Carrier 48FK Controls Operation And Troubleshooting page 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
NOTES:
1. Connect TRAN1 to
units. If 208/230 v units are run with a 208 v power supply
connect to
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.
LEGEND AND NOTES FOR FIG. 55
LAT
LPS
MTR
MV
NC
NO
OFC
OFM
OMR
PCB
PEC
PEDM — Power Exhaust Damper Motor
PEM
P, PL
RCB
RES
RFC
RFM
SCT
TB
TRAN — Transformer
U
VFD
for 460 v units. Connect to
H4
.
H2
55
— Leaving-Air Temperature
— Low-Pressure Switch
— Motor
— Main Valve
— Normally Closed
— Normally Open
— Outdoor Fan Contactor
— Outdoor (Condenser) Fan Motor
— Outdoor Motor Relay
— Power Exhaust Circuit Breaker
— Power Exhaust Contactor
— Power Exhaust Motor
— Plug
— Return Fan Circuit Breaker
— Resistor
— Return Fan Contactror
— Return Fan Motor
— Saturated Condensing Thermistor
— Terminal Block
— Unloader
— Variable Frequence Drive
Field Wiring
Factory Wiring
for 230 v
H3