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420012001500 - 03182024 - Rev. 04
A. Check / Control Water Chemistry
To ensure extended service life, it is recommended to test water
quality prior to installation. Listed below are some guidelines.
The water must be potable, free of corrosive chemicals, sand, dirt,
and other contaminants. It is up to the installer to ensure the water
does not contain corrosive chemicals or elements that can damage
the heat exchanger. Potable water is defined as drinkable water
supplied from utility or well water in compliance with EPA secondary
maximum contaminant levels (40 CFR Part 143.3). If the water contains
contaminants higher than outlined by the EPA, water treatment is
recommended and additional, more frequent maintenance may be
required. See Table 1.
If you suspect that your water is contaminated in any way, discontinue
use of the appliance and contact an authorized technician or licensed
professional.
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. Check the return Y strainer (if installed). 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: Boiler failure due to improper water chemistry is not
covered by warranty.
NOTE: Combi Models: It is recommended to clean the DHW side
of the 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 of this manual.
B. Check for Gas Leaks
C. Freeze Protection (When Used)
NOTE: Loops Serving Indirect Water Heaters (IWHs)
Glycol used in IWH loops should be food grade propylene glycol,
FDA rated as “generally recognized as safe” (GRAS). If using a glycol /
potable water mix, the water chemistry must meet the requirements
in this manual. The glycol content of the liquid must not exceed 50%,
unless the manufacturer specifies a different ratio. Glycol should be
checked periodically to prevent it from becoming acidic. Please refer
to guidelines provided by the glycol manufacturer regarding glycol
maintenance.
NOTE: Glycol not recognized as GRAS may only be used in closed loop
CH applications.
1. Determine the freeze protection fluid quantity using total system
water content following the fluid manufacturer’s instructions.
Remember to include expansion tank water content.
2. Local codes may require back flow preventer or actual disconnect
from city water supply.
3. When using freeze protection fluid with automatic fill, install a
water meter to monitor water makeup. Freeze protection fluid may
leak before the water begins to leak, causing concentration to drop,
reducing the freeze protection level.
4. Glycol in hydronic applications should include inhibitors that
prevent the glycol from attacking metallic system components.
Make certain that the system fluid is checked for the correct glycol
concentration and inhibitor level.
5. The glycol solution should be tested at least once a year or as
recommended by the glycol manufacturer.
CAUTION
CAUTION
WARNING
WARNING
WARNING
Thoroughly clean and flush any system that has used glycol before
installing the boiler. Provide the customer with a material safety data
sheet (MSDS) on the fluid used.
Before starting the boiler, and during initial operation, smell
near the floor and around the boiler for gas odorant or any
unusual odor. Remove boiler front door and smell interior of
boiler enclosure. Do not proceed with startup if there is any
indication of a gas leak. Repair any leaks at once.
NEVER use automotive or standard glycol antifreeze. Do
not use 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 the
fluid manufacturer’s literature. Thoroughly clean and flush any
system that has used glycol before installing the new boiler.
Provide the boiler owner with a material safety data sheet
(MSDS) on the fluid used.
PROPANE BOILERS ONLY – The propane supplier
mixes an odorant with the propane to make its presence
detectable. In some instances the odorant can fade, and
the gas may no longer have an odor. Before startup (and
periodically thereafter), have the propane supplier verify
the correct odorant level in the gas.
If you discover any evidence of a gas leak shut down the boiler at
once. Find the leak source with a bubble test and repair immediately.
Do not start the appliance again until the leak is repaired. Failure to
comply could result in substantial property damage, severe personal
injury, or death.
Chemical imbalance of the water supply may affect efficiency and
cause severe damage to the appliance and associated equipment.
It is important that the water chemistry on both the domestic hot
water and central heating sides are checked before installing
the appliance. Water quality must be professionally analyzed
to determine whether it is necessary to treat the water. Various
solutions are available to adjust water quality. Adverse water
quality will affect the reliability of the system. In addition, operating
temperatures above 135oF will accelerate the build-up of lime scale
and possibly shorten appliance service life. Failure of an appliance
due to lime scale build-up, low pH, or other chemical imbalance IS
NOT covered by the warranty.
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.
Part 10 - Start-Up Preparation
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