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15
PUTTING THE BOILER OUT OF OPERATION
It is recommended to have the boiler operational all year round to prevent any frost damage during the winter and/or
rotating parts getting jammed during other times of the year (built in boiler safety features).
OUT OF OPERATION:
On/off function.
To be used when the appliance must be put out of operation for a long period because of a defect or another safety
risk.
Act as follows:
•
Disconnect or switch off the room thermostat and/or other external controllers from the boiler. The CH pump
and fan will stop after a short time.
•
Switch off one burner by pressing its [ON/OFF] button for six seconds.
•
Make sure that the following display screen is visible.
Display message
B o i
l e r
o f f
•
Switch off the other burner in exactly the same way.
Properties of the ‘off’ function:
•
The keys do NOT respond and the menu is NOT accessible.
•
The burners do NOT respond to an external heat demand.
•
The boiler CAN, however, be switched on again by pressing the [ON/OFF] button.
•
Pumps, fans and cascade (if applicable) are operational, and so are both recirculation protection (if applic-
able) and frost protection.
•
NOTICE: Pump 3 (CH pump) is switched OFF, but this is NOT the case when the boiler is in a cascade or if
only one burner has been switched off.
•
To reactivate the boiler, switch on the burners by pressing [ON/OFF] for six seconds again (2x).
The frost protection module can still activate the burner(s).
To prevent this, switch off this protection or put the boiler in ‘power off’ mode:
OUT OF OPERATION:
Power off.
To assure that the boiler cannot become active at all anymore, power should be cut off completely.
Act as follows:
•
Disconnect or switch off the room thermostat and/or other external controllers from the boiler. The CH pump
and fan will stop after a short time.
•
Switch off one burner by pressing its [ON/OFF] button for six seconds.
•
Make sure that the following display screen is visible.
Display message
B o i
l e r
o f f
•
Switch off the other burner in exactly the same way.
•
Switch off the electrical power supply of the boiler (remove connection from the wall socket, or switch off the
main power).
•
Close the gas valve / gas supply.
•
In case of possible frost damage: drain both the boiler and the heating system.
NOTICE: Before starting to drain the boiler, first start draining the heating system and only subsequently also drain
the boiler.
