Supplied By www.heating spares.co Tel. 0161 620 6677
CONTROL PCB
9.21
Refer to Figures 19, 24 & 52
a)
Ensure supply voltage is isolated.
b)
Lower the controls front panel and lower the control fascia panel.
c)
Unplug the electrical leads from the PCB. Refer to section 7.
d)
Unplug the BCC if fitted.
e)
Remove the PCB plastic cover.
f)
Unclip the PCB and withdraw.
g)
Carefully remove the three control knobs, noting their position and
fit onto new PCB.
h)
Fit the new PCB and plug in the BCC if previously used.
i)
Re-assemble in reverse order, ensuring control knobs are free to
move and reset button operates.
j)
Turn ON the electrical supply and set the ON/OFF switch to ON, if the
Reset LED, (Refer to section 8.3), shows steady red proceed as
follows:
a)
Press the
Reset
button. The
Reset
LED and LED 1 should flash once.
b)
Wait approximately 5 seconds, while the control is re-programmed
and then press the
Reset
button, to initialise the control.
TIME CLOCK (CBX APPLIANCES ONLY)
9.22
a)
Ensure supply voltage is isolated.
b)
Lower the controls front panel and lower the control fascia panel.
c)
Unplug the electrical leads from the PCB. Refer to section 7.
d)
Unplug the four electrical leads from the back of the clock.
e)
Remove the four retaining screws and withdraw the clock from the
control panel.
f)
Fit the new clock and re-assemble in reverse order.
DHW FLOW TURBINE, DHW FLOW
REGULATOR AND DHW FILTER
(CBX APPLIANCES ONLY)
9.23
Refer to Figure 28
a)
Ensure supply voltage is isolated.
b)
Remove the electrical lead to the DHW flow turbine.
c)
Close the DHW inlet isolating cock, open a DHW tap at the lowest
point in the system and allow the pressure to dissipate. Close this
tap again.
d)
Undo the nut connecting the DHW flow turbine to the DHW inlet
isolating cock.
e)
Undo the nut connecting the DHW flow turbine to the water feed
pipe, and remove the DHW flow turbine, (containing the DHW Flow
Regulator).
f)
The DHW filter is located inside the flow cock. To remove it, first
remove the top hat washer and then prise the filter out with a
pointed tool.
g)
The assembly can now be flushed clean using water, and parts
replaced as necessary.
h)
Re-assemble in reverse order, using a new fibre washer; ensure
that all joints and seals are correctly re-fitted.
i)
Open the DHW inlet isolating cock and vent air from the system by
opening each hot water tap in the house in turn.
52
PCB HOUSING
NG/Propane
chip card
Electrical
Connectors
Securing
Screws
DRAINING THE APPLIANCE
9.24
There may be some slight water spillage; so electrical components
should be protected.
Refer to Figures 43 & 53
a)
Before draining, give the appliance a brief CH demand, to ensure
the diverter valve is in the CH position.
b)
Ensure supply voltage is isolated.
c)
If not draining the entire CH system, close the CH flow, CH return
water isolating cocks.
d)
Close the DHW return water-isolating cock, (where fitted).
e)
Drain down the system from the external drain point, and drain the
appliance using the drain tap on the CH flow water isolating cock, in
conjunction with the manual air vent located on the LHS of the heat
exchanger; refer to Figures 43 and 53.
f)
Where the DHW circuit is to be worked on, close the DHW inlet
isolating cock, open a DHW tap at the lowest point in the system and
allow the pressure to dissipate. Close this tap again.
Note: the pressure relief valve should not be used to drain the system.
53
DRAIN POINT
DRAIN
POINT
40
751030 MANUAL (NEW) 21/9/10 08:39 Page 12
