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41
13 Servicing
13514
IMPORTANT NOTES:
1. To ensure the continued efficient and safe operation of the boiler it is recommended that it is checked and serviced at
regular intervals. The frequency of servicing will depend upon the particular installation and usage, but in general once a year
should be enough.
2. It is the Law that any servicing is carried out by a competent person.
3. Before commencing with a service or replacement of parts the boiler should be isolated from the electrical supply and the
gas supply should be turned of
f at the gas isolation valve.
4. When replacing a part on this appliance, use only spare parts that you can be assured conform to the safety and
performance specification that we require. Do not use reconditioned or copy parts that have not been clearly authorised by
Glow-worm.
5.
If any electrical connections have been disconnected and after their connection, checks to the earth continuity, polarity,
short circuit and resistance to earth must be r
epeated using a suitable multimeter, as described in section 14.
6. On completion the “Benchmark” Service Record should be completed.
13.1 General Inspection
Before servicing inspect the following:
1. condition of case and flue.
2. flue terminal for obstructions.
3. electrical supply connections.
4. water connections.
5. gas connection.
6. system pressure.
correct any fault before continuing.
13.2 Functional Checks
With the appliance operational carry out the following:
COMBUSTION
CHECK - with a flue gas analyser as described in
section 13.7.
If NO flue gas analyser is available, it will be necessary
to remove the front and inner casing panels, diagram
13.1 and taking care not to touch any inter
nal
components, check the flame picture through
the viewing window, diagram 13.2.
If the flame shows signs of lift, sooting or appears
yellow, it will be necessary to service the burner and
heat exchanger as described in paragraphs 13.5 and
13.6.
If the servicing does not correct the condition a flue gas
analyser will have to be used as described in paragraph
13.7.
However should the flame indicate correct combustion it
will not be necessary to service the heat exchanger and
burner.
GAS RATE
CHECK - the gas rates, see table on page 38.
If you cannot measure the gas rate it is acceptible to
measure the combustion rate as described in section
13.7. However if you do not have either facility then the
appliance MUST be turned off and disconnected until
such equipment is available.
If the gas rate requires adjustment you MUST NOT
adjust the gas valve without a gas analyser, refer to
section 13.7.
13649
FRONT CASING
PANEL
INNER CASING
PANEL
SECURING
SCREWS
(2 OFF)
SECURING
SCREWS
Diagram 13.2
Diagram 13.1
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