Install Instructions

Part Number 550-110-639/0512
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EGH Gas-firEd boilErs — sEriEs 4 — boilEr manual
Freeze protection (when used)
Use antifreeze especially made for hydronic systems.
Inhibited propylene glycol is recommended.
Do not use automotive, ethylene glycol
or undiluted antifreeze. Severe personal
injury, death or substantial property
damage can result.
A 50% glycol solution provides protection to about
-30°F.
Local codes may require back-flow preventer or actual
disconnect from city water supply.
Determine quantity according to system water
content. Boiler water content is listed on page 38.
Remember to add in expansion tank water content.
Follow antifreeze manufacturer’s instructions.
Filling water systems
1. Close manual air vents, drain cock, and automatic
air vent, if used.
2. Fill to correct system pressure. Correct pressure
will vary with each application. Residential sys-
tems are often designed for 12 psig of cold fill
pressure.
3. Open automatic air vent one turn, if used.
4. Open manual water feed valve.
a) Starting on lowest floor, open air vents one at a
time until water squirts out. Close vent.
b) Repeat with remaining vents.
5. Close manual water feed valve when correct boiler
pressure is reached.
6. If purge valve is used - located in the return piping
above isolation valve:
a) Connect hose to purge valve.
b) Close isolation valve. Open purge valve.
c) Open hand water feed valve and allow system to
purge all air. If system has more than one circuit,
purge each circuit separately by opening each
balancing valve one at a time.
d) Close purge valve and water feed valve cock.
e) Open isolation valve.
f) Fill system to correct pressure.
Filling steam boilers
1. Fill to normal waterline, halfway up gauge glass.
2. Boiler water pH 7.0 to 8.5 is recommended.
3. Follow skimming procedure.
Check for gas leaks
Before starting the boiler, and during initial
oper
ation, 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 sup-
plier 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.
• Propanegas can accumulateat oor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.
• Usecautionwhenattemptingtolightthepro-
pane pilot. This should be done by a qualified
service technician, particularly if pilot outages
are common.
• 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.
Fill the system
Do not fill (except for leakage tests) until
the boiler is ready to be fired.
Determine if water treatment is needed
Do not use petroleum-based cleaning or
sealing compounds in boiler system. Se-
vere damage to boiler will occur, resulting
in substantial property damage.
Eliminate all system leaks. Continual fresh
makeup water will reduce boiler life. Min-
erals can build up in sections, reducing
heat transfer, overheating cast iron, and
causing section failure.
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 of 7.0 to
8.5 is recommended.
Start-up