Unigas NG70 M-.AB 15, NG70 M-.TN 10, NG90 M-.AB 10, NG90 M-.AB 15, NG70 M-.TN 15 Technical Manual Of Installation, Use And Maintenance

...

LG/NG/NGX70

LG/NG90

Idea Series

Gas burners

MANUAL OF INSTALLATION - USE - MAINTENANCE

BURNERS - BRUCIATORI - BRULERS - BRENNER - QUEMADORES -

M039135CG Rev. 6 07/2008

ГОРЕЛКИ

C.I.B. UNIGAS - M039135CG

TABLE OF CONTENTS

WARNINGS ............................................................................................................................................................... 3

PART I - INSTALLATION .......................................................................................................................................... 5

Specifications .................................................................................................................................................................................. 5

Country and usefulness gas categories .......................................................................................................................................... 7

Performance curves ...................................................................................................................................................................... 10

Pressure in the network / gas flow rate curves ........................................................................................................................... 11

MOUNTINGS AND CONNECTIONS ............................................................................................................................................ 13

Packing ......................................................................................................................................................................................... 13

Fitting the burner to the boiler ....................................................................................................................................................... 13

Matching the burner to the boiler................................................................................................................................................... 13

Installing the gas train ................................................................................................................................................................... 14

ELECTRICAL CONNECTIONS .................................................................................................................................................... 15

Power supply without neutral ........................................................................................................................................................ 16

ADJUSTING THE AIR AND GAS FLOW RATES ......................................................................................................................... 17

Combustion head pressure curves vs. the gas flow rate .............................................................................................................. 17

Measuring the gas pressure in the combustion head ................................................................................................................... 17

Plugs for pressure measurement .................................................................................................................................................. 18

Pressure in combustion head - gas rate curves ............................................................................................................................ 18

Adjusting the air and gas flow rates .............................................................................................................................................. 19

Startup Output ............................................................................................................................................................................... 19

Adjusting procedure ...................................................................................................................................................................... 19

Adjusting the combustion head ..................................................................................................................................................... 20

Adjustements for single-stage burners ......................................................................................................................................... 20

Double-stage burners ................................................................................................................................................................... 21

Calibration of air and gas pressure switches ................................................................................................................................ 23

Calibration of air pressure switch (only for single stage burners) ................................................................................................. 23

Calibration of air pressure switch (double-stage, progressive and fully-modulating) .................................................................... 23

Calibration of low gas pressure switch .......................................................................................................................................... 23

Adjusting the high gas pressure switch (when provided) .............................................................................................................. 23

PART II: OPERATION ............................................................................................................................................. 24

OPERATION ................................................................................................................................................................................. 24

PART III: MAINTENANCE ....................................................................................................................................... 25

ROUTINE MAINTENANCE........................................................................................................................................................... 25

Removing the filter in the MULTIBLOC DUNGS MB-DLE 405..412 ............................................................................................ 25

Removing the combustion head ................................................................................................................................................... 26

Correct electrodes positioning ...................................................................................................................................................... 27

Checking the detection current ..................................................................................................................................................... 27

Seasonal stop ............................................................................................................................................................................... 27

TROUBLESHOOTING .................................................................................................................................................................. 28

SPARE PARTS ........................................................................................................................................................................... 29

BURNER EXPLODED VIEW ........................................................................................................................................................ 30

WIRING DIAGRAMS .................................................................................................................................................................... 32

APPENDIX

WARNINGS

THIS MANUAL IS SUPPLIED AS AN INTEGRAL AND ESSENTIAL PART OF THE PRODUCT AND MUST BE DELIVERED TO THE USER.

INFORMATION INCLUDED IN THIS SECTION ARE DEDICATED BOTH TO THE USER AND TO PERSONNEL FOLLOWING PRODUCT INSTALLATION AND MAINTENANCE.

THE USER WILL FIND FURTHER INFORMATION ABOUT OPERATING AND USE RESTRICTIONS, IN THE SECOND SECTION OF THIS MANUAL. WE HIGHLY RECOMMEND TO READ IT.

CAREFULLY KEEP THIS MANUAL FOR FUTURE REFERENCE.

1) GENERAL INTRODUCTION

z The equipment must be installed in compliance with the regulations

in force, following the manufacturer’s instructions, by qualified personnel.

z Qualified personnel means those having technical knowledge in the

field of components for civil or industrial heating systems, sanitary hot water generation and particularly service centres authorised by the manufacturer.

z Improper installation may cause injury to people and animals, or

damage to property, for which the manufacturer cannot be held liable.

z Remove all packaging material and inspect the equipment for inte-

grity. In case of any doubt, do not use the unit - contact the supplier. The packaging materials (wooden crate, nails, fastening devices, plastic

bags, foamed polystyrene, etc), should not be left within the reach of children, as they may prove harmful.

z Before any cleaning or servicing operation, disconnect the unit from

the mains by turning the master switch OFF, and/or through the cut-

out devices that are provided.

z Make sure that inlet or exhaust grilles are unobstructed. z In case of breakdown and/or defective unit operation, disconnect the

unit. Make no attempt to repair the unit or take any direct action. Contact qualified personnel only. Units shall be repaired exclusively by a servicing centre, duly authorised

by the manufacturer, with original spare parts. Failure to comply with the above instructions is likely to impair the unit’s safety. To ensure equipment efficiency and proper operation, it is essential that maintenance operations are performed by qualified personnel at regular

intervals, following the manufacturer’s instructions. z When a decision is made to discontinue the use of the equipment,

those parts likely to constitute sources of danger shall be made har-

mless. z In case the equipment is to be sold or transferred to another user, or

in case the original user should move and leave the unit behind,

make sure that these instructions accompany the equipment at all

times so that they can be consulted by the new owner and/or the

installer. z For all the units that have been modified or have options fitted then

original accessory equipment only shall be used. z This unit shall be employed exclusively for the use for which it is

meant. Any other use shall be considered as improper and, there-

fore, dangerous. The manufacturer shall not be held liable, by agreement or otherwise, for damages resulting from improper installation, use and failure to comply

with the instructions supplied by the manufacturer.

2) SPECIAL INSTRUCTIONS FOR BURNERS

z The burner should be installed in a suitable room, with ventilation

openings complying with the requirements of the regulations in force,

and sufficient for good combustion. z Only burners designed according to the regulations in force should

be used. z This burner should be employed exclusively for the use for which it

was designed. z Before connecting the burner, make sure that the unit rating is the

same as delivery mains (electricity, gas oil, or other fuel). z Observe caution with hot burner components. These are, usually,

near to the flame and the fuel pre-heating system, they become hot

during the unit operation and will remain hot for some time after the

burner has stopped. When the decision is made to discontinue the use of the burner, the user

shall have qualified personnel carry out the following operations: a Remove the power supply by disconnecting the power cord from the

mains.

b) Disconnect the fuel supply by means of the hand-operated shut-off

valve and remove the control handwheels from their spindles.

Special warnings

z Make sure that the burner has, on installation, been firmly secured to

the appliance, so that the flame is generated inside the appliance firebox.

z Before the burner is started and, thereafter, at least once a year,

have qualified personnel perform the following operations:

a set the burner fuel flow rate depending on the heat input of the

appliance;

b set the flow rate of the combustion-supporting air to obtain a combu-

stion efficiency level at least equal to the lower level required by the regulations in force;

c check the unit operation for proper combustion, to avoid any harmful

or polluting unburnt gases in excess of the limits permitted by the

regulations in force; d make sure that control and safety devices are operating properly; e make sure that exhaust ducts intended to discharge the products of

combustion are operating properly; f on completion of setting and adjustment operations, make sure that

all mechanical locking devices of controls have been duly tightened; g make sure that a copy of the burner use and maintenance instruc-

tions is available in the boiler room. z In case of a burner shut-down, reser the control box by means of the

RESET pushbutton. If a second shut-down takes place, call the

Technical Service, without trying to RESET further. z The unit shall be operated and serviced by qualified personnel only,

in compliance with the regulations in force.

3) GENERAL INSTRUCTIONS DEPENDING ON FUEL USED

3a) ELECTRICAL CONNECTION

z For safety reasons the unit must be efficiently earthed and installed

as required by current safety regulations. z It is vital that all saftey requirements are met. In case of any doubt,

ask for an accurate inspection of electrics by qualified personnel,

since the manufacturer cannot be held liable for damages that may

be caused by failure to correctly earth the equipment. z Qualified personnel must inspect the system to make sure that it is

adequate to take the maximum power used by the equipment shown

on the equipment rating plate. In particular, make sure that the

system cable cross section is adequate for the power absorbed by

the unit. z No adaptors, multiple outlet sockets and/or extension cables are per-

mitted to connect the unit to the electric mains. z An omnipolar switch shall be provided for connection to mains, as

required by the current safety regulations. z The use of any power-operated component implies observance of a

few basic rules, for example:

- do not touch the unit with wet or damp parts of the body and/or with

bare feet;

- do not pull electric cables;

- do not leave the equipment exposed to weather (rain, sun, etc.)

unless expressly required to do so;

- do not allow children or inexperienced persons to use equipment;

z The unit input cable shall not be replaced by the user. In case of damage to the cable, switch off the unit and contact qualified personnel to replace. When the unit is out of use for some time the electric switch supplying all the power-driven components in the system (i.e. pumps, burner, etc.) should be switched off.

3b) FIRING WITH GAS, LIGHT OIL OR OTHER FUELS

GENERAL

z The burner shall be installed by qualified personnel and in com-

pliance with regulations and provisions in force; wrong installation can cause injuries to people and animals, or damage to property, for which the manufacturer cannot be held liable.

z Before installation, it is recommended that all the fuel supply system

pipes be carefully cleaned inside, to remove foreign matter that might impair the burner operation.

z Before the burner is commissioned, qualified personnel should ins-

pect the following: a the fuel supply system, for proper sealing; b the fuel flow rate, to make sure that it has been set based on the

firing rate required of the burner; c the burner firing system, to make sure that it is supplied for the desi-

gned fuel type; d the fuel supply pressure, to make sure that it is included in the range

shown on the rating plate; e the fuel supply system, to make sure that the system dimensions are

adequate to the burner firing rate, and that the system is equipped

with all the safety and control devices required by the regulations in

force. z When the burner is to remain idle for some time, the fuel supply tap

or taps should be closed.

SPECIAL INSTRUCTIONS FOR USING GAS

Have qualified personnel inspect the installation to ensure that: a the gas delivery line and train are in compliance with the regulations

and provisions in force; b all gas connections are tight; c the boiler room ventilation openings are such that they ensure the air

supply flow required by the current regulations, and in any case are

sufficient for proper combustion.

z Do not use gas pipes to earth electrical equipment. z Never leave the burner connected when not in use. Always shut the

gas valve off. z In case of prolonged absence of the user, the main gas delivery

valve to the burner should be shut off.

Precautions if you can smell gas

a do not operate electric switches, the telephone, or any other item

likely to generate sparks; b immediately open doors and windows to create an air flow to purge

the room; c close the gas valves; d contact qualified personnel. z Do not obstruct the ventilation openings of the room where gas

appliances are installed, to avoid dangerous conditions such as the

development of toxic or explosive mixtures.

DIRECTIVES AND STANDARDS

Gas burners

European directives:

- Directive 90/396/CEE - Gas Appliances;

- Directive 2006/95/EC on low voltage;

- Directive 2004/108/CEE on electromagnetic compatibility

Harmonised standards :

-UNI EN 676 (Gas Burners;

-CEI EN 60335-1(Household and similar electrical appliances - Safety. Part 1: General requirements;

- EN 50165 (Electrical equipment of non-electric appliances for household and similar purposes. Safety requirements.

Light oil burners

European directives:

- Directive 2006/95/EC on low voltage;

Directive 2004/108/CEE on electromagnetic compatibility

Harmonised standards :

-CEI EN 60335-1(Household and similar electrical appliances - Safety. Part 1: General requirements;

- EN 50165 (Electrical equipment of non-electric appliances for household and similar purposes. Safety requirements.

National standards :

-UNI 7824: Monobloc nebulizer burners for liquid fuels. Characteristics and test methods

Heavy oil burners

European directives:

- Directive 2006/95/EC on low voltage;

- Directive 2004/108/CEE on electromagnetic compatibility

Harmonised standards :

-CEI EN 60335-1 Household and similar electrical appliances - SafetyPart 1: General requirements;

- EN 50165 Electrical equipment of non-electric appliances for household and similar purposes. Safety requirements.

National standards :

-UNI 7824: Monobloc nebulizer burners for liquid fuels. Characteristics and test methods

Gas - Light oil burners

European directives:

- Directive 90/396/CEE Gas Appliances;

- Directive 2006/95/EC on low voltage;

- Directive 2004/108/CEE on electromagnetic compatibility

Harmonised standards :

-UNI EN 676 Gas Burners

-CEI EN 60335-1(Household and similar electrical appliances - Safety. Part 1: General requirements;

- EN 50165 Electrical equipment of non-electric appliances for household and similar purposes. Safety requirements.

National standards :

-UNI 7824: Monobloc nebulizer burners for liquid fuels. Characteristics and test methods

Gas - Heavy oil burners

European directives:

- Directive 90/396/CEE - Gas Appliances;

- Directive 2006/95/EC on low voltage;

- Directive 2004/108/CEE on electromagnetic compatibility

Harmonised standards :

-UNI EN 676 (Gas Burners;

-CEI EN 60335-1(Household and similar electrical appliances - Safety. Part 1: General requirements;

- EN 50165 Electrical equipment of non-electric appliances for household and similar purposes. Safety requirements.

National standards :

-UNI 7824: Monobloc nebulizer burners for liquid fuels. Characteristics and test methods

C.I.B. UNIGAS - M039135CG

PART I - INSTALLATION

Burner model identification

Burners are identified by burner type and model. Burner model identification is described as follows.

Type NG90 Model M-. AB. S. .* A. 0. 15

(1) (2) (3) (4) (5) (6) (7) (8)

NG - Natural gas burner

(1) BURNER TYPE

(2) FUEL M - Natural gas L - LPG (3) OPERATION

(4) BLAST TUBE S - standard L - extended

(5) DESTINATION COUNTRY * - see data plate

(6) BURNER VERSION A - Standard

(7) EQUIPMENT

(8) GAS CONNECTION

LG - L.P.G. burner NGX - Natural gas Low NOx burners

TN - Single stage AB - Double stage

0 = 2 gas valves 1= 2 Gas valves + gas proving system (option) 10= 3/8” = Rp1/2 15= 1/2” = Rp1/2 20= 3/4” = Rp3/4

Specifications

BURNERS

Output min. - max. kW

Fuel

Category (see next paragraph)

Gas rate

Gas pressure min.-max. mbar (see Note 2)

Power supply

Total power consumption kW

Electric motor kW

Protection

Approx. weight kg

Valves size / Gas connection

Operation

Operating temperature °C

Storage Temperature °C

Working service*

BURNERS

Output min. - max. kW

Fuel

Category (see next paragraph)

Gas rate

Gas pressure min.-max. mbar (see Note 2)

Power supply

Total power consumption kW

Electric motor kW

Protection

Approx. weight kg

Valves size / Gas connection

Operation

Operating temperature °C

Storage Temperature °C

Working service*

min.-max. (Stm

/h)

NG70

M-.TN...10

3.2 - 7.4 4.2 - 9

3/8 / ”Rp1/2 1/2” / Rp1/2 3/8” / Rp1/2 1/2” / Rp1/2 3/4” / Rp3/4

NG70

M-.AB...10

3/8” / Rp1/2 1/2” / Rp1/2 1/2” / Rp1/2 1/2” / Rp1/2 3/4” / Rp3/4

NG70

M-.TN...15

30 - 70 40 - 85

NG70

M-.AB...15

19 - 68 22 - 85

2 - 7 2.3 - 9

NG90

M-.TN...10

Natural gas

230V 1N.ac - 50 Hz

0.40

0.10

IP40

Single stage

-10 ÷ +50

-20 ÷ +60

Intermittent

NG90

M-.AB...10

Natural gas

230V 1N.ac - 50 Hz

0.40

0.10

IP40

High-low flame

-10 ÷ +50

-20 ÷ +60

Intermittent

NG90

M-.TN...15

NG90

M-.AB...15

NG90

M-.TN...20

NG90

M-.AB...20

C.I.B. UNIGAS - M039135CG

BURNERS LG70 L-.TN...10 LG70 L-.TN...15 LG90 L-.TN...10 LG90 L-.TN...15

Output min. - max. kW

Fuel

CATEGORY

2E( R ) B

2ELL

2Er

AT ES GR SE FI IE HU IS NO CZ DK GB IT PT CY EE LV SI MT SK BG LT RO TR CH

LUPL-----------------------

BE------------------------

NL------------------------

DE------------------------

FR------------------------

COUNTRY

OVERALL DIMENSIONS (mm) (NG70 - NG90)

C.I.B. UNIGAS - M039135CG

Rp A B C D E F G H J K L M N O P Q R S Tmin. W X Y

NG70 ..S.. NG70 ..L.. NG90 ..S.. NG90 ..L..

1/2" 365 34 78 287 332 365 75 291 Ø80 Ø95 99 162 218 M8 155 86 138 110 285 330 118 163 168 14 438 299 Ø78,5 1/2" 443 34 156 287 410 365 75 291 Ø80 Ø95 99 162 218 M8 155 86 138 110 285 408 118 241 168 14 438 299 Ø78,5 1/2" 365 34 70 295 331 365 75 291 Ø80 Ø95 102 162 218 M8 155 86 138 110 293 329 125 203 168 2 441 299 Ø78,5 1/2" 443 34 148 295 409 365 75 291 Ø80 Ø95 102 162 218 M8 155 86 138 110 293 407 125 239 168 2 441 299 Ø78,5

S: standard blast tube L: extended blast tube

Burner flange and boiler drilling template

min. max. min. max. min. max. min. max. min. max.

NGX70

C.I.B. UNIGAS - M039135CG

Burner flange and boiler drilling template

Blast tube

Standard

Extended

AB CDEFGHJKLMNOPQ RSTWX

min. max. min. max. min. max. min. max. min. max.

NGX70 393 76 299 304 14 291 Ø80 Ø98 99 145 218 M8 153 96 120 108 296 130 167 7 438 291

NGX70 461 66 149 294 377 304 14 291 Ø80 Ø98 99 145 218 M8 153 96 120 108 292 375 125 208 167 2 438 291

Performance curves

L.P.G. Burners

NG70 M-.TN...

2,5

1,5

0,5

-0,5

-1

BACKPRESSURE IN

20 30 40 50 60 70 80

COMBUSTION CHAMBER mbar

C.I.B. UNIGAS - M039135CG

NG70 M-.AB...

2,5

1,5

0,5

-0,5

-1 10 20 30 40 50 60 70 80

NG90 M-.TN...

2,5

1,5

0,5

-0,5

-1

BACK PRESSURE IN

30 40 50 60 70 80 90 100

COMBUSTION CHAMBER mbar

L.P.G. Burners

LG70 L-.TN...

2,5

1,5

0,5

-0,5

-1

BACK PRESSURE IN

20 30 40 50 60 70 80

COMBUSTION CHAMBER mbar

NG90 M-.AB...

2,5

1,5

0,5

-0,5

-1 10 20 30 40 50 60 70 80 90

LG70 L-.AB...

2,5

1,5

0,5

-1 10 20 30 40 50 60 70 80

LG90 L-.TN...

2,5

1,5

0,5

-0,5

-1

BACK PRESSURE IN

30 40 50 60 70 80 90 100

CCOMBUSTION CHAMBER mbar

LG90 L-.AB...

2,5

1,5

0,5

-0,5

-1 10 20 30 40 50 60 70 80 90

C.I.B. UNIGAS - M039135CG

Low NOx burners

NGX70 M-.TN...

2,5

1,5

0,5

-0,5

-1

BACK PRESSURE IN

35 45 55 65 75

COMBUSTION CHAMBER mbar

NGX70 M-.AB...

2,5

1,5

0,5

-0,5

-1 10 20 30 40 50 60 70 80

To get the input in kcal/h, multiply value in kW by 860. Data are referred to standard conditions: atmospheric pressure at 1013mbar, ambient temperature at 15°C.

Pressure in the network / gas flow rate curves

L.P.G. Burners

NG70 M-.TN...

GAS PRESSURE mbar

2345 6789

NG90 M-.TN...

40 35

15 10

GAS PRESSURE mbar

45678910

L.P.G. Burners

LG70 L-.TN...

GAS PRESSURE mbar

11,5 22,53

Rp ½" (10)

Rp ½" (15)

Gas rate Stm3/h

Rp ½" (10)

Rp ½" (15)

Rp ¾" (20)

Gas rate Stm3/h

Rp ½" (10)

Rp ½" (15)

Gas rate Stm3/h

NG70 M-.AB...

1234 56 78

Rp ½" (10)

NG90 M-.AB...

45 40

Rp ½" (10)

35 30

25 20

15 10

5 0

234567 8910

LG70 L-.AB...

0,5 1 1,5 2 2,5 3

Rp ½" (10)

Rp ½" (15)

Gas rate Stm3/h

Rp ½" (15)

Rp ¾" (20)

Gas rate Stm3/h

Rp ½" (15)

Gas rate Stm3/h

C.I.B. UNIGAS - M039135CG

)

LG90 L-.TN...

GAS PRESSURE mbar

1 1,5 2 2,5 3 3,5 4

Low NOx burners

NGX70 M-.TN...

26 24 22 20 18 16 14 12 10

GAS PRESSURE mbar

45678

Rp ½" (10)

Rp ½" (15

Rp ½" (15)

Gas rate Stm3/h

Rp ¾" (20

Gas rate Stm3/h

LG90 L-.AB...

Rp ½" (10)

Rp ½" (15)

Gas rate Stm3/h

NGX70 M-.AB...

26 24 22 20 18 16 14 12 10

8 6 4 2 0

23456 78

Rp ½" (15)

Rp ¾" (20)

Gas rate Stm3/h

C.I.B. UNIGAS - M039135CG

MOUNTINGS AND CONNECTIONS

Packing

.The burners are despatched in cardboard packages whose dimensions are: 400mm x 300mm x 520mm (L x P x H) Packing cases of this type are affected by humidity; the maximum number of cases to be stacked is indicated outside the packing. The following are placed in each packing case. 1 Burner with gas train; 1 gasket to be inserted between the burner and the boiler; 1 envelope containing this manual

When disposing of the burner packing and if the packing is scrapped follow the procedures laid down in the current legislation regarding the disposal of materials.

Fitting the burner to the boiler

To install the burner into the boiler, proceed as follows: 1 on the boiler’s door hole, fix the 4 stud bolts according to the drilling template showed on paragraph “Overall dimensions” 2 fix the flange of the burner to the boiler; 3 install the burner into the boiler; 4 according to the reference showed on Fig. 2, fix the flange to the boiler’s stud bolts D, without completely fastening; 5 loosen the VS screws in order to let the blast tube move back and forth; 6 install the burner making the blast tube move into the flange as to reach the right position according to the boiler/utilisation 7 fasten the VS screws: 8 tighten the 4 stud blolts D completely; 9 seal the space between the blast tube and the refractory lining with appropriate insulating material (ceramic fibre cord or refractory

cement).

VS D

Fig. 1 Fig. 2

Matching the burner to the boiler

The burners described in this manual have been tested with combustion chambers that comply with EN676 regulation and whose dimensions are described in the diagram . In case the burner must be coupled with boilers with a combustion chamber smaller in diameter or shorter than those described in the diagram, please contact the supplier, to verify that a correct matching is possible, with respect of the application involved. To correctly match the burner to the boiler verify the necessary input and the pressure in combustion chamber are included in the burner performance curve; otherwise the choice of the burner must be revised consulting the burner manufacturer. To choose the blast tube lenght follow the instructions of the boiler manufacturer. In absence of these consider the following:

z Cast-iron boilers, three pass flue boilers (with the first pass in the rear part): the blast tube must protrude no more than 100 mm into

the combustion chamber.

z Pressurised boilers with flame reversal: in this case the blast tube must penetrate at least 50 - 100 mm into combustion chamber in

respect to the tube bundle plate.

The length of the blast tubes does not always allow this requirement to be met, and thus it may be necessary to use a suitably-

sized

C.I.B. UNIGAS - M039135CG

spacer to move the burner backwards or to design a blast tube tha suites the utilisation (please, contact the manifacturer).

Key

a) Heat output in kW b) Lenght of the flame tube in meters c) Flame tube firing intensity in MW/m

d) Combustion chamber diameter (m)

Fig. 3 - Firing intensity, diameter and lenght of the test flame tube as a function of the heat input in kW.

Fig. 3

Installing the gas train

ATTENTION: BEFORE EXECUTING THE CONNECTIONS TO THE GAS PIPE NETWORK, BE SURE THAT THE MANUAL CUTOFF VALVES ARE CLOSED. READ CAREFULLY THE “WARNINGS” CHAPTER AT THE BEGINNING OF THIS MANUAL.

The following diagram shows the gas train components which are included in the delivery and those which must be fitted by the customer. The diagram complies with regulations in force.

MANUFACTURER

INSTALLERINSTALLER

Keys

1 Burner 2 Multibloc valves group: Multibloc DUNGS (2 gas valves + gas pressure switch + filter + pressure governor) 3 Bellow joint 4 Manual cutoff valve

Once the train is installed, connect the gas valves group plug.

ATTENTION: once the gas train is mounted according to the diagram, the gas proving test mus be performed, according to the procedure set by the laws in force.

+ 30 hidden pages

Unigas NG70 M-.AB 15, NG70 M-.TN 10, NG90 M-.AB 10, NG90 M-.AB 15, NG70 M-.TN 15 Technical Manual Of Installation, Use And Maintenance

Specifications and Main Features

Frequently Asked Questions

User Manual