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1. Remove chiller access panel.
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 the adjustment wheel on the switch. Keep
turning the wheel until the chiller indicates it is receiving
water. The display will no longer display the
FLO
code.
6. Deactivate filter pump. If correctly adjusted, the chiller will
deactivate and the display will show the
FLO
code.
7. Re-install chiller access panel.
8. If the chiller continues to operate without water flow, the installation of a grid flow switch may be required.
l
This can become necessary if the chiller is installed below the elevation of the body of water to be cooled.
The standing pressure from the water can cause the water pressure switch to activate when the circulation
pump is off. Therefor a water
flow switch must be used in place of a water pressure switch to determine if
incoming water is being sent to the chiller.
See "Grid Flow Switch (# 0040S)" on page 27.
9. If chiller continues to operate without water flow, contact AquaCal
®
.
1.5 Electrical
1.5.a Electrical Requirements
WARNING
Failure to heed the following may result in injury or death.
l
The information contained in this section is intended for use by qualified electricians familiar with electrical
service-industry safety standards and methods.
l
Locate the equipment disconnect as near to the chiller as possible. Always satisfy applicable codes and standards.
l
Never mount power-disconnects directly to the chiller.
l
In sizing power wiring, be especially aware of up-sizing requirements necessary due to wiring distances. Always
satisfy applicable codes and standards.
l
AquaCal
®
chillers are designed to use copper conductors, only. Do not use aluminum wire.
l
Multiple chillers installed at the same site may benefit from automatic sequencing controllers (ASC) to avoid
excessive power drops at start-up.
