Carrier 52S Architects And Engineers' Manual page 37

CAP — Capacitor
COMP — Compressor
CR — Cooling Relay
EQUIP — Equipment Ground
GND
— Fan Motor
FM
FR — Fan Relay
— Heating Relay
HR
— Indoor Frost Thermostat
IFT
L — Power Supply Line
OFT — Outdoor Frost Thermostat
OL — Overload
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 (National Electrical Code) and local codes.
5. Dashed lines indicate components when used.
6. Control center uses thermostat part no. HH01AD045 or equivalent.
7. Field control wire suitable for NEC class 2 control circuit, at 24 volts.
52SQ — Typical Wiring Schematic for Wall Thermostat Control Units
LEGEND
PL — Plug
— Primary Limit Switch
PLS
RVR — Reversing Valve Relay
RVS — Reversing Valve Solenoid
— Secondary Limit Switch
SLS
— Speed Selector Switch
SSS
ST — Start Thermistor
TB — Terminal Board
TRANS — Transformer
Component Connection
(Marked)
37
Component Connection
(Unmarked)
Terminal Board Connection
Field Control Wiring
Accessory or Optional Wiring
Factory Wiring
To Indicate Common Poten-
tial Only Not to Represent
Wire