28
Part Number 550-142-785/0812
GWI
Series 2
Gas-Fired Water Boilers –
Boiler Manual
11 Service and maintenance
continued
The boiler contains ceramic fiber and fiberglass materials. Use care when handling these materials per instructions on
page 48
of this manual. Failure to comply could result in severe personal injury.
❏
Inspect
❏
Inspect
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 condi
-
tion, 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 di-
rected under Section 7, page 20
of this manual.
Water piping
1. Check the boiler interior piping and all system piping for signs
of leaks.
2. Repair any leaks before proceeding.
Electrical shock hazard — Turn off power to the boiler
before any service operation on the boiler except as
noted otherwise in this instruction manual. Failure
to turn off electrical power could result in electrical
shock, causing severe personal injury or death.
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.
Boiler heating surfaces
1. Disconnect the vent pipe at the boiler inducer outlet connection
after turning off power to the boiler.
2. Use a bright light to inspect the flue pipe interior and inducer
interior.
3. Inspect the boiler vent outlet area and heating surfaces by
looking through the opening.
4. If the vent pipe or inducer interior show evidence of soot, fol
-
low “Cleaning boiler heating surfaces”,
page 27, to remove
the flue collector and clean the boiler if necessary after close
inspection of boiler heating surfaces. If there is evidence of
rusty scale deposits, check the water piping and control system
to make sure the boiler return water temperature is properly
maintained (per this manual).
5. Reconnect vent to inducer outlet (seal joint per
page 8
) and
replace all boiler components 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 21, item 4, page 42
).
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, making 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.
If insulation is damaged or displaced, do not oper
-
ate 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.
Condensate drain system
1. If vent system is equipped with a condensate drain, check the
hose and connections for tightness.
2. Verify the hose is unobstructed and in good condition and that
condensate can flow freely. Replace hose if necessary.
