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• It is important to operate and maintain the filter according to the manufacturer's specifications.
As a filter gets dirty, the water flow to the heat pump is reduced. The higher the pressure on the
filter gauge, the lower the flow rate.
• Similar to a dirty filter, large amounts of debris in the pump basket can reduce water flow. Keep
basket free of debris.
• Check for improper valve settings. A partially closed valve after the filter, or a full-open bypass
around the heater, will cause insufficient water flow through heater.
• If the conditions listed above remain unresolved, the water flow through the heater may be
reduced to a point where internal safety devices shut the heater off.
• Before calling for service, always check the filter, the pump basket, and water valve positions. If
the problem persists, please call AquaCal Customer Support at: (800)786-775.
Maintain Proper Water Flow
Control Water Chemistry
• IMPORTANT! All AquaCal heat pumps are engineered for exceptional durability and reliability.
And, this heater—being equipped with a titanium heat exchanger—will be nearly impervious to
water chemistry damage. However, the remainder of the pool/spa equipment may be
susceptible to damage from prolonged exposure to unbalanced water chemistry. Likewise,
bathers may be exposed to health risks if water chemistry is not properly maintained.
• For the longevity of the entire pool/spa installation, and for the safety of bathers, it is strongly
recommended the water chemistry be checked regularly and maintained within proper norms.
Please see the table, below, for a complete listing of recommended water chemistry levels.
CAUTION- Pool/Spa Refinishing Operations
During pool refinishing or acid cleaning, the water flow through the heater must be shut off. Water
flow to the heater must remain off until water chemistry is once again in balance and the water is
clear in appearance. Failure to follow these instructions may void heater warranty.
Chlorine . . . . . . . . . . . ........ . . .:
Bromine . . . . . . . . . . . . ........ . .:
pH . . . . . . . . . . . . . . . . . . ..........:
Total Alkalinity . . . . . . . . . ........:
Calcium Hardness . . . . . . . .....:
Total Dissolved Solids . . . . .....:
1.0 – 3.0 ppm in pools, 1.5 – 3.0 ppm in spas
2.0 – 4.0 ppm in pools, 3.0 – 5.0 ppm in spas
7.4 – 7.6 ppm in pools, 7.2 – 7.8 ppm in spas
80 – 140 ppm in pools, 80 – 120 ppm in spas
200 – 400 ppm in pools and spas
1,000 – 2,000 ppm in pools,
1,500 ppm above start-up TDS in spas
RECOMMENDED WATER CHEMISTRY STANDARDS
MAINTENANCE
& OPERATION (continued)
