Servicing Instructions Page No - Potterton LPG 50e Installation And Servicing Manual

SERVICING INSTRUCTIONS - Page 21
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 1994.
For Health and Safety information see back page.
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 Myson Limited and further details are available
from our Service Operations Department.
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. 2.
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
FIG. 29 BURNER AND GAS CONTROL ASSEMBLY
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 main burner pressure is correct. If the pilot
flame is satisfactory, no further servicing of the pilot burner
is necessary and the information given in
'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.
1. PREPARING THE BOILER FOR SERVICING
See FIG. 14.
NOTE: Boilers with side or rear flues have a flue elbow
fitted to the fluehood.
The elbow is replaced by an adapter on vertically flued
boilers.
A. Remove controls cover by opening the door covering
the securing screw on the underside of the controls
cover, see FIG. 14. Undo securing screw, pull controls
cover forward 10mm, lower it to release it from its four
side fixings and pull forward clear of the thermostat
knob.
B. Remove door by undoing the lower fixing screws and lift
door off the two upper hinge brackets.