Winterizing - Waterco Electroheat SubZero Supplementary User And Care Manual Manual

Winterizing

If the unit is stored in a place where the temperature drops below the freezing point of 0°C, it is
mandatory that the water accumulated in the unit be drained completely before freezing
weather prevails. The water piping MUST be disconnected to drain the heat exchanger in
preparation for winter. Once the piping is disconnected, the unit MUST be emptied by tilting
it (75°) until all the water is out. It is recommended to rinse the inside of the heat exchanger
with a garden hose and to drain the unit once more. With the help of pool return winter plugs,
block the water Inlet and Outlet connections to prevent access by vermin. DO NOT leave the
water piping connected to the unit for the winter.
It is also possible to fill the heat exchanger with pool anti-freeze only, but ensure
that the anti-freeze contains an elevated pH to prevent corrosion. This is optional
and requires appropriate hardware.
VITAL
!
SUBZERO: WHEN CLOSED TO OR UNDER FREEZING POINT, WATER CIRCULATION TO
THE HEAT PUMP MUST NEVER BE STOPPED FOR MORE THEN 5 HOURS WITHOUT
COMPLETELY DRAINING THE HEAT EXCHANGER.