Specifications

TYPICAL WIRING SCHEMATIC — IN-CEILING CASSETTE
LEGEND
C—Contactor
CAP — Capacitor
CKT BD — Circuit Board
CLO — Compressor Lockout
COMP — Compressor
CR — Control Relay
CT — Current Transformer
DFB — Defrost Board (Outdoor
Unit)
DFT — Defrost Thermostat
DR — Defrost Relay
DTS — Discharge Temp. Sensor
EQUIP
GND
— Equipment Ground
FL — Fuse Link
FPT — Freeze Protection
Thermostat
FR — Fan Relay
HC — Heating Contactor
HLC — Heating Limit Contactor
HP — Heat Pump
HPS — High-Pressure Switch
HTR — Heater
IFM — Indoor-Fan Motor
LED — Light-Emitting Diode
LLPS — Liquid Low Pressure
Switch
LS — Limit Switch
N.C. — Normally Closed
N.O. — Normally Open
OF — Outdoor Fan
OFM — Outdoor-Fan Motor
OL — Overload
PDR — Pump Delay Relay
PL — Plug
PM — Pump Motor
PSS — Pump Shutoff Switch
RIDTS — Remote Indoor Temp.
Sensor
RVS — Reversing Valve Solenoid
TB — Terminal Block
TDR — Time Delay Relay
TP — Test Point
TRAN — Transformer
Terminal (Marked)
Terminal (Unmarked)
Splice
Terminal Block
Factory Wiring
Field Control Wiring
Field Power Wiring
Printed Circuit Board
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 all local codes.
3. Transformer is thermally protected and will reset automatically.
4. IFM(S), OFM, and COMP have internal thermal protection.
5. The CLO locks out the compressor to prevent short cycling on compressor overloads and safety
devices. Before replacing CLO, check these devices. Minimum one amp turn required to hold con-
tacts closed.
6. Heating contactor energizes electric heater in fan coil. Heater requires separate power source for
electrical power.
RELAY CHART
INDOOR FAN HIGH FR2
INDOOR FAN MED FR1, FR2
INDOOR FAN LOW FR1
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