Instruction manual

8
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 WebMaster series controller and instruction manual. Any options or
accessories will be incorporated as ordered.
3.2 Mounting the Electronic Enclosure
The Webmaster 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 mounting holes
for maximum stability.
The enclosure is NEMA 4X rated, suitable for outdoor installation. The maximum ambient
operating temperature is 120 degrees F (49 degrees C); this should be considered if installation is
in a high temperature location.
The installation site should be in close proximity to grounded AC power, a sample of the cooling
tower water, and phone line or Ethernet hub (if applicable).
Avoid locations that are in close proximity to sources of electrical noise (motor starters, power
transformers, variable speed motor drives, radio transmitters, etc.), corrosive fumes or excessive
moisture.
The enclosure requires the following clearances:
Top: 2”
Left: 10”
Right: 4”
Bottom: 8”
3.3 Installation
Plumbing
The Webmaster series controllers are supplied with a flow switch manifold designed to provide a
continuously flowing sample of cooling water to the sensors. Please refer to Figure 1 below for a
typical installation drawing. Other options are available, but far less common. Refer to Figures 2
and 3 for drawings of intermittent sampling of small evaporative coolers, or for submersion
mounting of the sensors.
Tap off the discharge side of the recirculation pump to provide a minimum flow of 1 gallon per
minute through the flow switch manifold. The sample must flow into the bottom of the manifold in
order to close the flow switch, and return to a point of lower pressure in order to ensure flow.
Install an isolation valve on both sides of the manifold to stop flow for sensor maintenance.
IMPORTANT: To avoid damaging the female pipe threads on the supplied plumbing parts, use no
more than 3 wraps of PTFE tape and thread into the pipe FINGER tight only! DO NOT use any
pipe dope, plumber’s putty or other sealing products that contain diacetone alcohol, as these attack
the flow switch plastic! Use PTFE tape ONLY!