Failure To Light; Boiler Controls Boiler Thermostat; Limit Thermostat - Potterton Statesman 45/50L User Instructions

Failure to Light

If the boiler fails to light when required:
a) WAIT FOR THREE MINUTES to allow unburnt vapour to clear from the boiler.
b) Check that the boiler thermostat, selector switch, timer or external timer, and room thermostat (where
these are fitted) are all set to call for heat.
c) Check that there is oil in the tank, and all stop valves in the oil supply pipe are open.
d) Check that the mains electricity switch is on, and that the fuse has not blown.
e) Remove the front casing by pulling forward off the mounting clips, press the reset button which will be
illuminated on the burner cover.
If the boiler still does not light, turn off the electricity supply, and contact your installer.
Boiler Controls
Boiler Thermostat - Kitchen
• The Thermostat OFF position is designated, the knob must be turned to the minimum setting indicated by the first
and smallest 'dot', at this position the hot water from the boiler will be at approximately 55°C (130°F).
• At the maximum setting, i.e., the last and largest 'dot' on the panel, the temperature of the outlet water will be
approximately 82°C (180°F).
For milder or summer conditions it may be advisable to set the knob on or about the seventh 'dot' from minimum.
Never leave the boiler thermostat at a setting between "OFF" and the minimum setting, otherwise serious corrosion
of the boiler will occur. See Fig. 3.
Boiler Thermostat - Utility
• The Thermostat OFF position is designated, the knob must be turned clockwise to the minimum setting '1', at this
position the hot water from the boiler will be at approximately 60 °C (140 °F).
• At the maximum setting '5', the temperature of the outlet water will be approximately 82°C (180°F).
• For milder or summer conditions it may be advisable to set the knob on setting '3'.
Never leave the boiler thermostat at a setting between "OFF" and setting '1', otherwise serious corrosion of the
boiler will occur. See Fig. 2.
Note: For a gravity feed hot water system, the boiler thermostat setting should be reduced in summer to prevent
overheating of the hot water.

Limit Thermostat

• The Limit Thermostat operates if the boiler overheats for any reason. This is shown by the overheat light being lit
(not Utility models). Should this happen at any time, remove the front casing by pulling forward off the mounting
clips and press the overheat reset button (See Fig. 1). If the problem occurs again, turn off the electricity supply
and contact your installer.
4 Users Instructions
Part No. 5105705