Optional Equipment (Field Installed); Remote Water Detectors - Black Box CRCW-12 User Manual

Chapter 2: Installation

2.6 Optional Equipment (Field Installed)

NOTE: Do not mount any optional equipment on the unit access panels.

2.6.1 Remote Water Detectors

The remote water detector is normally placed on the sub-floor or in a field-supplied auxiliary drain pan located beneath the unit.
Black Box provides two types of water detectors:
Spot-type water detector: Remove the protective cover and connect two control wires to the terminals on the base. Run the
control wires into the electric box and connect them to the control terminal block as shown in the wiring diagram provided with
your unit. Replace the cover and place the water detector(s) on the floor with the metal electrodes facing down. When water is
present, current will flow between the electrodes. The base has a mounting hole in the center that you can use to secure the
water detector in place.
Figure 2-4. Spot-type water detector.
NOTE: Do not place the spot-type water detector on an electrically conductive surface.
Cable-type water detector: Lay the cable water detector flat across the sub-floor where water could collect. Secure the cable
every 12–18 inches with J-clips or cable ties with adhesive mounting pads when installing it in the airstream. Secure it at each turn
of the cable and when routing it around obstructions. Do not tie the water detector cable to a metal floor stand or to pipes.
Figure 2-5. Cable-type water detector.
When a water leak on the floor reaches the cable, current will flow between the cable wires. A two-conductor wire harness is
provided with a quick-connect fitting on the end. The harness mates to the fitting on the water detector and connects it to the
control terminal block inside the electric box as shown in the wiring diagram provided with your unit.
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