36
UltraTemp
®
Heat Pump Installation and User’s Guide
Section 4
General 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 Table 1.
Failure to maintain proper water chemistry may cause damage to the heat pump
and may void the warranty.
Table 1. Optimal Water Chemistry Ranges
NOTE:
For spas, it is also necessary to perform water changes in addition to chemical treatment. It is
recommended to change the spa water every 60 days for light usage and every 30 days if usage is heavy.
Winterizing
CAUTION
—
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, fi lter, and heat pump from the elements.
Perform the following steps to completely drain the heat
pump, see
Figure 22
.
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 lower front panel of the heat pump.
4. Blow out the water lines.
5. Cover only the top of the heat pump to prevent debris
from falling into the unit. Do not wrap the sides of the
heat pump with any plastic or other material that will
retain heat or moisture inside the unit.
Test
Recommended Level
Free Chlorine
or
1.0 to 3.0 ppm (3.0 to 5.0 spa)
Bromine
2.0 to 4.0 ppm (3.0 to 5.0 spa)
pH
7.4 to 7.6
Total Alkalinity (TA)
80 to 120 ppm
Calcium Hardness (CH)
200 to 400 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).
Water
Outlet Union
Water
Inlet Union
Figure 22.