CAUTION
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.
Power supply to the unit must be N.E.C. Class 1, and must comply with all applicable codes. A fused disconnect switch should be field provided for the unit. The switch must be separate from all other circuits.
WARNING
Unit must be grounded in accordance with national and local codes. Failure to ground unit properly can result in personal injury or death.
Electrical Access
Heater Power Entry 
Thermostat 
Entry
Line Voltage
Entry
Figure 5
If any of the wire supplied with the unit must be replaced, replacement wire must be of the type shown on the wiring
diagram. Electrical wiring must be sized to carry minimum circuit ampacity marked on the unit. Use copper conduc- tors only. Each unit must be wired with a separate branch
circuit and be properly fused.
Typical Wiring Connections
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| THERMOSTAT | OUTDOOR UNIT | |||||
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| R |
| R | |||
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| C |
| C | |||
| ECONOMIZER | Y |
| Y | ||||
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| NOT |
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| INSTALLED | O |
| O | ||||
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| W |
| W1 |
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| W2 |
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| G |
| G | |||
| CAUTION |
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Do not connect C connections except when |
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required by the indoor thermostat. Refer to the |
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thermostat installation instructions. |
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| L2 | L1 |
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GROUND
SCREW
POWER WIRING
(90°C MIN. WIRE)
POWER WIRING
24V CONTROL WIRING (NEC CLASS 2)
*W1, W2 CAN BE USED TO STAGE ELECTRIC HEAT ACCESSORY ON 15, 20 & 25 KW MODELS.
*5 & 10 KW HEATER ACCESSORY FUNCTION OFF
W1 ONLY.
TYPICAL WIRING CONNECTION
1 PHASE
THERMOSTAT |
| OUTDOOR UNIT | ECONOMIZER |
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R |
| R |
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C |
| C | BLUE |
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Y1 |
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| WHITE |
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| Y | YELLOW |
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O |
| O | ORANGE |
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W |
| W1 |
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| W2 |
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| CAUTION | |
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G |
| G | GREEN | Do not connect C connections except when |
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| required by the indoor thermostat. Refer to the |
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| BLACK | thermostat installation instructions. |
Y2 |
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L3 | L2 | L1 |
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| GROUND |
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| SCREW |
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POWER WIRING
(90°C MIN. WIRE)
POWER WIRING
24V CONTROL WIRING (NEC CLASS 2)
*W1, W2 CAN BE USED TO STAGE ELECTRIC HEAT ACCESSORY ON 15, 20 & 25 KW MODELS.
*10 KW HEATER ACCESSORY FUNCTION OFF
W1 ONLY.
TYPICAL WIRING CONNECTION
3 PHASE
Figure 6
# 48369K005 | Page 5 |
