Installation Guide
10
18-HD68D1-10
Diagram 5 - 2 Stage Cooling w/GAM5B Model Air Handler
1
2
*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.
4- 2 STAGE COOLING W/GAM5B MODEL AIR HANDLER
NOTES:
1. Y terminal must be connected at indoor unit for
selected compressor air flow
2. R connection at outdoor unit is required only for two
compressor / two stage units
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
R
B
Y
W1
W2
W3
G
INDOOR UNIT
B
Y1
Y2
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 COOLING W/GAF2-S MODEL AIR HANDLER
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
B
Y
OUTDOOR UNIT
COMMUNICATING
CONTROL
D
R
B
D
R
B
Diagram 6 - 1 Stage Cooling w/GAF2-S Model Air Handler
