Supplied By www.heating spares.co Tel. 0161 620 6677
20
Fig. 28
6.16
DOMESTIC HOT WATER HEAT EXCHANGER
(see fig. 31)
Carry out component removal procedure as de-
scribed in 6.4.
Remove motorised valve actuator as described
in 6.17. Disconnect condense outlet pipe from the
condense trap. Remove the insulation cover from
the DHW heat exchanger. Locate and remove
both inlet and outlet securing screws. Gently
ease the heat exchanger from its location.
Replace in the reverse order, ensuring the rubber
O’ ring seals are in good condition and are
correctly located.
6.17
MOTORISED VALVE ACTUATOR (see fig. 31)
Carry out component removal procedure as de-
scribed in 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 (see fig. 31)
Carry out component removal procedure as de-
scribed in 6.4.
Remove motorised valve actuator as described
in 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 may be prudent to replace the O’ ring seals and
valve cover gasket whenever the divertor valve
assembly is disturbed.
6.19
CONDENSE TRAP (see fig. 28)
Carry out component removal procedure as
described in 6.4.
Remove the PCB housing as described in 6.10.
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.
6.20
CONDENSE PRESSURE SWITCH (see fig. 29)
Carry out component removal procedure as
described in 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.
6.21
COMBUSTION COVER (see fig. 31)
Carry out component removal procedure as
described in 6.4.
Unclip and remove the air chamber cover.
Remove the gas valve as described in 6.11.
Remove the condense pressure switch as
described in 6.20. Disconnect the electrical
connection from the fan, disconnect the spark
electrode lead and earth wire from the spark
electrode. Locate and remove the twelve 10mm
securing nuts. Carefully remove the combustion
cover from the locating studs. Remove the
combustion cover from the air chamber,
withdrawing it at a slight angle from the right hand
side. Replace in the reverse order, ensuring that
all seals and insulation panels are undamaged
and in good condition.
Fig. 29
Fig. 30
Condense
pressure switch