VOKERA syntesi e series, Инструкция по установке и обслуживанию

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25
e
Fig. 37
Fig. 38
Fig. 36
6.24 SECONDARY THERMISTOR (see fig. 36)
Carry out component removal procedure as
described i 6.4. Pull back the protective cover
from the thermistor and disconnect the electrical
plug. Using a 13mm spanner slacken and remove
the thermistor and sealing washer from the DHW
heat exchanger manifold. Replace in the reverse
order.
6.25 AUTOMATIC BYPASS (see fig. 37)
Carry out component removal procedure as
described in 6.4.
Disconnect and remove the flow pipe at the
heating manifold & DHW manifold (1), and at the
connection to the air chamber. Using a hooked
piece of wire, carefully withdraw the bypass
cartridge (2). Ensure all seals are in good
condition, taking care to ensure they are replaced
correctly. Replace in the reverse order ensuring
the cartridge is facing the correct way.
6.26 DHW NON-RETURN VALVE (see fig. 38)
Carry out component removal procedure as
described in 6.4.
Disconnect and remove the flow pipe at the
heating and DHW manifold (1), and at the
connection to the air chamber. Using a hooked
piece of wire, carefully withdraw the non-return
cartridge (2). Ensure all seals are in good
condition, taking care to ensure they are replaced
correctly. Replace in the reverse order ensuring
the cartridge is facing the correct way.
6.27 EXPANSION VESSEL fig. 1
Should the removal and replacement of the
expansion vessel be deemed impractical, an
external expansion vessel may be fitted to the
return pipe as close to the appliance as possible.
6.27.1 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 (fig. 39). Locate and remove the four
screws that secure the vessel top holding plate,
remove the plate. 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.
6.27.2 EXPANSION VESSEL REMOVAL (with
insufficient clearance above)
Carry out component removal procedure as
described in 6.4.
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. Carefully
unclip the wires from the air chamber and
withdraw the wiring & grommet from the air
chamber. Disconnect the electrode lead and
burner thermostat wires. 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. Disconnect the flexible expansion
pipe from the vessel (fig. 39). Locate and remove
the 2-screws that secure the vessel (1). 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.