6
User Instructions
Lighting your Boiler
Before lighting your boiler, ensure that:
• There is sufficient fuel in the supply
tank.
• All fuel supply valves are open.
• The water supply is on.
• The electricity supply to the boiler is
off.
• The Boiler On/Off switch is set to
OFF.
• The Heating switch is set to TIMED
or CONSTANT.
• The Hot Water switch is set to
TIMED or CONSTANT.
• The white pointer on the pressure
gauge is not below the red pointer.
• The room thermostat is at the
desired setting.
• The timer or programmer is correctly
set.
Switch on the electricity supply to the
boiler.
Set the On/Off switch to ON. Refer to
Figure 2.
The boiler will light automatically to heat
the water stored in the boiler. If the
Programmer or Timer is set to a heating
‘on’ period and the room thermostat is
‘calling’ for heat, the boiler will continue
to run to provide central heating, after
the store reaches temperature.
Once the store has reached
temperature, if a hot tap is opened the
boiler will supply hot water.
Turning off your Boiler
For short periods - Set the On/Off
switch to OFF. Refer to Figure 2.
To re-start the boiler, simply set the
switch to ON.
For long periods - Set the On/Off switch
to OFF and switch of the electricity
supply to the boiler. If required, the fuel
supply valve may be closed and the
water and electrical supplies turned off
at the mains. To re-start the boiler, refer
to the full lighting instructions above.
Points to Check if the Boiler
Fails to Light
Perform the following checks if your
boiler fails to light:
1. Ensure that a fuse has not blown or
that the electricity supply has not
failed.
2. Check that the boiler On/Off switch
is set to ON and that the POWER
indicator on the control panel is lit.
3. Check that the timer or programmer
is working and is in an ‘on’ period.
4. Check that all thermostats are set to
the desired setting and are ‘calling’
for heat.
5. Check the DEMAND indicator on
the control panel is lit.
6. Check if the burner ‘Lock-out’ reset
button (on the front face of the
burner) is lit. Refer to Figure 1.
7. If it is, press in the button to start
the burner. If the burner fails to light
and goes to ‘Lock-out’ again, check
that you have sufficient fuel in the
storage tank and the fuel supply
valves are open.
8. Check that remote fire valve has not
‘tripped’. Reset if necessary.
9. Check to see if the red OVERHEAT
indicator on the control panel is
flashing - indicating that the
overheat thermostat has operated.
See Overheat Thermostat under
General Notes and care of your
system.
10. Check the heating system water
pressure. If it falls below 0.2 bar the
boiler low pressure cut-out will be
activated, cutting power to the
burner, and the red ‘LOW
PRESSURE’ indicator on the control
panel (see Figure 2) will flash. The
system must be re-charged to
between 0.5 and 1 bar. If the
heating system loses pressure on a
regular basis then contact your
Installer to investigate the cause.
If the burner still fails to light after
carrying out these checks then a fault
exists. Switch off the electricity supply
to the boiler and contact your service
engineer.
Domestic Hot Water System
The boiler will supply domestic hot
water whenever a hot tap is opened,
provided the boiler On/Off switch is set
to ON and the Hot Water switch is set
to either CONSTANT or TIMED. If a 2-
channel programmer is fitted (either a
‘plug-in’ or remote programmer), the
Hot water setting on the programmer
must be ‘on’ for the boiler to provide
continuous hot water when the Hot
Water switch is set to TIMED.
‘Night time’ Hot Water Function
This is a feature built in to your boiler
allowing a limited amount of hot water
to be drawn off during periods when
either the hot water programmer
channel is ‘off’ (for example. during the
night) or the Hot Water switch is set to
OFF - provided that the primary store in
the boiler is hot. When a hot tap is
opened during this period, the flow
switch activates the hot water store
pump and the incoming mains cold
water is heated using whatever heat is
present in the primary store. The burner
will not fire and so the heat in the store
will gradually be used up and the hot
water temperature will reduce with time.
If a 2-channel programmer is fitted -
either a ‘plug-in’ or remote programmer,
or the remote ‘wireless’ programmable
room thermostat - the Hot water setting
on the programmer must be ‘on’ for the
boiler to provide continuous hot water
when the Hot Water switch is set to
TIMED.
User Instructions
!
NOTE
The flow of water from the taps (hot
or cold) depends on the mains
pressure, and in some homes it may
not be possible to use more than one
tap at a time.
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