Field Power Supply - Carrier 50AJ/AK/AM020 Installation Instructions Manual

AUX — Auxiliary
BP — Building Pressure
C — Contactor, Compressor
CAP — Capacitor
CB — Circuit Breaker
CCB — Control Circuit Breaker
CCH — Crankcase Heater
CCN — Carrier Communication Network
CEM — Controls Expansion Module
COMP — Compressor Motor
CS — Compressor Safety
CSB — Current Sensing Board
DP — Duct Pressure
DS — Disconnect Switch
ECB — Economizer Control Board
EDT — Evaporator Discharge Sensor
EMM — Energy Management Board
FIOP — Factory-Installed Option
GND — Ground
HC — Heat Contactor
HGBP — Hot Gas Bypass
HIR — Heat Interlock Relay
HPS — High Pressure Switch
— Heater Relay
HR
— Indoor Air Quality
IAQ
— Induced Draft Motor
IDM
IFC — Indoor Fan Contactor
IFCB — Indoor Fan Circuit Breaker
IFM — Indoor Fan Motor
IGC — Integrated Gas Unit Controller
IP — Internal Protection
LEN — Local Equipment Network
LS — Limit Switch
MBB — Main Base Board
NOTES:
1. Factory wiring is in accordance with the National Electrical
Codes. Any field modifications or additions must be in compli-
ance with all applicable codes.
2. Use 75° C min wire for field power supply, use copper wires for
all units.
3. All circuit breakers "Must Trip Amps" are equal to or less than
156% RLA (rated load amps).
LEGEND AND NOTES FOR FIG. 19-25
LEGEND
MGV
NEC
OARH — Outdoor Air Relative Humidity Sensor
OAT
OFC
OFM
PEC
PEM
PL
PTC
RARH — Return Air Relative Humidity Sensor
RAT
RS
SCB
SCT
TB
TRAN — Transformer
VFD
31
— Main Gas Valve
— National Electrical Code
— Outdoor Air Thermostat
— Outdoor Fan Contactor
— Outdoor Fan Motor
— Power Exhaust Contactor
— Power Exhaust Motor
— Plug Assembly
— Positive Temperature Coefficient
Power Reference
— Return Air Thermistor
— Rollout Switch
— Staged Gas Board
— Saturated Condensing Temperature Sensor
— Terminal Block
— Variable Frequency Drive
Terminal Block
Terminal (Unmarked)
Terminal (Marked)
Splice
Factory Wiring
Field Wiring
To indicate common potential only.
Not to represent wiring.
To Indicate FIOP or Accessory
4. Compressor and fan motors are thermally protected — three
phase motors protected against primary single phase conditions.
5. Red jumper wire must be added between R and W1 for space
temperature mode and temporarily during service-test mode
when the heaters need to operate.