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By the effect of adjustment the display changes to the adjusted value. After 2 seconds the display
changes back and continuously shows the actual temperature of delivery heating water.
Raise the temperature of water only when the low value does not ensure the required temperature of
the room.
The room thermostat ensures the adjusted temperature only in its location.
3.4. Shut-down
-By turning the push-button clockwise (see Fig. 8.) the pilot flame and the burner shuts down
immediately.
-Following this the appliance can be disconnected from mains by pulling its plug out of the electrical
socket.
In 60 seconds after shutdown restart of the boiler is PROHIBITED!
When heating is suspended during winter it is advisable in order to avoid freezing of the system to set
a low temperature on the room thermostat and to operate the boiler like that (the temperature of the
room can be set to 5 ºC by turning the knob counter-clockwise until it butts on).
When DWT sensor feels temperature under 5ºC the electronics switch the boiler on heating even if
there is not request for heating (from the part of the room thermostat). This frost protective heating
operates until 25 ºC DWT. Reaching this value the boiler stops after 1 minute of post-circulation.
Notes: frost protection starts to operate only when the gas supply of boiler is ensured, the pilot
flame is burning and the mains are provided as well.
In case of a longer interruption during danger of frost the water must be discharged from the whole
system.
3.5. Instructions for maintenance
Life of the appliance can be extended by regular service and maintenance.
The cover should be wiped occasionally with a wet, then a dry cloth to keep it free from dust. The
parts of deflector should be cleaned as well. Using scrubbing materials or any other material, which
can scratch the surface is PROHIBITED!
When necessary the refill of the heating system can be made by the operator. In case of an opened-
loop until the overflow of the expansion tank and in case of a closed-loop cold heating system until
overpressure of 1 bar that can be checked on an installed pressure-meter.
To prevent scaling avoid change (drain down) of heating water.
Water must not leak at the tube connections. The possible drops must be terminated by tightening or
by change of seals. Only skilled experts may repair the gas and electric parts!
adjustment
Display of
display
Continuous
Pilot flame
Temperature controller knob
Display
Fig. 8.
Button
