Swimming Pool Heat Pumps: Plumbing - Hayward HP65A Manuel D'instructions

3. INSTALLATION AND CONNECTION

3.4 Swimming Pool Heat Pumps: Plumbing

The Swimming Pool Heat Pumps exclusive rated flow titanium heat exchanger requires
no special plumbing except bypass (please set the flow rate according to the
nameplate). The water pressure drop is less than 1.5psi (10KPa) at maximum flow
rate. Since there are no residual heat or flame temperatures, the unit does not need
copper heat sink piping. PVC pipes can be run straight into the unit.
Location: connect the unit in the pool pump discharge (return) line downstream of all
filter and pool pumps, and upstream of any chlorinators, ozonators or chemical pumps.
*You will need to use 1½" male PVC adapter to connect to heat pump.
Consider adding a quick coupler fitting at the unit inlet and outlet to allow easy draining
of the unit for winterizing and to provide easier access should servicing be required.
Condensation: since the heat pump cools the air down about 4-5°C, water may
condense on the fins of the horseshoe shaped evaporator. If the relative humidity is
very high, this could be as much as several litres an hour. The water will run down the
fins into the basepan and drain out through the barbed plastic condensation drain fitted
on the side of the basepan. This fitting is designed to accept 3/4" clear vinyl tubing
which can be pushed on by hand and run to a suitable drain. It is easy to mistake the
condensation for a water leak inside the unit.
NB: a quick way to verify that the water is condensation is to shut off the unit
and keep the pool pump running. If the water stops running out of the basepan,
it is condensation. AN EVEN QUICKER WAY IS TO TEST THE DRAIN WATER
FOR CHLORINE - if there is no chlorine present, then it's condensation.
6
Horizontal view
From pump
PVC COUPLER
RECOMMENDED (Provided)
To pool