6
User Instructions
Overheat Thermostat
Your boiler is fitted with a safety
overheat thermostat which will
automatically switch off the boiler in the
case of a control malfunction causing
overheating. If your boiler goes off and
you try to light it but nothing happens,
and the 'Lock-out' neon on the control
panel is not lit, the overheat thermostat
has probably operated. The boiler will
not light until the thermostat is reset. To
reset, unscrew the small plastic cap
marked reset (see Figure 1), press the
button then replace the cap.
If this condition continually repeats,
contact your Service engineer.
Remote Programmer
Refer to the instructions supplied with
your particular system programmer.
Ventilation
Always ensure that the boiler has
adequate ventilation. Any ventilation
openings provided by the Installer must
not be obstructed.
Periodically check that they are clear.
Do not attempt to 'box in' the boiler or
build a compartment around it before
consulting your Installer.
Do not place any combustible material
around or on the boiler or flue pipe
Flue Terminal
The flue terminal, which may be on the
outside wall must not be obstructed or
damaged.
In severe conditions check that the
terminal does not become blocked by
snow.
Frost Protection
Your Installer may have fitted a frost
thermostat. If not, and you are likely to
be away for a short time, leave the
boiler on with the boiler thermostat set
at a low setting. For longer periods the
boiler and system should be drained.
Contact your Service engineer for
draining and filling the system.
Cleaning and Servicing
Lightly wipe over the case with a damp
cloth and a little detergent. Do not use
abrasive pads or cleaners.
You must have your boiler serviced at
least once a year to ensure safe and
efficient operation. Contact your Service
engineer for further details.
Failure of Electricity Supply
If the electricity supply fails, the boiler
will not operate. It should relight
automatically when the supply is
restored.
If a remote programmer is connected, it
may retain the time settings for some
time and may not have to be reset to the
correct time of day when the supply is
restored. Refer to the instructions
supplied with your programmer for
further details. It is recommended that
you check the time settings after a
power failure has occurred.
Electricity Supply
The boiler requires a 230/240 V ~ 50 Hz
supply. It must be protected by a
5 Amp fuse.
The electricity connections to the
boiler must be earthed.
Sealed Central Heating
System
If your boiler is operating on a sealed
heating system, the installer will have
adjusted the pressure in the system and
should have told you (or set it on the
pressure gauge)the system pressure
when cold.This is normally between 0.5
and 1.0 bar, which will increase slightly
when hot. If the pressure (when cold) is
below the set pressure mentioned
above, you can repressurize the system.
If this is frequently required, ask your
Installer or Service engineer to check the
heating system for leaks and to check
the expansion vessel air charge.
The boiler or system will be fitted with
an automatic air vent to remove air from
the system. Any air trapped in the
radiators should be removed by venting
the radiators using the vent screw at the
top of each radiator. Only vent a radiator
if the top is cool and the bottom is hot.
Excessive venting will reduce the
system pressure, so only vent when
necessary and check the system
pressure as mentioned above.
Re-pressurise the system if necessary.
The sealed system is fitted with a
safety valve to release excess
pressure. If water or steam is emitted
from the end of the safety valve
discharge pipe, switch off the boiler
and contact your Installer or Service
engineer.
!
WARNING
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