5FT.MIN.
FIG. 2 - TYPICAL RIGGING (7-1/2 Ton Shown)
CLEARANCES
All units require certain minimum clearances for proper opera- tion and service. Refer to Figure 4 for these clearances.
Refer to Figure 4 for the location of the power wire access opening through the front of the unit. This opening will require a
The
Refer to Figure 3 for typical field wiring.
CONTROL WIRING
Refer to Figure 4 for the location of the control wire access opening through the front of the unit.
Route the necessary low voltage control wires (18 AWG min.) from the TB1 terminal block inside of the unit control box through this access opening to the room thermostat and to the evaporator blower motor controller.
The room thermostat should be located on an inside wall ap- proximately 56" above the floor where it will not be subject to drafts, sun exposure or heat from electrical fixtures or appli- ances. Follow manufacturer's instructions enclosed with ther- mostat for general installation procedure.
Refer to Figure 3 for typical field wiring.
COMPRESSOR
WARNING: Do not permit overhanging structures or shrubs to obstruct condenser air discharge.
Additional height may be required for snow clearance if winter operation is expected.
POWER AND CONTROL WIRING
Install electrical wiring in accordance with the latest National Electrical Code (NFPA Standard No. 70) and/or local regula- tions. The unit should be grounded in accordance with these codes.
POWER WIRING
Check the voltage of the power supply against the data on the unit nameplate. Check the size of the power wire, the discon- nect switch and the fuses against the data on Table 3.
NOTE: Copper conductors must be installed between the dis- connect switch and the unit.
TABLE 2 - PHYSICAL DATA
Units are shipped with compressor mountings factory- adjusted and ready for operation.
CAUTION: Do Not loosen compressor mounting bolts.
COMPRESSOR CRANKCASE HEATER (7-1/2 & 10 ton units only)
The compressor is equipped with a crankcase heater to prevent refrigerant from mixing with crankcase oil during the “OFF” cycle. The heaters will be energized when the compressor is not running providing the unit disconnect switch is closed.
CAUTION: Do not attempt to start the compressor without at least eight hours of crankcase heat or compressor damage will occur.
If a unit has just been installed or the unit disconnect switch has been open for a long period of time, move the system switch on the room thermostat to the “OFF” position before closing the unit disconnect switch. Eight hours of crankcase heat are re- quired to drive the liquid refrigerant out of the compressor bef- ore the compressor can be started.
| Compressor |
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| Condenser |
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| Unit | Charge, |
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| (Tandem on |
| Fan (Propeller) |
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| Fan Motor1 |
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| Coil3 |
| Weight |
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Model | 150 only) |
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HCE | Rating | Cap. |
| Dia. | Nom. | Blades |
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| Rotation2 | Face | Finned | Rows |
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| Oper.4 | |||
| Qty. |
| Pitch | Qty. | HP | RPM | Area | Length | Ship. | Oper. | Holding | |||||||||
| (Tons) | (Stages) |
| (in.) | CFM | Qty. | (Deg.) |
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| (Ft.2) | (in.) | High |
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090 | 1 | 1 | 24 | 4677 | 3 | 29 | 1 | 3/4 | 1120 |
| CW | 18.7 | 90 | 30 | 365 | 360 | 1 - 12 | 12 - 05 | ||
120 | 10 | 1 | 2 | 24 | 8034 | 3 | 27 | 2 | 1/2 | 1110 |
| CCW | 23.8 | 96 | 36 | 435 | 430 | 2 - 4 | 18 | - 6 |
150 | 1 | 2 | 24 | 7950 | 3 | 27 | 2 | 1/2 | 1110 |
| CCW | 23.8 | 96 | 36 | 515 | 510 | 2 - 4 | 19 | - 5 | |
1These PSC motors are directly connected to the condenser fans and have inherent protection, ball bearings and a 48 frame. 2When viewing the shaft end of the motor.
3These condenser coils have 2 rows of 3/8” OD copper tubes and 16 aluminum fins per inch.
4Includes matched indoor blower unit but no piping. Refer to Table 6 for refrigerant line charge.
5Add an additional 1 lb. charge when used with KEU120 (10 ton) indoor units.
4 | Unitary Products Group |
