Gas Valve (Fig. 26); Electrodes (Fig. 27); Flue Fan & Mixer (Fig. 28-29); Burner (Fig. 28-29) - Riello VOKERA Easi-Heat Plus Ci Design, Installation & Servicing Instructions

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Fig. 25

6.12 GAS VALVE (fig. 26)

Carry out component removal procedure as described 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. Please note,
the sealing washers (Q) must be discarded and replaced with
new sealing washers. Disconnect the compensation pipe (R).
Unscrew gas pipe connections (S-T), the gas valve can now
be removed. Replace in the reverse order. Check and adjust
burner pressure settings.
WARNING, A GAS TIGHTNESS CHECK MUST BE CARRIED
OUT.
6.12.1 INJECTOR (fig. 26)
Carry out component removal procedure as described in 6.4.
Unscrew and remove gas pipe connections (S-T). Locate and
remove the injector (U) inside the valve. Replace in the reverse
order. Check and adjust burner pressure settings.
WARNING, A GAS TIGHTNESS CHECK MUST BE CARRIED
OUT.
Fig. 26

6.13 ELECTRODES (fig. 27)

Carry out component removal procedure as described in 6.4.
Remove the air chamber front cover. Disconnect the electrode
leads and ancillary wiring from their respective connectors. Re-
move the retaining screws (V) for electrode. Remove the spark
ignition electrode (W). Remove the flame sensor electrod (Y).
Fig. 27
6.14 FLUE FAN & MIXER (fig. 28-29)
Carry out component removal procedure as described in 6.4.
Remove the air chamber front cover. Locate and remove the
gas pipe locking pin (A1) and swing/rotate the gas pipe away
from the fan assembly (B1), (if necessary unscrew the gas
pipe from the gas valve G1). Locate and slacken the silencer
(H1). Locate and remove the sense electrode. To remove the
fan (E1), disconnect the electrical connections attached to the
fan, locate and remove the four screws (F1). Gently ease the
fan from its location. Replace in the reverse order.
O
S Q
U
Q
T
V
W
Y
Ensure all seals are in good condition, taking care to ensure
they are replaced correctly.

6.15 BURNER (fig. 28-29)

Carry out component removal procedure as described in 6.4.
Remove the air chamber front cover. Locate and remove the
gas pipe locking pin (A1) and swing/rotate the gas pipe away
from the fan assembly (B1), (if necessary unscrew the gas
pipe from the gas valve G1). Locate and slacken the silencer
(H1), disconnect the electrical connections attached to the
fan. Disconnect the electrode leads and ancillary wiring from
their respective connectors. Locate and remove the screws
(I1) which secure the burner assembly in position to the heat
exchanger (J1). Gently ease the fan assembly out of its location.
Once the assembly has been removed, the burner (K1) can
be withdrawn from the heat engine. Ensure the seals (L1) is in
good condition, taking care to ensure it is replaced correctly.
Replace in the reverse order.
E1
I1
J1
Fig. 28

6.16 MAIN HEAT EXCHANGER (fig. 29)

Carry out component removal procedure as described in 6.4.
Remove the air chamber front cover. Locate and remove the gas
pipe locking pin (A1) and swing/rotate the gas pipe away from
the fan assembly (B1), (if necessary unscrew the gas pipe from
the gas valve). Disconnect the electrical connections attached
to the fan. Disconnect the electrode leads and ancillary wiring
from their respective connectors.
Disconnect the flow locking pin (M1), return locking pin (N1)
on the heat exchanger. Locate and remove the 4-screws that
secure the heat exchanger to the combustion chamber (O1).
Move the heat exchanger and disconnect it from the flue collector
(P1). The heat exchanger can now be lifted up and withdrawn
from the appliance.
Replace in the reverse order. Ensure all seals are in good
condition, taking care to ensure they are replaced correctly.
H1
F1
V
Y
W
L1
K1
L1
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