23
IV. Service
1
GENERAL — Inspection should be conducted
annually. Service as frequently as specifi ed in
paragraphs below. While service or maintenance is
being done, Electrical Power and all Gas Supply to the
Boiler must be “off.”
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2
VENT
SYSTEM
—
Vent
system (see Figure 4 for
typical installation) should be checked annually for:
a. Obstructions
b. Accumulations of soot
c. Deterioration of vent pipe or vent accessories due to
condensation or other reasons
d. Proper attachment of vent cap and sealant around
wall penetration
e. Remove vent cap and clean accumulations of
soot and dirt with wire brush and vacuum. See
Figure 16. Remove any obstructions. Replace all
deteriorated parts.
3
CLEANING BOILER FLUES (See Figure 16).
Flue passageways in the boiler sections should be
checked annually for any blockage or accumulation of
soot. To obtain access to fl ueways:
a. Remove jacket front panel.
b. Remove sheet metal screws securing combustion
area enclosure cover and remove cover. Exercise
care when removing to prevent damage to enclosure
gasket.
c. Remove fan assembly after disconnecting electrical
leads and vent tube. Care should be exercised to
avoid damage to gaskets.
d. Remove four (4) bolts securing canopy and remove
canopy — fl ueways are now exposed.
Using
a
fl ashlight, examine all fl ue passageways.
If passageways are free of soot and obstruction,
replace canopy, secure and seal using kit available
from Burnham distributors.
e. Replace fan, connect vent tube and electrical wiring.
f. Reinstall and secure enclosure cover and jacket front
panel.
If
the
fl ue passageways need cleaning, remove
burners as described in paragraph 4 below. Using
long handle wire or bristle fl ue brush and vacuum,
brush fl ueways thoroughly from top of boilers as
illustrated in Figure 16. Replace canopy and seal.
4
BURNERS AND FIREBOX SHOULD BE
CLEANED ANNUALLY
a. Remove jacket front panel.
b. Remove sheet metal screws securing enclosure
cover and remove cover exercising care with gasket.
c. Remove TCO leads from TCO and remove burner
access panel.
d. Brush top of burner with a soft bristle brush and
vacuum burner, see Figure 16. Check orifi ce to see
that drilled passageway is free of lint and dirt.
e. Vacuum tips of pilot burner.
f. Clean
fi rebox by vacuuming. Exercise care not to
disturb insulation inside base.
5
REMOVAL OF BURNER ASSEMBLY
a. Disconnect pilot tubing coupling, ignition cable and
ground wire from pilot assembly.
b. Disconnect gas valve at union between valve and
bulkhead penetration.
c. Remove two fasteners attaching burner to bulkhead
and single fastener for burner end support.
d. Grasp burner, tilt upward and remove from unit.
e. INSTALL BURNER by reversing procedure used
to remove.
6
REMOVAL OR REPLACEMENT OF PILOT
ASSEMBLY OR PILOT ASSEMBLY PARTS
a. If pilot assembly, sensor or pilot orifi ce need
replacement, remove jacket front panel, enclosure
cover and burner access panel using procedure
described in paragraph 4 above.
b. Disconnect pilot tubing, ground wire and ignition
sensor cable.
c. Remove two machine screws holding pilot burner to
pilot bracket.
d. Reinstall pilot burner by reversing above procedure.
e. Check pilot and main burner fl ames, refer to Figures
14 & 15.
7
CHECK MAIN BURNER AND PILOT FLAMES,
refer to Section III, paragraphs 6 and 10.
8
CHECK ALL CONTROLS ANNUALLY, see
procedure in Section III, paragraphs 7, 8, 9, 11 and 12.
MAINTENANCE OF LOW WATER CUTOFF
— During the heating season, if an external fl oat type
low water cutoff is on the boiler, the blow off valve
should be opened once a month (use greater frequency
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