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7
Boiler Safety Devices
Overheat Reset
The boiler software is designed to recognise the potential for
an overheat lockout and will shutdown before this happens. To
restart the boiler, press the reset button, see diagram 2.
If the boiler fails to resume normal operation and all external
controls are calling for heat, then call your Installation/Servicing
company or Glow-worm service.
Frost Protection
With the gas and electric supplies ON and irrespective of any
room thermostat setting, the integral frost protection device will
operate the pump when the temperature of the boiler water
falls below 8
O
C.
A timer is used so that the temperature can be checked
periodically. After 10 minutes the pump will be stopped if the
temperature is higher than 10
O
C or has already reached 35
O
C.
The burner will only activate if the boiler temperature does not
reach 10
O
C after 30 minutes or at any time if the temperature
drops to 5
O
C.
The burner will switch off when the temperature reaches 35
O
C.
NOTE:
Any other exposed areas of the system should be
protected by a separate frost thermostat.
Condensate Drain Blockage
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 or Glow-worm service if the fault persists.
