Water Piping; Boiler Heating Surfaces; Reported Problems; Boiler Area - Williamson-Thermoflo GWA 3 Series Manual

12 Service and maintenance
The boiler should be inspected and started
annually, at the beginning of the heating season,
only by a qualified service technician. In addition,
the maintenance and care of the boiler designated
in Table 6, page 23 and explained on the following
pages must be performed to assure maximum
boiler efficiency and reliability. 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 manual. Failure
to turn off electrical power could result in electrical
shock, causing severe personal injury or death.
The boiler contains ceramic fiber and fiberglass
materials. Use care when handling these materials
per instructions on page 52 of this manual. Failure
to comply could result in severe personal injury.
Inspect . . . . . . . . . .
o

Reported problems

Inspect any problems reported by owner and correct before
proceeding.

Boiler area

1. Verify that boiler area is free of any combustible materials,
gasoline and other flammable vapors and liquids.
2. Verify that boiler area (and air intake) is free of any of the
contaminants listed in Table 2 on page 5 of this manual.
If any of these are present in the boiler intake air vicinity,
they must be removed. If they cannot be removed, install
combustion air piping to the boiler in accordance with
national, provincial or local codes.
Air openings
1. Verify that combustion and ventilation air openings to the
boiler room and/or building are open and unobstructed.
Check operation and wiring of automatic combustion air
dampers, if used.
2. Verify that boiler vent discharge and air intake are clean
and free of obstructions.
Flue gas vent system
1. Visually inspect entire flue gas venting system for blockage,
deterioration or leakage. Repair any joints that show
signs of leakage in accordance with vent manufacturer's
instructions.
2. Verify that masonry chimneys are lined, lining is in good
condition, and there are not openings into the chimney.
Failure to inspect for the above conditions and
have them repaired can result in severe personal
injury or death.
Pilot and main burner flames
1. Visually inspect pilot burner and main burner flames as
directed under Section 7, page 24 of this manual.
Part Number 550-142-320/0720
GWA Series 3 Gas-Fired Water Boilers – Boiler Manual
continued
Inspect . . . . . . . . . .
o

Water piping

1. Check the boiler interior piping and all system piping for
signs of leaks.
2. Repair any leaks before proceeding.

Boiler heating surfaces

1. Disconnect the vent pipe at the boiler draft hood and re-
move draft hood after turning off power to the boiler.
2. Use a bright light to inspect the boiler flue collector and
heating surfaces.
3. If the vent pipe or boiler interior surfaces show evidence
of soot, follow "Cleaning boiler heating surfaces" in this
manual section, page 35. Remove the flue collector and
clean the boiler if necessary after closer inspection of boiler
heating surfaces.
4. If there is evidence of rusty scale deposits on boiler sur-
faces, check the water piping and control system to make
sure the boiler return water temperature is properly main-
tained (per this manual).
5. Reconnect vent and draft hood. Replace all boiler compo-
nents before returning to service.
6. Check inside and around boiler for evidence of any leaks
from the boiler. If found, locate source of leaks and repair.
Burners and base
1. After turning off power to the boiler, remove the jacket door
and base access panel (Figure 29, item 4, page 46).
2. Inspect burners and all other components in the boiler base.
3. If burners must be cleaned, raise rear of each burner to
release from support slot, slide forward and remove. Then
brush and vacuum the burners thoroughly, making sure all
ports are free of debris. Carefully replace all burners, mak-
ing sure burner with pilot bracket is replaced in its original
position and all burners are upright (ports up).
4. Inspect the base insulation.
a. Verify that the insulation is intact and secure against all
four sides of the base.
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 or boiler leaks. Continual fresh
makeup water will reduce boiler life. Minerals can
build up in sections, reducing heat transfer, over-
heating cast iron, and causing section failure. Leak-
ing water may also cause severe property damage.
The boiler contains ceramic fiber and fiberglass
materials. Use care when handling these materials
per instructions on page 52 of this manual. Failure
to comply could result in severe personal injury.
If insulation is damaged or displaced, do not
operate the boiler. Replace or reposition insulation
as necessary. Failure to replace damaged
insulation can result in a fire hazard, causing
severe personal injury, death or substantial
property damage.
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