Technical data

29. Pressure Gauge. See Fig. 16.
Check that the electricity supply to the appliance is turned off.
Remove the cabinet front panel as described in Section 14.2 a.
Drain the heating circuit as described in Section 15.2 a.
Unscrew the pressure gauge out of the heat bank. Fit the
replacement pressure gauge using suitable thread sealing
compound. Open the valves, fill and re-pressurise the system as
described in Section 12.2.
Reassemble the appliance in the reverse order.
30. Flow Turbine. See Figs. 6 and 53.
Check that the electricity supply to the appliance is turned off.
Remove the cabinet front panel, place the facia and control box
in the Service Position as described in Section 14.2 a and b.
Drain the hot water circuit as described in Section 15.2 b.
Separate the in-line connector.
Carefully unscrew the union connection.
Fit a replacement flow turbine in the reverse order. Ensure the
arrow on the end of the black plastic body points downwards
and new sealing washers are fitted.
Reconnect the in-line connector.
Open the valve and fill the hot water circuit.
Reassemble the appliance in the reverse order.
31. Hot Water Filter. See Figs. 16 and 53.
Check that the electricity supply to the appliance is turned off.
Remove the flow turbine as described in 15.2.30 preceding.
The water filter is located in the top of the housing. Remove the
filter clean or replace.
Reassemble in the reverse order and replace the sealing washer.
No sealing compound is required. Open the mains water valve
and fill the hot water circuit.
Reassemble the appliance in the reverse order.
32. Hot Water Flow Regulator. See Figs. 16 and 53.
Check that the electricity supply to the appliance is turned off.
Remove the flow turbine as described in 15.2.30 preceding.
The water flow regulator is located in the turbine. It may be
necessary to prise the regulator from its housing. Remove and
discard.
Fit a new flow regulator, small diameter section first. Reassemble
in the reverse order and replace the sealing washer. No sealing
compound is required.
Open the mains water valve and fill the hot water circuit.
Reassemble the appliance in the reverse order.
33. Inner Casing Cover Seal. See Fig.16.
Check that the electricity supply to the appliance is turned off.
Remove the cabinet front panel, place the facia and control box
in the Service Position and lower the expansion vessel as
described in Section 14.2 a, b and c.
Remove the inner casing cover as described in Section 14.2 d.
Remove the inner casing cover seal and discard. Fit a
replacement seal using silicon adhesive. Check that the seal
passes completely around the edge of the inner casing cover
leaving no gaps.
Reassemble the appliance in the reverse order.
34. Control Board. See Figs. 8 and 54.
Check that the electricity supply to the appliance is turned off.
Remove the cabinet front panel as described in Section 14.2 a.
Unscrew the four fixing screws - two at the top and two at the
bottom and withdraw the facia assembly.
Rest the assembly in the channel and cut-out supports provided.
Unscrew the L and N mains connection and carefully unplug all
the other connections from the board not forgetting the earth tag.
Unscrew the 6 fixing screws and lift out the board.
Re-assemble the facia assembly in the reverse order ensuring
that the control knobs are correctly aligned..
35. Facia Mounted Programmer. See Figs. 8 and 12.
Check that the electricity supply to the appliance is turned off.
Remove the cabinet front panel, place the facia and control box
in the Service Position as described in Section 14.2 a and b.
Remove the facia as described in Section 15.1.
Unplug the programmer from the control board from terminals
marked X2 “Programmer/Switch”. Undo the four nuts securing
the programmer to the facia and remove. Fit a new programmer
in the reverse order and connect the plug at the driver board.
Reassemble the facia in the reverse order.
36. Remote Mounted Programmer. See Fig. 8.
Check that the electricity has been turned off and isolate the
programmer.
Disconnect the leads from the programmer noting their
alignment. Fit the replacement programmer and reconnect the
leads checking that they are correctly positioned.
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