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DUAL COMPRESSOR PACKAGED HEAT PUMP INSTALLATION GUIDE
Electronic Thermostat Installation
Position the thermostat subbase against the wall so that it is
level and the thermostat wires protrude through the middle of
the subbase. Mark the position of the subbase mounting holes
and drill holes with a 3/16-inch bit. Install supplied anchors
and secure base to the wall. Thermostat wire must be 8-con-
ductor (4 or 5 counductor for communicating thermostats),
20-AWG (minimum) wire. Shielded wire is recommended.
Strip the wires back 1/4-inch (longer strip lengths may cause
shorts) and insert the thermostat wires into the ABC con-
nector as shown. Tighten the screws to ensure secure con-
nections. The thermostat may have either screw or spring
clip connectors, requiring the same wiring. See instructions
enclosed in the thermostat for detailed installation and op-
eration information. The W1 terminal on TPCM32U03A and
TPCM32U04A communicating thermostats may be hard wired
to provide aux/emergency heat in the event communication is
lost between the thermostat and the ABC microprocessor.
NOTE: Aurora Base Control (ABC) DIP switch SW2-7 is
required to be in the "OFF" position for the control to oper-
ate with FaultFlash or ComforTalk thermostats. SW2-7 in the
"ON" position configures the control to operate with typical
thermostats (continuous lockout signal). There must be a wire
connecting Y2 on the Aurora controller to 2nd stage compres-
sor on the thermostat for proper operation. SW2-7 DIP switch
position is not relevant with communicating thermostats.
Figure 15a: Thermostat Wiring (Y1 Style Signals)
R
C
Y1
Y2
W
O
G
L
Figure 15b: Thermostat Wiring (Communicating Style Signals)
P7
C
C 24VAC (Common)
R
R 24VAC (Hot)
–
B- Communication
+
A+ Communication
P1
W1 (Optional)
W
16
24VAC (Hot)
24VAC (Common)
Compressor (1st Stage)
Compressor (2nd Stage)
Aux. Heat
Reversing Valve
Blower Relay
System Monitor
P7
C
C 24VAC (Common)
R
R 24VAC (Hot)
–
DX- Communication
+
DX+ Communication
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