Electronic Thermostat Installation - Geostar ASTON SERIES Installation Manual

Electrical Connections cont.
Pump Power Wiring
See Figure 11 for electrical connections from control box
to pumps.
FC1/FC2 style flow centers with fixed speed pumps connect to
PB1 in the control box.

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.
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.
ASTON INDOOR SPLIT SERIES INSTALLATION MANUAL
Figure 11: Pump Wiring 208-230/60/1
PB1
External
Loop Pump(s)
208-230/60/1
1/2 hp Max
Figure 12: Thermostat Wiring (Y1 Style Signals)
R
C
Y1
Y2
W
O
G
L
15
24VAC (Hot)
24VAC (Common)
Compressor (1st Stage)
Compressor (2nd Stage)
Aux. Heat
Reversing Valve
Blower Relay
System Monitor
CB