36
221051B
36
SECTION
Servicing
10
s t e p
1
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 servicing must be
carried out by a competent person.
BEFORE STARTING A SERVICE
REMOVE THE FRONT PANEL as
shown, for Access, ISOLATE THE
BOILER FROM THE
ELECTRICAL SUPPLY AND
TURN THE GAS SUPPLY OFF AT
THE GAS SERVICE COCK,
INDICATOR SLOT TO BE
VERTICAL.
Unless stated otherwise, all parts are
replaced in the reverse order to
removal.
After completing any servicing
always test for gas soundness and if
necessary carry out functional checks
of controls.
Access
Remove the electrical control box
cover by removing the four screws.
Note: As an aid to Servicing the air
pressure switch tube connection can
be used to obtain a products of
combustion reading.
Follow Steps 1, 2 and 4.
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 and gas supplies and
reconnect the red tube to the air
pressure switch.
Remove the inner case, by
unscrewing at the bottom and
unhooking at the top.
s t e p
2
s t e p
3
s t e p
4
s t e p
5
2909
INDICATOR
SLOT
(SHOWN OFF)
FRONT PANEL
ELECTRICAL
CONTROLS
BOX COVER
SECURING
SCREW(4)
GAS SERVICE
COCK
INNER
CASE
SCREW (2)
