WaterFurnace AT022C/D, Installation And Maintenance Manual

Page: 12 / 28

12
PREMIER 2 SINGLE-SPEED INSTALLATION AND MAINTENANCE MANUAL
ACCESSORY RELAY
A set of "dry" contacts has been provided to control accessory devices, such as water
solenoid valves on open loop installations, electronic air cleaners, humidifiers, etc. This relay
contact should be used only with 24 volt signals and not line voltage power. The relay has
both normally open and normally closed contacts and can operate with either the fan or the
compressor. Use DIP switch SW2-3 to cycle the relay with fan or compressor. The relay
contacts are available on terminals #2 and #3 of P3. See the wiring schematic on pages 13-16
for details.
208 VOLT OPERATION
All 208-230 volt units are factory wired for 230 volt operation. For 208 volt operation, the red
and blue transformer wires must be switched on terminal strip PS. See the wiring schematic on
pages 13-16 for details.
B
C
D
Transformer
Compressor
Contactor
Compressor
Capacitor
PS
PB
1
Ground
Lugs
Unit
Control
Board
208-230V/60/1ø
Service with
Ground
External Loop Pump (s)
208-230V/60/1ø
1/2 HP Max.
L1 L2
B
C
D
Transformer
PS
PB1
Ground
Lugs
Unit Control
Board
208-230V/60/3Ø
Service with
Ground
External Loop Pump(s)
208-230V/60/1Ø
1/2 HP Max.
L3
L2
L1
Circuit
Breaker
Compressor
Contactor
Figure 14B - Premier 2 Line Voltage 208-230/60/3 Figure 14A - Premier 2 Line Voltage 208-230/60/1