Light Freeze: Air temperature does not remain below 32°F for more than 4 hours.

In the event that your heater will not be used for an extended period, it is receommended that pool water be allowed to circulate through the heater during normally scheduled filtration cycles.  If light freeze conditions are expected, adjust water pump controls for continuous operation throughout the light freeze episode. Moving water will not freeze under light-freeze conditions.

CAUTION: In areas where hard freeze conditions are prevalent, please refer to winterizing instructions following this section:

• Winterizing a Titanium Equipped Heat Pump - Hard Freeze Conditions

• Winterizing a Cupronickel Equipped Heat Pump - Hard Freeze Condition