8
User’s operating instructions
6.4
FROST PROTECTION MODE
The boiler is fitted with a frost protection system which will operate automatically when the system temperature falls
below 6°C: the burner is automatically fired and the pump is energized until the system’s water temperature has risen to
16°C.
If the temperature detected by the CH sensor falls below 2°C, burner operation is automatically stopped until the
temperature has risen to 5°C.
WARNING!
This feature will operate only if the electrical supply to the boiler is On (green Power On led
illuminated). However, further frost protection can be incorporated by using specific frost protection
products, suitable for multi-metal systems. Do not use anti-frost products for motor vehicles
because they could seriously damage the water gaskets.
If, for any reason, there is no gas or electrical supply, the above described frost protection mode will
not be active.
6.5
ELIMINATING THE FAULTS
If the boiler goes into lock-out the user can reset the boiler only in the following cases:
Lock-out led illuminated and flashing
Cause:
Insufficient water pressure in the central heating system.
Elimination of the fault:
Restore the correct pressure value by regulating the boiler’s filling valve (for correct boiler operation the pressure should
be between 0,8 and 1 bar). When the correct pressure value has been reached the led will switch off automatically and
normal boiler operation will be restored.
DANGER!
If the system has to be frequently restored please contact an authorized VIADRUS After Sales
Service Centre.
Summary of Contents for ViaKON 24 B
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