VOKERA Mynute EHE Installation & Servicing Instructions Manual - page 20
18
Fig. 28
B
A
6.20.1 EXPANSION VESSEL REMOVAL (with sufficient
clearance above)
Carry out component removal procedure as described in 6.4.
Disconnect the flue from the appliance. Disconnect the
flexible expansion pipe from the vessel. Locate and remove
the four screws (A) that secure the vessel top holding plate
(B), remove the plate (fig. 28). The expansion vessel can now
be removed. Replace in the reverse order. Ensure all seals
are in good condition, taking care to ensure they are replaced
correctly.
6.20.2 EXPANSION VESSEL REMOVAL (with insufficient
clearance above)
Carry out component removal procedure as described in
6.4. Disconnect the flexible expansion pipe from the vessel.
Disconnect the flue elbow or pipe from the appliance flue
outlet. Unclip and remove the air chamber cover, gently pull
the cover towards you before lifting and disengaging.
Remove the RH side panel of the air chamber. Disconnect
the wiring to the fan, pressure switch, primary thermistor,
overheat thermostat, condense switch & spark electrode,
taking note of their locations. Carefully unclip the wires from
the air chamber and withdraw the wiring & grommet from the
air chamber.
Disconnect the outlet gas pipe, the flow & return pipes, and
the condense pipe from the air chamber. Locate and
remove the 2-screws that secure the lower section of the air
chamber. Locate and remove the 2-screws that secure the
upper section of the air chamber. The complete air chamber
assembly can now be lifted clear from the appliance.
Locate and remove the 4-screws that secure the vessel (fig.
28). The expansion vessel can now be removed. Replace
in the reverse order. Take extreme care when refitting the
wiring to the air chamber. Ensure all seals are in good
condition, taking care to ensure they are replaced correctly.
6.21.1 LATENT HEAT COLLECTOR fig. 29/30
Carry out component removal procedure as described in
6.4. Remove the flue hood and fan assembly as detailed in
6.16. Disconnect and remove the inlet, outlet, and con-
dense pipes from the collector. Unscrew and remove the 3
screws that secure the collector to the air chamber and
disconnect the collector from the flue connection. Replace
in the reverse order ensuring all seals are intact and located
correctly.
6.21.2 DISMANTLING THE LATENT HEAT COLLECTOR
Apart from routine servicing or maintenance of the retarder
and coil, the latent heat collector is a non-serviceable
component, therefore, there is no requirement to dis-
assemble the collector.
6.22
CONDENSE TRAP REMOVAL (fig. 31)
Carry out component removal procedure as described in
6.4. Disconnect the flexible condense pipe (1) from the
condense trap. Locate and remove the condense pipe
locking pin and disconnect the condense pipe (2) from the
condense trap. Locate and disconnect the condense pres-
sure switch pipe from the condense trap (3). Carefully
remove the condense trap. Replace in the reverse order.
Fig. 30
Fig. 29
Fig. 31