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PART 8 – START-UP PREPARATION
A. CHECK / CONTROL WATER CHEMISTRY
It is recommended that you test your water quality prior to installation. Listed below are some guidelines.
Do not use petroleum-based cleaning or sealing compounds in the boiler system. Damage to elastomer
seals and gaskets in the system could occur, resulting in substantial property damage.
Water pH between 6.0 and 8.0
1. Maintain boiler water pH between 6.0 and 8.0. Check with litmus paper or have it chemically analyzed
by a water treatment company.
2. If the pH differs from above, consult local water treatment company for treatment needed.
Hardness less than 7 grains
Consult local water treatment companies for unusually hard water areas (above 7 grains hardness).
Chlorine concentration less than 200 ppm
1. Do not connect the boiler to directly heat a swimming pool or spa water.
2. Do not fill boiler 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 boiler connected) to remove sediment. The high-
efficiency heat exchanger can be damaged by buildup or corrosion due to sediment build up.
2. For zoned systems, flush each zone valve 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.
Test/replace freeze protection fluid
1. For systems using freeze protection fluids, follow fluid manufacturer’s instructions to verify inhibitor
level and that other fluid characteristics are satisfactory.
2. Freeze protection fluid must be replaced periodically due to degradation of inhibitors over time. Follow
all fluid manufacturer’s instructions.
B. FREEZE PROTECTION (WHEN USED)
NEVER use automotive or standard glycol antifreeze, or ethylene glycol made for hydronic systems. Use
only freeze-protection fluids certified by fluid manufacturer as suitable for use with stainless steel boilers,
verified in fluid manufacturer’s literature. Thoroughly clean and flush any system that has used glycol
before installing the new boiler. Provide boiler owner with a material safety data sheet (MSDS) on the
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