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Part Number 550-142-300/0520
28
CGa Series 3 Gas-Fired Water Boiler — Boiler Manual
Start-up — preparation6a
Check for gas leaks
Before starting the boiler, and during
initial operation, smell near the floor
and around the boiler for gas odorant
or any unusual odor. Do not proceed
with start-up if there is any indication
of a gas leak. Repair any leak at once.
Propane boilers only — Your propane
supplier mixes an odorant with the
propane to make its presence detect-
able. In some instances, the odorant
can fade and the gas may no longer
have an odor.
• Propane gas can accumulate at
floor level. Smell near the floor
for the gas odorant or any unusual
odor. If you suspect a leak, do not
attempt to light the pilot.
• Periodically check the odorant level
of your gas.
• Inspect boiler and system at least
yearly to make sure all gas piping
is leak-tight.
• Consult your propane supplier
regarding installation of a gas leak
detector. There are some products
on the market intended for this
purpose. Your supplier may be able
to suggest an appropriate device.
Determine if water treatment
is needed
Do not use petroleum-based clean-
ing or sealing compounds
in boiler
system. Severe damage to boiler will
occur, resulting in substantial property
damage.
Eliminate all system leaks. Continual
fresh makeup water will reduce boiler
life. Minerals can build up in sections,
reducing heat transfer, overheating cast
iron, and causing section failure.
Verify water chemistry
Consult local water treatment companies for unusually
hard water areas (above 7 grains hardness) or low pH wa-
ter conditions (below 7.0). Boiler water pH of 7.0 to 8.5 is
recommended.
Freeze protection (when used)
Use antifreeze made especially for hydronic systems. Inhib-
ited propylene glycol is recommended.
Do not use ethylene glycol, automo-
tive or undiluted antifreeze
. Severe
personal injury or death can result.
1. Determine
antifreeze quantity according to system
water content. Boiler water content is listed on page 65.
Remember to include expansion tank water content.
2. Follow antifreeze manufacturer’s instructions.
3. A 50% solution of propylene glycol/water provides
maximum protection to about -30°F.
4. Local codes may require
back flow preventer or actual
disconnect from city water supply.
5. When using antifreeze in a system with automatic fill,
install a water meter to monitor water makeup. Glycol
will leak before the water begins to leak, causing glycol
level to drop. Added water will dilute the antifreeze,
reducing the freeze protection level.
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