Glow-worm Ultracom2 cxi - Manual (Page 16)

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10 Appliance safety devices
10.1 Boiler Shutdown
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 chapter "Appliance use ►
Overview".
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.
10.2 Protecting against frost
Appliance Protecion
In case of the risk of frost:
• Make sure that the electrical and gas
supply to the appliance is turned on.
• For an absence of several days, select
the "frost protection" mode. In this
mode, only the water pressure in the
heating circuit is visible.
or
• Set the "holiday" mode in the external
control.
The frost-protection system starts the
appliance's pump when the temperature in
the heating circuit goes below 12°C. The
pump stops when the temperature of the
water in the heating circuit reaches 15°C.
If the temperature in the heating circuit
goes below 7°C, the burner is lit until the
temperature reaches 35°C.
If the boiler is in "Domestic Hot Water"
mode only, the frost-protection system is
also active.
System Protection
The boiler alone cannot ensure that the
installation is protected against frost.
NOTE: Any other exposed areas of the
system should be protected by a separate
frost thermostat.
In case of prolonged absence, where
power to the dwelling and the boiler is
switched off, contact your Installation/
Servicing company or Glow-worm Service
to have the installation drained or to have
the heating circuit protected by adding an
anti-freeze specially designed for heating
systems.
b
CAUTION: Your domestic
water circuit (hot and cold) is
not protected by the boiler.
10.3 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.
10.4 Safety Discharge valve
The safety discharge valve and discharge
pipe is fitted to the boiler.
• If there is any discharge from the pipe,
switch off the boiler electrical supply,
then call your Installation/Servicing
company or Glow-worm service.