Water Furnace 500A11 5 Series Installation Manual - Electrical Connections Cont.

15

5 SERIES 500A11 INSTALLATION MANUAL

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.

Figure 14: Pump Wiring 208-230/60/1

R

Y1

C

W

O

G

L

24VAC (Hot)

24VAC (Common)

Compressor (1st Stage)

Aux. Heat

Reversing Valve

Blower Relay

System Monitor

 Microprocessor Controller

Thermostat Connection

Y2

Compressor (2nd Stage)

Electrical Connections cont.

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 TPCM32U03 

and TPCM32U04 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.

Figure 15a: Thermostat Wiring (Y1 Style Signals)

C

P7

P1

–

R

W

C 24VAC (Common)

R 24VAC (Hot)

B- Communication

W1 (Optional)

 Microprocessor Controller

Thermostat Connection

+

A+ Communication

TPCM32U03/TPCM32U04

Monochrome Thermostats

C

P7

–

R

C 24VAC (Common)

R 24VAC (Hot)

DX- Communication

 Microprocessor

Controller

Thermostat

Connection

+

DX+ Communication

TPCC32U01

Color Touchscreen

Thermostat

Figure 15b: Thermostat Wiring (Communicating Style Signals)

External

Loop Pump(s)

208-230/60/1

1/2 hp Max

PB1

CB

Optional External

Variable Speed Loop

Pump (ex. Magna Geo)

208-230/60/1