Maintaining Ability To Winterize; Adjusting Water Pressure Switch - Aquacal TropiCool TC500 Installation Manual

3.3.g Maintaining Ability to Winterize
CAUTION - Failure to heed the following may result in equipment damage.
Do not use glue on the threaded portion of the equipment's unions. A glued-in-place union will prevent the
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chiller from being properly winterized.
The unions can be used to decouple the chiller from the plumbing system during hard freeze conditions. Do
not defeat the function of the unions by using glue on the threaded portion of the unions. See "Winterizing"
on page 19.
3.3.h Adjusting Water Pressure Switch
Adjust water pressure switch when chiller attempts to operate without water flow.
WARNING - Failure to heed the following may result in injury or death.
Water Pressure Switch adjustment procedure to be performed by experienced service personnel only; procedure
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must not be attempted by individuals lacking adequate electrical and mechanical experience.
CAUTION - Failure to heed the following may result in equipment damage.
If after water pressure switch adjustment the chiller continues to operate with the filter pump off, readjust water
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pressure switch to ensure chiller will not run without water flow.
Confirm the following before attempting any adjustments:
The filter is clean.
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Filter pump is operating.
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Valves are set to direct appropriate amount of water through the chiller. See "Water Flow Rates" on page 4.
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FLO code is displayed (or displays intermittently).
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Adjusting Water Pressure Switch:

1. Remove chiller access panel. See "Access Panels" on
page 27.
2. Locate the water pressure switch. It will be outside and
along the bottom edge of the electrical enclosure. Exact
location varies by model.
3. Activate filter pump.
4. Apply power to chiller.
5. Slowly rotate adjustment wheel on switch until the FLO
code just disappears.
6. Deactivate filter pump. If correctly adjusted, the chiller
will deactivate and display FLO .
7. Re-install chiller access panel.
If chiller continues to operate without water flow, contact AquaCal
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Site-specific factors may require the installation of an external flow switch. See "Available
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Accessories" on page 27.
Page - 7
Chiller with Hartford Loop
®
Technical Support.