Thermostat Wire Connections - Honeywell Inncom E527 Wiring Manual

2. Thermostat wire connections:

HVAC INTERFACE
Connection Color
FC1 Green
FC2 Red
FC3 Black
FC4 Blue
FC5 Brown
FC6 Yellow
FC7 White
FC8 Grey
FC9 Violet
FC10 Orange LOW FAN RELAY
FIELD SIDE INTERFACE
Connection Color
FC16 Orange 10K NTC (REMOTE THERMISTOR INPUT)
FC17 Red
FC18 Brown
FC19 Orange 10K NTC (REMOTE THERMISTOR INPUT)
FC20 Red
FC21 Brown
FC22 Orange ANALOG OUTPUT-2
FC23 Red
FC24 Brown
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Function
EARTH GROUND
24 VAC POWER
24 VAC COMMON
HIGH FAN RELAY
MED FAN RELAY/ HEAT RELAY(STAGE 2)
COMPRESSOR CONTACTOR
HEAT RELAY(STAGE 1)/ REVERSING VALVE
24 VAC VALVE POWER
24 VAC FAN POWER
Function
GROUND
NO CONNECTION
GROUND
NO CONNECTION
ANALOG OUTPUT-1
GROUND
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LOW VOLTAGE INTERFACE
CONFIDENTIAL CONFIDENTIAL CONFIDENTIAL
Connection Color
FC11 Brown DC GROUND
FC12 Red
FC13 Orange
FC14 Yellow
FC15 Green
Function
DC OUT
S5 BUS
INPUT 1
INPUT 2