15
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 of the
contactor as shown in Figure 13B for single-phase unit. Consult
the Unit Electrical Data in this manual for correct fuse sizes.
Open lower front access panel. Insert power wires through
knockouts on lower left side of cabinet. Route wires through left
side of control box and connect to contactor and ground (Figure
13B).
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
SW2-4 and 5 to cycle the relay with blower, compressor, or control
a slow opening water valve. The relay contacts are available on
terminals #1 and #3 of P2.
208 Volt Operation
All 208/230 units are factory wired for 230 volt operation. For
208 volt operation, the red and blue transformer wires must be
switched on terminal strip PB2.
Figure 13B:
Line Voltage 208-230/60/1 control box
Figure 13A:
Wire access
Electrical Connections
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.
Figure 14: Pump Wiring 208-230/60/1
L2
L1
L1
L2
PB1
1
2
2
1
PB1
External
Loop Pump(s)
208-230/60/1
1/2 hp Max
LX SERIES INSTALLATION MANUAL
Summary of Contents for LX series
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