5
•
BURNER ON/STANDBY switch:
To switch off the burner when required,
by interrupting the signal from the heating
system controls, i.e. the remote programmer
and room thermostat.
This switch MUST be left in the ON position
during normal operation of the boiler.
WARNING
This switch does NOT isolate the
electrical supply to the burner.
WARNING
After the burner has been switched off
(either manually using the burner ON/
STANDBY switch on the control panel,
automatically by the boiler temperature
control, or the heating system controls)
the burner needs to burn-down the
remaining pellets in the brazier.
Do not open the front combustion
chamber access door until “WAIT
BOILER THERMOSTAT” is showing on
the burner control panel display.
•
OVERHEAT thermostat:
This is a built-in safety device to automatically
shut down the boiler if it overheats.
If this device should operate, it can be
manually reset once the boiler has cooled
down.
Switch the burner ON/STANDBY switch to
‘STANDBY’ and allow the boiler to cool down.
Then unscrew the plastic cap and press
the reset button. If this overheat thermostat
continually trips there may be a fault and you
should contact your Installer.
•
CLEANING AUTO/TEST switch:
When pressed and held in the TEST position,
it allows the installer or Grant service engineer
to manually operate and test the automatic
cleaning systems in both heat exchangers.
When released, it will automatically return to
the default AUTO position to allow the boiler
cleaning system to perform automatically.
Only operate the cleaning switch when the
boiler is not operating and ‘WAIT BOILER
THERMOSTAT’ is showing on the burner
control panel display.
NOTE
The Cleaning Auto/Test switch does NOT
operate the brazier cleaning system.
WARNING
After the burner has been switched off
(either manually using the burner ON/
STANDBY switch on the control panel,
automatically by the boiler temperature
control, or the heating system controls)
the burner needs to burn-down the
remaining pellets in the brazier.
Do not open the front combustion
chamber access door until ‘WAIT BOILER
THERMOSTAT’ is showing on the burner
control panel display.
If the burner door is opened during the
operation of the burner there can be
a large uncontrollable flame from the
brazier.
NOTE
Avoid repeated opening and closing of the
boiler door as this will cause the automatic
cleaning of the boiler and burner to be
delayed. This can cause excessive ash build-
up within the boiler and burner that may result
in nuisance faults occurring.
4 Boiler Controls
Figure 4-1:Boiler Control Panel
4.1 Boiler Control Panel
The boiler control panel is located at the top
of the boiler.
This control panel is fitted with three controls,
as follows:
