25
221658B
7 Instructions to the User
Diagram 8.1
Diagram 8.2
BAFFLE
(6 off)
SECURING SCREW REAR (2)
(KEYHOLE SLOTS, SLACKEN SCREW)
SECURING SCREW (2)
4083
5855
8 Servicing
Instruct and demonstrate the safe and efficient operation of the
boiler, heating system and domestic hot water system.
Advise the user, that 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.
Draw attention, if applicable, to the current issue of the current
issue of the Gas Safety (Installation and Use) Regulations,
Section 35, which imposes a duty of care on all persons who let
out any property containing a gas appliance.
It is the Law that servicing is carried out by a competent person.
Advise the user of the precautions necessary to prevent damage
to the system and building in the event of the heating system
being out of use during frost and freezing conditions.
Reminder, leave these instructions with the user.
Advise the user that the ‘Benchmark’ logbook should be
completed by the installation engineer on completion of
commissioning or servicing.
Notes: To ensure the continued efficient and safe operation of
the boiler it is recommended that it is checked and serviced as
necessary at regular intervals. The frequency of servicing will
depend upon the particular installation conditions and usage,
but in general once a year should be enough.
It is the Law that any servicing is carried out by a competent
person.
Before servicing turn off the gas and isolate the electrical supply
to the boiler.
After completing a service always test for gas soundness and
carry out functional check on controls.
Unless stated otherwise all parts are replaced in the reverse
order to removal.
8.1 Access
Refer to diagram 6.6 and slide the controls cover forwards and
off.
Remove the outer case, see diagram 6.5.
Note: As an aid to Servicing the air pressure switch tube
connection can be used to obtain a products of combustion
reading.
Remove the RED tube from the connection on the air pressure
switch and insert the analyser probe into the tube.
Switch on the electrical supply to operate the fan and turn on the
gas supply.
On completion of the test switch off the electrical supply and the
gas supply and reconnect the red tube to the air pressure
switch.
8.2 Cleaning Heat Exchanger Flueways
Disconnect the air pressure tubes see diagram 5.4.
Remove the blue and red electrical connections from the fan
see diagram 5.4.
Remove the fan complete with the fan duct extension, taking
care not to damage the gasket, see diagram 5.4 and 5.7.
Remove the flue hood, noting that there are keyhole slots at the
rear, see diagram 8.1.
Remove the combustion chamber cover.
Remove the burner as Section 8.3.
Place a sheet of paper in the base of the combustion chamber.
Remove the baffles, see diagram 8.2.
Clean the heat exchanger flueways with a suitable stiff brush.
Remove the paper together with any debris.
8.3 Main Burner
Disconnect the pilot pipe union connector.
Remove the pilot burner securing nut and shakeproof washer,
together with the pilot shield.
Remove the pilot burner assembly taking care not to damage
the electrode and lead assembly, see diagram 8.3.
Remove the wing nut from the burner support bracket, see
diagram 8.4.
FLUEHOOD
GASKET
