45
35
Note: It is likely that ther
e will still be some water
spillage when the head is removed.
Refer to Figure 46
a)
Ensur
e supply voltage is isolated.
b)
Disconnect the electrical lead to the diver
ter valve motorised head.
c)
Unscr
ew the locating screw; refer to Figure 45.
d)
Unclip the diver
ter valve motorised head and slide it down to
disengage it from the hydroblock body.
e)
Fit the r
eplacement diverter valve motorised head.
f)
Re-assemble in r
everse order; ensure that all joints and seals are
correctly re-fitted.
Refer to Figur
e 47
a)
a) Ensur
e supply voltage is isolated.
b)
Disconnect the electrical leads to the pump head and diver
ter
valve motorised head.
c)
Drain down the appliance; r
efer to section 9.24.
d)
Remove the flow and r
eturn pipes from the heat exchanger; refer
to section 9.8.
e)
Remove the clip holding the hydr
oblock adaptor fitting in place,
and remove fitting.
f)
Remove the clip holding the r
eturn pipe in place.
g)
Undo the nut connecting the CH r
eturn pipe to the CH return
isolating cock, and disengage the CH return pipe from the hydroblock.
h)
Undo the nut connecting the DHW r
eturn pipe to the plate heat
exchanger and disengage the DHW return pipe from the hydroblock.
i)
Unscr
ew the three screws holding the hydroblock onto the
mounting studs, and remove the hydroblock.
j)
Align the r
eplacement hydroblock against the mounting studs and
secure using the three screws.
k)
Re-assemble in r
everse order; ensure that all joints and seals are
correctly re-fitted.
l)
Open the isolating cocks and vent air fr
om the system using the
manual air vent. Re-pressurise the system as necessary and check for
water leaks.
9.10
DIVERTER VALVE MOTORISED HEAD
a)
Ensur
e supply voltage is isolated.
b)
Drain down the appliance; r
efer to section 9.24.
c)
Undo the nut holding the manual air vent to the expansion vessel
and disengage the link pipe from the heat exchanger by removing the
clip and pulling upwards through the grommet at the top or by
rotating out of the way.
d)
Remove the upper expansion vessel r
etaining bracket.
e)
Slide the expansion vessel for
ward and remove.
f)
Slide the r
eplacement expansion vessel in place.
g)
Re-assemble in r
everse order; ensure that all joints and seals are
correctly re-fitted.
h)
Open the isolating cocks and vent air fr
om the system using the
manual air vent. Re-pressurise the system as necessary and check for
water leaks.
9.12
EXPANSION VESSEL
9.11
HYDROBLOCK ASSEMBLY
46
f)
Re-assemble in r
everse order; ensure that all joints and seals are
correctly re-fitted.
g)
Open the isolating cocks and vent air fr
om the system using the
manual air vent. Re-pressurise the system as necessary and check for
water leaks.
