4 Boiler Controls
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:
•
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.
Figure 4-1:Boiler Control Panel
7
