Low Voltage
Terminal Strip
Figure 4 - Low Voltage Connection
Unit Control Box
Refer to the unit wiring diagram for electrical connections. When installed, the unit must be electrically grounded in accordance with local codes or in the absence of local codes, with the National Elec- trical Code, ANSI/NFPA No. 70, and/or the CSA C22.1 Electrical Code, if an external source is utilized.
WARNING
TO AVOID PERSONAL INJURY OR DEATH DUE TO ELECTRIC SHOCK, WIRING MUST BE PROPERLY GROUNDED.
CAUTION
TO AVOID PROPERTY DAMAGE OR PERSONAL INJURY DUE TO FIRE, USE ONLY COPPER CONDUCTORS.
CAUTION
TO PREVENT IMPROPER AND DANGEROUS OPERATION DUE TO WIRING ERRORS, LABEL ALL WIRES PRIOR TO DISCONNECTION WHEN SERVICING CONTROLS. VERIFY PROPER OPERATION AFTER SERVICING.
The best protection for the wiring is the lowest rated fuse or circuit breaker which will supply power to the unit during normal operation without nuisance trips. Such a device will provide maximum circuit protection. DO NOT EXCEED THE MAXIMUM OVERCURRENT DEVICE SIZE SHOWN ON UNIT DATA PLATE.
All line voltage connections must be made through weatherproof fittings. All exterior power supply and ground wiring must be in ap- proved weatherproof conduit. Low voltage wiring from the unit con- trol panel to the thermostat requires coded cable.
FLEXIBLE WIRING SETUP
Line and low voltage wiring can enter the unit from either side.
REAR VIEW
ELECTRICAL
SUPPLY RETURN
AIRAIR
UNIT VOLTAGE
The unit transformer is factory connected for 230V operation. If the unit is to operate on 208V, reconnect the transformer primary lead as shown on the unit wiring diagram.
CIRCULATING AIR AND FILTERS
DOWNSHOT AIRFLOW CONVERSION
Units are shipped from the factory ready for horizontal airflow. These units can be easily converted from horizontal to downshot airflow delivery. If conversion to vertical airflow is necessary, proceed as follows:
BLOWER ROTATION
The first step in the conversion is to rotate the blower assembly for downshot airflow. After rotating the blower assembly, the blower motor must be oriented as shown in Figure 7 with the motor wires at the bottom. This keeps condensate from puddling inside the blower motor and causing motor failure. If the motor is not oriented correctly, loosen the motor belly band and rotate the motor to the correct position, then retighten the motor belly band.
1.Cut insulation around bottom openings and remove panels from the bottom of the unit, saving the screws holding the panels in place.
2.From the rear of the unit, remove the four screws securing the blower assembly in place and loosen the two screws directly below the duct opening (Figure 5).
Remove
Loosen
Figure 5 - Duct Removal
3.Remove the clamp securing the blower assembly to the bottom of the unit. The clamp and screws may be discarded (Figure 6).
{
} Airflow
SIDE VIEW |
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HEATER | ELECTRICAL | ELECT. |
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KIT |
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BLOWER | LOW | CONTROL | COMPRESSOR |
BOX | |||
| VOLTAGE | EVAP |
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| COIL |
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For knockout locations, see dimension drawing in the Product Data Book applicable to your model* . Use the Single Point wiring kit to add further flexibility to the installation wiring.
Remove
Figure 6 - Clamp Removal
4.Rotate the blower assembly 90° clockwise, setting the blower assembly outlet on the bottom of the unit and secure with two screws removed in step 2 (Figure 7) .
5.Tighten the two screws below the duct opening that were loosened in step 2.
NOTE: To keep condensate from collecting inside the blower motor, ensure the motor is oriented with its leads exiting at the bottom of the motor (Figures 5 and 6).
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