Aquacal Heat Pump User Manual

24

 (continued)

1. Disconnect all electrical power to the heater; turn OFF circulating pump.

2. At the two (2) connection unions, disconnect the plumbing to the heater (removal is counter-

clockwise).

3. If your unit has an external drain plug, remove plug. This plug would be located at lower, front

corner of heater. (position may vary between models). Allow water to drain out of the condensor.
DO NOT replace plug until final winterizing step.

5. Replace the winterizing plug; thread the plug in clockwise until just snug, then apply an additional

1/8 turn. To prevent insects and vermin from entering the plumbing during the winterized period,
partially reconnect the two (2) plumbing connection unions: couple each union one or two
threads; this will permit condensation to drain, but will prevent  most insects and animals from
entering the plumbing circuit.

6.. Next Season: To ready the heat pump for use, simply retighten plumbing connection unions.

Hand-tight is generally sufficient.

4. If no external drain plug is found, it will be necessary to open access panel and see if heat

exchanger has an internal drain plug. If so, remove plug, and allow water to drain out of  the
condensor.

PLEASE NOTE - If your heat pump contains an exchanger other than what is shown above,
call AquaCal AutoPilot for alternate winterizing instructions.