3
Dear customer,
we thank you that you have bought VIADRUS HERCULES U28 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. 3.1 – Boiler operation by user, chapter no. 3.4 – Boiler cleaning -
maintenance and chapter no. 3.5 – IMPORTANT NOTICE). Please follow the stated information whereby a longlife
and trouble-free boiler operation will be guaranteed for both your and our satisfaction.
1
Technical information
VIADRUS HERCULES U28 is cast-iron low-pressure boiler designed for combustion of solid fuels – light coal and
hard coal. As a complement fuel it is possible to use wood.
Combustion of other materials, like plastics is impermissible.
1.1
Usage
The VIADRUS HERCULES U28 boiler complies with the requirements on heating up family houses, shops,
schools etc.
The boiler is manufactured as a hot-water boiler 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) testing overpressure.
The boiler is designed for heating both closed and open heating systems.
1.2
Boiler advantages
1. Long lifetime of the cast-iron heat exchange 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. Combustion efficiency 82 %.
5. Easy operation and maintenance.
6. Output graduation according to the sections number.
Fig.
№
. 1
Hydraulic loss of boiler drum
Pressure loss independence on p
z
– Q flow rate
Flow rate Q (10
-3
m
3
.s
-1
)
P
re
s
s
u
re
l
o
s
s
P
z
(
P
a
)
Č
l. = sections
