WIRING — MAIN POWER
Refer to the unit rating plate for wire sizing information and maximum fuse or “HACR Type” circuit breaker size. Each outdoor unit is marked with a “Minimum Circuit Ampacity”. This means that the field wiring used must be sized to carry that amount of current. Depending on the installed KW of electric heat, there may be two field power circuits required. If this is the case, the unit serial plate will so indicate. All models are suitable only for connection with copper wire. Each unit and/or wiring diagram will be marked “Use Copper Conductors Only”. These instructions must be adhered to. Refer to the National Electrical Code (NEC) for complete current carrying capacity data on the various insulation grades of wiring material. All wiring must conform to NEC and all local codes.
The electrical data lists fuse and wire sizes (75ºC copper) for all models, including the most commonly used heater sizes. Also shown are the number of field power circuits required for the various models with heaters.
The unit rating plate lists a “Maximum Time Delay Relay Fuse” or “HACR Type” circuit breaker that is to be used with the equipment. The correct size must be used for proper circuit protection and also to assure that there will be no nuisance tripping due to the momentary high starting current of the compressor motor.
The disconnect access door on this unit may be locked to prevent unauthorized access to the disconnect. To convert for the locking capability, bend the tab located in the bottom left hand corner of the disconnect opening under the disconnect access panel straight out. This tab will now line up with the slot in the door. When shut, a padlock may be placed through the hole in the tab preventing entry.
WIRING — LOW VOLTAGE WIRING
230/208V, 1 phase and 3 phase equipment dual primary voltage transformers. All equipment leaves the factory wired on 240V tap. For 208V operation, reconnect from 240V to 208V tap. The acceptable operating voltage range for the 240 and 208V taps are shown in Table 4:
TABLE 4
OPERATING VOLTAGE RANGE
TAP | RANGE | ||
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240V | 253 | - | 216 |
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208V | 220 | - | 187 |
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NOTE: The voltage should be measured at the field power connection point in the unit and while the unit is operating at full load (maximum amperage operating condition.)
If no motorized vent option is used, nine (9) wires should be run from the thermostat subbase to the 24V terminal board in the unit. A nine (9) conductor, 18 gauge copper
LOW VOLTAGE CONNECTIONS
These units use a grounded 24 volt AC low voltage circuit.
The "R" terminal is the hot terminal and the "C" terminal is grounded.
"G" terminal is the fan input.
"Y" terminal is the compressor input for cooling and heat pump.
"B/W1" terminal is the reversing valve input. The reversing valve must be energized for heating mode.
"R" terminal is 24 VAC hot.
"C" terminal is 24 VAC grounded.
"L" terminal is compressor lockout output. This terminal is activated on a high or low pressure trip by the electronic heat pump control. This is a 24 VAC output.
"W2" terminal is second stage heat (if equipped).
"01" terminal is the ventilation input. This terminal energizes any factory installed ventilation option.
"E" terminal is the emergency heat input. This terminal energizes the emergency heat relay.
LOW VOLTAGE CONNECTIONS
FOR DDC CONTROL
Energize G
Energize Y, G
Energize Y, G, B
Energize G, W2, Y, B/W1
Energize G, O1
Energize B, W2, E, G
Manual | |
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