Electronic Thermostat Installation - York AFFINITY YAFT026 Installation Manual

Electrical Connections cont.
Pump Power Wiring
See Figure 14 for electrical connections from control box to pumps.
FC1/FC2 style flow centers with fixed speed pumps connect to
PB1 in the control box. If using a variable speed pump it should be
connected to L1 and L2 on the AXB.

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-conductor (4 or 5
counductor for communicating thermostats), 20-AWG (minimum)
wire. Strip the wires back 1/4-inch (longer strip lengths may cause
shorts) and insert the thermostat wires into the connector as
shown. Tighten the screws to ensure secure connections. The
thermostat has the same type connectors, requiring the same
wiring. See instructions enclosed in the thermostat for detailed
installation and operation information. The W1 terminal on
TPCM32U04AYRK 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 operate
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 compressor on the
thermostat for proper operation. SW2-7 DIP switch position is not
relevant with communicating thermostats.
AFFINITY & AFFINITY ADVANCED SINGLE & DUAL CAPACITY SERIES INSTALLATION MANUAL
Figure 14: Pump Wiring 208-230/60/1
Wire Nuts
Red
Red
Optional External
Variable Speed Loop
Pump (ex. Magna Geo)
208-230/60/1
PB1
External
Loop Pump(s)
208-230/60/1
1/2 hp Max
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
W
W1 (Optional)
15
AXB
ABC
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
CB