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52C,P
SERIES
TYPICAL THERMOSTAT INTERFACE
T’STAT OUTPUT: | RC CONTROLER OUTPUT: | UNIT OPERATION: | |
‘G’ — 24 VAC | ‘FR’ — LINE VAC | FAN | |
‘G’ — 0 VAC | ‘FR’ — 0 VAC | ||
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‘Y’ — 24 VAC | ‘HR1 & HR2’ — LINE VAC | HEATING | |
‘O’ — 0 VAC | ‘RVR’ — LINE VAC | ||
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‘W’ — 24 VAC | ‘HR1 & HR2’ — LINE VAC | HEATING | |
‘Y’ — 24 VAC | ‘CR’ — LINE VAC | COOLING | |
‘O’ — 24 VAC | ‘RVR’ — 0 VAC | ||
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‘R’ — 24 VAC | ‘R’ — 24 VAC OUTPUT | POWER TO WALL | |
‘C’ — COMMON | ‘C’ — COMMON | THERMOSTAT |
1.If ‘W’ is ON, then ‘FR’ is forced ON (regardless of ‘G’) & ‘CR’ is forced OFF.
2.If ‘Y’ is ON, then ‘FR’ is forced ON (regardless of ‘G’).
3.If IFT (indoor coil) is < 35° F, then ‘CR’ is forced OFF until IFT is > 39° F.
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| Component Connection (Marked) | HTR | — | Heater | ||
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| IFT | — | Indoor Frost Thermostat | |||
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| Component Connection (Unmarked) | NEC | — | National Electrical Code | ||
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| OFT | — | Outdoor Frost Thermostat | |||
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| Terminal Board Connection | OL | — | Overload | ||
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| PCBD | — | Printed Circuit Board | |
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| Field Splice | HR1 | — | Heater Relay | ||
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| Field Control Wiring | HR2 | — | Heater Relay | ||
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| CR | — | Compressor Relay | |||
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| Accessory or Optional Wiring | FR | — | Fan Relay | ||
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| RVR | — | Reversing Valve Relay | |||
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| To Indicate Common Potential Only | PLS | — | Primary Limit Switch | ||
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| RVS | — | Reversing Valve Solenoid | |||
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| Not To Represent Wire | |||||
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| SLS | — | Secondary Limit Switch | |||
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CAP | — | Capacitor | SSS | — | Speed Selector Switch | ||
COMP | — | Compressor | ST | — | Start Thermistor | ||
FM | — | Fan Motor | TRANS | — | Transformer |
NOTES:
1.Recommended for use on grounded power supply only.
2.Compressor and fan motor thermally protected.
3.Use copper conductors only.
4.All wiring must conform with NEC and local codes.
5.Dashed lines indicate components when used.
6.Field control wire suitable for NEC class 2 control circuit, at 24 volts.
7.OFT determines whether to bring on compressor heat or electric heat.
FIGURE 69 — 52CQ AND 52 PQ — TYPICAL WIRING SCHEMATIC FOR
WALL THERMOSTAT HEAT PUMP UNITS
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