Viadrus G 50 Series Instruction Manual

2
Table of contents: page
1. Produced boiler variants..........................................................................................................................3
1.1 Purchase order.....................................................................................................................................3
2. Boiler usage and its advantages..............................................................................................................3
3. Boiler technical data.................................................................................................................................4
4. Description...............................................................................................................................................5
4.1 Boiler construction................................................................................................................................5
4.2 Control, regulation and safety elements...............................................................................................7
4.3 Electric wiring diagram for boiler..........................................................................................................8
5. Positioning and installation.......................................................................................................................9
5.1 Rules and regulations...........................................................................................................................9
5.2 Positioning possibilities.......................................................................................................................11
6. Delivery and assembly...........................................................................................................................12
6.1 Delivery and accessories ...................................................................................................................12
6.2 Parts of boiler shell.............................................................................................................................12
6.3 Assembly procedure...........................................................................................................................13
7. Commissioning ......................................................................................................................................14
7.1 Verification before commissioning .....................................................................................................14
7.2 Boilers commissioning .......................................................................................................................14
8. Boiler operation by user.........................................................................................................................14
9. IMPORTANT WARNINGS.....................................................................................................................15
10. Maintenance ..........................................................................................................................................16
11. Instructions for product disposal after its service life.............................................................................16
12. Defects and their elimination..................................................................................................................16
13. Guarantee and liability for defects .........................................................................................................17

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Dear customer,
we thank you that you have bought the VIADRUS G 50 boiler thus having shown your confidence in
VIADRUS a.s.
The boiler design you have received is determined for furnace extra light oil (TOEL) combustion and
for natural gas combustion in central pressurized burners and its trade name is VIADRUS G 50.
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. 8 – Boiler operation by user and the chapter
no. 9 – Important warnings). Please follow the under mentioned information and especially the
prescribed annual check-ups to be carried out an authorized firm in order to guarantee a long-time
and trouble-free boiler operation to both your and our satisfaction.
1. Produced boiler variants
1.1 Purchase order
In the purchase order there must be specified:
Purchase order specification code
G 50 X
2. Boiler usage and its advantages
Fig. no. 1 VIADRUS G 50 boiler assembly
Boiler size:
2: 2 sectional design
3: 3 sectional design
4: 4 sectional design
5: 5 sectional design
6: 6 sectional design
electric panel
network module
boiler drum
sight glass
shell of boiler
burner door
burner plate
insulation
boiler drum
insulation

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VIADRUS G 50 is a cast iron boiler determined for combustion liquid and gaseous fuels. Two- and three-
sectional size suits the reconstruction of heat sources in smaller houses and recreational facilities. Bigger
sizes suit the requirements for heating of cottages, shops, schools etc.
Boilers are only manufactured as the hot-water type with forced heating water circulation and working
overpressure up to do 400 kPa (4 bar). Before the dispatch the boilers are tested for tightness by testing
overpressure 800 kPa (8 bar); they satisfy the insulation and transient resistance tests.
Boiler advantages:
1. A high service life of cast-iron exchanger and all other parts with regard to the quality of used materials.
2. Efficiency above 90 %.
3. Reliability of regulation and security elements.
4. Simple operation and maintenance.
5. Low demand on chimney draught.
6. Output graduation by number of sections.
3. VIADRUS G 50 boiler technical data
Tab. no. 1 Dimensions, boiler technical parameters
fuel value: natural gas33,99 MJ.m
-3
furnace oil extra light(TOEL) 42,7 MJ/kg
Number of sections pc 2 3 4 5 6
Boiler mass without burner kg 165 216 270 319 367
Water space volume l 27 40 53 66 79
Diameter of smoke socket mm 130 130 150 150 150
Boiler dimensions: height x width mm 785 x 600
length (without burners) mm 488 638 788 938 1088
Heat-delivery surface m
2
1,05 1,69 2,33 2,97 3,61
Combustion chamber volume m
3
0,009 0,021 0,032 0,044 0,056
Combustion gas volume m
3
0,0186 0,02586 0,0331 0,0403 0,0475
Combustion chamber depth mm 205 355 505 655 805
Opening for burner mm 115
Pressure loss on water side mbar 0,15-0,5 0,15-1,35 0,15-1,40 0,15-1,50 0,15-2
Testing water overpressure kPa (bar) 800 (8)
Working water overpressure kPa (bar) 400 (4)
Recommended heating water operating
temperature °C 50 – 80
Safety thermostat setting °C 100
Pump thermostat setting °C 45
Stand-by waste kW 0,2 0,3 0,3 0,4 0,5
Pressure loss on flue gases side - see Fig. no. 4
Noise level dB See the burner documentation
Chimney draught mbar Min. 0,05 Min. 0,10
Tensile loss mbar 0,27 0,28 0,29 0,3 0,36
Overpressure in the combustion chamber mbar 0,11 0,14 0,18 0,21 0,26
Boiler connections – heating and return water Js 1“ 1 1/4“
Connection voltage 1/N/PE 230 V AC 50 Hz TN - S
Electric input kW Max. 0,1 + burner input
Electric coverage IP 40
The values that depend on the type of used central burner are stated in burner documentation.

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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 ČSN 42 2415) or
-quality 200 (previously ČSN 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.

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By use of inbuilt elements (lower turbulators, guide plate and upper turbulators) in the smoke channels (see
Fig. no. 2) the heat transfer and boiler efficiency are improved.
Tab. no. 5 Dislocation guide plates and turbulators
Type of boiler G 50 2xxx G 50 3xxx G 50 4xxx G 50 5xxx G 50 6xxx
Lower turbulator small 2 2 -
Lower turbulator big - 2 2 4 -
guide plates 2 (2) (2) - -
Upper turbulators 2 - - - -
upper turbulator guide plate lower turbulator big lower turbulator small
Fig. no. 2 Turbulators
Fig. no. 3 Boiler drum

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When inserting supplementary inbuilt elements (value in brackets) the values in output diagram change as
follows:
G 50 3XX oil: temperature of flue gases drops by 6 - 12 °C. Overpressure in combustion chamber
grows by 3 - 5 Pa
G 50 4XX oil: temperature of flue gases drops by 7 - 15 °C. Overpressure in combustion chamber
grows by 10 - 15 Pa.
Toel
ZP Fig. no. 4 Output diagram for boiler G 50
The whole boiler drum is insulated with health harmless insulation which reduces losses related to heat
transfer into environment.
The boiler steel shell surface is painted by using a good quality comaxite paint.
Fig. no. 5 Flue gases turbulence in boiler drum
4.2 Control, regulation and safety elements
As a standard boiler is delivered without the master regulation, with network module and thermostats.
In the basic connection it enables:
Connection of circulating pump (switched by pump thermostat)
Connection of indoor thermostat
Connection of boiler by means of a three- way valve
Guide
plates
Upper
turbulator
Lower
turbulator
Efficiency of boiler
Flue gases temperature
Pressure loss on flue gases side

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4.3 Electric wiring diagram for VIADRUS G 50 boiler
Fig. no. 6 Electric wiring diagram
Legend: X1 Terminal Block 1N Zero bridge PE Protective bridge Fu1 Fuse 6,3 A S1 Main switch Z1 Suppression component FS 241 – 6,3 A H1 Signalization “on” H2 BT1 signalling H3 Burner defect signalling H4 Circulation pump run
BT1 Safety thermostat BT2 Service thermostat BT3 Circulation pump thermostat MPH1 Service hours for 1° burner stage MPH2 Service hours for 2° burner stage KA1 Relay 2°of burner KA2 Relay of circulation pump Q1 Boiler bypass pump Q2 Boiler circulation pump
H
Boiler burner
BOILER REGULATION
master control
RJ
protected input
1 NPE 50 Hz 230 V/10 A
BOX
COVER
REAR BOX
PART
LOWER
BOX
PART
LOWER
PART
PROTECTIVE
BRIDGE
(PE)
PROTECTIVE
BRIDGE
(PE)
P
ROTECTIVE
BRIDGE
(PE)
PROTECTIVE
BRIDGE (PE)

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Fig. no. 7 Connection of burner connector – power supply+ 1°
5. Positioning and installation
5.1 Rules and regulations
Boiler can only be installed by a firm holding a valid license for gas appliances installation and
maintenance. A project according to the valid regulations must be prepared for installation.
The heating system must be filled with water, that meets the ČSN 07 7401 requirements, especially its
harness must not exceed the required parameters.
Recommended values
Hardness mmol/l 1
Ca
2+
mmol/l 0,3
Concentration of total Fe + Mn mg/l (0,3)*
*) recommended value
WARNING!!! The use of anti-freeze mixture is not recommended by the manufacturer.
a) to the heating system
ČSN 06 0310 Heating systems in buildings – Designing and installation
ČSN 06 0830 Heating systems in buildings – protecting device
ČSN 07 7401 Water and steam for thermal energy equipments with working pressure up to
8 MPa
EN 267 Forced draught oil burners – Definitions, requirements, testing, marking
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
EN 676 Automatic forced draught burners for gaseous fuels
b) to the gas distribution
EN 1775 Gas supply - Gas pipework for buildings - Maximum operating pressure less
than or equal to 5 bar - Functional recommendations.
EN 12007-1 Gas supply systems – Pipelines for maximum operating pressure up to and
including 16 bar – Part 1: General functional recommendations
EN 12007-2 Gas supply systems – Pipelines for maximum operating pressure up to and
including 16 bar – Part 2: Specific functional recommendations for polyethylene
(MOP up to and including 10 bar)
EN 12007-3 Gas supply systems – Pipelines for maximum operating pressure up to and
including 16 bar – Part 3: Specific functional recommendations for steel
EN 12007-4 Gas supply systems – Pipelines for maximum operating pressure up to and
including 16 bar – Part 4: Specific functional recommendations for renovation
ČSN 38 6405 Gas equipments. Operating principles
Act no. 222/94 Coll. on the conditions of enterprise and public service performance in power industry
sector and on the state energy inspection
B4 UNCONNECTED
S3 RED
T2 BROWN
T1 BLACK
N BLUE
≡YELLOW/GREEN
L BROWN

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c) to liquid fuel distribution
ČSN 65 0201 Combustible liquids. Premises for production, storage and handling
Prom. MV ČR č. 35/77 on fire safety at storing and using the heating oil
PO 1410/65 of 01. 03. 1966 temporary regulations for heating with heating oil and fuel oil
d) to the electrical network
ČSN 33 0165 Electrical regulations. Marking the conductors with colours or digits.
Implementing regulations.
ČSN 33 1500 Electrical regulations. Electrical equipments revision
ČSN 33 2000-1 ed. 2 Low-voltage electrical installations – Part 1: Fundamental principles, assessment
of general characteristics, definitions.
ČSN 33 2000-4-41 ed. 2 Low voltage electrical installations - Part 4- 41: Protection for safety - Protection
against electric shock
ČSN 33 2000-5-51 ed. 3 Electrical installations of buildings – Part 5-51: Selection and erection of
electrical equipment – Common rules
ČSN 33 2130 ed. 2 Low-voltage electrical installations – Internal electric distribution lines
ČSN 33 2180 Electrical regulations. Connection of electrical devices and appliances.
ČSN 34 0350 ed. 2 Safety requirements for flexibile cords and cables
EN 60079-10 Electrical apparatus for explosive gas atmospheres – Part 10: Classification of
hazardous areas.
EN 60079-14 ed.2 Electrical apparatus for explosive gas atmospheres – Part 14: Electrical
installations in hazardous areas (other than mines)
EN 60 335-1 ed.2 Household and similar electrical appliances – Safety – Part 1: General
requirements.
EN 60 335-2-102 Household and similar electrical appliances – Safety – Part 2-102: Particular
requirements for gas, oil and solid-fuel burning appliances having electrical
connections.
EN 60445 ed. 4 Basic and safety principles for man-machine interface, marking and
identification – Identification of equipment terminals, conductor terminations and
conductors
e) to the chimney
ČSN 73 4201 Chimneys and flue gas ducting– designing, implementation and connection of
fuel consumers.
f) regarding the fire regulations
ČSN 06 1008 Fire safety of heat installations.
EN 13501-1 Fire classification of construction products and building elements – Part 1:
Classification using test data from reaction to fire tests.
g) oil storage
ČSN 65 0201 Combustible liquids. Premises for production, storage and handling
ČSN 65 7991 Oil industry products. Fuel oils. Technical requirements.
ČSN 73 0081 Corrosion protection in building industry.
ČSN 75 3415 Water protection against oil products. Facilities for handling the oil products and
their storage.
Promulgation MLVH no. 6/1977 Coll. on protection of quality of surface and underground waters.
h) to the system of HWS heating
ČSN 06 0320 Heating systems in buildings – Hot water preparation – Designing and planning
ČSN 06 0830 Heating systems in buildings – Safety devices.
ČSN 75 5409 Water installations inside buildings
Regulation issued by MLVH no. 6/1977 Coll. on surface and underground waters protection.
Based on the regulation issued by Czech Office for Labour Protection– Code no. 91/1993 it is
necessary to distinguish in design, erection, positioning and operation of low-pressure steam-boiler
rooms:
- boilers with rated heat output up to do 50 kW
- boilers with rated heat output up 50 kW and above – boiler room category III – it regards boiler
VIADRUS G 50 in 5 and 6 Art.
ČSN 07 0703 Boiler room with gas fuel –operated equipments
ČSN 38 6420 Industrial gas pipelines

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5.2 Positioning possibilities
Boiler can be installed in basic environment AA5/AB5 according to ČSN 33 2000-1 ed. 2. It must not
be installed in zones 0,1,2 according to ČSN 33 2000-7-701 ed. 2.
The boiler is equipped with a movable mains supply and a plug. The boiler must be according to
EN 60 335 – 1 ed. 2 Art. 7.12.4 positioned in a way making sure that the plug is accessible.
The installation of the boiler must comply with all requirements of ČSN 06 1008.
Boilers positioning with regard to the fire regulations:
1. Positioning on the floor made of incombustible material
−Install boiler on fireproof thermally bottom exceeding the boiler platform by 20 mm on the sides and only
up to the boiler drum depth.
−If the boiler is positioned in a cellar we recommend to install it on a retaining wall (bedding) minimum
50 mm high
2. A safe distance from combustible materials
−when installing and operating the boiler it is necessary to keep a safety distance of 200 mm from the
materials of combustibility grade A1, A2, B and C (D);
−for easily combustible materials of combustibility grade E (F), which quickly burn and burn themselves
even after removal of ignition source (such as paper, cardboard, asphalt and tar paper, wood and wood-
fiber boards, plastics, floor coverings) the safe distance has to be doubled, i.e. to 400 mm;
−safe distance should be doubled as bulb where the grade of reaction to fire has not been proved.
Tab. no. 6 Grade of reaction to fire
Grade of reaction to fire Examples of building materials and products included in the reaction to fire
(Extract from EN 13 501-1 + A1)
A1 – incombustible Granite, sandstone, concrete, bricks, ceramic tiles, mortars, fireproof plasters, …
A2 – combustible with difficulty
acumin, izumin, heraklit, lignos, boards and basalt felt, fibreglass boards,...
B– hardly combustible Beech and oak wood, hobrex boards, plywood, werzalit, umakart, sirkolit,...
C (D) – medium combustible Pinewood, larch, whitewood, chipboard and cork boards, rubber flooring,...
E (F) – easily combustible Asphaltboard, fibreboards, cellulose materials, polyurethane, polystyrene,
polyethylene, PVC,…
Number of sections 2 3 4 5 6
TOEL – output in kW 18-25 25-37 37-46 46-60 60-80
Natural gas– output in kW 14-22 22-33 33-46 46-60 60-80
L 488 638 788 938 1088
H (max.) 260 260 320 320 320
Fig. no. 8 Positioning of G 50 boilers in boiler room

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Boilers positioning with regard to the necessary handling space:
according to Fig. No. 8
Air supply demands:
Boiler must only be installed in a room with air supply according to EN 1775 - Gas supply - Gas
pipework for buildings - Maximum operating pressure less than or equal to 5 bar - Functional
recommendations.
6. Delivery and assembly
6.1 Delivery and accessories
The boiler is delivered in a decomposed condition. The boiler drum is completed and fastened to a pallet. The
boiler shells, electric panel and burner are in separate cardboard boxes.
The boiler drum can be handled by use of a hand pallet truck (the boiler drum is put on a pallet) or after the
shells assembly there are installed the lifting lugs in the upper part of the boiler drum for its suspension.
6.2 Parts of boiler shell
1. Part of the front shell 1 pc
2. Lower part of the front part of the shell 1 pc
3. Side part of the shell 2 pc
4. Upper part of the shell 1 pc
5. Rear upper part of the shell 1 pc
6. Rear lower part of the shell 1 pc
7. Shell console 4 pc
8. Tapping screw 4,2x9 13 pc
9. Screw M 5 x 10 8 pc
10. Insulation of the boiler body 1 pc
11. Insulation of the rear upper part of shell 1 pc
12. Insulation of the rear lower part of shell 1 pc
13. Shell handrail 2 pc
14. VIADRUS label 1 pc
Fig. no. 9 Boiler shell compostion

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6.3 Assembly procedure
1. Put the consoles (pos. 7) between the anchor bolts nuts with washers and risers at the top of the front
and rear boiler section.
2. Chamfered side of the console is directed to the boiler section.
3. Put the boiler body insulation on the boiler body (pos. 10).
4. Put the side parts of the shell on the consoles (pos. 3) – with the narrower cutout in the front part of the
boiler.
5. In the rear part of the boiler screw the rear upper part of the shell with insulation (pos.11) and rear lower
part of the shell with insulation (pos.12) to the side parts of the shell by means of tapping screws.
6. To 2 pc M5 threaded rods welded in the upper part of the shell (pos. 4) put the strip KZL (pos.16)
according to the selected wiring outlet direction and secure with 2 pc M5 nuts.
7. To the top section of the side parts fit 2 M5 screws in the front part and 2 M5 screws in the rear part it
means 4 pc M5 screws altogether so as to retain the gap of the sheet thickness between the shell and
the screw head
8. Before mounting the control box put out the perforated section in the upper part of the shell.
9. Pull the conductors, capillaries of thermostats and thermomanometer through the opening.
10. Put the capillaries of thermostats and thermometer sensor into the basin installed in the top hub of the
front boiler section and secure with the spring of capillaries. Screw the check valve of the manometer
into the bottom hub of the front section.
11. Screw the control box by means of 2 pc screws M6 with washers and nuts to the upper part of the shell
and then put it on the screw heads located in the upper section of shell side parts of the shell and fix by
sliding backwards.
12. Screw the upper rear part of the shell by means of 3 tapping screws to the upper part of the shell.
13. After the burner installation is complete put the front part of the shell with the label VIADRUS on the
screw heads located in the front part of the shell side parts (pos. 3). Before mounting click into 2 pc
handles (pos. 13).
14. Cover the lower section of the front part of the shell with its bottom part (pos. 2) using 2 pc tapping
screws.
Number of sections 2 3 4 5 6
furnace oil extra light(TOEL) – output inW 18-25 25-37 37-46 46-60 60-80
natural gas– output inW 14-22 22-33 33-46 46-60 60-80
L 488 638 788 938 1088
D 130 130 150 150 150
H (max.) 260 260 320 320 320
Fig. no. 10 Dimensions boilers VIADRUS G 50
15. Filling the heating system with water.
The heating system must be thoroughly flushed in order to wash out all impurities. Water for boilers and
heating system filling must be clear and colourless, with no suspended materials, oil and aggressive
chemicals. Its hardness must correspond to ČSN 07 7401 and it is necessary to treat water in case its
hardness is unsuitable. The heating systems with an open expansion reservoir allow a direct contact
between heating water and atmosphere. During the heating season the expanding water in reservoir
absorbs oxygen which increases the corrosive affects and at the same lot of water gets evaporated. It
can only be replenished by water treated according to ČSN 07 7401. During the heating season the
water volume in heating system must be kept constant. When refilling the heating system with water it is
necessary to prevent it from air intake. Water from boilers and heating system must never be discharged

14
or taken for usage except for cases of emergency cases like repairs etc. Water discharge and filling with
new water increases the danger of corrosion and scale development. In case we have to refill the
heating system with water we only do this operation when boiler is cold in order to prevent the
sections from getting damaged.
16. After having filled a boiler and heating system it is necessary to check all joints for their tightness.
The assembly completion and stoking tests accomplishment must be recorded in “Guarantee
certificate”.
7. Commissioning
Boilers commissioning, thermal output setting and any interference in electric part of boilers or
connection of other control elements can only be done by a contracting service organization
authorized to do the service works.
7.1 Verification before commissioning
Before boilers commissioning it is necessary to check:
a) heating system filling with water (thermo-manometer and system tightness check-up)
b) Boiler thermostat setting to 50 - 80
o
C
c) Fuel input pressure before the boiler (18 – 23 mbar for natural gas, furnace oil extra light (TOEL)
according to burner documentation)
d) Connection to electric network 230 V/50 Hz via a cable with a plug to a standardized socket secured by
10 A. ČSN 33 2180 Art.. 6.2.2. – the sockets is carried out in a way making sure that the protective plug
is up and the inner or zero conductor is connected to right hand cup in the front view. The same applies
to double sockets.
e) Connection to the chimney – tightness and mechanical stability
7.2 Boilers commissioning
1. Burner assembly and its adjustment plus commissioning together with a burner must be done by a burner
supplier's service firm. The service firm will provide the user with a training in operating the burner, with
manual for burner operation and will ensure its guarantee and after guarantee repairs.
2. Gas or furnace oil extra light (TOEL) connection to the burner and electric network
3. Boiler commissioning– setting of required return water 50 – 80 °C temperature.
4. Operate boiler in this operating condition according to manual for usage
5. Make the user acquainted with boilers operation
6. Put down a record in Guarantee certificate.
8. Boiler operation by user
Boilers work automatically according to their regulation elements setting and users only have to do
regularly following operations that the worker who puts the boiler into operation is obliged to be
make them acquainted with:
1. Boiler switch off or switch on via the power supply switch on the boiler control panel.
2. Boiler operation control via the selectd regulation, according to operation manual.
3. Required heating water temperature setting and control in the range from 50 to 80°C. We
recommend to set this temperature in this range only at boilers without regulation. If a boiler is controlled
by an indoor thermostat or by some other type of regulation the boiler thermostat must in the maximum
temperature position.
4. In case there appears a boiler failure state the exceeded temperature signalling or burner defect
signalling will appear on boiler control panel.
5. In case of an electricity outage the burner is switched off and after the voltage has been restored in the
network the burner is restarted automatically.
6. Unblocking of safety thermostat. If the boiler has been switched of via the safety thermostat on the
control panel there is lit a lamp signalling the exceeded temperature. The thermostat can be unblocked by
user using the safety thermostat "reset” switch positioned in the network module on the control panel.
7. The pressure control in heating system – the pressure must not exceed 400 kPa (4 bar) and be lower
than minimum value set by the commissioning technician.

15
1. Plate of the electric panel
2. Main switch
3. Exceeded temperature signalling and burner defect
signalling
4. Pump’s signalling
5. Pump’s thermostat
6. Safety thermostat
7. Boiler thermostat
8. Fuse 2,5 A
9. Running hours counter
10. Thermomanometr
11. Blind flange
12. Bushing ICOTEK
Fig. no. 11 VIADRUS G 50 control panel
9. IMPORTANT WARNINGS
1) The boiler only can be used for the purpose that it is destined for.
2) The boiler can only be operated by adult persons and is forbidden to leave children without
being attended by adults.
3) The boiler is not destined for the use by persons (incl. children) whose physical, sensual or
mental disability or lack of experience and knowledge prevent them from a safe use of the
appliance unless they are supervised or if they were not instructed on the use of appliance by a
person responsible for their safety.
4) Children should be supervised in order to ensure that they do not play with the appliance.
5) In case of a long-term still-stand of boilers they must be disconnected from electricity- from the
socket.
6) Boiler rooms must be kept clean and dustless. From the boiler room area there must be removed
all sources of pollution and during the works (insulating works, boiler room cleaning) which
cause the dustiness the boiler must be put out of operation. Even the partial impurities deposits
on the burner will degrade the combustion process and threaten the economic and reliable
boilers operation. We don’t recommend to keep domestic animals (dogs, cats etc.)in boiler
rooms
7) In case that there appears the danger of flammable vapours or gases penetration into the boiler
room or during the works at which there is a temporary fire or explosion danger (gluing the
flooring, paints using the flammable materials) the boiler must be long enough before the works
put out of operation.
8) Don’t put ay objects made of flammable material on boiler and within a distance smaller than the
safe distance from it.
9) The user is obliged to charge with boiler commissioning, its regular maintenance and defect
elimination only a professional contractual service accredited by VIADRUS a.s., the boilers
manufacturer, otherwise there does not apply the guarantee for boilers proper function.
“VIADRUS G 50 quality and completeness certificate“ filled in by the service contractual
organization serves as the “Guarantee certificate“.
10) Once a year it is necessary to do a regular boiler maintenance according to following table.
11) During assembly, installation and operation of the appliance it is necessary to comply with
standards that apply in the relevant country of destination.
If these conditions are not observed the guarantee repairs cannot be required.

16
10. Maintenance
All interventions can only be done by contractual service organization trained by the manufacturer.
1. Disconnect the boiler from electricity supply.
2. Close the fuel supply to burner.
3. Dismount the burner door nuts and open the door.
4. Check the convection surfaces:
- dismount the front part of boiler shell
- dismount the fastening nuts and open the burner door
- visual check of convection surfaces
5. In case of convection surfaces clogging apply the procedure as follows:
- fill all convection surfaces vents with diluted soap solution
- let the solution effect for approx. 10minutes
- use a lower water pressure for spraying the convection surfaces
- repeatedly by applying a higher water pressure complete the convection surfaces cleaning
- remove thoroughly the impurities from the space of burner
Warning: Water must never get into contact with burner door insulation!
6. Check the burner nozzle clogging. In case of impurities clean it according to burner manufacturer ´s
instructions.
7. Shut again the burner door and secure with nuts and washers.
8. Connect the fuel supply to the burner
9. Open the fuel supply,
10. Check the fuel supply tightness to the burner.
11. Connect the boilers to the electricity supply and switch them on
12. Set and regulate the boilers thermal output.
11. Instructions for product disposal after its service life
VIADRUS a.s. is contractual partner of firm EKO – KOM a.s. with client number F00120649.
The packages comply with EN 13427.
Because the product is manufactured of common materials we recommend to dispose them in the ways as
follows:
−the exchanger (grey cast-iron) through a firm dealing with waste collection and disposal
−piping, shell - through a firm dealing with waste collection and disposal
−other metal parts - through a firm dealing with waste collection and disposal
−gas fitting, breather - through a firm dealing with waste collection and disposal as the non-ferrous metal
−ROTAFLEX insulation material - into the common waste
The boiler package should be disposed of in following way:
−plastic foil, cardboard package and wooden pallet into the common waste
−metal strap (for strapping) - through a firm dealing with waste collection and disposal
In case that the product has lost its serviceability you can take advantage of product “take back
service” (if this is established); in case that the originator has declared that it is a scrap it must be
handled according to the valid legislation of relevant country.
12. Defects and their elimination
The defects can only be eliminated by a trained contractual service organization which notes it down in the
guarantee attachment.
If the safety thermostat keeps blocking repeatedly the contractual service worker must be called.

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DEFECT REASON ELIMINATION
1. the pilot light on the main
switch is not on after the
boiler has been switched on
No el. voltage on the boilers input Check the voltage in the socket
Defect pilot lamp Exchange the switch
2. boiler sets on fire but goes
out immediately A wrong connection between the inner and phase conductor in
supply socket
Check and change of connection:
Terminal U- phase conductor
Terminal N – zero conductor
Impurities filter on the gas valve
input clogged Clean the gas valve filter
3. boiler cannot be lit – the
safety thermostat switched
off (on the control panel in
network module there the
exceeded temperature
signalling lamp is on)
Thermostat unblock in network module -
TB
Insufficient water circulation
(the pump doesn’t work)
filter before the pump clogged
* Switch over the revolutions
Check the pump operation (rotor release)
Pump replacement
Filter before the pump clogged Clean the filter
Lack of water in system
Check the water pressure in system and if
necessary refill water
* Check the pressure in expansion
reservoir (if there is used a closed heating
system)
4. burner defect signalling The pump thermostat does not
switch on exchange the thermostat
Possible defects and the way of their elimination are shown in burner
documentation
13. Guarantee and liability for defects
Setting up a claim to responsibility for defects is ruled by § 422-441 and for indemnity by § 373-386
Commercial Code.
VIADRUS a.s. provides the guarantee:
–For boilers 24 months after the boiler putting into operation, but maximum 30 months after the date it was
dispatched from the manufacturing factory.
–For boiler drum 5 years after the date its dispatch from the manufacturing factory.
The manufacturer requires for guarantee applicability:
–In sense of Act no. 222/94 Coll.„On business conditions and government administration in certified
branches and on State electricity inspection “ and ČSN 38 6405, EN 1775 to carry out regularly once a
year the check of natural gas or furnace oil extra light TOEL boilers. The checks can only be done by an
authorized organization (contractual service), accredited by VIADRUS a.s., the manufacturer.
–In case of 5 segmental boilers it is necessary to observe the conditions set by Collection of Laws
no. 91/1993 and ČSN 07 0703, ČSN 38 6420.
–In case of VIADRUS G 50 in 5 segmental design the List of documents for a revision book
according to regulations issued by Czech Office for labour safety to secure the labour safety in
low-pressure steam-boiler rooms (91/1993) is a part of commercial & technical documentation.
–To document all records about carried out guarantee and after-guarantee repairs and regular annual
checkups in the annex enclosed to the guarantee certificate.
The guarantee does not apply to:
–Faults caused by improper assembly and improper attendance of the product and faults caused
by improper maintenance see chap. 10
–Product damage arised during the transport or other mechanical damage
–Faults caused by rought storage
–Faults and damage caused by failure to observe water quality in heating system see chap. no. 5.1
and 6.3 or by using the anti-freeze mixture
–Faults caused by failure to observe instructions stated in this manual
Every defect must be announced immediately after having been found out, always in writing and by
an agreement made by telephone.
If the above instructions are not observed then the manufacturer will not provide the guarantees.
The manufacturer reserves the right to make changes within the product innovations that needn’t be
included in this manual.

18
Information for customer
Packaging identification
PE Plastic sacks, folie, corrugated board, iron and plastic fix
line
Assessment reference
Identification of principal materials used. Paper, Polyethylene, iron, wood
Part 1: Summary of assessment
Standard/Report Assessment requirement Claim Note
1.1 Prevention by source
reduction YES
1.2 Heavy metals and ensure below maximum permitted levels
for components
(CR 13695-1) YES
1.3 Other
noxious/hazardous
substances
ensure in compliance with
(ČSN 77 0150-2, EN 13428) YES
2 Reuse ensure reusability in all terms of the
standard for the functional packaging unit
(EN 13429) NO
3.1 Recovery by material
recycling ensure recyclability in all terms of the standard for the functional packaging unit
(EN 13430) YES
3.2 Recovery in the form
of energy ensure that calorific gain is achievable for the functional packaging unit
(EN 13431) YES Iron - NO
3.3 Recovery by
composting ensure compost ability in all terms of the standard for the functional packaging unit
(EN 13432) NO
NOTE Conformity with EN 13427 requires affirmative responses to sections 1.1; 1.2; 1.3 and to at
least one of 3.1; 3.2; 3.3. In addition, where a claim of reuse is made section 2 should also
record affirmative responses.
Part 2: Statement of conformity
In the light of the assessment results recorded in part I above, this packaging is claimed to comply
with the requirements of EN 13427.

19
Intended for user VIADRUS a.s. Bezručova 300
735 81 Bohumín
Guarantee certificate and Quality and completeness certificate
for VIADRUS G 50 … boiler
Boiler serial number ..............................…… Boiler output ......................................
User (surname, name) ………………………………………………………………………………
Address (street, town, postcode) ………………………………………………………………………………
Telephone/Fax ………………………………………………………………………………
Service gas overpressure: 18 – 23 mbar natural gas furnace oil extra light
according to burner documentation
Boiler complies with requirements:
EN 267 Forced draught oil burners – Definitions, requirements, testing, marking
EN 297 Gas – fired central heating boilers – Type B
11
and B
11BS
fitted with atmospheric burners of nominal heat
input not exceeding 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
EN 676 Automatic forced draught burners for gaseous fuels
VIADRUS a.s. provides the guarantee:
– For boilers 24 months after the boiler putting into operation, but maximum 30 months after the date it was
dispatched from the manufacturing factory.
– For boiler drum 5 years after the date its dispatch from the manufacturing factory.
The adjustment according to boiler operation manual operation and installation will be done by contractual
service organization.
The completeness including the standard accessories and the output setting according to „Operation and
installation manual“ is guaranteed by manufacturer through its contracting service organization.
The guarantee certificate isn’t valid without having been filled in.
Stoking test results:
Measured values Numeric value
Gas input pressure (mbar)
pressure at the nozzle (mbar)
Hourly consumption (m3. h
-
1
, kg.h
-
1
)
The user confirms that:
•the boiler adjusted by the contracting service organization didn’t show any defect during the stoking test
•he received the „Operation and installation manual“ with properly filled-in guarantee certificate and Quality
certificate
•he was made acquainted with boiler operation and maintenance
……………………………………………… ……………………………………………… ………………………………………………
Manufacture date Manufacturer’s stamp Controlled by (signature)
……………………………………………… ……………………………………………… ………………………………………………
Date of installation Installation company
(stamp, signature) User’s signature
……………………………………………… ……………………………………………… ………………………………………………
Date of putting into operation Contractual service organization
(stamp, signature) User’s signature

20
Annex to the guarantee certificate for customer- the user
Record of accomplished guarantee and after-guarantee repairs and regular product checpc
Record
date Carried out activity Contracting service
organization
(stamp, signature)
Customer
´s signature