This boiler must be earthed.
1.5.12 Electrical supply failure
The boiler will not work without an electrical supply. Normal operation of the boiler should
resume when the electrical supply is restored.
Reset any external controls to resume normal operation of the central heating.
If the boiler does not resume normal operation. (The burner fails to ignite after five attempts).
The overheat thermostat may have operated.
Automatic ignition can only take place after you manually reset the fault, refer to section 5.1.3.
to reset.
1.5.13 Protection against freezing
The boiler has a built in frost protection programme as long as the electricity and gas are left
switched on.
This device operates the burner and system pump when the temperature inside the boiler falls
to 3°C.
Any other exposed areas of the system should be protected by a separate frost thermostat.
If the mains electricity and gas are to be turned off for any long periods during severe weather, it
is recommended that the whole system, including the boiler, should be drained to avoid the risk
of freezing. Make sure that, if fitted, the immersion heater in the cylinder is switched off.
If you have a sealed water system contact your installation/servicing company as draining,
refilling and pressurising MUST be carried out by a competent person approved at the time by
the Health and Safety Executive.
As a safety feature the boiler will stop working if the condensate drain becomes blocked. During
freezing conditions this may be due to the forming of ice in the condense drain external to the
house. Release an ice blockage by the use of warm cloths on the pipe. The boiler should then
restart. Contact your installation/servicing company if the fault persists.
1.5.14 Boilers installed in a compartment or cupboard
If the boiler is fitted into a compartment or cupboard it does not require ventilation openings.
Do not use the compartment or cupboard for storage.
1.5.15 Boiler casing
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