Start-Up - Weil-McLain EG 5 Series Manual

EG PEG
&
SERIES

Start-up

Wiring multiple zones
Refer to zone valve manufacturer's literature for wiring
and application. A separate transformer is required to
relay for each circulator.
using 3-wire zone valves, install an
isolation relay. Connect the zone
valve end switch wires to the isolation
relay coil. Connect the isolation
relay contact across the boiler T-T
terminals. Failure to comply can result
in damage to boiler components or
cause unreliable operation, resulting
in severe property damage.
Check for gas leaks
Be
fore starting the boiler, and during initial
ation, smell near the floor and around
oper
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.
Smell near the floor for the gas odorant or
any unusual odor. If you suspect a leak, do not
attempt to light the pilot.
pane pilot. This should be done by a qualified
service technician, particularly if pilot outages
are common.
gas.
make sure all gas piping is leak-tight.
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
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5 EGH 5
SERIES
. When
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GAS FIRED BOILERS
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.
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.
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 systems 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.
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BOILER MANUAL
Part Number 550-142-782/1112