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3.0
UNPACKING & INSTALLATION
3.1
Unpacking the unit
Inspect the contents of the carton. Please notify the carrier immediately if there are any signs of damage
to the controller or its parts. Contact your distributor if any of the parts are missing. The carton should
contain: a WDT400 series controller and instruction manual. Any options or accessories will be
incorporated as ordered.
3.2
Mounting the electronic enclosure
The WDT series controller is supplied with mounting holes on the enclosure. It should be wall mounted
with the display at eye level, on a vibration-free surface, utilizing all four mounting holes for maximum
stability. Use M6 (1/4" diameter) fasteners that are appropriate for the substrate material of the wall.
The enclosure is NEMA 4X rated. The maximum operating ambient temperature is 122°F (50°C); this
should be considered if installation is in a high temperature location. The enclosure requires the
following clearances:
Top:
Left:
Right:
Bottom:
3.3
Installation
Once the WDT series controller is mounted, the metering pumps may be located at any distance from
the controller. The conductivity electrodes should be placed as close to the controller as possible, to a
maximum distance of 250 ft. Under 25 ft is recommended. The cable must be shielded from background
electrical noise. Always route low voltage (sensor) signals with at least a 6" separation from AC voltage
wiring.
Locate the electrode tees where an active sample of cooling tower water is available and where the
electrode can easily be removed for cleaning. They must be situated so that the tee is always full and the
electrode is never subjected to a drop in water level resulting in dryness. Refer to Figure 1 for typical
installation.
IMPORTANT: To avoid cracking the female pipe threads on the supplied plumbing parts, use no more
than 3 wraps of Teflon® tape and thread in the pipe FINGER tight plus ½ turn! Do not use pipe dope to
seal the threads of the flow switch because the clear plastic will crack!
2" (50 mm)
8" (203 mm)
4" (102 mm)
7" (178 mm)
4
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