Master BG 50-390 Owner's manual

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OBSAH

VŠEOBECNÉ INFORMACE:

SORTIMENT 2

ZÁRUKA 2

OBSAH 3

VŠEOBECNÉ INFORMACE 4

ZÁKLADNÍ PRAVIDLA BEZPEČNOSTI 5

POPIS SPOTŘEBIČE 6

OVLÁDACÍ PANEL 7

IDENTIFIKACE 8

SCHÉMA ELEKTRICKÉHO ZAPOJENÍ 9

INSTALATÉR:

PŘIJETÍ PRODUKTU 10

ROZMĚRY 10

MANIPULACE A PŘEPRAVA 11

UMÍSTĚNÍ 11

MONTÁŽ VZDUCHOVÉHO TĚLESA 12

MONTÁŽ DVOJITÉHO TERMOSTATU 14

KALIBRACE DVOJITÉHO TERMOSTATU 15

REGULACE 16

PEVNÉ BEZPEČNOSTNÍ PRVKY 16

ELEKTRICKÉ ZAPOJENÍ 16

SVOD PRODUKTŮ VZNIKAJÍCÍCH PŘI SPALOVÁNÍ 18

INSTALACE HOŘÁKU 19

NASTAVENÍ 19

SERVIS TECHNICKÉ PODPORY:

PŘÍPRAVA NA PRVNÍ UVEDENÍ DO PROVOZU 21

PRVNÍ UVEDENÍ DO PROVOZU 22

OVLÁDÁNÍ 24

CONTROLA 24

ÚDRŽBA 25

PŘÍPADNÉ PORUCHY A JEJICH NÁPRAVA 27

PROSTOR PRO PŘÍPADNÉ POZNÁMKY 30

V některých částech příručky je užita následující

symbolika:

POZOR: Operace, které vyžadují zvláštní

opatrnost a odpovídající přípravu.

ZAKÁZÁNO: Operace, které SE NESMÍ provádět.

Tato příručka obsahuje 32 stran.

3

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02/10_Rev.0 Cod. 745-MN

DESA ITALIA s.p.a.

Via Tione, 12 – 37010

Pastrengo (Verona) – Italy

www.desaitalia.com

info@desaitalia.com

DESA POLAND Sp. Z.o.o

ul Magazynova 5A, 62-023

Gadki, Poland

www.desapoland.pl

office@desapoland.pl

DESA HEATING EQUIPMENT

SHANGHAI CO., LTD

Rm. 2203, 218, HengFeng Rd,

Shanghai, China, 200070

www.desa-china.com

info@desa-china.com

2

TECHNISCHE HINWEISE,

ANLEITUNGEN FÜR MONTAGE,

BETRIEB UND WARTUNG

Warmlufterzeuger mit direkter Luftverteilung mit

Ölgebläsebrenner

SERIE BG

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_______________________________________________________________________________________

02/10_Rev.0 Cod. 745-MN

DESA ITALIA s.p.a.

Via Tione, 12 – 37010

Pastrengo (Verona) – Italy

www.desaitalia.com

info@desaitalia.com

DESA POLAND Sp. Z.o.o

ul Magazynova 5A, 62-023

Gadki, Poland

www.desapoland.pl

office@desapoland.pl

DESA HEATING EQUIPMENT

SHANGHAI CO., LTD

Rm. 2203, 218, HengFeng Rd,

Shanghai, China, 200070

www.desa-china.com

info@desa-china.com

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ÍNDICE

INFORMACIONES GENERALES:

GAMA 2

GARANTÍA 2

ÍNDICE 3

ADVERTENCIAS GENERALES

4

REGLAS FUNDAMENTALES DE SEGURIDAD 5

DESCRIPCIÓN DEL APARATO 6

TABLERO DE MANDO 7

IDENTIFICACIÓN 8

ESQUEMA ELÉCTRICO 9

INSTALADOR:

RECEPCIÓN DEL PRODUCTO 10

DIMENSIONES 10

DESPLAZAMIENTO Y TRANSPORTE 11

UBICACIÓN 11

MONTAJE PLENUM DE DESCARGA 12

MONTAJE DEL BITERMÓSTATO 14

CALIBRADO DEL BITERMÓSTATO 15

CANALIZACIÓN 16

PROTECCIONES FIJAS 16

CONEXIÓN ELÉCTRICA 16

DESCARGA PRODUCTOS DE LA COMBUSTIÓN 18

INSTALACIÓN DEL QUEMADOR 19

AJUSTES 19

SERVICIO DE ASISTENCIA TÉCNICA:

PREPARACIÓN PARA LA PRIMERA PUESTA EN SERVICIO 21

PRIMERA PUESTA EN SERVICIO 22

MANDOS 24

CONTROLES 24

MANTENIMIENTO 25

EVENTUALES ANOMALIAS Y REMEDIOS 27

ESPACIO PARA EVENTUALES NOTAS 30

En algunas partes del manual se utilizan los siguientes

símbolos:

ATENCIÓN: Para acciones que requieren especial cuidado y

adecuada preparación.

PROHIBIDO: Para acciones que NO DEBEN ser ejecutadas

absolutamente.

El presente manual está compuesto por 32 hojas.

29

3

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02/10_Rev.0 Cod. 745-MN

DESA ITALIA s.p.a.

Via Tione, 12 – 37010

Pastrengo (Verona) – Italy

www.desaitalia.com

info@desaitalia.com

DESA POLAND Sp. Z.o.o

ul Magazynova 5A, 62-023

Gadki, Poland

www.desapoland.pl

office@desapoland.pl

DESA HEATING EQUIPMENT

SHANGHAI CO., LTD

Rm. 2203, 218, HengFeng Rd,

Shanghai, China, 200070

www.desa-china.com

info@desa-china.com

Page is loading ...

7

02/10_Rev.0 Cod. 745-MN

DESA ITALIA s.p.a.

Via Tione, 12 – 37010

Pastrengo (Verona) – Italy

www.desaitalia.com

info@desaitalia.com

DESA POLAND Sp. Z.o.o

ul Magazynova 5A, 62-023

Gadki, Poland

www.desapoland.pl

office@desapoland.pl

DESA HEATING EQUIPMENT

SHANGHAI CO., LTD

Rm. 2203, 218, HengFeng Rd,

Shanghai, China, 200070

www.desa-china.com

info@desa-china.com

2

TECHNICAL INFORMATION,

INSTALLATION

AND OPERATING INSTRUCTIONS

Cabinet Warm Air Heater

for oil burner

BG SERIES

2

Dear Customer,

We thank your for having chosen a BG series WARM AIR HEATER: an innovative product, both modern and

of high quality, that will ensure you comfort, tranquillity and safety for many years. This in particular if the

heater is entrusted to a DESA Italia

After-Sales-Service unit, which, with its specifically trained personnel,

can maintain the heater at its highest level of efficiency, with low operation costs, and which has original

spare parts available, if necessary.

This instruction manual contains important indications and suggestions that must be followed to allow an

easy installation and an optimum use of the BG series WARM AIR HEATER

.

Thank you again

DESA Italia s.p.a.

RANGE

In this Manual we refer to the TYPE. The following table shows the range and the correspondence between Type and

Commercial Name.

TYPE MODEL

1 BG 50

2 BG 70

3 BG 90

4 BG 110

5 BG 190

6 BG 260

7 BG 390

GUARANTEE

BG series WARM AIR HEATERS are covered by a SPECIFIC GUARANTEE that starts on the date of purchase of the

device, which date the buyer should document; if he cannot do this, the guarantee starts on the date of manufacture of

the device.

The guarantee conditions are specified in detail in the GUARANTEE CERTIFICATE, supplied with the device, and we

suggest you read them carefully.

2

INDEX

GENERAL INFORMATION:

RANGE 2

GUARANTEE 2

INDEX 3

GENERAL NOTES 4

FUNDAMENTAL SAFETY RULES 5

DESCRIPTION OF THE HEATER 6

CONTROL PANEL 7

IDENTIFICATION 8

WIRING DIAGRAM 9

FITTER:

RECEIPT OF THE PRODUCT 10

DIMENSIONS 10

HANDLING AND TRANSPORT 11

POSITIONING 11

MOUNTING THE DISTRIBUTION PLENUM 12

FITTING THE DOUBLE THERMOSTAT 14

SETTING THE DOUBLE THERMOSTAT 15

DUCTING 16

FIXED PROTECTIONS 16

ELECTRIC CONNECTION 16

DISCHARGE OF COMBUSTION PRODUCTS 18

INSTALLATION OF THE BURNER 19

ADJUSTMENTS 19

AFTER SALE SERVICE:

FIRST START-UP PREPARATION 21

FIRST START-UP 22

CONTROLS 24

CHECKS 24

MAINTENANCE 25

TROUBLE SHOOTING 27

NOTES 30

In some parts of the Manual, we use the following symbols:

ATTENTION: For actions that require special care and adequate

Preparation.

FORBIDDEN: For actions that absolutely MUST NOT be taken.

3

GENERAL NOTES

This Instruction Manual is an integral part of the device and as such must always be kept with the device. This is also

the case when the heater is sold to another user. The Manual must therefore be conserved and consulted carefully

before any action. In the case of damage or loss, you can at any time ask the local After Sales Service for a copy of the

Manual.

After removing the packaging, first make sure that the contents are complete and undamaged. If the heater does not

match with the Manual in any way, contact the Agency that sold the heater.

Installation of the BG series WARM AIR HEATER must be carried out by qualified companies under Law 5 March 1990

n°46. On completion of the job, they provide the owner with a declaration of conformity of the correctly carried out

installation, that is according to the current applicable Norms requires and according to the indications provided by the

Manufacturer in this Instruction Manual.

The heaters have been manufactured for room heating and they must be used for this purpose, compatibly with their

performance characteristics. The Manufacturer accepts no contractual or extracontractual responsibility for damage

caused to people, animals or property, due to errors in installation, adjustment and maintenance or to improper use.

Excessive temperature represents a risk for health and a waste of energy. Avoid leaving rooms closed for long periods of

time. Open the windows periodically to ensure an adequate air change.

During the first start-up, there may be smells and smoke due to evaporation of the liquid used to protect the heat

exchanger during storage; this is a normal phenomenon that will disappear after a brief operation time. The rooms must

be adequately aerated.

On leaving the heater unused for a long period, you should carry out at least the following operations:

• Turn off the main heater switch and the main plant switch.

• Close the main fuel supply valve.

If the heater is not used for a long period of time, we suggest you contact the After Sales Service or other professionally

qualified personnel for restarting.

All heaters must be fitted exclusively with original accessories. The Manufacturer is not responsible for any damage

caused by improper use of the heater and by the use of accessories that are not original.

All references to Law, standards, directives and technical rules in this manual are to be considered as informative only

and valid at the date of printing of the Manual. The enforcing of new dispositions or the alteration of current ones do not

create any Manufacturer obligations towards third parties.

Repairs and maintenance must be carried out by the After Sales Service or by qualified personnel as specified in this

Manual. Do not alter or tamper with the heater: this can create dangerous situations and the Manufacturer will not be

responsible for any damage.

The systems that must be installed (oil pipes, electrical supplies, etc.) have to be suitably fastened and must not

represent any obstacle that could cause tripping.

The Manufacturer is responsible for conformity of his product to laws, directives and instructions standards current at

the date of sale. Knowledge and observation of legislative instruments and of standards for the design of systems, and

for installation, operation and maintenance are the exclusive responsibility of respectively the designer, the installation

personnel and the user.

The Manufacturer is not responsible for failure to observe the instructions in this Manual, for the consequences of any

operation carried out that is not specifically foreseen, or for any translations causing erroneous interpretations.

The heater is designed for operation at the thermal power and the airflow rate as specified in the Technical Data

Chapter. A thermal power that is too low and/or an airflow that is too high can lead to condensation in the flue, with

consequent irreparable corrosion to the heat exchanger. A thermal power that is too high and/or an airflow that is too

low cause abnormal overheating of the heat exchanger with consequent actuation of the safety systems and damage to

the heat exchanger.

4

FUNDAMENTAL SAFETY RULES

The use of devices that employ electrical energy and/or fuel oil requires the observance of some fundamental safety

rules such as:

Children ad unassisted disabled persons must not use the warm air heaters.

Do not operate electrical equipment such as switches, electric household equipment etc if you can smell fuel or other

combustibles. In this case:

• Open the doors and windows to aerate the room.

• Close the fuel supply valves.

• Call in quickly the After Sales Service or other professionally qualified personnel.

Do not touch the heater if you are barefoot or if parts of your body are wet.

Do not carry out any cleaning or maintenance operation without first deactivating the heater by setting the main system

switch to "OFF" and without first closing the fuel supply.

Do not alter the safety and adjustment systems without prior authorisation and indications by the heater Manufacturer.

Do not pull, detach or twist the electric cables that exit the heater, even if the heater is not connected to the electrical

supply.

Do not open any doors that access the inside of the heater without turning the main system switch to "OFF".

Do not abandon or leave available to children the heater packing materials (cartons, nails, plastic bags, etc.), as these

are a potential source of danger.

Do not install the heater near flammable material, or in areas where there is a corrosive atmosphere.

Do not place any object on the heater or push anything through the grilles in the casing nor in the flue ducts.

Do not touch the flue ducts as during normal operation these can reach high temperatures and represent a risk.

Do not use any adapters, multiple sockets and cable extensions for the electrical connection of the heater.

Do not install the heater in the open air nor where it could be subject to atmospheric events.

Do not install the heater directly in limited spaces without adequate ventilation, as the burner air suction can create a

pressure drop in the room and consequently cause serious problems.

5

5 5

4

3

6

7

10

9

8

15

11

12

13

14

2

1

2

16

2

DESCRIPTION OF THE HEATER

The warm air heater with fuel oil burner is a device that heats ambient air using thermal energy produced by

combustion.

An airflow produced by a centrifugal fan is in contact with the heat exchanger wall, so heat is exchanged with no

intermediate fluid. The combustion products, after losing heat, are expelled. This system allows considerable reduction

of installation and operating costs, and is particularly well suited to applications where use of the heater is intermittent

or occasional. During the summer, the heater can also provide ventilation only.

GENERAL CONSTRUCTION FEATURES

The most important parts of the heater are:

• Combustion chamber with flame inversion in stainless steel type AISI 430 resistant to high temperatures, with low

thermal loading, of appropriate shape and volume.

• Tube bundle with oval section fire tubes and turbulence imprints to offer maximum heat efficiency.

• Flue collector at the rear.

• Plenum for direct air diffusion with horizontal guide vanes, each separately adjustable, on four sides.

• Outer casing consisting of removable panels in painted steel sheet.

• Heat insulation, anti-radiation, for the surfaces exposed to radiation from the heat exchanger.

• Centrifugal fan, high performance, with double air intake and low sound emission level.

The electrical system comprises:

Double thermostat Fan-Limit adjusted and electrically connected to offer the following functions:

• Function “FAN” (25-35°C), controls the fan start up approximately 60 seconds after ignition of the burner,

and stops the fan at approximately four minutes after the burner stops. This avoids the emission of cold air on

start-up, and allows the accumulated heat in the heat exchanger to be removed, guaranteeing complete

recovery before stopping.

• Function “LIMIT” (100°C), with Manual reset, stops burner operation if the air is overheated.

• Three way switch to allow heating, ventilation only in summer, and plant stoppage.

Type 1÷4

1. Distribution plenum

2. Air delivery

3. Inspection doors

4. Burner plate

5. Air inlet

6. Flame inspection

7. Double thermostat FAN – LIMIT

8. Chimney connection

9. Combustion chamber

10. Electric centrifugal fan

11. Control panel

12. Casing

13. Front fluegas collector

14. Fire tubes

15. Rear fluegas collector

16. Adjustable vanes

6

Type 5÷7

1. Distribution plenum

2. Air delivery

3. Inspection doors

4. Burner plate

5. Air inlet

6. Flame inspection

7. Double thermostat FAN – LIMIT

8. Chimney connection

9. Combustion chamber

10. Electric centrifugal fan

11. Fan support plate

12. Transmission belt

13. Motor

14. Belt tightening

15. Control panel

16. Casing

17. Front fluegas collector

18. Fire tubes

19. Rear fluegas collector

20. Adjustable vanes

CONTROL PANEL

The control panel fitted to the heater allows all operations necessary for system running.

1. Function selector (HEATING / STOP / VENTILATION)

2. Steath gland

3. Cable gland

10

9

1211 1413

15

16

2

8

2

17

19 20 18

5

4

5

22

3

6

1 7

0

3

2

1

FAN - LIMIT

288-E

TA

0

7

IDENTIFICATION

The BG warm air heater can be identified by the Technical Plate that shows the main technical and performance data.

It if gets damaged or lost, you should ask for a copy to the Assistance Technical Service.

MANUFACTURER

IDENTIFICATION

WARM AIR HEATER

Model

Serial Nr

Country PIN Code

Category Code

Type Year

Nominal heat rating kW

Thermal power delivered kW

Air flow-rate (+20°C) m

3

/h

Electrical supply

Maximum electric power taken kW

Maximum current taken A

Electric protection grade

Fuel used: oil

TECHNICAL DATA

Type 1 2 3 4 5 6 7

Total heat rating kW 46,8 71,1 93,0 104,6 190,0 258,8 391,0

kcal/h

40.300 61.200 80.000 90.000 163.400 222.600 336.250

Heat delivered kW 42,2 64,4 83,9 94,2 168,2 230,3 347,6

kcal/h

36.300 55.400 72.100 81.090 144.600 198100 298.950

Efficiency % 90,1 90,5 90,1 90,1 88,5 89 88,9

Pressure of the Combustion

chamber

Pa 18 20 25 8 2 39 32

Combustion chamber

volume

dm

3

48,8 77,4 129,5 228,5 490,0 640,0 1050,0

Net smoke temperature °C 200 220 220 220 249 248 227

Consumption

- Oil

(4)

kg/h 3,95 6,00 7,84 8,82 16,0 21,8 32,9

Device type B23

Airflow +20°C

Nm

3

/

h

2.800 4.500 5.300 6.300 11.500 15.300 23.000

D

T

°K 43 41 45 45 43 45 45

Thermostat settings

°C 25-35-100

Operation temperature

°C -5/+40

Electrical supply

230V 50Hz ~ 400V 3N 50Hz ~

Engine rating kW 0,25 0,59 0,73 0,73 2,20 3,00 4,00

Maximum absorbed current

A 2,6 6,7 7,6 7,6 5,1 7,0 9,1

Electric protection degree IP 20

(1) Refers to conditions: 1013 mbar, 15°C, P.C.I. 8570 kcal/m3

(2) Refers to conditions: 1013 mbar, 15°C, P.C.I. 11070 kcal/kg – 5635 kcal/l

(3) Refers to conditions: 1013 mbar, 15°C, P.C.I. 10905 kcal/kg – 6285 kcal/l

(4) Refers to conditions: 1013 mbar, 15°C, P.C.I. 10200 kcal/kg

NOTE: On request, the heaters can be arranged differently to satisfy special efficiency requirements.

8

WIRING DIAGRAM

Type 1÷4

Type 5÷7

G Three-phase fan motor

RTV Fan motor thermal cut-out

LV Line contactor

CV Function switch HEAT / STOP / VENT

LX Burner thermal safety stop relay

MG Main terminal strip

LM LIMIT thermostat (100°C)

FA Double thermostat FAN (25/35°C)

BC Neutral bus

FL Line fuses

F Auxiliary fuses

*TA Room thermostat

*IMT Differential switch

* External to the heater, to be installed by the user.

ALIMENTAZIONE

ELETTRICA GENERALE

230V 50HZ 3N

IMT

N

FL

MG

L

LMFA

ALIMENTAZIONE

BRUCIATORE

230V 50HZ 3N

TA

1 2 3 4 5 6

G

S

R

V

CV

TA

S

R

V

LM

MG

1 2

ALIMENTAZIONE ELETTRICA

BRUCIATORE

TRIFASE 400V 50HZ 3N

R

LINEA TERMOSTATICA

FA

3 4 5 6 S T N

11

LX

ALIMENTAZIONE ELETTRICA

GENERALE

TRIFASE 400V 50HZ 3N

N

BC

12

FL

IMT

FL

L1

FL

L2

L3

FL F

CV

RTV

G

LV

MG

21

LM FA

3 4 T

ALIMENTAZIONE ELETTRICA

BRUCIATORE

MONOFASE 230V 50HZ

5 6 SR

TA

N

11 12

GENERAL

ELECTRIC SUPPLY

230V 50HZ

GENERAL

ELECTRIC SUPPLY

230V 50HZ

BURNER 1-PHASE

ELECTRIC SUPPLY

230V 50HZ

BURNER 3-PHASE

ELECTRIC SUPPLY

400V 50HZ 3N

GENERAL 3-PHASE

ELECTRIC SUPPLY

400V 50HZ 3N

9

Burner activation line

RECEIPT OF THE PRODUCT

The warm air heaters are supplied on wooden pallets

(bolted to the heater) and are protected by a carton

packaging

(

type 1÷4

)

or a bubblewrap (for type 5÷7

).

The following items complete the supply:

A plastic envelope (A) containing:

• Instruction manual for the plant owner, installation

personnel and for the After Sales Service.

• Guarantee certificate.

• Label with bar code.

Further and only for type 5÷7:

• Diffusion plenum (B) to be assembled and fastened to

the heater.

• Self threading fastening screws.

• Instruction sheet for fitting the air diffusion plenum.

The manual is an integral part of the heater and you

must therefore read it and keep it with care.

DIMENSIONS

Type 1÷4 Type 5÷7

Dimensions 1 2 3 4 5 6 7

A 460 540 680 760 900 1000 1200 mm

B 750 800 900 1.080 1300 1500 1700 mm

C 1372 1472 1657 1772 2120 2120 2350 mm

X 228 228 228 228 351 401 451 mm

V 673 723 823 1003 1230 1430 1628 mm

Z 425 505 645 725 830 930 1130 mm

Weight (1) 112 140 151 214 437 525 650 Kg

(1) Net weight without burner.

X

A

C

B

V

Z

A

C

X

B

V

Z

A

B

10

HANDLING AND TRANSPORT

Handling must be done by personnel with suitable equipment that has a lifting capacity adequate for the weight of the

heater.

If a forklift truck is used, widen the forks as far as possible. If a crane is used, hooking points are the eyes placed at the

top of the heat exchanger.

Type 1÷4 Type 5÷7

ATTENTION

Transport and handling must be done very carefully to avoid damage to the heater and danger to persons.

During transport and handling operations, do not stand near the heater.

If heaters are to be stacked, you must not stack more than one heater on another. Make sure the stacks created

are stable by carefully aligning the packages.

If a heater is to be moved by hand, make sure you have adequate personnel available with respect to the weight

of the heater, as shown in the paragraph “TECHNICAL DATA”, and according to the route to be followed.

Wear protective gloves at all times during these operations.

POSITIONING

The place of installation must be established by the plant designer or by a person competent in this field and must take

account of the technical requirements and of applicable Norms and Legislation, as usually specific authorisation are

needed (for example: urban planning, architectural rules, fire safety, environmental pollution, etc.).

The necessary authorisations should therefore be obtained before installing the heater.

For correct installation remember that the heaters must:

• Be positioned on a surface that is level, dry and able to carry the weight.

• Be positioned so that the distances allow correct airflow and allow normal operations of cleaning and

maintenance.

• Be at safe distances from flammable materials.

• Be near a chimney.

• Allow easy maintenance and control operations.

• Be placed in areas with ventilation openings according to applicable legislation.

Installation is NOT allowed:

• In places where the atmosphere is aggressive.

• In narrow spaces or where the heater sound emission could be amplified by reverberation or resonance.

•

In corners where there may be deposits of dust, leaves or other materials that could reduce the efficiency of

the heater by obstructing airways.

• Outdoor.

• In places with pressure drop conditions.

11

Installing examples

MOUNTING THE DISTRIBUTION PLENUM

The heater is supplied with a distribution plenum that is fitted with adjustable guide vanes. The vanes should be

adjusted so that they can ensure a good air distribution:

• Allow adequate air distribution.

• Do not create excess resistance to air flow.

•

Do not cause discomfort to people.

The vertical airflow guide vanes must be open. They must not be inclined more than 45° with

respect to the air flow direction. Air diffusion from one side only of the plenum is not allowed.

Safe distance

Guide vanes

orientation

In the middle of the

room – 4 sides outlet

On a wall

3 sides outlet

On a corner

2 sides outlet

1 SIDE OUTLET

NOT ALLOWED!

12

1

2

3

2

On models type 1÷4 the plenum is already fitted on the

heater.

For transport reasons and/or for stacking, on models type

5÷7 the distribution plenum is supplied with the heater

but completely dismantled.

For assembly and installation, proceed as follows:

• After positioning the heater at the area selected for

installation, remove the bubble wrap layer.

• Remove the supports (1).

• Dismantle the grille panel and take out from the

fan space the lateral distribution elements of the

plenum.

•

Refit the grille panel.

• Proceed to assemble the angular support panels

(2) using the self-threading screws supplied with

the heater.

•

Fasten the diffusion elements (3) using, again, the

self-threading screws provided.

• Position the assembled plenum on top of the warm

air heater, making sure that the hole for the double

thermostat, at the top of the plenum, is turned

towards the front of the heater (the face where the

burner carrier plate and the control panel are

located).

• Fasten the plenum to the heater using the

selfthreading screws provided.

13

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Master BG 50-390 Owner's manual

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