45
12. 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 switching on and switching off by means of a network switch on the boiler control panel.
2. Boiler operation by means of selected regulation, to which there is always delivered a separate
operation manual.
3. Required heating water temperature setting and control. We set the boiler thermostat to the maximum
85ºC temperature. If the boiler is regulated only by boiler thermostat we require the temperature to be set
in 45º - 85 °C range.
4. The hot service water setting (only in case of a stack heater connection) on the heater thermostat
without regulation or with an indoor thermostat or on some of A1 - A4 regulations. In order to ensure a
sufficiently quick HWS heating we must keep the minimum 15ºC difference in setting the
temperatures on the heater and boiler thermostats (set the boiler thermostat to the maximum
position). 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.
1. electric panel
2. blind flange big
3. customs panel
4. fuse box
5. boiler thermostat
6. power switch
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. automatics unblocking
Fig. no. 28a) Standard control of panel boiler VIADRUS GARDE G 42 FOR BG 2°
5. The output control switch (only at the boilers equipped with double stage gas valve). The boiler
output in dependence on the outdoor temperature is automatically switched over from the rated to
reduced output by means of the outdoor thermostat. If the switch is in position I the boiler in case of
outdoor temperature above 0 ºC will be operated with a reduced output. If the outdoor temperature drops
below 0 ºC, the boiler will be operated with the rated output. If the switch is switched over into position II,
the boiler will be operated still with the rated it means a higher output. (See tab.no.2).
Summary of Contents for GARDE G 42 ECO
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