VOKERA Hydra Installation & Servicing Instructions Manual - page 23
21
6.14
ELECTRODE (fig. 24 & 25)
Carry out component removal procedure as de-
scribed in section 6.4.
Unclip and remove the air chamber cover.
Remove the electrode lead. Remove the 2 screws
that secure the electrode to the combustion cover,
and gently withdraw the electrode.
Replace in the reverse order ensuring that the
electrode seal is in good condition, and that the
combustion cover insulation board is undisturbed.
6.15
INJECTOR (fig. 26)
Carry out component removal procedure as de-
scribed in section 6.4.
Unclip and remove the air chamber cover.
Remove the fan as detailed in section 6.12 using
a 17 mm socket, locate and unscrew the injector.
Replace in the reverse order.
All dimensions in mm.
Fig. 25
Injector
Fan
Burner plate
Fig. 26
Fig. 27
Pressure
switch connection
Outlet connection
Securing nuts
Spark
electrode
Gas valve outlet
connection
Fig. 24
Inlet connection
6.16 DOMESTIC HOT WATER HEAT EXCHANGER
(fig. 29)
Carry out component removal procedure as described
in section 6.4.
Remove the PCB housing as described in section 6.10.
Locate and remove both inlet and outlet securing screws.
Gently ease from its location and rotate 180
°
clockwise
the heat exchanger.
Replace in the reverse order, ensuring the rubber O’ ring
seals are in good condition and are correctly located.
6.17 MOTORISED VALVE ACTUATOR (fig. 29)
Carry out component removal procedure as described
in section 6.4. Disconnect the electrical plug from the
actuator. Remove the locking pin from the divertor valve
cover. Withdraw the actuator. Replace in the reverse order.
6.18 DIVERTOR VALVE ASSEMBLY (fig. 29)
Carry out component removal procedure as described
in section 6.4. Remove motorised valve actuator as
described in section 6.17. Remove
the divertor valve cover by unscrewing the 4 retaining
screws. The divertor valve assembly is held in place by
an O’ ring seal, the components are spring loaded. Care
should be taken when removing the valve cover or when
levering the sealing plate from its position. Replace in
the reverse order, ensuring that the divertor valve spring
and bobbin are seated properly.
NOTE
It’s good practice to replace the O’ ring seals and valve
cover gasket whenever the divertor valve assembly is
disturbed.
6.19 CONDENSE TRAP (fig. 27)
Carry out component removal procedure as described
in section 6.4. Disconnect the pressure switch tube from
the condense trap. Disconnect both the inlet and outlet
connections from the trap. Carefully withdraw the trap,
keeping it upright to avoid spillage. Replace in the reverse
order.
6.18
CONDENSE PRESSURE SWITCH (fig. 28)
Carry out component removal procedure as
described in section 6.4.
Unclip and remove the air chamber cover.
Disconnect the electrical wiring and pressure
tube from the pressure switch. Remove the
retaining screws and/or clip.
Replace in the reverse order.