Viadrus GRAND G 36 Instruction Manual

Hercules U26
Návod k obsluze
VIADRUS GRAND G 36
MANUAL FOR BOILER OPERATION
AND INSTALATION

Table of contents page
1. Manufactured boiler variants....................................................................................................................3
1.1 Purchase order.....................................................................................................................................3
2. Boiler use and advantages ......................................................................................................................3
3. Technical data of boiler............................................................................................................................4
4. Boiler description .....................................................................................................................................5
4.1 Boiler construction................................................................................................................................5
5. Regulation................................................................................................................................................7
5.1 Control, safety and regulation elements...............................................................................................7
5.1.1 Equitherm regulation.....................................................................................................................7
5.2 Electric wiring diagrams .....................................................................................................................10
6. Circulation pumps..................................................................................................................................13
7. Stack hot service water heaters.............................................................................................................13
7.1 Technical data of recommended hot service water heaters ..............................................................13
7.2 Heater construction............................................................................................................................14
7.3 Honeywell V 4044F three-way valve technical data...........................................................................16
8. Positioning and installation.....................................................................................................................16
8.1 Regulations and directions.................................................................................................................16
8.2 Positioning possibilities.......................................................................................................................17
9. Delivery and assembly...........................................................................................................................19
9.1 Delivery and accessories ...................................................................................................................19
9.2 Assembly procedure...........................................................................................................................20
10. Commissioning- instructions for contractual service organization.........................................................22
10.1 Verification activities before commissioning...................................................................................22
10.2 Commissioning...............................................................................................................................23
11. Boiler operation by user.........................................................................................................................25
12. IMPORTANT WARNINGS.....................................................................................................................26
13. Maintenance ..........................................................................................................................................27
14. Instructions for disposal of product after its service life expiration.........................................................27
15. Defects and their elimination..................................................................................................................28
16. Guarantee and liability for defects .........................................................................................................29

3
Dear customer,
we thank you that you have bought the VIADRUS GRAND G 36 gas 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. 11 – Boiler operation by user and chapter no.
12 – Important warnings). Please follow the undermentioned information especially the prescribed
annual inspections carried out by a professional firm in order to guarantee a long-time and trouble-
free boiler operation to both your and our satisfaction.
1. Manufactured boiler variants
1.1 Purchase order
In the purchase order it is necessary to define following data:
Purchase order specification code
G 36 X X
2. Boiler use and advantages
Cast-iron sectional gas boiler VIADRUS GRAND G 36 equipped with atmospheric burner is designated for
combustion of low-pressure natural gas. The boiler is manufactured in design B
11BS
, it means it is equipped
with combustion products return flow fuse. The three sectional size is suitable for heat sources
reconstructions in individual flat units and for smaller housing and recreation facilities. The bigger sizes suit
the demands on heating the houses, shops, schools etc.
The boiler is only manufactured in hot water design with forced circulation and working overpressure up to
400 kPa (4 bar). Before dispatch it is checked for tightness by test overpressure 800 kPa (8 bar); it stands the
insulation and transient resistance tests.
If you require preferential heating of hot service water you can order separately stationary VIADRUS
OV 100L heater the design of which corresponds to VIADRUS GRAND G 36 boiler.
By its electric connection the boiler is adjusted to the connection of the stack hot service water heater
ensuring the service water preferential heating.
The heating (convection) surfaces of the boiler drum achieve a high use of heat contained in combustion
products. Thanks to the use of high quality cast-iron the boiler is able to transfer the absorbed heat maximally
to the heating water, this evenly to all parts of boiler.
Boiler advantages:
1. A high operating liability and long service life thanks to high quality grey cast iron with lamellar graphite.
2. High boiler efficiency up to 92 %.
3. Regulation and safety elements reliability.
4. Equipped with combustion products return flow fuse which in case of an insufficient chimney draught
shuts down the boiler thus increasing the boiler safety.
5. Possibility to connect some of offered superior regulations according to the customer's demand on the
heating comfort level.
6. A combustion space enables a clean flame burnout.
7. The boiler enables to connection to stack hot service water heater and guarantees its preferential
heating.
8. Simple operation and maintenance.
Regulation:
0: standard delivery
1: space thermostat CM 707 (optionally the pump thermostat)
6: regulation A1
7: regulation A2
8: regulation A3
9: regulation A4
Regulation is delivered in a separate packing, the connection must be done in place
of boiler installation.
Boiler size:
3: 3 sect.design
4: 4 sect.design
5: 5 sect.design
6: 6 sect.design
7: 7 sect.design

4
3. Technical data of boiler
Tab. no.1 Dimensions, operating temperatures a electrical values of boiler
Number of sections pc 3 4 5 6 7
Boiler design B
11BS
Appliance category I
2H
Heat output G 36 - natural gas kW 12-17 18-26 27-34 35-41 42-49
Weight kg 100 123 147 175 199
Water space volume l 9,2 11,4 13,6 15,8 18
Diameter of smoke socket mm 110 130 160 170 180
Boiler dimensions - width mm 485 485 570 740 740
- depth x height mm 733 x 935 773 x 935
Water working overpressure kPa
(bar) 400 (4)
Water test overpressure kPa
(bar) 800 (8)
Heating water maximum temperature °C 85
Return water minimum temperature °C 45
Noise level dB max. 65 dB (A)
Chimney draught mbar min. 0,025
Boiler connections - heating water Js 1 1/2“
- return water Js 1 1/2“
- gas Js ½"
Connecting voltage 1/N/PE 230 V AC 50 Hz TN-S
Electric input kW 0,1
Electric coverage IP 40
Tab. no. 2 Thermal - technical parameters of G 36 boiler equipped with SINGLE STAGE GAS VALVE
and designated for NATURAL GAS combustion
(thermal power 34,16 MJ.m
-3
, gas temperature 15 °C and bar. air pressure 1013,25 mbar)
Number of sections pc 3 4 5 6 7
Rated heat output maximum kW 17 26 34 41 49
Rated heat output minimum kW 12 18 27 35 42
Rated heat input maximum kW 18,5 28,5 37 45 53,7
Rated heat input minimum kW 13,3 19,9 29,9 38,8 46,5
Gas volume flow rate at maximum heat output m
3
.h
-
1
1,980 2,953 3,920 4,727 5,605
Gas volume flow rate at minimum heat output m
3
.h
–
1
1,390 2,072 3,141 4,041 4,837
Efficiency at maximum heat output % 90,5 – 92
Efficiency at minimum heat output % 90,5 – 90
No
x
category 2
Combustion products temperature in smoke flue at
maximum heat output °C 90 – 120
Combustion products temperature in smoke flue at
minimum heat output °C 80 – 90
Real volume of dry combustion products at maximum
heat output m
3
.m
-3
23,33 19,23 23,89 20,66 18,25
Real volume of dry combustion products at minimum
heat output m
3
.m
-3
25,09 27,52 28,67 23,65 25,09
Connecting gas overpressure kPa
(mbar) 2 (20)
Gas overpressure on burner nozzles at maximum heat
output kPa (mbar) 1,32 (13,2) 1,58 (15,8) 1,42 (14,2) 1,47 (14,7) 1,43 (14,3)
Gas overpressure on burner nozzles at minimum heat
output kPa (mbar) 0,68 (6,8) 0,78 (7,8) 0,89 (8,9) 1,08 (10,8) 1,06 (10,6)
Number of cool. sticks on a tube pc 3 3 3 3 3
Number of nozzles pc 2 3 4 5 6
Nozzles diameter mm 2,52 2,52 2,52 2,45 2,45
Connecting gas overpressure kPa
(mbar) 1,3 (13)
Gas overpressure on burner nozzles at maximum heat
output kPa (mbar) 1 (10) 1,1 (11) 1,1 (11) 1,17 (11,7) 1,15 (11,5)
Gas overpressure on burner nozzles at minimum heat
output kPa (mbar) 0,47 (4,7) 0,48 (4,8) 0,68 (6,8) 0,88 (8,8) 0,86 (8,6)
Number of cool. sticks on a tube pc 3 3 3 3 3
Number of nozzles pc 2 3 4 5 6
Nozzles diameter mm 2,7 2,7 2,7 2,7 2,7
Note: At a single stage valve the heat output is pre-set by the manufacturer to the maximum.

5
Pressure loss & flow diagram
0
1000
2000
3000
4000
5000
6000
7000
8000
0 0,1 0,2 0,3 0,4 0,5 0,6
Q [dm
3
/s]
p
z
[Pa]
3 články
4 články
5 článků
6 článků
7 článků
4. Boiler description
4.1 Boiler construction
The cast-iron sectional boiler drum made of grey cast iron according to:
ČSN 42 2420 - „Cast iron 42 2420 with laminated graphite“ is the main part of the boiler.
The boiler construction corresponds 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 exceeding 70 kW
The boiler output is determined by number of sections. Individual sections are connected by means of forced
on insertions φ47 mm (length 36 mm, angle 1°45") and are tightened by anchor bolts thus creating the
combustion space, convection surface and boiler water volume inside the sections. The heating water inlet
and outlet in the rear part of boiler is equipped with pipes 1 1/2”. At the return water connection there is
installed the discharge valve. At the heating water outlet there must be installed an automatic bleeder valve
which is included in the serial delivery. The whole boiler drum is insulated by using a harmless mineral
insulation, which reduces the losses caused by heat transfer to the ambient.
To the upper part of boiler drum there is fastened by means of screws an inbuilt draught diverter with the
neck for putting on a smoke pipe. The draught diverter is equipped with a dismountable cleaning cover.
The boiler drum is positioned on a steel base closing the burner space from below. The anticorrosive steel
cover plate and thermal insulation belong to the boiler drum.
The boiler steel shell surface is coated with a good quality comaxit paint.
We offer the stationary boiler with the security and control automatics in the natural gas version with the
lighting burner.
For VIADRUS GRAND G 36 boiler the atmospheric burner consists of a round tubes type 5T with cooling
rods.
3 sect.
4 sect.
5 sect.
6 sect.
7 sect.

6
1 - Boiler section right
2 - Boiler section middle
3 - Boiler section left
4 - Plug Js 1“
5 - Insertion
6 - Anchor bolt
7 - Thermostat reservoir 1/2"
8 - Return valve to the thermomanometer 1/2"
9 - Inlet tube Js 1 1/2"
10 - Outlet tube Js 1 1/2"
11 - Boiler isolation
12 - Inbuilt draught diverter
13 - Inbuilt draught diverter insulation
14 - Combustion space cover.plate with isolation
15 - The frontal part of boiler shell
16 - Side shell right
17 - Side shell left
18 - The upper part of boiler shell
19 - The rear part of boiler shell
20 - Base
21 - Panel rear part
22 - Electric panel bracket
23 - Shade
24 - Inlet PG 9
25 - Inlet PG 11
26 - Electric panel
27 - Electric panel cover
28 - Thermomanometer
29 - Network module
30 - Blind flange L&G big 96x96
31 - Blind flange L&G small with thermomanometer
32 - Boiler thermostat
33 - Safety thermostat
34 - Combustion products thermostat
35 - Green switch with orange indicator lamp
36 - Button RESET
37 - Switch I/II
38 - Fuse box
39 - Burner tube
40 - Ignition pilot burner Polidoro
41 - Burner plate
42 - Gas supply pipe
43 - Honeywell valve
44 - Honeywell automatics
45 - Bracket
Fig. no. 1 Boiler assembly VIADRUS GRAND G 36

7
5. Regulation
5.1 Control, safety and regulation elements
As a standard the boiler is delivered without the
superior regulation and equipped with control
panel with network module.
The manufacturer does not recommend to
operate boiler without regulation. The standard
version (without regulation) is determined for
customers who have their own system of boilers
control.
Besides the network module in the control panel
there is mounted the combined device- the
thermomanometer.
The network module is equipped with following elements (according to individual boiler variants):
- the main switch with signalling
- exceeded temperature signalling (safety thermostat and combustion products return flow fuse)
- automatics failure unblocking
- blind flange
- safety thermostat unblocking (at the open systems keep the setting by manufacturer it means to 97 °C)
at the closed systems with pressure expansion reservoir can be set up to 105 °C)
- combustion products return flow fuse unblocking (set to 75 °C)
- boiler thermostat (0 – 85 °C range, recommended to be set to 85 ºC)
- network fuse 2,5 A
The combustion products return flow fuse sensor is installed in horizontal draught diverter and in case of
insufficient combustion products exhaustion it closes down the boiler. The sensors of boiler and safety
thermostats (possibly also the of pump thermostat) and of the thermometer are installed in the reservoir of
left outer section and the manometer clack valve is installed in upper part of the right outer section.
5.1.1 Equitherm regulation
Optionally together with boiler there is delivered one of four kinds of regulation, or their combination
according to the purchase order key stated in chapter no. 1.1. The regulators are delivered in a
separate packing and in the place of boiler installation there is mounted the control panel according
to the requirements. The vacant places in panel are in standard delivery equipped with blind flanges.
The most important characteristics of Siemens regulators:
equitherm regulation
a quick inhibition and a quick change in heating medium temperature (quick inhibition and a quick
heating)
summer/ winter automatic switching-over
boiler relief when starting
boiler protection against overheating (pump operation drifting)
pre-setting of minimum and maximum value of boiler heating water temperature (boiler outlet heating
water temperature)
anti-freeze protection of buildings and facilities
pumps protection by means of a regular start
heating schedule (every day during a week can be programmed separately)
possibility of mutual co-operation of up to 16 regulators in RVA series…
when connecting the indoor device QAA50 or QAA70 it is possible to control the boiler remotely and there
is guaranteed the adaptation of heating curves in dependence on buildings construction and heat
consumption.
On top of it RVA 33.121, RVA 43.222 and RVA 63.280 regulators have:
the function of a “ chimney sweeper” – the boiler is automatically set into operation for required
combustion products measurement- the boiler is operated in full swing regardless the preset automatic
regime.
Registration of operation hours and number of burner starts

8
A1 - EQUIHERM REGULATOR RVA 43. 222
Is the regulator for boiler and heating circuit for: double stage burner, with the possibility to produce
HWS, with pump heating circuit (without a mixing valve).
Other regulator characteristics:
• heating circuit regulation with circulation pump
(without a mixing valve) or a cascade connection
(up to 4 boilers)*
A2 - EQUITHERM REGULATOR RVA 46. 531 + RVA 43.222
Is a set of boiler and heating circuit regulators for: double stage burner, with the possibility to produce
HWS incl. the mixing valve in heating circuit.
Other regulator characteristics:
• Suitable first of all for a cascade connection (up to
16 boilers) *
A3 - EQUITHERM REGULATOR RVA 63.280
Is a boiler and heating circuit regulator for: double stage burner, with the possibility to produce HWS with
two sensors, incl. two mixing valves.
Other regulator characteristics:
• The heating circuits can be preset as independent
(two independent heating circuits) or as
dependent (floor heating combined with radiators)
• The independent schedule for hot service water
preparation
A4 - EQUITHERM REGULATOR RVA 33. 121
Is a boiler and heating circuit regulator for: single stage burner, with the possibility to produce HWS
s with pump heating circuit (without a mixing valve).
Other regulator characteristics:
• The independent schedule for hot service water
preparation
• No other RVA regulators can be connected
* Note:
In case of a cascade connection every boiler must be equipped with RVA 43.222 regulator and at least
one boiler also with RVA 46.531 regulator (number of RVA 46.531 regulators must correspond to the
number of operated heating circuits).
The regulator is enclosed according to the purchase order including a separate operation manual. As
a standard the regulators are delivered incl. QAZ 21 immersion thermometer sensor for heating
water.

9
The boiler is equipped with:
SINGLE STAGE COMBINED ELECTROMAGNETIC VALVE HONEYWELL VK 4100 A 1002
–The boiler can only be operated at the output which can be firmly set according to tab. no. 2 (adjustment
can only be done by a contractual service organization trained by manufacturer)
–It enables the connection of all both offered types of regulation (Honeywell CM 707 programmable
regulator or A1 – A4 regulation)
We offer the burner ignition designs as follows:
Polidoro ignition pilot burner
The burner ignition and watching operations are provided by low-emission ignition pilot burner. If the main
burner ignition is required there automatically after T
w
= 1 s waiting time the inbuilt lighter is switched on and
the ignition pilot burner gas valve opens. The ignition sparkle lights the ignition pilot burner and its flame will
be then sensed by the flame sensor. After the ignition pilot burner flame has settled the ignition is switched off
and the main valve for main burner gas supply will open. If the ignition pilot burner does not ignite during T
s
=
50 s safety time then the blocking automatics will switch on. If the flame goes out during the normal operation
the ignition automatics will repeat the ignition cycle.
The ignition pilot burner is switched off together with the main burner.
Other controlling, safety and signalling elements are installed in boiler control panel which is equipped with
network module with elements as follows:
- the main switch
- exceeded temperature signalling (link to the safety thermostat and combustion products return flow fuse)
- automatics reset
- output switch (only at the boilers equipped with double stage electromagnetic valve)
- fuse 2,5 A
- safety thermostat reset (set to 97 °C)
- combustion products return flow fuse reset
- boiler thermostat (delivered as standard with 0 - 85°C range)
The control panel is then equipped with a combined thermometer and manometer. The combustion products
return flow fuse sensor is installed in horizontal draught diverter and it shuts down the boiler in case of an
insufficient combustion products exhaustion.
The boiler and safety thermostat sensors are installed in a reservoir (in upper part of left outer section), the
manometer return valve is crewed in upper part of right outer section.
Fig. no. 2 Polidoro ignition pilot burner
ionising electrode
electrodes screw
ignition electrode
NOZZLES TABLE
Nozzles diameter
(mm)
NOZZLE
NATURAL GAS 0,45

10
5.2 Electric wiring diagrams
Fig.no. 3 VIADRUS GRAND G 36 wiring diagram for version ZP 1°with Honeywell automatics with
the possibility to connect three-way valve and pump
(Note: The exhaust fan is only used in case of VIADRUS GARDE G 42 boiler)
Legend: F1 Fuse 2,5A S1 main switch H1 “boiler under voltage” signalling Z1 suppression component TC241 BT2 combustion products thermostat H2 “failure” signalling BT1 safety thermostat BT4 boiler thermostat M9 combustion products ventilator
E1 ignition electrode E2 ionising electrode Y1 VK4100 A 1002 gas valve A1 S 4565 BF 1112 1 Honeywell automatics S3 Reset button H3 “ionising failure” signalling Y2 three-way valve BT7 TUV heater thermostat BT5 indoor thermostat BT8 circulation pump thermostat Q1 circulation pump

11
Fig. no. 4a) VIADRUS GRAND G 36 wiring diagram for version ZP 1° with Honeywell automatics
Z1
suppression component
X1, X11
boiler terminal boards,
M9
combustion
products
ventilator
Y2
three-way
valve
Q1
circulation
pump
BT8
circulation
pump
thermostat
BT7
HWS
heater
thermostat
BT5
indoor
thermostat
drum
distribution box
Conductor colour: GNYE= green-yellow RD= red BK= black BN= brawn BU= blue
Boiler
drum

12
Fig. no. 4b) VIADRUS GRAND G 36 wiring diagram for version ZP 1° with Honeywell automatics
Legend: A1 ionising automatics Honeywell S4565 BF 1112 1 Y1 gas valve VK 4100 A 1002 E1 ignition electrode E2 ionising electrode BT2 combustion products thermostat BT1 safety thermostat BT4 operating thermostat S1 main switch H1 “boiler under voltage” signalling H2 failure signalling H3 ionising failure signalling S3 reset button F1 2,5 A fuse
burner
network module

13
6. Circulation pumps
To the boiler you can order a three-speed circulation pump Grundfos UPS 25-40. The pump operation is
controlled according to electric interconnection of the boiler with selected regulation:
1. Standard boiler design (without regulation) – after having switched on the boiler using the main switch the
circulation pump is running (unless the pump thermostat is connected).
2. Boiler equipped with a programmable regulator Honeywell CM 707 – the pump is controlled by the indoor
thermostat
3. Stack water heater connection - the pump is controlled by the heater thermostat; after its disconnection
the indoor thermostat takes over the control functions.
4. Boiler equipped with equitherm regulator according to regulation A1 - A4 -the pump operation is controlled
according to regulator programme (see. chap. 5.1)
Fig. no. 5 Grundfos UPS 25-40 pump characteristics
7. Stack hot service water heaters
7.1 Technical data of recommended hot service water heaters
Tab. no. 3 Thermal-technical parameters of VIADRUS OV 100 L heater
Heater volume l 100
Heater heat output (spiral heating wire) kW 23
Heating insertion (heater) heat transfer surface m
2
~ 0,9
Connections: - heating water Js 3/4“
- hot service water Js 1/2“
Heater dimensions: - height mm 886
- width mm 574
- depth mm 587
Weight kg 60
Heating body rated overpressure kPa
(bar) 400 (4)
Maximum working overpressure for HWS kPa
(bar) 600 (6)
Adjustment range °C 0 – 90 °C ***)
Time for water heated from 10 °C to 60 °C
(boiler output 26,5 kW and water temperature 85 °C) *)
min 14
Water flow rate (boiler output 26,5 kW) **) l/h 610
Connecting voltage 1/N/PE 230 V AC 50 Hz TN-S
Electric coverage IP 40
Environment normal, according to ČSN 33 2000-1 ed. 2

14
0
5
10
15
20
25
30
35
40
0 10 20 30 40 50 60
výkon kotle (kW)
doba ohřevu (min)
0
100
200
300
400
500
600
700
0 10 20 30 40 50 60
výkon kotle (kW)
průtok vody (l/hod)
Fig. no. 6 OV 100 L water heater characteristics
The stated heating intervals and water flow rates apply in case that in the heating system there is installed the
Grundfos pump and its revolutions switch is in position 3 (corresponds to 650 l/h flow rate.) If the pump works
with lower revolutions (lower flow rate), the time necessary for hot service water heating will be longer.
***) IMPORTANT WARNINGS!
Set the thermostat of the heater to max. 60 °C temperature (note: The regulations in the Czech Republic do
not allow do distribute water of temperatures higher than 60°C).
Once a week set the thermostat of the heater to 65 °C temperature in order to avoid the formation of
legionella (bacillary bacteria originating in water. They die between 60 and 65 °C temperature within several
minutes and at 70 °C temperature they die within several seconds.).
7.2 Heater construction
To the boiler you can order VIADRUS OV 100L separate stack heater for a preferential hot service water
preparation in the same design as G 36 boiler. The reservoir is thermally insulated by using polyurethane and
its internal surface is coated by double enamelled layer which guarantees a long service life. The operation
and installation manual is enclosed to the heater.
The boiler standard electric connection is adjusted to Honeywell V 4044 F three-way valve connection
ensuring the HWS preferential heating. The thermostat is a part of heater.
OV 100 L
OV 100 L
*) For a boiler output
different from 26,5 kW
and at the same
conditions like those
stated in table the heating
interval varies as follows:
**) The water rated flow is
stated at 85 °C heating
water temperature and hot
service water temperature
gradient 35 °C (TUV inlet
temperature 10 °C, TUV
outlet temperature 45 °C).
If for the heater a boiler
with an output different
from 26,5 kW is used, then
the water flow rate at
keeping the above
mentioned inlet conditions
varies as follows:
Time for water
heated (min)
Heat output (kW)
Heat output (kW)
Water flow rate
(l/hour)

15
Fig. no. 7 VIADRUS OV heater diagram 100 L (dimensions in mm)
Fig. no. 8 Recommended diagram for connection with preferential HWS heating
Legend:
1 boiler
2 water heater
3,14 stop valves
4 bleeder valve
5 three-way valve
6,13 clack valve
7 pump
8 expansion reservoir
9 safety valve
10 discharge valve
11 manometer
12 safety valve
15 testing cock
16 radiator, vale
Note: It is possible to use a combined fitting consisting of a safety valve and a clack -valve.
Hot service valve inlet
Cold service
water inlet
heating water
inlet
return
water inlet
1 network module
2 thermostat
3 thermometer
4 reservoir of thermometer probes
5 heated water outlet
6 heated water inlet
7 anodic protection bar
8 side part of the shell
9 reservoir 100 l
10 base
11 frontal part of the shell
12 heating water outlet
13 rear part of the shell
14 heating water inlet
15 electric panel
16 upper part of shell

16
7.3 Honeywell V 4044F three-way valve technical data
Tab. no. 4 Honeywell V 4044F motor driven zonal three-way valve technical parameters
Maximum differential pressure for closing the valve
(max. pressure difference between the inlet and
outlet that the valve can work with)
kPa
(bar)
55
(0,55)
Maximum ambient temperature °C 50
Heating water temperature °C 5 - 88
Mating dimensions (heating water inlet and outlet) Js Internal thread 1“
Connecting voltage 1 /N/PE 230 V 50 Hz/TN-S
Electric coverage IP 40
Environment according to ČSN 33 2000 - 7 – 701 ed. 2 the
boiler must not be installed in 0,1,2 zones
Note: A five-core connecting cable is delivered together with the valve
1 2 3 4 5 Pressure loss [m of water column]
Fig. no. 9 Honeywell V 4044F three-way valve characteristic
8. Positioning and installation
8.1 Regulations and directions
Boiler can be installed by a company holding a valid license to install and maintain the gas
appliances. 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 297 Gas – fired central heating boilers – Type B
11
and B
11BS
fitted with atmospheric
burners of nominal heat input not exceeding 70 kW
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
Pressure loss dependence
on the flow rate
Flow rate (l/min)
100
80
60
40
20

17
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
ČSN 38 6462 Gas supply system - LPG - Pressure stations, distribution and consumption
Act no. 222/94 Coll. on the conditions of enterprise and public service performance in power industry
sector and on the state energy inspection
c) 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 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
d) to the chimney
ČSN 73 4201 Chimneys and flue gas ducting– designing, implementation and connection of
fuel consumers.
e) regarding the fire regulations
ČSN 06 1008 Fire safety of heat installations.
EN 13501-1 + A1 Fire classification of construction products and building elements – Part 1:
Classification using test data from reaction to fire tests.
f) 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
8.2 Positioning possibilities
Boiler can be installed in the basic environment AA5/AB5 according to ČSN 33 2000-1 ed. 2. It must not be
installed in zones 0,1 and 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.
Boiler positioning with regard to the fire regulations:
1. Positioning on the floor made of combustible material
−Install the boiler on a incombustible thermally insulating pad exceeding the boiler ground-plan by
15 mm on all sides.
−If the boiler is installed in a cellar we recommend its installation on a retaining wall at least 50 mm
high.

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2. Safe distance from the 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.
3. Positioning of a boiler designated for propane combustion must comply with ČSN 38 6462.
Tab. no. 5 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,…
Positioning of a boiler with regard to the necessary handling space:
−in front of boiler there must be left the handling space minimum 1000 mm
−minimum distance between the rear part of boiler and the wall is 400 mm
−at least from one side part there must be kept the space for accessing the rear part of boiler (minimum
600 mm)
−minimum distance from the side wall is 200 mm, in case of delivery together with heater OV 100L it can be
positioned alongside the boiler from the left and right hand side (the boiler shell at this way of installation
can only be dismantled after the heater shell has been dismantled)
Air supply requirements:
The boiler can only be installed in a room with a sufficient air supply according to EN 1775 "Gas
supply- Pipelines in buildings– maximum operating pressure ≤5 bar – Operating requirements "
Number of sections 3 4 5 6 7
Natural gas– output in kW 12-17 18-26 27-34 35-41 42-49
B 485 485 570 740 740
Fig. no. 10 Boilers positioning in a boiler room
min. 400
mm
min.
10
00
mm
min. 600 mm
min. 200 mm

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9. Delivery and assembly
9.1 Delivery and accessories
VIADRUS GRAND G 36 boiler is delivered in an assembled conditions, on a pallet, protected by a foil and
equipped (optionally) by one of four offered types of regulation.
Standard accessories to all boiler variants:
Automatic bleeder valve 1 pc
TE joint reduced 90° 1 x 1/2“ 1 pc
Discharge valve 1 pc
Retaining plate 425315 REGULUS 1 pc
Screw F/H 4,8 x 13 1 pc
Conductor inlets PG 9 4 pc
Conductor inlets PG 11 3 pc
Blind flanges PG 9 4 pc
Blind flanges PG 11 4 pc
Manual for boiler operation and installation,
incl. the guarantee certificate

Sect. 3 4 5 6 7
screw M 4 x 8 pc 5 5 7 7 14
washer ¯4,3 pc 10 10 14 14 28
nut M 4 pc 5 5 7 7 14
Optionally:
VIADRUS OV 100L stack heater
- Honeywell V 4044F three-way valve (for preferential HWS heating)
Grundfos UPS 25-40 circulation pump
- Js 1“ clack valve with a flange for pump connection
- Spherical valve Js 1“with a flange for pump connection
- Pump thermostat
Regulation according to purchase order specification code:
- Space thermostat CM 707
- Regulation A1: 1 pc regulator RVA 43.222 set of connectors SVA 43.222, terminal board WAGO 63
with a conductor bundle 43, submersible sensor B2 (type QAZ 21).
- Regulation A2: 1 pc regulator RVA 43.222, 1 pc regulator RVA 46.531, set of connectors SVA
43.222 and SVA 46.531, terminal board WAGO 46 with a conductor bundle 46,
submersible sensor B2 (type QAZ 21).
- Regulation A3: 1 pc regulator RVA 63.280, set of connectors SVA 63.280, terminal board WAGO 63
with a conductor bundle 63, submersible sensor B2 (type QAZ 21), outside sensor B9
(type QAC 31).
- Regulation A4: 1 pc regulator RVA 33.121, set of connectors SVA 33.121, terminal board WAGO 33
with a conductor bundle 33, submersible sensor B2 (type QAZ 21)
It possible to order accessory for regulation:
- Types of sensors: - outside temperature sensor QAC 31
- submersible temperature sensor QAZ 21 (can also be used for
HWS heating)
- surface temperature sensor QAD 21
- Space instrument type: - indoor sensor QAA 70
- indoor sensor QAA 50
Regulation is delivered in a separate package. The regulators must be connected to the electric panel in
place of the boiler installation.
Optional boiler equipment isn’t included in boiler basic price.
Fig. no. 11 Pump thermostat connection- delivery on call
circuit diagram wiring diagram

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9.2 Assembly procedure
1. Put the boiler on the required standpoint (it is necessary to respect the demands on boiler positioning
stated in chap. 8) according to the project documentation. We recommend to transport the boiler to
the determined standpoint while on a pallet, possibly still wrapped in protective packing. If this isn’t
possible due to the space restrictions the boiler is transported without the packing by transferring it by
using the boiler base plate in which there are on the left and right hand side prepared two circular
openings determined for putting on the “ removal hooks”. By means of hooks the boiler can be lifted and
transported to the required standpoint. It is forbidden to use the gas and heating water pipes for
lifting the boiler.The boiler must stand fast on the incombustible pad in its vertical position and well–
balanced.
2. Mount the TE-joint at the heating water outlet from boiler, the discharge valve at the heating water inlet
and automatic bleeder valve (Fig.no.12) at the heating water outlet. The parts are delivered together with
the boiler.
3. Connect to the heating system according to project documentation.
ídržný plech pro
tného toku spalin
ovací ventil
nástavec
horizontálního
přerušovače tahu
(jen pro 7 čl.velikost
horizontální
přerušovačtahu
odbočka TE
redukovaná 90
vypouštěcí ventil
Fig. no. 12 Connection to the heating system and the draught diverter assembly
Number of sections 3 4 5 6 7
natural gas– output in kW 12-17 18-26 27-34 35-41 42-49
D 110 130 160 170 180
T 340 420 500 580 660
T1 165 205 245 285 325
B 485 485 570 740 740
L 733 733 733 773 773
Fig. no. 13 Dimensions for connection
T
-
kus
retaining plate for
combustion products
return flow fuse
automatic
bleeder valve
T-piece
horizontal draught diverter
extension
(only for 7 sectional size)
horizontal draught diverter
TE extension reduced 90
discharge valve