5
Tab. no. 2 Thermal & technical parameters at the boiler determined for furnace oil extra light (TOEL)
combustion (heating value 42,7 MJ.kg
-3
, air temperature 15 °C and bar. air pressure
1013,25 mbar
)
Number of sections
2
3
4
5
6
Rated thermal output maximum
kW
25
37
46
60
80
Rated thermal output minimum
kW
18
25
37
46
60
Rated thermal input maximum
kW
27
40
50
65
87
Rated thermal input minimum
kW
20
27
40
50
65
Efficiency
%
see Fig. no. 4
Mass of flue gases 13% CO
2
kg.hod
-1
28-38
38-58
58-73
73-100
95-133
Flue gases temperature
°C
see Fig. no. 4
Fuel connecting overpressure
mbar
See the burner documentation
Tab. no. 3 Thermal & technical parameters at the boiler determined for natural gas combustion
(heating value 33,99 MJ.m
-3
, air temperature15 °C and bar. air pressure 1013,25 mbar)
Number of sections
2
3
4
5
6
Appliance category
II
2H
Rated thermal output maximum
kW
22
33
46
60
80
Rated thermal output minimum
kW
14
22
33
46
60
Rated thermal input maximum
kW
24
36
50
65
87
Rated thermal input minimum
kW
15
24
36
50
65
Efficiency
%
see Fig. no. 4
Mass of flue gases 9,5% CO
2
kg.hod
-1
25-36
36-55
55-83
83-111
108-148
Mass of flue gases temperature
°C
see Fig. no. 4
Fuel connecting overpressure
mbar
See the burner documentation
Tab. no. 4 Recommended types of burners
G 50 – natural gas
number of sections
[-]
2
3
4
5
6
Boiler output
[kW]
14- 22
22 - 33
33 – 46
46 - 60
60 – 80
Recommended burner
[-]
Bentone BG 100
Bentone BG 200
G 50 – furnace oil extra light
number of sections
[-]
2
3
4
5
6
Boiler output
[kW]
18 - 25
25 - 37
37 - 46
46 – 60
60 – 80
Recommended burner
[-]
Bentone B 10
Bentone B 20
4.
Description
4.1
Boiler construction
The main part of the cast iron boiler is the cast iron sectional boiler drum made of grey cast iron according to
EN 1561:
-
quality 150 (previously
Č
SN 42 2415) or
-
quality 200 (previously
Č
SN 42 2420).
The pressure parts of the boiler correspond to the strength requirements according to:
EN 297
Gas – fired central heating boilers – Type B
11
and B
11BS
fitted with atmospheric burners of
nominal heat input not exeeding 70 kW
EN 303-1
Heating boilers – Part 1: Heating boilers with forced draught burners – Terminology, general
requirements, testing and marking
EN 303-2
Heating boilers – Part 2: Heating boilers with forced draught burners – Special requirements
for boilers with atomizing oil burners
VIADRUS G 50 boiler has a cast-iron closed overpressure combustion chamber. This is a boiler with three
draughts.
The boiler output is determined by number of sections. Individual sections are interconnected by means of
forced-on insertions and tightened with the anchor bolts, thus creating a combustion space with convection
surface and the boiler water volume inside the sections. Heating water input and output are situated in the
rear part of boiler.
To the basic boiler accessories belong the sectional boiler drum assembled together with insulated burner
door, smoke extension, sheathing incl. thermal insulation and boiler control panel. Optionally other pieces of
accessories are available.
Insulated boiler door and the smoke extension are sealed by means of packing cord.
