Hayward HeatPro, Owner'S Manual

Page: 26 / 43

Heat Pump Pool / Spa Heater Owner’s Manual
25
Plumbing Specifications
Typical Installation Layout
PIPING CONNECTIONS
Note : A detachable connection (union) must be utilized immediately adjacent the heater to facilitate servicing
and winterizing the unit. (See example on next page)
•
The heat pump pool heater is designed for easy piping connections into the pool water filtering system.
The pool heater condenser (heat exchanger) is provided with 1 ½” female fittings which are easily
adapted to rigid poly vinyl chloride (PVC) or flexible plastic tubing.
•
Use 2” PVC Schedule 40 piping and 2” fittings and components for building the piping system.
Components under this size will impede water flow rates and hinder the efficiency of the unit. Utilize a 2”
- 1 ½” reducer to enter the heat pump.
•
Pipefittings such as reducers, tees, and elbows cause pressure to drop as water flows through them. Plan
the plumbing layout carefully, using as few fittings as possible to connect your heat pump.
•
PIPING TO THE POOL HEATER MUST BE IN ACCORDANCE WITH APPLICABLE STATE AND
LOCAL CODES.
•
It is important that the pool heater be connected downstream from the pool pump and filter in the return
line to the pool. Connect the pipe from the filter outlet to the fitting near the bottom of the pool heater
marked "COLD WATER IN FROM PUMP"
•
THE WATER TO BE HEATED MUST ENTER THE BOTTOM OF THE HEAT EXCHANGER TO
AVOID THERMOSTAT "SHORT-CYCLING".
•
Connect the fitting near the top of the pool heater marked "HOT WATER OUT TO POOL" to the return
piping to the pool. Long runs of piping to and from pool (over 25 feet) should be insulated to prevent
heat loss to ground or air.
CAUTION:
Automatic erosion type
chlorinators, if used,
must be
installed downstream (between
the heat pump and the pool) of the
heat pump and a check valve (or
Hartford Loop) installed in a
manner that will not allow the raw
chlorine to drain back to the heat
pump when the water pump is off.
Do not allow pool maintenance
people to pour chemicals in
skimmer.
Damage to your
system and the heat pump could
result
.
NOTE
: When the piping installation
is complete, operate the pool filter
pump
with the heat pump off . Check
the entire piping system for leaks.
Observe the filter water pressure gauge
for abnormalities or obstructions in the
filtering system.