Series WD3 Water Leak Detector
Specifications - Installation and Operating Instructions
Bulletin L-WD3
DWYER INSTRUMENTS, INC.
Phone: 219/879-8000
www.dwyer-inst.com
P.O. BOX 373 • MICHIGAN CITY, INDIANA 46360, U.S.A.
Fax: 219/872-9057
e-mail: [email protected]
SPECIFICATIONS
Service:
Water or conductive fluids.
Minimum Sensing Gap:
1/32˝.
Switch Type:
Battery Powered Models: SPST NO SSR; External
Powered Models: DPDT relay.
Electrical Ratings:
Battery Powered Model: Pilot duty rating 250 mA @ 24 VDC;
External Powered Models: 1A @ 24 VAC/DC.
Audible Alarm:
At least 85 dB @ 1 foot distance (depends on model).
Visual Alarm:
Red LED for water level; Yellow LED for low battery
(battery powered models only); Green LED for power condition
(external powered models only).
Temperature Limits:
32 to 122°F (0 to 50°C).
Power Requirements:
Battery Powered Model: 3V CR2450 lithium metal battery, installed
functional,
user replaceable;
External Powered Models: 11 to 27 VAC/DC.
Power Consumption:
Battery Powered Model: 0.9 mA steady state / 3.0 mA during alarm
condition;
External Powered Models: 30 mA steady state / 85 mA during alarm
condition.
Battery Life:
5 years steady state / 48 hours during alarm condition.
Electrical Connections:
4.9´ (1.5 m), 22 AWG, PVC, UL plenum rated
cable.
Enclosure Material:
ABS and polycarbonate with flammability
classification UL 94 V-0.
Enclosure Rating:
Audible Alarm Models: Water-tight up to 3/4 of the body height;
Non-Audible Alarm Models: NEMA 6P (IP 68) submersible.
Weight:
4.85 oz (137.5 g).
Agency Approvals:
CE, RoHS.
The Series WD3 Water Leak Detector
protects equipment from water
damage by detecting the presence of water in drip pans in air handler
units, under raised floors in data centers, or on floors around sump
pumps and drains. Water is detected once it reaches a level that bridges
the two conductive strips on the bottom of the housing. Depending on the
model ordered, audible and visual alerts provide local indication of the
alarm condition and an internal switch will give remote indication or
control to prevent further build up of water.
For applications where power is not available, the Model WD3-BP-D1-A
is battery powered. Otherwise, either AC or DC supply voltages can be
used to power the water detector. The sensing height can be adjusted to
as low as 1/32˝ using the included adjustable mounting bracket. The
mounting bracket can attach to any flat surface by either using the
attached adhesive strips or mounting screws.
INSTALLATION
Mounting
The Series WD3 mounts horizontally using an adjustable mounting
bracket that allows detection from 1/32˝ up to 17/32˝. The tabs on the side
of the water detector fit into the slots on the bracket as shown in Figure
1. The mounting bracket mounts to the drip pan or flat surface by either
the attached adhesive strips or using two #6 or #8 screws.
5/16
[7.52]
4-1/8
[105.23]
1-3/16
[30.12]
2
[50.66]
5/8
[16.18]
1/8
[2.50]
5/8
[16.58]
1-5/16
[33.15]
3
[76.68]
3-5/8
[91.70]
Before attaching the mounting bracket to the desired surface,
the Series WD3 will need to be attached to the mounting
bracket. The adhesive is very strong and is not easily removed once attached.
NOTICE
Mounting
Slots
WD3
Bracket
WD3-BP
WD3-LP
Figure 1: Mounting WD3 to Mounting Bracket
