Installation manual

14
PREMIER INSTALLATION MANUAL
Figure 14: Line Voltage 208-230/60/1 Control Box
Electrical Connections
General
Be sure the available power is the same voltage and phase as that shown on the unit serial plate. Line and low voltage
wiring must be done in accordance with local codes or the National Electric Code, whichever is applicable.
Unit Power Connection
Connect the incoming line voltage wires to L1 and L2 or L1, L2, and L3 of the contactor as shown in Figures 14 and 15.
(For more information, refer to the Unit Electrical Data section in the Specifi cation Catalog SP1555.)
External Loop Pump Power Connection
If the unit is to be used with an external loop pump (FC1 or FC2 fl ow center), the pump(s) will be connected to the terminals
on PB1 in the unit electrical box as shown in Figures 14 and 15. The pumps will automatically be cycled as required by the
unit or by an SL signal from another Premier unit sharing the fl ow center.
Accessory Relay
A set of “dry” contacts has been provided to control accessory devices, such as 2-wire water solenoid valves on open
loop installations, electronic air cleaners, humidifi ers, 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. The default value of the switch is set to operate with fan. For use with electronic air fi lter.
208 Volt Operation
All Premier units are factory wired for 230 volt operation. There is a switch located on the control box which allows the
installer to select 208 volt unit operation. Refer to Figures 14 and 15 below for switch location.
Compressor
Contactor
Transformer
External Loop Pump(s)
208-230/60/1
1/2 HP Max
Voltage
Selection
Rocker Switch
PS
PB1
Ground
Lugs
Unit Control
Board
208-230/60/1
Service with
Ground
L1
L2
D
C
A
Compressor
Capacitor
Transformer
External Loop Pump(s)
208-230/60/1
1/2 HPMax
Voltage
Selection
Rocker Switch
PS
PB1
Ground
Lugs
Unit Control
Board
208-230/60/3
Service with
Ground
L1
L2
D
C
A
L3
Compressor
Contactor
Figure 15: Line Voltage 208-230/60/3 Control Box