Technical data

22
Linea
NOTE
Ensure that any replacement PCB has the cor-
rect ‘Jumper Tag’ configuration (see section 8).
6.13 GAS VALVE fig. 27
Carry out component removal procedure as de-
scribed in 6.4.
The gas valve must be changed as complete unit.
Disconnect the electrical plug and leads from the
gas valve. Slacken and unscrew gas valve inlet
and outlet connections (3). Please note, the seal-
ing washers (2) must be discarded and replaced
with new sealing washers (2). Locate and remove
gas valve retaining screws on the underside of
the boiler if required, the gas valve can now be
removed. Replace in the reverse order. Check
and adjust burner pressure settings. WARNING,
A GAS SOUNDNESS CHECK MUST BE CAR-
RIED OUT.
Fig. 27
6.14 INTEGRAL TIME SWITCH (if fitted)
Carry out component removal procedure as de-
scribed in 6.4.
Locate and remove the terminal cover and se-
curing screws (2), locate and remove the time
clock retaining screws, remove time clock. Dis-
connect wiring after carefully taking note of all
electrical connections. Replace in the reverse
order.
6.15 ELECTRODE, BURNER THERMOSTAT,
BURNER, & INJECTORS fig. 28
Carry out component removal procedure as de-
scribed in 6.4.
Unclip and remove the air chamber cover (2).
Locate and remove the screws securing the front
combustion cover (3), pull the cover towards you
before lifting and disengaging. Disconnect the
electrode lead and burner thermostat from their
respective connectors. Ease the electrode seal-
ing grommet from its seating (4). Remove the
retaining screw for the burner thermostat and re-
move the thermostat
FIG. 29, Locate and remove the four screws which
secure the burner in position (1), gently ease the
burner out of its location Once the burner has
been removed, the electrode retaining screw can
be can be removed. Locate the burner injectors
(2) and remove (if necessary). Replace in the
reverse order. Please note, the injector sealing
washers (3) must be replaced if the injectors have
been removed, ensure all seals are in good con-
dition, taking care to ensure they are replaced
correctly.
Replace in the reverse order.
Fig. 28
6.16 FLUE FAN fig. 30
Carry out component removal procedure as de-
scribed in 6.4.
Unclip and remove the air chamber cover, gently
pull the cover towards you before lifting and dis-
engaging. Locate and remove the six screws that
secure the front combustion cover (2), then re-
move the cover. Disconnect the electrical con-
nections and silicone tubes (5) attached to the
fan, noting their positions. Locate and remove the
three screws that secure the flue hood and air
baffles (3,4,7), disconnect the flue clip (6) from
the fan-flue elbow, ease the fan & flue hood as-
sembly from its location. Locate and remove the
four screws (8) that secure the fan to the flue
hood. Remove the fan to flue elbow (10). Replace
in the reverse order. Ensure all seals are in good
condition, taking care to ensure they are replaced
correctly.