RELAY PANEL
18-HD68D1-10 17
2- 1 STAGE HEAT PUMP 24 VOLT w/TAM9 in Communication mode AIR HANDLER
NOTES:
1. Remove the factory installed BK jumper at the
indoorunit’s AFC board
2. YI and YO connections must be made as shown
for freeze protection and internally mounted
condensate overflow circuits to function properly
3. Wire 3rd party condensate overflow switches
between Y1 of the Relay Panel and Y of the air
board
4. Connection to X2 is not required for this
configuration
4
3
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
INDOOR UNIT
R
X2
B
O
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.
Y2
D
Diagram 1 - 1 or 2 Stage Heat Pump w/TAM7 or TAM9 in 24 volt mode Model Air Handler
Heat Pump Applications
1- 1 OR 2 STAGE HEAT PUMP W/TAM7 or (TAM9 in 24 volt mode) MODEL AIR HANDLER
NOTES:
1. Remove the factory installed BK jumper at the
indoor unit’s AFC Board
2. YI and YO connections must be made as shown
for freeze protection and internally mounted
condensate overflow circuits to function properly
3. Wire 3rd party condensate overflow switches
between Y1 of the Relay Panel and YI of the airflow
control board
4. Connection to X2 is not required for this
configuration
5. D Terminal is on TAM9 ONLY
4
3
2
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
O
R
B
YI
YO
BK
Y2
W1
W2
W3
G
INDOOR UNIT
R
X2
B
O
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.
D
Heat Pump Applications
Diagram 2 - 1 or 2 Stage Heat Pump w/TAM9 in communication mode Air Handler
