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A qualified boiler/burner service engineer will be required to carry out work other than the follow
-
ing: boiler cleaning, inspection of components for damage,
starting up the boiler, and the specified testing and minor
fault rectification.
Inspection & Servicing
Maintenance - Inspection & Servicing
No special equipment is required for normal boiler servicing.
Tools for cleaning the boiler heating surfaces are provided with
the boiler. If a hard scale forms from oil fired corrosive elements,
a proprietary cleaning medium (e.g. Carbonex by Arrow Chemicals
Ltd) is advantageous for softening and easier removal of such
deposits.
The service engineers' equipment will include any necessary
special tools and also a combustion efficiency test kit.
Periodic Inspection
The following periodic inspections should be made
between main servicing periods.
• Examine boiler casing panels for obvious signs
of
damage, corrosion or other deterioration, and for
security. (Badly fitting casings and damaged
insulation materials leads to wasted heat and an
increase in the boilerhouse ambient temperature).
• Examine the flue pipe and gasket for obvious
signs of damage, corrosion, flue-gas leakage,
and for security. Similarly inspect the cleaning
explosion door at rear of boiler.
• Examine the flue and chimney, as far as possible,
for partial blockage, debris, etc.
• Ensure that condensation drains at the chimney
base are clear and that the boiler flue box
drain socket is connected to a drain pipe with a
water trap.
• Keep the boilerhouse floor clear of dust and
debris which may be drawn into the burner and
cause damage.
• Examine all fuel and water valves, connection
and burner etc, for obvious signs of damage or
leakage, and for security.
In an open-vented heating system, check:
-
Level of water in the feed and expansion tank.
-
That the ball valve is free to operate correctly.
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All air vents are operating correctly.
NOTE: No continuous make-up of water
should be taking place. (In this
event check where a leak may
be occurring or if pumping over
is taking place).
• On the boiler door, examine the ceramic-strip
seal, and check that there are no flue gas leaks.
Leaks can be detected by heat marks or deterio-
ration of the metal ring holding the joint. In the
event of such signs, replace the joint immedi-
ately. Check the filler material around the
burner tube and the door lining for deterioration.
Replace when required.
• Initially examine boiler interior after one month
when using class D oil to determine necessity for
boiler cleaning. When heavy oil is being used,
examine after two weeks. The amount of use, the
number of cold starts involved, and the mean
operating temperatures all affect the rate of soot
and scale formation.
A consistent pattern will then be established to
determine the frequency of cleaning required.
With gas much longer periods between cleaning
are usually possible. If condensation occurs due
to low return water temperatures then a build up
can occur more quickly. Establish a pattern to
see if cleaning can coincide with service visits.
After a boiler is first commissioned, examinations
should initially be more frequent until a reason-
able, consistent pattern can be established.
• On oil/gas burners periodically remove photo
electric ultraviolet cell and clean the window of
the cell.
• Check that the flame shape and penetration
remain as at the initial commissioning. Report
any unusual alterations in this respect.
Report any occurrences which indicate that the
boiler, the firing equipment or the system controls
are not operating correctly.
August 2014
