Ferroli GNK1 02, Инструкция по установке и эксплуатации

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Summer /Winter switch on the «SUMMER» setting
When the switch has been set to this position, the plant will produce hot sanitary water only and the
relative heating circuit will be kept permanently off. The burner and circulator will therefore only
operate to maintain the temperature of the sanitary water whilst this is being used or during long periods
at a standstill.
1.03 Control and securities devices operation
Regulating thermostat, manual resetting
It operates when the boiler temperature, during the heating mode reach for sanitary hot water
production such a level that can use a danger situation. Before resetting this thermostat ask for Qualified
Serviceman to inspect the appliance.
Central thermostat
It allows to control the boiler temperature by mean of its knobs. This thermostat only controls the burner
during the heating phase.
Room thermostat (not supplied)
This device is not supplied, but can be fitted by installer, it is connected in series to the control
thermostat and it manages both the burner and the circulating pump during the heating mode.
Heater regulating thermostat
Regulates the temperature of the sanitary water.
Controls the burner and heater circulator at the same time, after having by-passed the boiler regulating
thermostat and ambient thermostat if installed.
It therefore has priority over the other two thermostats.
Limit thermostat
Acts as a boiler regulating thermostat with fixed setting when hot sanitary water is produced, i.e. when
the boiler thermostat is by-passed by the heater thermostat. This thermostat can therefore meet two
often opposed requirements:
a) boiler temperature regulation during the heating phase;
b) the highest possible temperature in the boiler during the hot sanitary water production phase.