Viadrus GRAND G 36, Manual For Operation And Installation, Page: 25 / 60

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11. Boiler operation by user
The boiler works automatically according to the regulation elements setting and the user only does
the following service activities that the worker who puts the boiler into operation is obliged to
acquaint him with:
1. Boiler switch-off or switch-on using the main switch located on the network module positioned on the
control panel of the boiler.
2. Boiler operation by means of selected regulation, to which there is always delivered a separate
operation manual. (see chap. no. 5.1.1).
3. Setting and checking the desired heating water temperature in the range 60 – 80 °C. We recommend
setting the temperature in this range only for boilers without regulation. If the boiler is controlled by a room
thermostat or other type of regulation the boiler thermostat must be set to 80 ° C temperature.
4. The hot service water setting (only in case of a stack heater connection) on the heater thermostat. To
ensure a sufficiently rapid TUV heating set the boiler thermostat to 80 °C. The time necessary for
HWS heating depends on heater volume and its heat output (this time is different for various types of
heaters).
If the interconnection between stack heater and the boiler is done according to the recommended
connection diagram the HWS is heated preferentially to the central heating. After the water heater has
been heated to the required temperature the three-way valve switches automatically to the heating
position and heating water from boiler flows into radiators and boiler keeps running until an indoor or
equitherm regulator hasn’t switched off. If the central heating isn’t needed (the indoor or equitherm
regulators are switched off), then together with boiler there is switched off the circulation pump and the
clack valve between the pump and three-way valve prevents an automatic water circulation in
heating system.
5. If the boiler gets into a failure condition the button "unblock" in the automatics on the network module
in the boiler control panel lights up .The most common reasons for failures and the possibilities to
eliminate them are shown in chapter no.15. The user can only eliminate the failures signed with symbol
„*“. In case of electricity outage the burner is put out of operation and after the voltage recovery in the
electricity network the burner is restarted automatically. The failure is unblocked by means of “unblocking”
button in the network module.
1. electric panel
2. blind flange big
3. customs panel
4. fuse box
5. boiler thermostat
6. blind flange
7. reset push-button
8. exceeded temperature
signalling
9. thermomanometer
10. blind flange
with thermomanometer
11. fuse 2,5A
12. main switch
13. unblocking of combustion
products return flow fuse
14. unblocking of safety
thermostat
Fig. no. 18 Control panel of VIADRUS GRAND G 36