18 Culligan® High Efficiency 1.5 Water Softener
18 Cat. No. 01023552
Circuit Board Connections
The 24 Volt power supply and flow meter wire harness is already connected to the circuit board. If no other circuit board
connections are required proceed to the First Time Setup. Refer to the instructions below and Figure 21 to Figure 30 for
connecting accessories, including the Aqua-Sensor probe wire harness, to the circuit board.
WARNING! Disconnect all electrical power to the unit before connecting.
CAUTION! Grip all connections to the circuit board by the connecting terminals for assembly and
disassembly. Failure to do so could result in damage to the wire leads or connecting
terminals.
CAUTION! Do not touch any surfaces of the circuit board. Electrical static discharges might
cause damage to the board. Handle the circuit board by holding only the edges of the
circuit board. Mishandling of the circuit board will void the warranty.
NOTE Observe all state and local electrical codes.
1. Remove the electrical enclosure from the control valve. First remove the electrical enclosure screw and then
gently remove the enclosure from the control. Refer to Figure 21 and below instructions.
Figure 21. Electrical and accessory connections.
2. Disconnect the 24 Volt power supply wire harness from the circuit board. See Figure 22.
3. Grip the circuit board from the edges and gently rotate it to the back of the enclosure (you are disengaging the
circuit board from the two support pins on the bottom and top of the enclosure). See Figure 23.
4. Remove the circuit board from the enclosure.
24V Power Cord (also 2.5VAC
for optional Aqua-Sensor)
Flow Meter Wire
Harness
Electrical Enclosure
Screw
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