Weil-McLain CGA 2 Series Installation And Maintenance Manual page 28

COa Series 2 Gas-Fired Water Boiler - Boiler Manual
6a
Start-up - preparation
Checkforgasleaks
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28
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.
Detennine if water treatment is needed
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Do not use petroleum-based cleaning 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 water conditions (below 7.0). Boiler
water pH of7.0 to 8.5 is recommended.
Freeze protection (when used)
Use antifreeze made especially for hydronic systems. Inhibited propylene
glycol is recommended.
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Do not use ethylene glycol, automotive or undiluted
antifreeze. Severe personal injury or death can result.
I. Determine antifreeze quantity according to system water content.
Boiler water content is listed on page 65. Remember to include e>.-pan-
sion tank water content.
2. Follow antifreeze manufacturer's instructions.
3. A 50% solution of propylene glycol/water provides maximum protec-
tion to about -30°F.
4. Local codes may require baCk !low 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 be-
gins to leak, causing glycol level to drop. Added water will dilute the
antifreeze, reducing the freeze protection level.
Part Number 550-142-779/0712