Servicing & Replacement Of Parts; Preparation Of The Boiler - Potterton Envoy System 30 Installation & Service Instructions Manual

4. Servicing & Replacement of Parts - Page 17
It is the law that all gas appliances are installed and serviced
by a competent person as stated in Gas Safety (Installation
and Use) Regulations 1994.
For Health and Safety Information see Page 5.
Electrical test work and servicing should be carried out by a
competent person in accordance with the I.E.E. Wiring
Regulations.
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 a year should be adequate.
The boiler DATA PLATE and WIRING DIAGRAM are located
on the front of the boiler functional casing.
The boiler code number which is on the code badge located
on the boiler top panel see Fig.2 should always be quoted
when ordering spares or requesting information.
Before commencing the servicing of the boiler it is
advisable to carry out a pre-check on the boiler to
establish that it is functioning correctly.

Preparation of the Boiler

Preparation for servicing should be carried out in the
following manner.
1) Remove decorative outer casing doors by pulling the
bottom of the door from its fixing clips and pushing
upwards until it is clear of its top fixing.
2) Remove bottom decorative panel.
3) Remove functional case door by undoing the two lower
securing screws and lift door off the two upper hinge
brackets. Fig. 15.
Publication No. 559787
Supplied By www.heating spares.co Tel. 0161 620 6677
a) Set boiler control switch to the mid i.e. " " and the
display should read " ".
b) Set boiler control switch to " ", the display should
read " " and the boiler should light.
Note: If the boiler fails to start or does not follow the
sequence above then refer to
fault finding section on Page 25.
WARNING
Before the start of any servicing or replacement of parts
ensure that you have:
a) Switched off at the external electrical supply by
removing the plug from the wall socket or by
switching off the appliance at the external isolating
switch.
b) Isolated the gas supply at the boiler service cock.
Servicing & Replacement of Parts 17