Carrier 50EJQ Installation, Start-Up And Service Instructions Manual page 33

AHA — Adjustable Heat Anticipator
BP — Building Pressure
CB — Circuit Breaker
CC — Cooling Compensator
COM — Communication
COMP — Compressor Motor
COMPR — Compressor Motor
COND — Condenser
CONT — Continuous
CR — Control Relay
DFT — Defrost Thermostat
DM — Damper Motor
EC — Enthalpy Control
FU — Fuse
HC — Heater Contactor
HR — Heater Relay
IFR — Indoor-Fan Relay
L — Light
LS — Limit Switch
NC — Normally Closed
NO — Normally Open
OD — Outdoor
LEGEND FOR FIG. 42
PESC — Power Exhaust Sequencer Controller
PL — Plug Assembly
R — Relay
RVS — Reversing Valve Solenoid
SW — Switch
TB — Terminal Block
TC — Thermostat Cooling
TH — Thermostat Heating
TRAN — Transformer
Terminal (Marked)
Terminal (Unmarked)
Terminal Block
Splice
Factory Wiring
Field Wiring
To indicate common potential
only, not to represent wiring
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