5
USING THE PROGRAMMABLE CLOCK
1. Set the correct time by rotating the minute hand until
the arrowhead points at the correct time on the 24 hour dial.
2. Check the position of the manual override switch (just to the
bottom of the clock face). This has three positions:
-Left: is ON overriding the timer mode
-Middle is timer mode, with ON, OFF, times governed by the
time clock.
-Right position is OFF. The heating will not work at all regardless
of the main boiler control switch except if triggered by the built
in frost protection thermostat.
3. To set on/off times, move all the white tappets , in the outer
ring, between the required 'on' and 'off' times.to the outer posi-
tion. For example, if you want the heating to come on at 6am
and switch off at 10am, move all the tappets outwards between
these two times. Each tappet represents a quarter of an hour.
Set as many on/off times as required within a 24 hour period
RED LIGHT-LOCK OUT
Should the boiler fail to ignite due to lack of gas poor weather
conditions etc. It will “lockout” and the red neon will be dis-
played. To reset, turn the main control switch to off then turn on
again. If the boiler constantly locks out, call your service engi-
neer.
TURNING THE BOILER OFF
Turn the main control switch to the position.
NOTE: In this position the automatic safety devices such as frost protection and
anti pump seizure are still operative. To shut down completely and isolate the
mains supply the plug must be removed from the wall.
GENERAL GUIDANCE NOTES ON HOT WATER DELIVERY
The temperature of the hot water is governed by both the ambient temperature of the cold water supply and
its flow rate through the boiler. I.E. at a flow rate of 13.6L/min there will be a maximum rise of 25ºC above
ambient. At a flow rate of 6.8L/min there will be a rise of 50ºC above ambient, (the slower the flow rate, the
greater the temperature rise).
The flow rate of the hot water is controlled by the hot outlet tap.
The temperature selector on the boiler is effective only when there is either a low water flow rate or a high
ambient water temperature.
- The boiler can theoretically supply more than one outlet simultaneously However in practice the tap which
is nearest will receive the most hot water. If the shower is in use and a kitchen tap is opened virtually all the
hot water will be diverted to the kitchen as it offers the least resistance.
- If an outlet is too restrictive it will slow down the flow rate and increase the temperature. For example the
shower - ensure the head is free from blockages caused by scale.
- Due to the restrictive nature of simple mixer showers it is wise to turn the temperature selector down on
the boiler before using the shower.
- If a tap or shower head is too restrictive due to a fault or blockage, the flow rate will be reduced to below
the rate at which the boiler is able to modulate resulting in a wide swing in temperatures. Either fix the restric-
tion or turn the temperature selector on the boiler down.
- Caution: The boiler can produce water at over 70°C when in central heating mode. If you run a hot
tap when the boiler has been heating the radiators, the initial flow through the hot tap could be very
ON
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