Check/Control Water Chemistry; Freeze Protection (When Used) - Pioneer PHR100-55 Instruction Manual

Do not use petroleum-based cleaning or sealing compounds in heater system. Damage to elastomer
seals and gaskets in system could occur, resulting in substantial property damage.
A. CHECK/CONTROL WATER CHEMISTRY
Water pH between 6.0 and 8.0
1. Maintain heater water pH between 6.0 and 8.0. Check with litmus paper or have chemically analyzed
by a water treatment company.
2. If the pH differs from above, consult local a water treatment company for treatment required.
Hardness less than 7 grains
Consult local water treatment companies in circumstances of unusually hard water (above 7 grains
hardness).
Chlorine concentration less than 200 ppm
1. Filling with chlorinated fresh water should be acceptable since drinking water chlorine levels are
typically less than 5 ppm.
2. Do not use the heater to directly heat swimming pool or spa water.
3. Do not fill heater or operate with water containing chlorine in excess of 200 ppm.
Clean system to remove sediment
1. You must thoroughly flush the system (without the heater connected) to remove sediment. The high-
efficiency heat exchanger can be damaged by buildup or corrosion due to sediment.
2. For zoned systems, flush each zone separately through a purge valve. (If purge valves and isolation
valves are not already installed, install them to properly clean the system.)
3. Flush system until water runs clean and you are sure piping is free of sediment.
B. FREEZE PROTECTION (WHEN USED)
1. Determine freeze protection fluid quantity following fluid manufacturer instructions. Remember to
include expansion tank water content.
2. Local codes may require back flow preventer or disconnect from city water supply.
3. When using freeze protection fluid with automatic fill, install a meter to monitor water makeup. Freeze
protection fluid may leak before water begins to leak, causing concentration to drop, reducing the freeze
protection level.
Test / replace freeze protection fluid
1. Follow fluid manufacturer instructions to verify inhibitor level and other fluid characteristics are
satisfactory.
47