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 protec-
tion 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 position. For exam-
ple, 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
N.B. THE TIME CLOCK MUST BE RESET TO THE CORRECT TIME IF
THE POWER SUPPLY TO THE BOILER HAS BEEN INTERRUPTED
(POWERCUTS/SEASONAL TIME ADJUSTMENT)
RED LIGHT
-LOCK OUT
Should the boiler fail to ignite due to lack of gas, or poor weather conditions etc. It will “lockout” and the red
light will be displayed and the fault code will be shown in the display..
Note: To reset, turn the main control switch to off then turn on again. If the boiler constantly locks out, call your
service engineer.
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 10L/min there will be a maximum rise of 35ºC above ambi-
ent. 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.
ON
OFF
ON
OFF
TIMER
