Installation and User Guide
12
Pub. No. 18HD50D1-1A-EN 12/2018
Part No. 37-7768003
NOTES:
1) Wire third party condensate overflow
switches between Y of the thermostat
and Y1 of the airflow control board
2) X2 is required to energize aux heat
during defrost
Heat Pump with GAT2, GAM2, TEM3, TEM4
Indoor Unit
Outdoor Unit
Thermostat
Rc
Rh
O/B
Y
G
W/E
C
L
Y2
W2
R
O
G
W
B
B
X2
Y/Y1
R
W2
W2
NOTES:
1) Wire third party conden-
sate overflow switches
between Y of the thermo-
stat and Y1 of the airflow
control board
2) X2 is required to energize
aux heat during defrost
1 or 2 Stage Heat Pump with GAM5A OR TAM4 OR GAF2-36M
Indoor Unit
Outdoor Unit
Thermostat
Rc
Rh
O/B
Y
G
W/E
C
L
Y2
W2
R
O
G
W1
B
B
X2
Y/Y1
R
W2
W3
Y2
Y2
Y0
O
Y1
