Publication No. 5105703
25
To Service the Boiler & Component Replacement
4. To Service the Boiler & Component Replacement
Remember to fill in the Benchmark Log Book. Regular
skilled servicing and cleaning of the appliance is essential
to ensure continued safe and efficient operation. The
frequency of cleaning will depend upon the particular
installation conditions, and the use to which the appliance
is put, but in general, once per year should be adequate.
It is the law that all gas appliances are installed and
serviced by competent persons as stated in Gas Safety
(installation and Use) Regulations 1998.
For Health and Safety information see page 4.
Electrical installation and servicing should be carried out by
a competent person in accordance with the I.E.E. Wiring
Regulations.
Servicing is best arranged by a contract placed with
Potterton and further details are available from Service
Enquires - see back page.
The boiler DATA PLATE and WIRING DIAGRAM are
attached to the inside of the controls cover. The boiler
CODE NUMBER which should be quoted when ordering
spares or requesting information is on the front of the control
box. See Fig. 1.
All parts likely to require servicing are readily accessible.
By removing the cover from the boiler controls and removing
the front door from the boiler, most components are exposed.
Remove the front of the combustion chamber to gain
access to the main and pilot burner and the ignition
electrode. Removal of the fan and its mounting plate
exposes the flue system, i.e. the flue elbow and fluehood.
These must be removed to gain access to the flueways in
the heat exchanger for cleaning.
The following notes apply to the boiler and its controls but
it should be remembered that attention must also be paid to
the heating circuit itself including radiator valves,
thermostats, the time control and the expansion and feed
water system. It is advisable to clean the boiler immediately
after the end of the heating season.
In all cases prior to servicing, light up the boiler and check
that the pilot and main burners have a clean, even flame and
that the gas rate and main burner pressure are correctly set.
If the pilot flame is satisfactory, no further servicing of the
pilot burner is necessary and the information given in ‘4.3.
Pilot Burner’ can be ignored.
Warning: Before the start of any servicing work, switch off
at the external electricity supply by disconnecting the
supply plug at the socket or switching off the external
isolating switch. Turn off the gas service cock.
Note: After completing any servicing or replacement of
components check for gas soundness and carry out
functional checks.
Burner
Securing
Screws
Gas Control
Valve/Support
Bracket Screw
Gas
Control
Valve Plug
PRF0032A
Fig. 29