56
LP-542 REV. 7.16.15
Voltage exceeding 15V may damage internal parts. Such damages are not covered by product warranty.
PART 11 – START-UP PREPARATION
Thoroughly clean and flush any system that has used glycol before installing the boiler.
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.
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.
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. Check return Y strainer. Remove and clean sediment and debris if necessary.
4. 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 this manual.
NOTE: BOILER FAILURE DUE TO IMPROPER WATER CHEMISTRY IS NOT COVERED BY WARRANTY.
A. BOILER WATER CHEMISTRY
Chemical imbalance of your water can cause severe damage to your boiler and associated equipment, and may also affect efficiency.
You may have to have your water quality professionally analyzed to determine whether you need to install a water softener. It is
important that the water chemistry on both the domestic hot water and central heating sides are checked before installing the boiler, as
water quality will affect the reliability of the system. Outlined below are those water quality parameters which need to be met in order for
the system to operate efficiently for many years. Failure of a heat exchanger due to lime scale build-up on the heating surface,
low pH or other imbalance IS NOT covered by the warranty.
To assure good extended service life, it is recommended that you test your water quality prior to installation. Listed below are some
guidelines.
Sodium less than 20mGL.
Water pH between 6 and 8
o Maintain water pH between 6 and 8. Check with litmus paper or have it chemically analyzed by water treatment
company.
o If the pH differs from above, consult local water treatment company for treatment needed.
Hardness less than 7 grains
o Consult local water treatment companies for unusually hard water areas (above 7 grains hardness).
Chlorine concentration less than 100 ppm
o Using chlorinated fresh water should be acceptable as levels are typically less than 5 ppm.
o Do not connect the boiler to directly heat swimming pool or spa water.
o Do not fill boiler or operate with water containing chlorine in excess of 100 ppm.
NOTE: It is recommended to clean heat exchanger at least once a year to prevent lime scale buildup. To clean the heat exchanger,
follow the maintenance procedure in Part 13, Section B of this manual.
Less than 400 uS/cm at 25
o
C
Table 27 – Water Quality Requirements
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