THERMOSTAT
The room thermostat should be located on an inside wall approximately 56 inches above the floor where it will not be subject to drafts, sun exposure or heat from electrical fixtures or appliances. Follow the manufac- turer's instructions enclosed with the thermostat for general installation procedure. A minimum of seven
POWER AND CONTROL WIRING
Field wiring to the unit must conform to provisions of the National Electrical Code, ANSI / NFPA No. 70 (in U.S.A.), current Canadian Electrical Code C22.1 (in Canada) and/or local ordinances. The unit must be electrically grounded in accordance with NEC and CEC (as specified above) and/or local codes. Voltage toler- ances, which must be maintained at the compressor terminals, during starting and running conditions, are indicated on the unit Rating Plate and the Unit Applica- tion Data table.
The internal wiring harness furnished with this unit is an integral part of a CSA design certified unit. Field alteration to comply with electrical codes should not be required.
A fused disconnect switch should be field provided for the unit. The switch must be separate from all other cir- cuits. Wire entry at knockout openings require conduit fittings to comply with NEC (in U.S.A.), CEC (in Can- ada) and/or local codes. If any of the wire supplied with the unit must be replaced, replacement wire must be of the type shown on the wiring diagram and the same minimum gauge as the replaced wire.
Use copper conductors properly sized to carry the load. Each unit must be wired with a separate branch circuit fed directly from the meter panel and properly fused.
When connecting electrical power and control wiring to the unit, waterproof type connectors MUST BE USED so that water or moisture cannot be drawn into the unit during normal operation. The above waterproofing conditions will also apply when installing a
Refer to the Typical Field Wiring Figure 3 and to the appropriate unit wiring diagram for control circuit and power wiring information.
TABLE 2: CONTROL WIRE SIZES
Wire Size | Maximum Length1 |
18 AWG | 150 Feet |
|
|
1.From the unit to the thermostat and back to the unit.
OPTIONS/ACCESSORIES
ELECTRIC HEAT
The
These CSA approved heaters are located within the central compartment of the unit with the heater ele- ments extending into the supply air chamber. Refer to Figure 7 for access panel location.
Fuses are supplied, where required, by the factory. Some KW sizes require fuses and others do not. Refer to Table 3 for minimum CFM limitations and to Tables 9 and 10 for electrical data.
10 | Unitary Products Group |
