31
LEGEND AND NOTES FOR FIG. 19-25
LEGEND
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).
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.
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
HR —
Heater Relay
IAQ —
Indoor Air Quality
IDM —
Induced Draft Motor
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
MGV —
Main Gas Valve
NEC —
National Electrical Code
OARH —
Outdoor Air Relative Humidity Sensor
OAT —
Outdoor Air Thermostat
OFC —
Outdoor Fan Contactor
OFM —
Outdoor Fan Motor
PEC —
Power Exhaust Contactor
PEM —
Power Exhaust Motor
PL —
Plug Assembly
PTC —
Positive Temperature Coefficient
Power Reference
RARH —
Return Air Relative Humidity Sensor
RAT —
Return Air Thermistor
RS —
Rollout Switch
SCB —
Staged Gas Board
SCT —
Saturated Condensing Temperature Sensor
TB —
Terminal Block
TRAN —
Transformer
VFD —
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
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