Carrier 50FK User Manual
Page 55
LEGEND AND NOTES FOR FIG. 55
ALM
— Alarm
C
— Contactor
CB
— Circuit Breaker
CCB
— Control Circuit Breaker
COMP — Compressor
CH
— Crankcase Heater
CR
— Control Relay
DPS
— Differential Pressure Switch
DPT
— Discharge Pressure Transducer
EAT
— Enering-Air Temperature
EC
— Enthalpy Control
ECR
— Economizer Close Relay
EOR
— Economizer Open Relay
EQUIP — Equipment
FS
— Fan Status Switch
GND
— Ground
HIR
— Heat Interlock Relay
HPS
— High-Pressure Switch
HR
— Heater Relay
HTR
— Heater
IDC
— Induced Draft Contactor
IDM
— Induced Draft Motor
IFC
— Indoor (Evaporator) Fan Contactor
IFCB
— Indoor Fan Circuit Breaker
IGV
— Inlet Guide Vanes
IGVM
— Inlet Guide Vanes Motor
LAT
— Leaving-Air Temperature
LPS
— Low-Pressure Switch
MTR
— Motor
MV
— Main Valve
NC
— Normally Closed
NO
— Normally Open
OFC
— Outdoor Fan Contactor
OFM
— Outdoor (Condenser) Fan Motor
OMR
— Outdoor Motor Relay
PCB
— Power Exhaust Circuit Breaker
PEC
— Power Exhaust Contactor
PEDM — Power Exhaust Damper Motor
PEM
— Power Exhaust Motor
P, PL
— Plug
RCB
— Return Fan Circuit Breaker
RES
— Resistor
RFC
— Return Fan Contactror
RFM
— Return Fan Motor
SCT
— Saturated Condensing Thermistor
TB
— Terminal Block
TRAN — Transformer
U
— Unloader
VFD
— Variable Frequence Drive
Field Wiring
Factory Wiring
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 signifies single pole double throw contacts. An un-
derlined number signifies 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.
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