Comfort-Aire HBH Series 6-10 Tons - Manual (Page 23)

Heat Controller, Inc. HBH SERIES IOM Manual
22
Figure 16: Thermostat Connection
Electrical - Thermostat Wiring
ATP32U03 Thermostat
Connection to CXM Control
Compressor-Stage 1
Reversing Valve
Fan
24Vac Hot
Y1
Y2
O
G
R
Y
O
G
R
CXM1
Y
O
G
R
CXM2
24Vac Com C C
Compressor-Stage 2
C
AL AL AL
ATP32U03 Thermostat
Connection to DXM Control
Compressor-Stage 1
Reversing Valve
Fan
24Vac Hot
Y1
Y2
O
G
R O
G
R
DXM1
Y
O
G
R
DXM2
24Vac Com C C
Compressor-Stage 2
C
AL1 AL1 AL
Y1
Y2
COM 2 COM 2
Field Wiring
Factory Wiring
Thermostat Installation - The thermostat should be located
on an interior wall in a larger room, away from supply duct
drafts. DO NOT locate the thermostat in areas subject to
sunlight, drafts or on external walls. The wire access hole
behind the thermostat may in certain cases need to be
sealed to prevent erroneous temperature measurement.
Position the thermostat back plate against the wall so that it
appears level and so the thermostat wires protrude through
the middle of the back plate. Mark the position of the back
plate mounting holes and drill holes with a 3/16” (5mm)
bit. Install supplied anchors and secure plate to the wall.
Thermostat wire must be 18 AWG wire. Wire the appropriate
thermostat as shown in Figure 16 to the low voltage terminal
strip on the CXM control board. Practically any heat pump
thermostat will work with Heat Controller units, provided it
has the correct number of heating and cooling stages.