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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. ConnectTRAN2 to BLKlead for460 vunits. Connectto ORNlead
for 230 v units. If 208/230 v units are run with a 208 v power sup-
ply connect to RED lead.
3. Circuitbreaker must tripamps areequal to orless 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.
55