Armstrong Air RP14AC Series Manuel d'instructions d'installation et d'entretien - Page 4

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Electrical Wiring

All field wiring must be done in accordance with National

Electrical Code recommendations, local codes, and

applicable requirements of UL Standards, or in accordance

with Canadian Electrical Code recommendations, local

codes, or CSA Standards. Power wiring, disconnect

means, and over-current protection are to be supplied by

the installer. Refer to the unit rating plate for maximum

over-current protection and minimum circuit ampacity, as

well as operating voltage. The power supply must be sized

and protected according to specifications supplied.

The unit must be grounded with a separate ground

conductor. See Figure 4 for typical field wiring connection.

The wiring diagram can be found on the unit inside the

access panel. Low voltage control wiring are terminal strip

or pigtail leads located on the main control box and are

color-coded to match the connection called out on the

wiring schematic.

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.

Units are factory wired for a 230-volt power supply.

If power supply is 208 volts, it will be necessary to

change a wire connection on the unit transformer from

240V terminal to 208V terminal as shown on the wiring

diagram.

Use only copper conductors.

If any of the original unit wiring is replaced, the same size

and type wire must be used.

Thermostat

The room thermostat should be located on an inside

wall where it will not be subject to drafts, sun exposure,

or heat from electrical fixtures or appliances. Follow the

manufacturer's instructions enclosed with the thermostat

for general installation procedure. Color-coded insulated

wires (#18 AWG) should be used to connect the thermostat

to the unit. A minimum of five wires are required for proper

installation.

Page 4 of 13

CAUTION

Contactor

If 208 Volt is supplied, transformer connection must be

changed

Figure 3. 208/230 Line Voltage Wiring

"O" connection used only on heat pump models

W1, W2 can be used to stage electric heat accessory on 10,

15 & 20 kW models. 5 And 7 kW heater accessory function

off W1 only.

Figure 4. Typical Wiring Connections

Issue 1650

Field-Supplied Fused

Ground

or Circuit Breaker

Lug

Disconnect

507296-01