LEGEND
Fig. 38 — Typical Wiring Schematic and Fig. 39 — Typical Component Arrangement
AHA | — | Adjustable Heat Anticipator | IFC | — | Indoor (Evaporator) Fan Contactor |
BKR W/AT | — | Breaks with Amp Turns | IFCB | — | Indoor (Evaporator) Fan Circuit |
BR | — | Burner Relay |
|
| Breaker |
C | — | Contactor, Compressor | IFM | — | Indoor (Evaporator) Fan Motor |
CAP | — | Capacitor | IGC | — | Integrated Gas Unit Controller |
CB | — | Circuit Breaker | L | — | Light |
CC | — | Cooling Compensator | LED | — | |
CH | — | Crankcase Heater | LOR | — | Lockout Relay |
CLO | — | Compressor Lockout | LPS | — | |
CLS | — | Compressor Lockout Switch | LS | — | Limit Switch |
COMP | — | Compressor Motor | MAT | — | |
CR | — | Control Relay | MGV | — | Main Gas Valve |
CT | — | Current Transformer | NEC | — | National Electrical Code |
DM | — | Damper Motor | OAT | — | |
DU | — | Dummy Terminal | OFC | — | Outdoor (Condenser) Fan Contactor |
EQUIP | — | Equipment | OFM | — | Outdoor (Condenser) Fan Motor |
FPT | — | Freeze Protection Thermostat | PL | — | Plug Assembly |
FU | — | Fuse | QT | — | Quadruple Terminal |
GND | — | Ground | R | — | Relay |
GVR | — | Gas Valve Relay | RS | — | Rollout Switch |
HPS | — | SN | — | Sensor | |
HS | — | Hall Effect Sensor | SW | — | Switch |
HV | — | High Voltage | TB | — | Terminal Block |
IDM | — | TRAN | — | Transformer |
NOTES:
1.Compressor and fan motors thermally protected;
2.If any of the original wire furnished must be replaced, it must be replaced with type 90 C wire or its equivalent.
3.Jumpers are omitted when unit is equipped with economizer.
4.IFCB must trip amps is equal to or less than 140% full load amps.
5.On
6.The CLO locks out the compressor to prevent short cycling on compressor overload and safety devices. Before replacing CLO, check these devices.
7.Number(s) indicates the line location of used contacts. A bracket over (2) numbers sig- nifies a
Terminal (Marked)
Terminal (Unmarked)
Terminal Block
Splice
Splice (Marked)
Splice (Field Supplied)
Factory Wiring Field Control Wiring Field Power Wiring Accessory or Optional Wiring
To Indicate Common Potential Only, Not To Represent Wiring
Fig. 38 — Typical Wiring Schematic (581A180, 208/230 V Shown)