30
2. Do not use the boiler to directly heat swimming pool or spa water.
3. Do not fill boiler or operate with water containing chlorine in excess of 100 ppm.
Hardness:
7 grains
Chloride levels:
100 ppm
pH levels:
6-8
TDS:
2000 ppm
Sodium:
20 mGL
Clean system to remove sediment*
1. You must thoroughly flush the system (without boiler 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.
*NOTE:
It is recommended you clean heat exchanger at least once a year to prevent lime scale buildup. Follow
the maintenance procedure to clean the heat exchanger in the Maintenance Section (Part 12 of this manual).
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 instructions.
Piping components
Heating system piping:
Water boiler system piping MUST be sized per technical pipe requirements listed in Table 5 and Table 6.
Reducing pipe size can restrict flow rate through the water boiler, causing inadvertent short cycling and poor
system performance.
Check valves:
Field supplied. Check valves are recommended for installation as shown in Piping Details.
Water boiler isolation valves:
Field supplied. Full port ball valves are required. Failure to use full port ball valves could result in a restricted flow
rate through the water boiler.
Mixing valve:
Field supplied. A mixing valve is recommended when storing domestic hot water above 115°F.
Unions:
Field supplied: Recommended for unit serviceability.
DO NOT USE DIELECTRIC UNIONS!
ONLY BRASS, COPPER, OR STAINLESS STEEL.
Pressure relief valve:
Factory supplied on Boiler. The pressure relief valve is sized to ASME specifications. Storage tank may require
additional relief valves depending on local codes.
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