RELAY PANEL
18-HD68D1-10 19
4- 2 STAGE HEAT PUMP W/GAM5B MODEL AIR HANDLER
NOTES:
1. Y terminal must be connected at indoor unit for
selected compressor air flow
2. Connection to X2 is not required for this
configuration
2
1
SOV
STG2
STG1
STG1
STG3
STG2
FAN
PWM
HUM
HUM
AUX1
AUX1
AUX2
AUX2
24V
ONL
Y
24V
ONL
Y
24V
ONL
Y
O
Y1
Y2
W1
W2
W3
G
BK
HUM*
HUM*
AUX1*
AUX1*
AUX2*
AUX2*
RELAY PANEL
R
B
Y
W1
W2
W3
G
INDOOR UNIT
R
X2
B
O
Y2
Y1
OUTDOOR UNIT
COMMUNICATING
CONTROL
D
R
B
D
R
B
*See note on page 7 regarding HUM and AUX
terminals.
Caution: Do not run Outdoor/Remote sensor wires in
the same bundle with HVAC wires. Also, keep away
from high voltage wiring to avoid interference.
5- 1 STAGE HEAT PUMP W/GAF2-S MODEL AIR HANDLER
NOTES:
1. Connection to X2 is not required for this
configuration
1
SOV
STG2
STG1
STG1
STG3
STG2
FAN
PWM
HUM
HUM
AUX1
AUX1
AUX2
AUX2
24V
ONL
Y
24V
ONL
Y
24V
ONL
Y
O
Y1
Y2
W1
W2
W3
G
BK
HUM*
HUM*
AUX1*
AUX1*
AUX2*
AUX2*
RELAY PANEL
R
B
W
G
INDOOR UNIT
R
X2
B
O
Y
OUTDOOR UNIT
COMMUNICATING
CONTROL
D
R
B
D
R
B
*See note on page 7 regarding HUM and AUX
terminals.
Caution: Do not run Outdoor/Remote sensor wires in
the same bundle with HVAC wires. Also, keep away
from high voltage wiring to avoid interference.
Diagram 6 - 1 Stage Heat Pump w/GAF2-S Model Air Handler
Diagram 5 - 2 Stage Heat Pump w/GAM5B Model Air Handler
