Light Engineered Displays Leak Detector Cable WDC-100 - Manual (Page 2)

WDC
SERIES
CABLE WDC-100
WATER DETECTION
Installation Guidelines
1. General
a. Keep Cable clean and dry before use.
b. Do NOT install cable directly to unsealed concrete surfaces.
c. Do NOT attach cable to any surface that may form condensation.
d. Maintain a distance of 8’ away from AHU supply fans and humidifiers.
2. Installation
a. Use chalk line to mark the layout for the water detection cable.
b. Set junction boxes where shown on plans (at the beginning and end of each zone).
c. Use a pair of 18 qa. stranded THHN wired from the control panel to the start of each zone. Make sure to
identify each pair by zone number.
d. Pull a length of cable from the start to the end of each zone. Allow an extra 6” at each end for connections
in the junction boxes. Cable may be pulled under existing wire and pipe. When going over obstructions,
use a cable clamp on each side of the obstacle to ensure that the cable maintains contact with the floor.
e. Cut the cable with sharp side cutters. Tape the ends one inch below the cut to prevent the monofilament
from unraveling. Trim the excess.
f. Feed the cable ends through a non-metallic strain relief device and into the junction box.
g. Terminate the conductors on a terminal block inside the junction box. A 15K ohm resistor will need to be
installed st the end of each zone, AFTER the annunciator door is installed.
h. Install cable clamps / wire ties, evenly five feet along the entire length of cable. Clean the surface, peel
and stick the mount, place cable in mount, insert wire tie and tighten moderately. Press cable down on
either side of the clamp to insure contact with surface. Silicone adhesive can be used on clamps.
i. At the control panel, check wires with meter. The resistance should be greater than 50K ohm, with NO
E.O.L. resistor in place. A low resistance reading indicates wetness or cable damage.
j. When the cable readings are correct, proceed to Panel Installation and Testing.
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1. Water Detection Panel
2. Conduit
3. Conduit or Shielded Cable
4. Junction Box or WD-TB 5. Water Detection Sensor
6. 1’ in Front of Exterior Walls
7. 8’ in Front of HVAC Units
Typical Installation Panel
Conduit
Break-Out
Tab
Two-Conductor 18 Gauge
THHN w/ Jacket
To Control Panel
If a Conduit is Required,
Use a Single Gang Switch Box
As an Interface
1 per 5’ of Cable
Self-Stick Cable Clamp
Maximum Water Detection
Cable Length = 1000’
End Of Line
WD-TB
Terminal Block