Aquacal Water Source WS03 Installation Manual page 89

Hard Freeze Conditions
A hard freeze is when the ambient air temperature falls below 32 degrees Fahrenheit (0° C) for more than
8 hours. In areas where this condition is prevalent and sustained, the heat pump MUST be winterized for
hard freeze conditions. Follow the correct procedure depending on the type of heat exchanger found in the
heat pump.
PLEASE NOTE - WHEN WINTERIZING WATER SOURCE UNITS
For Water Source units both the pool and the source sides must be winterized. Your
Water Source unit may have two different heat exchanger types on pool and source sides.
Be sure to properly identify and follow the correct procedure for both heat exchanger
types in your unit.
Titanium ThermoLink
1. Disconnect the plumbing to the heat pump at connection unions (removal is counter-
clockwise).
2. Allow water to drain completely from the heat pump. Expect to see a lot of water drain out at
first, and then a small amount to continue to drain out over a long period.
3. After heat pump has fully drained, partially reconnect plumbing connection unions.
4. Winterizing is complete.
5. When ready to use the heat pump again, hand-tighten connection unions. Reconnect electrical
power, and set the operating mode on the heat pump. Activate the filter pump.
®
Exchanger (with no Drain)
No Drain
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