27
220683B
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 carryout 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 t he
tube.
Switch on the electrical supply to operate the fan and
turn the gas supply on.
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 violet and red electrical connections from
the fan, see diagram 5.4.
Remove the fan complete with fan duct extension taking
care not to damage the gasket, see diagram 5.4.
Vertical Flue Only, carefully remove the restrictor plate
and additional gaskets.
Remove the flue hood, noting that there are keyhole slots
at the rear, see diagram 8.1.
Remove the combustion chamber cover, see diagram 6.3.
Remove the burner as Section 8.3.
Place a sheet of paper in the base of the combustion
chamber.
Remove the baffles, note, when replacing they are
marked “Front”, see diagram 8.2.
Clean the heat exchanger flueways with a suitable stiff
brush.
Remove the paper together with any debris.
Diagram 8.2
Diagram 8.1
Diagram 8.3
SECURING
SCREW (4)
GASKET
FLUEHOOD
SECURING NUT AND
SHAKEPROOF
WASHER
PILOT PIPE
ELECTRODE AND
LEAD ASSEMBLY
UNION
CONNECTOR
BAFFLE (4)
80FF Illustrated
4116
4109
4087
8 S e r v i c i n g
