3
Dear customer
We thank you that you have bought VIADRUS HERCULES U 26, a universal boiler thus having shown your
confidence in VIADRUS a.s..
For you to get used to a correct way of handling your new product from the beginning please read at first this
manual for its usage (first of all the chapter no. 7 – Boiler operation by user and chapter no. 8 – IMPORTANT
WARNING). Please follow the stated information whereby a longstanding and trouble-free boiler operation
will be guaranteed to both your and our satisfaction.
VIADRUS HERCULES U 26 is a cast-iron sectional low-pressure boiler designated for combustion of solid
fuels – coke, hard coal, wood. Combustion of other materials like plastics is impermissible.
1.
Boiler use and advantages
Three-sectional size of VIADRUS HERCULES U 26 boiler is suitable for heat sources reconstructions in
independent tenements, for smaller residential premises and leisure amenities. Bigger sizes of boilers meet
the demands on heating the houses, shops, schools etc.
The boiler is manufactured in warm-water design with both natural and forced heating water circulation and
working overpressure up to 400 kPa (4 bar). Before dispatch the boiler is tested for tightness by applying
800 kPa (8 bar) overpressure.
The boiler is designated for heating both closed and open heating systems.
Boiler advantages:
1. A high lifetime of the cast-iron heat exchanger and all other parts with regard to the quality of used
materials.
2. Long-term verified construction.
3. Sophisticated manufacturing technology on the automatic forming lines with a constant and verified
quality of the manufacturing process. (ISO 9001, ISO 14 001).
4. Coke combustion efficiency 80%
5. Simple operation and maintenance.
6. Output graduation by the number of sections.
2.
Boiler technical data
Tab. no. 1 Dimensions, technical parameters of boiler
Number of sections
pcs
3
4
5
6
7
8
9
10
Boiler category according to
EN 303 - 5
-
1
Combustion chamber volume
dm
3
23
37
51
64,5
78
91,5
105
118,5
Water space volume
l
27,6
33,3
35
44,7
50,4
56,1
61,8
67,5
Weight
kg
218
258
298
348
398
448
498
548
Combustion chamber depth
mm
185
295
405
515
625
735
845
955
Diameter of smoke socket Ø D
mm
156
176
Boiler dimensions: - height x width
mm
1158 x 600
- depth L
mm
387
498
609
720
831
942
1053
1164
- depth L1
mm
643
754
865
976
1087
1198
1309
1420
Filling hole dimensions
mm
300 x 320
Maximum water operating
overpressure
kPa
(bar)
400
(4)
Minimum water operating
overpressure
kPa
(bar)
50
(0,5)
Water test overpressure
kPa
(bar)
800
(8)
Hydraulic loss
-
see Fig. No.1
Minimum water inlet temperature
°C
60
Recommended heating water
operating temperature
°C
60 – 85
Noise level
dB
Does not exceed the level 65 dB (A)
Chimney draught
mbar
0,10
0,15
0,20
0,25
0,30
0,30
0,35
0,40
Boiler connections - heating water
2“
- reverse water
2“
Maximum fuel weight in the
chamber
kg
16,1
25,9
35,7
45,15
54,6
64,05
73,5
82,95
Temperature of cooling water for
equipment for surplus heat removal
°C
5 – 20
Overpressure of cooling water for
equipment for surplus heat removal
kPa
(bar)
200 – 600
(2 - 6)
