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Operating Modes
COOLING OPERATING MODE
Operation Mode
INPUTS/OUT-
Y1
W1
PUTS "
Cooling Mode
OFF
Cooling
X
DEMAND DEFROST CONTROL INTERNAL RELAY CONTACT STATUS
1. K1 relay contact remain closed.
2. K2 relay contact (two sets) remain open.
3. Reversing valve is energized through room thermostat.
4. K3 relay contact close to energize compressor contactor.
5. K4 relay contact remain open.
EXCEPTIONS
Low or high pressure switch open or five (5) strike pressure switch lockout or anti−short delay (five
minutes) active.
506212−01 11/10
K4
K3
K2
ComfortSense®
W2
O
G
E
L
X
X
X
K1
K2
Gas Furnace
Y1
Y2
W1
W2
G
X
X
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Dedicated Heat Pump (XPG15)
W
RL/
O
Y1
O
IN
K229
X
X
X
X
Y1
W
OUT
OUT
X
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