6.8.4
SIX MONTHLY GAS SAFE ENGINEER ONLY
The boiler must be drained and isolated before the following maintenance procedures are
carried out (see Section 5.4 - Draining the Boiler).
14.
Drain and flush the feedwater tank. Clean any filters in the tank, in the feedwater line or in
the feedwater pump.
15.
Clean the water level probes. When replacing the probes the copper sealing washer should
be replaced. After replacement of the probes, check the operation of the low water cut-off
relay and of the feedwater pump.
16.
Test the flue using the following procedure:
Visual Inspection
Check joints between all flue sections for quality of seals. Where the flue passes through the
structure of the building use your judgement as to the integrity of this section of the flue.
Smoke Test
With
the flue capped and a smoke generator inserted into the flue, there should be no smoke
visible. If either of these tests fail, shut down the boiler and contact Fulton Ltd immediately.
17.
Check the burner combustion to ensure that excess air and carbon monoxide values are
within normal limits (see combustion values in Appendix A-TI-151-VSRT Dimensions
& Specification).
18.
Check the condition of the gas valve filter (if fitted), renew as required.
6.8.5
ANNUALLY GAS SAFE ENGINEER ONLY
19.
Inspection of the pilot assembly
Your boiler is equipped with an interrupted pilot. This pilot uses gas from the pilot gas train,
and ai
r from within the combustion chamber to run. The pilot is ignited via a spark from the
ignition electrode.
Remove the pilot line assembly – This can
be done with the burner in place See “Figure. 23
- Pilot Removal” on page 53.
•
Shut the manual ball valve in the pilot line, and ensure that the boiler is unpowered
•
Disconnect the pilot gas hose from the pilot assembly
•
Remove the ignition cable from the ignition electrode
•
Remove the bolts holding the pilot assembly down
•
Remove the pilot line assembly by lifting straight up, taking care not to lose the o-ring seal
Inspect the pilot line assembly
•
Ensure that the pilot orifice is not clogged.
•
Inspect and ensure that there are no signs of overheating, these would be visible as burner
or scaling metal, or distortion of the pilot parts
•
Inspect the gap from the ignition electrode to the sparking notch in the pilot sleeve.
•
Electrode should be centered vertically in the notch, and the minimum gap from electrode
to sparking surface should be 2.4mm.
•
Ensure that the ceramic on the ignition electrode is not cracked or damaged
If any parts of the pilot assembly or the dead-zone of
the burner are overheated, this could
indicate a failure in the seal at the burner plate, or the premix transition, which allows
combustion to flow upward. Inspect all seals if this is the case.
Note: Removing the burner plate will require replacem
ent gaskets.
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