Page 45
XPG15 SERIES
HEATING OPERATING MODE ROOM THERMOSTAT DEMAND FOR Y1 WITH OUTDOOR TEMPERATURE
ABOVE 32ºF (OºC)
K1
K2
K2
K3
K4
Operation Mode
ComfortSense®
Gas Furnace
Dedicated Heat Pump (XPG15)
INPUTS/OUT-
PUTS
"
Y1
W1
W2
O
G
E
L
Y1
Y2
W1
W2
G
O
Y1
W
IN
RL/
K229
O
Y1
OUT
W
OUT
Heating Mode (Outside Temperature above 32ºF)
First Stage Heat-
ing (Heat Pump)
X
X
X
X
X
X
DEMAND DEFROST CONTROL INTERNAL RELAY CONTACT STATUS
1. K1 relay contact remain closed.
2. K2 relay contact (two sets) remain open.
3. K3 relay contact close to energize compressor contactor.
4. K4 relay contact remain open.
5. K229 relay normally closed contacts remain closed.