4
221873B
To Light the Boiler
1. Check that all four isolating valves are open, the levers in line
with the valvebody, see diagram 2.
2. Open the controls cover door and familiarise yourself with the
controls, see diagram 3.
3. CAUTION. A sealed pressurised system must be filled and
pressurised by a competent person. (Optional extra filling loop
kit No. 457120).
Only operate the boiler when you are sure that the system has
been filled and pressurised. Check this by looking at the
pressure gauge “A”, it should read 0.7bar minimum.
4. Open a hot water tap, check that water flows, then close it.
5. If you are in any doubt about the boiler being filled with water
contact your installation/servicing company or the local gas
company.
6. Check that the electrical supply to the boiler is ON at the
external isolator.
7. Check lockout light, refer to boiler safety cutoff reset button.
8. Set the switch “B” to 1 situated on the control fascia.
9. Set the summer / winter button “J”, light “L” or “K” will
illuminate.
10. Set “C”, clock/timer and any remote controls as required.
11. Check the lights “D” and “E” are illuminated on the control
fascia.
Close the controls cover door.
In certain circumstances, a surge in water pressure may cause
the appliance to operate momentarily, this will be indicated by
the pump starting and the fan speed increasing. This is quite
normal.
Domestic Hot Water Temperature
The sanitary water temperature control knob “M”, see diagram
4, will control the desired temperature of the water until the flow
exceeds the capability of the boiler to give the required
temperature rise.
Then the temperature is determined by controlling the hot water
flow from the tap ie:
reduce flow - increase temperature
increase flow - reduce temperature
NOTE : The mains incoming water temperature in the winter is
lower than in the summer.
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Setting Instructions for Electro/mechanical
Clock
This clock has a twenty four hour dial, that is, 1pm is 13.
To set the time, turn the whole face clockwise until the pointer
is against the time of day.
To set any “Off” time, push the tappets outwards.
To set any “On” time, push the tappets inwards.
Time can be set either “On” or “Off” in fifteen minute segments.
Note. The clock supplied could be fitted with an override device,
see diagram 1, which switches the clock programme “On” or
“Off” permanently.
The switch will need to be repositioned to resume programmed
working.
Diagram 1
OVERRIDE
SWITCH
POINTER
TAPPETS
CLOCK FACE
CONSTANT OFF
PROGRAMMED
CONSTANT ON
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6938
Instructions for Use
