Carrier 50FK Alm, Lat, Lps, Mtr, Ccb, Comp, Ofm, Dpt, Omr, Eat, Pcb, Ecr, Eor, Pem, Equip, Rcb

LEGEND AND NOTES FOR FIG. 55

ALM	Ð Alarm	LAT	Ð Leaving-Air Temperature
C	Ð Contactor	LPS	Ð Low-Pressure Switch
CB	Ð Circuit Breaker	MTR	Ð Motor
CCB	Ð Control Circuit Breaker	MV	Ð Main Valve
COMP	Ð Compressor	NC	Ð Normally Closed
CH	Ð Crankcase Heater	NO	Ð Normally Open
CR	Ð Control Relay	OFC	Ð Outdoor Fan Contactor
DPS	Ð Differential Pressure Switch	OFM	Ð Outdoor (Condenser) Fan Motor
DPT	Ð Discharge Pressure Transducer	OMR	Ð Outdoor Motor Relay
EAT	Ð Enering-Air Temperature	PCB	Ð Power Exhaust Circuit Breaker
EC	Ð Enthalpy Control	PEC	Ð Power Exhaust Contactor
ECR	Ð Economizer Close Relay	PEDM Ð Power Exhaust Damper Motor
EOR	Ð Economizer Open Relay	PEM	Ð Power Exhaust Motor
EQUIP	Ð Equipment	P, PL	Ð Plug
FS	Ð Fan Status Switch	RCB	Ð Return Fan Circuit Breaker
GND	Ð Ground	RES	Ð Resistor
HIR	Ð Heat Interlock Relay	RFC	Ð Return Fan Contactror
HPS	Ð High-Pressure Switch	RFM	Ð Return Fan Motor
HR	Ð Heater Relay	SCT	Ð Saturated Condensing Thermistor
HTR	Ð Heater	TB	Ð Terminal Block
IDC	Ð Induced Draft Contactor	TRAN	Ð Transformer
IDM	Ð Induced Draft Motor	U	Ð Unloader
IFC	Ð Indoor (Evaporator) Fan Contactor	VFD	Ð Variable Frequence Drive
IFCB	Ð Indoor Fan Circuit Breaker		Field Wiring
IGV	Ð Inlet Guide Vanes
			Factory Wiring
IGVM	Ð Inlet Guide Vanes Motor

NOTES:

1. Connect TRAN1 to H4 for 460 v units. Connect to H3 for 230 v units. If 208/230 v units are run with a 208 v power supply connect to H2 .

2.Connect TRAN2 to BLK lead for 460 v units. Connect to ORN lead for 230 v units. If 208/230 v units are run with a 208 v power sup- ply connect to RED lead.

3.Circuit breaker must trip amps are equal to or less than 156% FLA (full load amps) for CB1 and CB2. All others are 140%.

4.If any of the original wire furnished must be replaced, it must be replaced with type 90° C wire or its equivalent.

5.Number(s) indicates the line location of contacts. A bracket over

(2) numbers signi®es single pole double throw contacts. An un- derlined number signi®es a normally closed contact. Plain num- bers (no lines), signify a normally opened contact.

6.Condenser fan motors are thermally protected.

7.Three phase motors are protected under primary single phasing conditions.

55