VOKERA Compact 24 Installation & Servicing Instructions Manual - page 22
20
Compact
6.14
PRINTED CIRCUIT BOARD (PCB, fig. 22)
Carry out component removal procedure as de-
scribed in section 6.5.
Remove the PCB cover, after carefully taking
note off all wiring connections, disconnect all
wiring from the PCB, locate and remove the PCB
securing screws, remove PCB. Replace in the
reverse order.
6.15
INTEGRAL TIME SWITCH (fig. 22A)
Carry out component removal procedure as de-
scribed in 6.5.
Remove the PCB cover, locate and remove the
time clock retaining screws, remove time clock
after carefully taking note off all wiring connec-
tions. Replace in the reverse order.
6.16
GAS VALVE fig. 23
Carry out component removal procedure as de-
scribed in section 6.5.
The gas valve must be changed as complete unit.
Disconnect both electrical plugs from the gas
valve, disconnect silicone tube from gas valve
regulator, slacken and unscrew gas valve inlet
and outlet connections, please note, the sealing
washers must be discarded and replaced with
new sealing washers, locate and remove gas
valve retaining screws on the underside of the
boiler, the gas valve can now be removed. Replace
in the reverse order. Check and adjust burner
pressure settings. WARNING, A GAS SOUND-
NESS CHECK MUST BE CARRIED OUT.
Fig. 22
6.17
BURNER, INJECTORS AND SPARK/SENSE
ELECTRODE (fig. 24 & 25)
Carry out component removal procedure as de-
scribed in 6.5.
Remove outer combustion cover by un-clipping
the two retaining clips located at the base of the
combustion cover, gently pull the cover towards
you before lifting and disengaging it from the top
retaining lugs. Locate and remove the two screws
at the base of the inner combustion cover, pull the
cover towards you before lifting and disengaging
it from the top retaining lugs.
Disconnect both the electrode lead from its con-
nector at the top of the control fascia, and the
electrode earth lead from the spade connector on
the appliance frame. Locate and remove the four
screws which secure the burner in position, gen-
tly ease the burner out of its location whilst also
easing the electrode sealing grommet from its
location.
Once the burner has been removed, locate the
burner injectors – located to the rear of the
combustion chamber – and remove. Replace in
the reverse order. Please note, the injector sealing
washers must be replaced if the injectors have
been removed, ensure all seals are in good
condition, taking care to ensure they are replaced
correctly.
Fig. 22A
Fig. 24
M
M
CLK-1
CLK-4
Fig. 23