,776 74,089 10.0 7.6 50,770 59,297 67,837 76,391

1800 13.0 12.3

0.14

50,836 59,415 68,018 76,643 8.0 5.2 53,010 61,939 70,889 78,859 10.0 7.6

M1-7515 VARA-

THERM 60

M1-5025 CW060A9K9-18A 28 x 17.5, 4 Row,


54,987 64,230 73,491 82,767 2000

13.0 12.3 0.17

16 FP/circuit, means there is 16 flow paths through the water coil for each circuit





TABLE 2 Cooling Performance Data:

Variable Speed Fan Coil Model #

Cooling Capacities @ Entering Water Temperature

75ºF / 63ºF / 45ºF 75ºF / 63ºF / 42ºF Chilled Water Coil Part # Total Sensible Total Sensible CFM GPM

Pressure Drop Water

(FT-WTR)

Pressure Drop Air

(WC) 13,515 10,458 15,302 11,272 2.0 1.6 16,328 11,680 18,573 12,766 4.0 3.3 17,343 12,223 19,726 13,310

400 6.0 6.5

0.06

16,328 13,939 18,320 14,747 2.0 1.6 20,937 15,959 23,862 17,373 4.0 3.3 23,203 16,969 26,406 18,586

600 6.0 6.5

0.12

18,281 17,069 20,390 17,869 2.0 1.6 24,375 19,736 27,617 21,069 4.0 3.3 27,578 21,069 31,406 22,669

800 6.0 6.5

0.19

18,532 18,532 21,250 19,400 2.0 1.6 25,781 21,191 29,140 22,683 4.0 3.3

M1-7205 VARA-

THERM 24

M1-5022 CW024A8K3-44A

16 x16, 4 Row, 8 Circuits,

16 FP/circuit 29,375 22,982 33,437 24,773

900 6.0 6.5

0.24

27,207 20,970 30,858 22,583 5.0 3.9 29,765 22,045 33,876 23,927 7.0 6.5 31,365 22,852 35,703 24,734

800 9.0 10.2

0.13

30,468 24,670 34,531 26,337 5.0 3.9 33,906 26,003 38,593 28,003 7.0 6.5 36,093 27,003 41,150 29,337

1000 9.0 10.2

0.19

33,203 27,768 37,421 29,751 5.0 3.9 37,187 29,751 42,421 31,735 7.0 6.5 40,000 30,941 45,625 33,322

1200 9.0 10.2

0.28

35,760 31,119 39,941 33,025 5.0 3.9 40,195 33,035 45,520 35,329 7.0 6.5

M1-7310 VARA-

THERM 36

M1-5023 CW036A8K5-45A 20 x 16, 4 Row,


43,593 34,411 49,375 37,164 1400

9.0 10.2

0.34

42,070 31,878 47,968 34,703 8.0 5.2 44,609 33,089 50,781 35,914 10.0 7.6 47,109 34,300 53,977 37,520

1200 13.0 12.3

0.12

45,772 35,596 52,031 38,406 8.0 5.2 48,906 37,001 55,625 40,280 10.0 7.6 52,109 38,406 59,375 42,153

1400 13.0 12.3

0.17

48,984 39,398 55,390 42,060 8.0 5.2 52,578 40,995 59,755 44,190 10.0 7.6 56,388 42,592 64,218 46,319

1600 13.0 12.3

0.21

51,796 42,887 58,593 45,865 8.0 5.2 55,859 44,674 63,281 47,652 10.0 7.6 60,210 46,461 68,593 50,035

1800 13.0 12.3

0.25

54,218 46,069 61,328 48,701 8.0 5.2 58,828 48,043 66,718 51,334 10.0 7.6

M1-7515 VARA-

THERM 60

M1-5025 CW060A9K9-18A 28 x 17.5, 4 Row,


63,750 50,018 72,500 53,966 2000

13.0 12.3 0.30

16 FP/circuit, means there is 16 flow paths through the water coil for each circuit





TABLE 3

Blower Performance ECM – 2.3 Motor Air Flow

Model TTI Part #

Nominal Tons CFM

Motor HP

Volts 1 Ph.

50/60 Hz.

Motor Code

Blower Wheel

Cooling Jumper

CFM @

“G”

CFM @

“Y1”

CFM @

“Y2”

Heating Jumper

CFM @

“W1”

CFM @

“EM”

A 347 470 825 A 900 675 B 305 413 725 B 800 600 C 263 356 625 C 740 555

VARA-THERM 24

M1-7205 1 – 2 0.33 240 VA 9 x 6

D 221 299 525 D 740 555 A 589 1050 1400 A 1500 1320 B 505 900 1200 B 1300 1144 C 421 750 1000 C 1100 968

VARA-THERM 36

M1-7310 2 – 3.5 0.50 240 VB 10 x 7

D 337 600 800 D 960 845 A 800 1600 1900 A 2000 1760 B 716 1431 1700 B 1800 1584 C 632 1263 1500 C 1600 1408

VARA-THERM 60

M1-7515 3 - 5 0.75 240 VC 12 x 9

D 547 1095 1300 D 1485 1307 ADJUST JUMPER – (This is a global setting) (Normal)-see above table (+) - 12% faster than normal (-) - 12% slower than normal. Jumpers should only be adjusted when the circuit breaker on the unit is turned off. “W1” will activate electric heat. CFM can be verified by counting the number of times the CFM LED blinks. The # of blinks during each complete cycle X 100 = CFM

TABLE 4

Blower Performance ECM – 2.3 Motor Amps@ 240 Vac

Model TTI Part #

Nominal Tons CFM

Motor HP

Volts 1 Ph. 50/60 Hz.

Motor Code

Blower Wheel

Cooling Jumper

Amps @ “G”

Amps @

“Y1”

Amps @

“Y2”

Heating Jumper

Amps @

“W1”

Amps @

“EM”

A .06 .15 .60 A .74 .43 B .05 .11 .44 B .53 .32 C .03 .08 .27 C .39 .23

VARA- THERM 24

M1-7205 1 – 2 0.33 240 VA 9 x 6

D .03 .06 .17 D .39 .23 A 0.17 0..68 1.54 A 1.92 1.55 B 0.13 0.46 1.00 B 1.20 1.00 C 0.10 0.32 0..59 C 0.77 0.62

VARA- THERM 36

M1-7310 2 – 3.5 0.50 240 VB 10 x 7

D 0.08 0.22 0..37 D 0.52 0.45 A 0.37 1.22 2.01 A 2.35 1.88 B 0.33 0.92 1.47 B 1.70 1.42 C 0.30 0.70 1.05 C 1.24 1.01

VARA- THERM 60

M1-7515 2 - 5 0.75 240 VC 12 x 9

D 0.26 0.55 0.77 D 1.02 .87 All Amp readings except “G” are taken @ .15 total static across the fan coil cabinet





TABLE 5

Fan Coil Electrical Data Motor Data Electric Heater Data Min. Cir. Ampacity Max. Cir. Ampacity

Amps 240 V

Amps 240 V

Min CA 240 V

Min CA 240 V

Max CA 240 V

Max CA 240 V

Model TTI Part #

Motor HP

Volts 1 Ph

Motor Type

Motor Amps

(1)

NO of Circuits

KW (2)

Cr 1 Cr 2 Cr1 Cr 2 Cr1 (3,4) Cr 2 (3,4) (VARA-THERM 2405B8K3NTT) Small Cabinet / CFM 300 – 900 / 5 Kw Electric Heat

VARA-

THERM 24 M1-7205

0.33 208/240 ECM 2.8 1 5 20.8 N/A 28.8 N/A 35 N/A

(VARA-THERM 3610B8K5NTT) Medium Cabinet / CFM 600 – 1500 / 10 Kw Electric Heat

VARA- THERM 36

M1-7310

.050 208/240 ECM 4.3 1 10 41.7 N/A 56.4 N/A 60 N/A

(VARA-THERM 6015B9K9NTT) Large Cabinet / CFM 1100 – 2000 / 15 Kw Electric Heat

VARA- THERM 60

M1-7515

0.75 208/240 ECM 6.8 2 15 20.8 41.7 32.8 58.9 40 70

(1) Motor Nameplate Amps (2) Nominal Kw at 240 Vac (Derate 25% for 208 Vac) (3) Fuse or HACR Breaker (4) Maximum Over current Device, Over current Protection Installed on Breaker Models are sized Per MCA





Physical Data

All Dimensions in Inches Model

TTI Part #

Size (Tons

) A Width

B Depth

C D E F G Height

VARA-THERM 24 M1-7205

1 - 2 17 5/8 21 16 1/3 20 1/4 15 1/2 12 ½ 43


2 – 3.5 21 1/8 21 19 3/4 20 1/4 19 12 1/2 48 1/4


3 - 5 25 22 23 3/8 20 1/2 19 5/8 16 1/8 58 3/4

Chilled Water Return

Chilled Water Supply





Uncased Water Coil Physical Data

Pan Removed For Clarity Front Side Back The (top) CWR port is the discharge or leaving water port. (Out to Buffer Tank) The (bottom) CWS port is the supply or inlet water port. (In from Buffer Tank)

All Dimensions In Inches Chilled Water Coil # TTI Part #

Size (Ton)

A B C D E F G H I CW024A8K3/-44A

M1-5022 2 16.63 19.00 18.5 16.0 4.0 8.67 8.67 3.27 16.0

CW036A8K5/-45A M1-5023

3 19.63 19.00 21.0 20.0 6.76 6.77 6.77 6.04 16.0

CW060A9K9/-18A M1-5025

5 23.92 20.50 28.0 28.58 9.38 9.38 9.38 8.66 17.50

The above water coils all have 16 flow paths per circuit CW024A8K3 water coil manifolds are terminated with 7/8” OD copper ( ¾” Type M) CW036A8K5 water coil manifolds are terminated with 7/8” OD copper CW060A9K9 water coil manifolds are terminated with 1 1/8” OD copper ( 1” Type M) NOTES:

1. The above chilled water coils are designed as high efficiency “A” coils to be installed on/in new or existing furnaces/air handlers. These coils may be used in upflow and downflow applications.

2. Coils are ETL and CSA approved 3. Primary and secondary drain connections are available on the LH and RH side of the drain pan, and

are ¾” FPT. Center line of drains located from pan corner, 1½” for primary and 3½” for secondary 4. Drain pan is injection molded high temperature UL approved plastic.

Warning!! If using a dual fuel application, “A” coil must be installed on the outlet of the furnace. Installation on the return could cause furnace heat exchanger failure, and may void furnace warranty.





Contractors Notes:

File location: \\Tt\common\Assemblies\Fan Coils\Summit Variable Speed\M1-7205\TTI Info File name: Terra-Therm Variable Speed Fan Coils IO manual Date: Aug. 8, 2010

terra-therm inc. variable speed fan coil installation...

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