Stovax 8455 - Manual (Page 19)

19
This appliance must be serviced at least one a year by a
competent person.
1. SERVICING REQUIREMENTS
1.1 As part of the annual service, the space behind the convector
must be inspected for any debris, which may have fallen down
the chimney.
1.2 Remove the gas fire from the convector as detailed in section 4
1.3 Remove the convector box from the wall, see section 5 in
Installation.
1.3 Inspect the space behind the convector for debris and the
condition of the chimney, the flue flow test should be carried
out now. Remove any debris and carry out any necessary
remedial work.
2. FAULT FINDING
This is for use only by qualified Installers and Service Engineers.
Note: Many problems can be attributed to poor pilot flame length
caused by blocked jets as the orifice is very small. If the flame
length is much shorter than that shown in the Diagram, the pilot
may have to be changed. See Diagram 7.
It is always worth using the nozzle of a vacuum cleaner over the
end of the pilot to ensure that it has no debris within it. In
addition, many ignition problems are caused by incorrect spark
gap, ensure it is set as in Diagram 7.
7
AR0097
SERVICING INSTRUCTIONS
SERVICING REQUIREMENTS
FLAME FAILURE FUNCTIONAL CHECK
PILOT WILL NOT STAY LIT OR FIRE GOES OUT
If the appliance goes out in use continually, this may mean
that the
oxygen depletion sensor has been activated. The appliance
should not be used
until the cause has been found and rectified.
Ensure there is no debris around the pilot assembly, e.g.
coal, soot, etc.
Check for fluff in the pilot aeration hole. See Diagram 7.
Light the pilot and keep the control knob pushed in at least
10 seconds before letting go
With the pilot
running is the
gas pressure
as
stated on the
databadge?
Is the pilot
flame of the
correct
length?
See Diagram
7.
Is
thermocouple
connection
good
in back of
valve
Replace
ODS unit
Change the
ODS unit
SYSTEM O.K
Tighten the
connection
and retry
With the fire
running on
full is
the gas at the
pressure
stated
on the
databadge
Problem is
with
the pipework
or
fittings which
lead to the
fire. Correct
and retry Run for 60
sec’s.,
turn off, time
interval until
mag unit
shuts with a
click. Is this
greater
than 7
seconds?
Run for 60
sec’s.,
turn off, time
interval until
mag unit
shuts with a
click. Is this
greater
than 7
seconds?
Will the pilot
stay lit?
Will the pilot
stay lit?
Change
mag unit
YES
NO
NO
NO NO
NO
NO
NO
NO
NO
YES
YES
YES
YES
YES