RELAY PANEL
18-HD68D1-10 9
2
1
*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.
2- 1 STAGE COOLING W/GAM5A OR TAM4 MODEL AIR HANDLER
NOTES:
1. YI and YO connections must be made as shown for
freeze protection and internally mounted condensate
overflow circuits to function properly
2. If 3rd party overflow condensate switches are
installed, wire between Y1 of the Relay Panel and
YI of the 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
O
R
B
YI
YO
W1
W2
W3
G
INDOOR UNIT
B
Y
OUTDOOR UNIT
COMMUNICATING
CONTROL
D
R
B
D
R
B
Diagram 3 - 1 Stage Cooling w/GAM5A or TAM4 Model Air Handler
Diagram 4 - 1 Stage Cooling w/GAM5B Model Air Handler
1
*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.
3- 1 STAGE COOLING W/GAM5B MODEL AIR HANDLER
NOTES:
1. Y terminal must be connected at indoor unit for
selected compressor air flow
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
O
R
B
Y
W1
W2
W3
G
INDOOR UNIT
B
Y
OUTDOOR UNIT
COMMUNICATING
CONTROL
D
R
B
D
R
B
