Product data

TYPICAL WIRING SCHEMATICS (cont)
LEGEND AND NOTES FOR TYPICAL WIRING SCHEMATICS, HIGH WALL SYSTEMS
LEGEND
AGING — For Burn-In Test
(short terminals)
AS — Assembly
C—Contactor
CAP — Capacitor
CH — Crankcase Heater
CLO — Compressor Lockout
CN — Connector
COMP — Compressor
CT CLO — Current Sensing Loop (Lockout)
EMI — Electromagnetic Interference
FMC — Fan Motor Capacitor
FU — Fuse
GND — Ground
HA — Home Automation
HPS — High-Pressure Switch
HS — Hall-Effect Sensor
IDC Th — Indoor-Coil Thermistor
IDFM,IFM — Indoor-Fan Motor
JEM-A — Japan Electric Manufacturing
Industry Association
K—Relay
LPS — Low-Pressure Switch
OFM — Outdoor-Fan Motor
OL — Overload
PCB — Printed Circuit Board
RA Th — Return-Air Thermistor
RC — Resistor Capacitor
RCV — Receiver
SC — Start Capacitor
SR — Start Relay
STM — Step Motor
TB — Terminal Block
TP — Thermal Protector
TRAN — Transformer
Terminal (Marked)
Terminal (Unmarked)
Splice
Terminal Block
Factory Wiring
Field Control Wiring
Field Power Wiring
Accessory or Optional Wiring
NOTES:
1. If any of the original wire furnished must be replaced, it must be replaced with type 90 C wire or its
equivalent.
2. Wire in accordance with National Electrical Code (NEC) and local codes.
3. The CLO locks out the compressor to prevent short cycling on compressor overloads and safety
devices. Before replacing CLO, check these other devices. A minimum 1 amp turn is required to
hold contacts closed.
4. A thermistor wiring cable is provided with the fan coil unit.
5. Compressor and fan motors are protected by internal thermal overloads.
6. Transformer has an internal 2 amp thermal fuse on the primary side.
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