21
Maintenance
Water Chemistry
Proper chemical balances are necessary for sanitary bathing conditions as well as ensuring your heat pump’s long
life.
Be sure to keep your chemical and mineral concentration levels within the values indicated in the table below. Failure
to maintain proper water chemistry may cause damage to the heat pump and may void the warranty.
Winterizing
Failure to winterize could cause damage to the heat pump and will void the warranty
In areas where freezing temperatures occur, you should protect your pump, filter, and heat pump from the elements.
Perform the following steps to completely drain the heat pump.
1 Turn off the electrical power to the heat pump at the main breaker panel.
2 Shut off the water supply to the heat pump.
3 Disconnect the water inlet and outlet unions located on the rear panel of the heat pump.
4 Blow out the water lines.
5 Cover only the heat pump to prevent debris from falling into the unit. A winterizing cover is available as an
accessory (see spare part list on page 28)
Spring Start Up
If your heat pump has been winterized, perform the following steps when starting the system in the Spring:
1 Uncover the heat pump and inspect the top and sides for any debris or structural problems.
2 Connect the water inlet and outlet unions on the sides of the heat pump.
3 Turn on the filter pump to supply water to the heat pump. Open the filter air bleeder and circulate water through
the system long enough to bleed all the air out of the pool system. Check for leaks in and around the heat pump.
4 Turn on the electrical power to the heat pump at the main breaker panel.
Inspection and Service
Pentair Heat Pumps are designed and constructed to provide long performance life when installed and operated
properly under normal conditions.
Periodic inspections are important to keep your heat pump running safely and efficiently through the years. Failure
to properly maintain your unit can void the warranty.
Test
Recommended Level
Free Chlorine 1.0 to 3.0 ppm (3.0 to 5.0 spa)
2.0 to 4.0 ppm (3.0 to 5.0 spa)
Total Alkalinity (TA) Calcium, Lithium, and
Sodium Hydrochlorite
80 to 100 ppm
Total Alkalinity (TA) Sodium Dichlor,
Trichlor, Chlorine Gas
100-120 ppm
Cyanuric Acid 30 to 50 ppm **
Total Dissolved Solids (TDS) Less than 2000 ppm
Copper 0 ppm
* Concentration levels taken from “Basic Pool and Spa Technology” published by NSPI
(National Spa and Pool Institute).
** no cyanuric acid is allowed for systems using redox sensors like IntelliPool
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