Check Control Settings; Address Reported Problems; Inspect Boiler Area - Weil-McLain WMB-155C Manual

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AquaBalance
31 Annual startup
The boiler should be inspected and started an-
nually, at the beginning of the heating season,
only by a qualified service technician. In ad-
dition, the maintenance and care of the boiler
designated in Figure 88, page 66 and explained
on the following pages must be performed to
assure maximum boiler efficiency and reliabil-
ity. Failure to service and maintain the boiler
and system could result in equipment failure.
Electrical shock hazard — Turn off power to
the boiler before any service operation on the
boiler except as noted otherwise in this in-
struction manual. Failure to turn off electrical
power could result in electrical shock, causing
severe personal injury or death.

Address reported problems

1. Inspect any problems reported by owner and correct before
proceeding.

Inspect boiler area

1. Verify that boiler area is free of any combustible materials,
gasoline and other flammable vapors and liquids.
2. Verify that air intake area is free of any of the contaminants
listed on page 8 of this manual. If any of these are present in the
boiler intake air vicinity, they must be removed. If they cannot
be removed, reinstall the air and vent lines per this manual.
Inspect boiler exterior
1. The boiler door, panels and aesthetic parts can be cleaned
with a soft damp cloth, possibly soaked in soapy water. Do
not use any abrasive detergents and solvents.
Inspect boiler interior
1. Remove jacket door and inspect interior of boiler.
2. Vacuum any sediment from the inside of the boiler and
components. Remove any obstructions.
Do not use solvents to clean any of the boiler
components. The components could be damaged,
resulting in unreliable or unsafe operation.
Check all piping for leaks
Eliminate all system or boiler leaks. Continual fresh
make-up water will reduce boiler life. Minerals
can build up in the heat exchanger, reducing heat
transfer, overheating heat exchanger, and causing
heat exchanger failure. Leaking water may also
cause severe property damage.
1. Inspect all water and gas piping and verify to be leak free.
2. Look for signs of leaking lines in the system and in the boiler
and correct any problems found.
3. Check gas line for leaks, see page 61 for gas safety information.
Check ignition wiring
1. Check ignition cable electrical resistance. A good cable will
have resistance between 950 and 1050 ohms. Replace if not
acceptable.
2. Inspect boiler ground wire from heat exchanger access cover
to ground terminal screw.
3. Verify all wiring is in good condition and securely attached.
68
M -
ALL OUNT GAS FIRED WATER BOILER
(continued)
— C
OMBI Boiler Manual
4. Check ground continuity of wiring using continuity meter.
5. Replace ground wires if results are not satisfactory.
Check all boiler wiring
1. Inspect all boiler wiring, making sure wires are in good condi-
tion and securely attached.
2. Verify that all connectors are securely inserted.

Check control settings

1. Use the control display to navigate through all settings. Adjust
settings if necessary.
2. Check settings of external limit controls (if any) and adjust
if necessary. Adjust as needed to accommodate the system
design.
Perform startup and checks
1. Start boiler and perform checks and tests specified in this
manual.
2. Verify cold fill pressure is correct and that operating pressure
does not go too high. Adjust water pressure and expansion
tank charge pressure as necessary.
3. Complete the check-out procedure on page 65.
Check burner flame
The boiler contains ceramic fiber materials. Use
care when handling these materials per instructions
on page 67 of this manual. Failure to comply could
result in severe personal injury.
1. Inspect flame through observation window.
2. If flame is unsatisfactory at either high fire or low fire, check
combustion values. If combustion is properly adjusted, turn
off boiler and allow boiler to cool down. Then remove burner
and clean it thoroughly using a vacuum cleaner or compressed
air. Do not use compressed air to clean burner if performed
inside a building.
3. To access the burner, remove the heat exchanger cover plate
following the procedure beginning on page 85.
4. If replacing the burner, ensure the burner gasket is in good
condition and correctly positioned. Follow all instructions
on page 86 to reinstall all components.
5. Restart the boiler.
6. Inspect the flame at high and low fire. If flame is still not ac-
ceptable, check combustion values. If combustion is properly
adjusted, obtain a replacement burner from Weil-McLain.
Figure 89
Part number 550-100-305/1016