29
8.
Boiler service by user
The boiler operates automatically according to the regulation elements setting and the user only
does the following service operations that he must be acquainted with by the worker who puts the
boiler into operation:
1. Boiler switching-off or switching-on by means of the network switch on the boiler control panel.
2. Boiler operation by means of the selected regulator
3. Setting the required temperature of the heating water between 0 and AUTO (0 – 85 °C) on the boiler
thermostat.
4. Heating water temperature checking.
5. Switching over between manual II (boiler controlled only by boiler thermostat) and automatic I (boiler
controlled by selected regulator) operation.
6. If there occurs a state of failure at the boiler, there will light up the fault signalling in the network
module. In case of electricity network outage the burner is put out of operation and after the voltage
recovery in the electricity network the burner will start up automatically. The failure is unblocked manually
by means of "unblocking" pushbutton in the network module.
7. Safety thermostat unblocking. In case that the boiler has been switched off by the safety thermostat,
the signal light called “temperature excess” is alight on the boiler control panel Thermostat unblocking can
only be done by the user in the network module (BT).
8. Combustion gases reflux fuse unblocking. In case that the boiler has been switched off by the
combustion gases reflux fuse, the signal light called “temperature excess” is alight in the network module.
The fuse unblocking can only be done by the user in the network module (ST).
1. electric panel
2. blind flange big
3. front panel
4. fuse case
5. boiler thermostat
6. switch nominal/reduced output I/II
7. reset pushbutton
8. temperature excess signalling
9. thermomanometer
10. blind flange with thermomanometer
11. fuse 2,5 A
12. main switch
13. combustion gases reflux fuse unblocking
14. safety thermostat unblocking
Fig. no. 18
Standard control panel of VIADRUS G 90 BOILER
