BENSON OUHA 100 Installation & Servicing Manual

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BENSON OUHA 100 Installation & Servicing Manual | Manualzz

Technical Support:

Tel: 01384 489200

Email: [email protected]

I

NSTALLATION

& S

ERVICING

M

ANUAL FOR

B

ENSON

OUH² O

IL

U

NIT

H

EATER

WARNINGS

Benson equipment must be installed and maintained in accordance with the current OFTEC

Regulations for oil fired products. Due account should also be taken of any obligations arising from the Health and Safety at Works Act 1974 or relevant codes of practice. In addition the installation must be carried out in accordance with the current IEE wiring regulations (BS 7671), BS 6896: Industrial & Commercial) and any other relevant British

Standards and Codes of Practice by a qualified installer. All external wiring MUST comply with the current IEE wiring regulations.

Contents

1 Compliance Notices …………………………………....………..…..………….

1.2 General Product Information …………………………………….………….

4

5

1.4 Delivery & Pre inspection …………………………………………….…. 6

2 Location & Positioning …………………….………………..…………..…………. 7

2.1 Fuel Supply - General …………..…..……………...………………………. 7

2.4

2.5

2.6

2.7

Single Pipe System (Gravity Fed) ….…………..………………...………. 9

Two Pipe System …………………….…………...…………………… 9

Pressurised Ring Main System ….…………..………………...………. 9

Pipework and Fittings …………………….…………...…………………… 9

2.10 Warm Air Circulation …………………………………...……...…………. 14

3 Installation …………………………………………………...…….…….………….

3.1 Mounting Heights ………………...……………………...…………….

16

16

3.2 Heater Mounting …………………………………………………..……...…. 16

3.3 Minimum Clearances ……………………………………...………………. 16

3.4 Flue Installation ……………………………..……..………….……...……. 16

3.5 Oil Installation & Connection ….……………..……………..……...………. 17

3.6 Electrical Installation & Connection ….……………………..……...………. 17

3.7 Heater Control Installation ……………………………….………………. 17

4 Commissioning ……………..…………………………...…………….…….……. 18

4.1 Pre test …………………………………………………...…..…..………. 18

4.2 Ignition ……………………………………………………….…..………. 18

4.3 Air Delivery System …………………………………....…...…..….……. 20

4.4 Hand Over …………………………………………………...….…...………. 20

5 Servicing …………………………………………………...…………..………….

5.1 Planned Servicing …………………………………....………..……….

21

21

5.2 Servicing procedure Major Components ….……………………...………. 21

5.3 Service Re commissioning ….…………………………………...………. 23

6 Fault Diagnosis By Flow Chart ………….………………...…….……...……. 24

7 Wiring Diagrams ……………………………………………………...……………. 27

8 Technical Data

8.1

…………………………………………………...………………. 35

Reference Documents Standards & Codes of Practice ...……...…… 36

9 Parts Listing …………………………………...………………..…………………….

10 Dimensional Drawings ………………………………….………...……………….

37

35

2

11.1

~ C O N T E N T S ~ 40

40

11.2 Servicing ……………………………….…………………………..…….… 40

11.3 S E C T I O N 1 40

11.4 Stop procedure ……………………………….……………………………. 40

11.5 Shutdown procedure ……………………………….……………...……...

1.0 Compliance Notices 4

1.1 Certificates of Conformity 5

40

40

40

1.2 General Product Information 5

1.3 General Requirements 5

1.5 Warranty 6

2 Turbulator positions …………….…………………………………………………. 23

2.0 Location & Positioning 7

2.1 Gas Supply 9

Any reference made to Laws, Standards, Directives, Codes of Practice or other

2.2 Electrical Supply 9

2.3 Air Supply 9

2.4 Minimum Space Requirements 12

2.5 Air Distribution System 12

3.0 Installation 16

3.2 Flooring 16

3.3 Minimum Clearances 16

3.5 Gas Installation and Connection 17

17

3.9 Heater Control Installation effective from early 2011, all oil fired air heater

17

18

4.0 Commissioning 18

4.1 Pre-Test 18

From April 2011 all our oil fired unit heaters

4.2 Ignition 19 will be fitted with Riello burners which are bio

4.3 Air Delivery System 21 fuel compatible for blends up to 10%.

4.4 Hand Over 21

Please note that the use of bio fuels may give rise

22

5.3 Servicing - Re-commissioning 25

6.0 Fault Diagnosis By Flow Charts 26

7.0 Wiring Diagrams by Model and Burner Type 28

8.0 Technical Data Net Efficiency Calculations 35

8.1 Benson Cabinet Range Data 36

9.0 Reference Documents Standards, Codes of Practice 39

9.1 Parts Listing 40

3

1.0 Compliance notices

manuals, supplied by the manufacturer, and that they are suitably aware of the purpose

The following information is relevant to the

Benson Oil Fired Unit Heater range (OUHA) of the manuals and the safety instructions.

In addition, operators must be suitably and (OUHC) manufactured by Benson trained in the use of the appliance so as to

Heating. These heaters are manufactured ensure its continued safe and efficient use. within a strictly controlled quality environment within the parameters of ISO

9001.

Benson Heating has a commitment to continuous improvement, and therefore

The Benson OUHA (C) has been tested and assessed for compliance with the following

European Directives. reserves the right to amend or change the specification of the Unit Heater range subject to compliance with the appropriate

European, National, and Local regulations.

Machinery Directive:

Low Voltage Directive:

(2006/42/EC)

(2006/95/EC)

Electromagnetic Compatibility Directive:

Contained within the text of the manual, the words 'Caution' and 'Warning' are used to highlight certain points.

(2004/108/EC)

Product Liability Directive: (85/374/EEC)

The manufacturer has taken reasonable and practical steps to ensure that Benson Unit

Heaters are safe and without risk when

Caution is used when failure to follow or implement the instruction (s) can lead to premature failure or damage to the heater or its component parts. properly used. These heaters should Warning is used when failure to heed or therefore only be used in the manner and purpose for which they were intended, and in accordance with the recommendations detailed herewith. implement the instruction (s) can lead to not only component damage, but also to a hazardous situation being created where there is a risk of personal injury.

The heaters have been designed, The Benson OUHA(C) Range conform to manufactured, assembled, inspected, and tested, with safety and quality in mind, there are certain basic precautions which the installer and user should be aware of, and the following harmonized standards:

BS EN 292-1

Safety of Machinery - Basic Concepts, they are strongly advised to read the appropriate sections of the information pack accompanying the heater, prior to

General Principles for Design Basic terminology, methodology installation or use.

Benson Heating supports all new products being supplied to their customers with a comprehensive information pack; this clearly defines mandatory instructions for the safe installation, use, and maintenance, of the appliance (s).

BS EN 292-2

Safety of Machinery - Basic Concepts,

General Principles for Design Technical

Principles and Specifications

BS EN 60204-1

Safety of Machinery - Electrical Equipment for Machines Specification for General

Where proprietary items are incorporated

Requirements into Benson Heating products, detailed BS EN 60335-1 information and instructions are also Safety of Household and Similar Electrical provided as part of the information pack. Appliances General Requirements

It is the responsibility of the installer, owner, user, or hirer, of such products supplied by

Benson Heating, to ensure that they are familiar with the appropriate information/

BS EN 55014

Limits and methods of measurement of radio disturbance characteristics of electrical motor-operated and thermal appliances for

4

household and similar purposes, electrical tools and similar electric apparatus

BS EN 50165 contrary to the manufacturers recommendations may constitute a hazard.

Note

Electrical Equipment of non-electric heating To ignore the warning and caution notices, appliances for household and similar and to ignore the advice from the purposes, safety requirements

1.1 Certificates of conformity

manufacturer on installation, commissioning, servicing, or use, will jeopardise any applicable warranty, moreover, such a situation could also compromise the safe

Certificates are available from the Quality

Control Department at Benson Heating. and efficient running of the appliance itself, and thereby constitute a hazard.

The installation of the appliance must meet

1.2 General product information

The Benson OUH unit heater models have all the relevant European, national, and local criteria. (See sections 3 and 9).

Prior to installation the following points should be considered; an output range from 30kW to 100kW. Each heater must be connected to its own individual open flue. a) The position of the heater for the optimum efficient distribution and circulation of warm air.

Each heater is fitted with a forced draught burner which has been test fired and pre-set prior to despatch. The safety functions of the burner are by way of a fully sequential b) The position of the heater relative to the route of the flue. c) The position of the heater relative to the control box fitted to the burner.

Note

Neither asbestos nor soft soldered joints are supply of fuel. d) The position of the heater relative to the electrical services, and if appropriate, any used in the construction or manufacture of the Benson range of Unit Heaters. The materials selected for use can withstand the mechanical, chemical, and thermal stresses which they will be subject to during foreseen normal use when installed in accordance with the manufacturers recommendations. additional controls. e) The position of the heater relative to the supply of fresh air. f) The position of the heater relative to service and maintenance requirements.

1.3 General requirements

Caution

Ensure that the fuel supply is in accordance with the manufacturer's recommendations and is as stated on the appliance data plate.

Caution

The heater must not be installed within an area where the conditions are unsuitable, e.g. where the atmosphere is highly corrosive, has a high degree of salinity, or where high wind velocities may affect burner operation. Suitable protection should be servicing must only be carried out by appropriately qualified and competent persons.

Warning

Unauthorised modifications to the appliance, or departure from the manufacturers guidance on intended use, or, installation in a position where it may be susceptible to external mechanical damage from; for example, fork lift trucks, overhead cranes etc.

5

1.4 Delivery and pre-installation

e) The main electrical supply input to the

checks

heater has been interrupted during the heating mode.

The heater is supplied wrapped in heavy duty protective polythene. On receipt of the f) The heater has been subject to and heater, the following checks should be affected by the ingress of water in any form. carried out; a) The model is as per order g) The heater is not operated at the rating(s) laid down in the manufacturers technical b) That it is undamaged specifications. c) That it is suitable for the fuel supply h) The heater has not been operated or used within the normal scope of its intended d) That it is suitable for the electrical supply application.

If any of these points are not satisfied then i) The manufacturer's recommended contact should be made with the Sales minimum service requirements have not

Office at Benson Heating as soon as possible by Telephoning 01384 489200. In been complied with. the case of claims for damage, this must be signed for as damaged and be reported in

Note (ii)

All warranty claims must contain the writing within 24 hours of delivery, in order to following information to enable processing to comply with insurance criteria. take place;

(1) Heater model.

1.5 Warranty

(2) Heater serial number

The heater is supplied with a 1 year parts and labour warranty and a further year on all parts excluding consumable’ s.

In addition to this there is also a 10 year time related warranty on the combustion chamber.

The warranty commences from the date of dispatch from the manufacturer, and is subject to the terms detailed within the

Benson Heating 'conditions of business'.

Note (i)

The warranty may be invalidated if - a) The installation is not in accordance with the general requirements of this manual. b) The flue arrangement and air supply for the heater are not in accordance with the manufacturers recommendations, codes of practice, or similar standards. c) Air flow through the heater is not in accordance with the manufacturers technical specifications. d) Internal wiring on the heater has been tampered with or unauthorised service/ repairs undertaken. with full installation details (name and address)

(4) Details or symptoms of fault

(5) Installers name and address.

Faulty parts must be returned to the Benson

Spares Department, the address of which is provided at the rear of this manual. Any such parts will undergo inspection to verify the claim.

Replacement parts supplied prior to this may be charged, and a credit supplied upon subsequent validation of the warranty claim.

Consumable items are specifically not included within the scope of the warranty.

Note (iii)

Notification is required immediately a fault is suspected.

The manufacturer will not accept responsibility for any additional damage that has been caused, expense incurred, or consequential loss resulting from any failure of the heater(s).

6

2.0 Location/positioning

Warning

All of the basic criteria must be satisfied

Where the passage of cold air causes problems (e.g by entrances, loading bays prior to commencing installation and etc) it is considered favourable if the heater commissioning, additionally, the Unit Heater must be positioned and installed so as to comply with all the relevant standards and guide lines (see section 9.0), as well as is positioned so as to discharge towards or across the cold air source from a distance from 1.5m - 6m dependent upon the size of the entrance and the air throw meeting National and Local Fire Regulations and Insurance criteria, especially if it is characteristics of the heater. proposed that the heater is to be installed within a special risk area (e.g. proximity to where petrol engined vehicles are stored or parked, where cellulose spraying takes place, where woodworking machinery is operated, etc,).

Indirect fired heaters must not be located in

On exposed walls heaters should be positioned so as to discharge towards, or along the length of the exposed wall. In areas where it is proposed that more than one heater is to be installed, a general scheme of circulation should be drawn up and maintained, thereby offering the best heat distribution. hazardous areas, however, it is permissible for the heater to supply air to such areas.

The heater must not be installed within an

Air pressure within the area heated and the outside air pressure must remain the same, factors influencing this would be the environment where there is a high presence of extraction systems, ventilation concentration of chlorides, fluorides, salts, or other aggressive or volatile chemicals/ compounds. Nor should the heater be positioned where high winds or draughts could adversely affect the burner.

The heater must be installed so that it is level. Supports for the heater must be sufficiently robust to withstand the weight of the heater and any ancillary equipment. Any combustible material adjacent to the heater or flue system must be so placed or shielded so that its surface temperature does not exceed 65°C

The location chosen for the heater must systems, and various types of process plant.

OUHA 60-100 models can be installed to allow the fans to work in opposite directions.

This enables the heater to be installed centrally in the area to be heated and allows warm air to be discharged to both the front and rear of the heater.

2.1 Fuel supply - general

allow for the fitting of an effective flue system.

The location must also allow for adequate clearance for the air supply, return air circulation, oil supply, electrical supply, whilst also providing good and safe working access.

Suspended free blowing Unit Heaters are at their most effective when located as close to the working area as possible. However care should be exercised to avoid directing the discharged air directly onto the occupants of the area to be heated.

The Benson range of oil fired heaters are all manufactured and pre-set for use with 35 second gas oil delivered to the burner via a suitable piped system from the oil storage tank.

Galvanised or plastic pipe work and fittings must not be used. (see BS 5410

Part 1 1997)

The constraints of the application will, to a large extent, determine whether it is preferable to use a single pipe gravity feed system, or whether the two pipe pumped system is more appropriate.

Where more than one appliance is to share a common supply it will be necessary to use a pressurised ring main system.

7

All pipe work must be constructed and installed so that it does not permit the ingress of air.

The construction, size, and position of the oil storage tank must take account of the current regulations, as well as suiting the requirements of the installation.

Caution

On pumped systems always check that the pump is correctly set up prior to running, and always ensure that valves are open allowing a free flow of oil through the system.

2.2 Fuel

In order to promote trouble free operating it polyethylene oil tank OFTEC certified to

OFS T-100 may be used. Local, national,

European and fire regulations must also be complied with and must include:

A fuel level gauge (not made from glass) a vent pipe with a diameter greater than that of the filler and featuring a weatherproof termination.

A sludge valve.

An outlet valve situated at the opposite end of the tank to the sludge valve.

A filler pipe connection situated at the opposite end to the outlet valve.

The size of the storage tank must take is necessary that the oil within the storage tank and oil line does not fall below the cold filter plugging point (cfpp), in this country and with class D fuel (also referred to as gas oil). The critical temperature is -4°C for this summer grade.

The cfpp critical temperature for the winter grade is -12°C. If summer grade fuel is stored for winter use in areas prone to severe frosts and low temperatures it will be necessary to insulate or even heat the supply tank and pipe work.

Note

The fuel supplier should be contacted prior account of the estimated consumption and any quantity price breaks offered by the oil supplier.

It is preferable to install the tank outside, however, if this is not practicable and the tank has to be installed indoors advice must be sought about its siting, especially so far as fire regulations are concerned.

If a separate fire resistant chamber cannot be provided for indoor installations, a catchment pit with a capacity ten percent greater than that of the storage tank must be provided to installation so that any requirements concerning delivery, transport, storage and

Storage tanks can if necessary be sited on a roof, but this is subject to special regulations use can be addressed before work as well as local authority approval and commences.

Warning

The pump pressure must not exceed a maximum of 0.4 bar, this is because beyond this point gas is liberated from the oil. compliance with fire regulations, reference to BS 5410 part 2 1978 & part 1 1997 is strongly suggested.

It is advisable to leave the tank unpainted on the inside, but to paint the outside with a proprietary grade of anti-corrosive paint .

The heaters are set for single pipe operation. A bypass plug is provided A galvanised or open topped tank is strictly separate with the burner for conversion to not allowed. two pipe see Riello manual.

All oil storage tanks require a bund

The Control of Pollution Regulation (Oil

2.3 Storage tank

Storage) 2001 should be consulted prior to installation.

An externally painted steel storage tank to

BS 799 part 5 1987 or a medium density

8

2.4 Single pipe system (gravity feed

)

For installations where the oil tank is 200mm or more above the level of the fuel pump the principle of gravity feed may be used.

The draw off point for the supply to the burner must not be positioned any lower than 100mm above the bottom of the tank.

Caution

The Deareator must be fitted the burner side of the inlet fuel filter

Maximum lift should not exceed 3.5 metres, and the vacuum should not exceed 0.4 bar.

Each heater must have a separate fuel supply.

Where a return valve is fitted this must be Note tamper proof to prevent inadvertent It is strongly recommended that the separate operation. manual concerning the operational details of the burner supplied with the heater as part

Caution of the information package is studied prior to

If the valve is closed when the pump is installation. running the oil pressure can be increased sufficiently so as to cause damage to the seals within the pump.

2.6 Pressurised ring main system

The return oil should preferably be This system is used to supply a number of discharged through an elbow onto a tank units from a common storage tank. plate situated within the tank, this should be positioned so as not to introduce air or air A booster pump is used to provide the bubbles into the draw off pipe. pressure to push the oil around the ring main and back to the tank.

2.5 Two pipe system

Pressure reducing valves should be fitted on the delivery pipe to each heater to ensure

This is used where the oil storage tank is that the pressure at the burner pump is less lower than the pump. than 6 psi.

Access for the fuel feed to the burner should Caution be via a suitable tapping made in the top of The internal by-pass plug must be removed the tank, and the fuel feed pipe should from the burner pump when used in a extend to not less than 100mm above the pressurised ring main application . bottom of the tank.

A none return valve with a metal to metal

2.7 Pipe work and fittings

seat should be fitted, especially if the return pipe work is terminated at a level above the Caution draw off tube. The non- return valve must be Galvanised or plastic pipe work and removable for service and maintenance fittings must not be used. (see BS 5410 purposes, and the return pipe from the Part 1 1997) pump must therefore be extended down into the tank to the same level as the suction All joints must be sealed properly, if pipe. necessary using PTFE tape or other approved sealing media.

The presence of a tamper proof isolating valve fitted within the return pipe is only required if there is a risk that oil will siphon out of the tank if the return pipe is

The pipe work must be effectively sealed so as to prevent the ingress of air.

maintenance or servicing and if the none return valve has been omitted. installation to ensure that there is no loose debris or scale present.

9

Typical Fuel Layout

H

Maximum

4 metres

BURNER

H m

0

0.5

1.0

1.5

2.0

3.0

3.5

I.D.

8mm

35.0

30.0

25.0

20.0

15.0

8.0

6.0

I.D.

10mm

100.0

100.0

100.0

90.0

70.0

30.0

20.0

The pump suction should not exceed a maximum of 4 metres.

Beyond this limit gas is released from t he oil.

H The ret urn line should terminate within t he oil tank at the same level as t he suction line; in this case a non ret urn valve is not required.

Should, however, the return line terminate over the f uel level, a non return valve is es sential.

This solution, however, is less saf e than the previous one, due to possibility of leakage of the valve.

Priming the pump: Start the burner and await priming.

Should lock-out occur prior to arrival of the fuel, wait at least 20 s econds before repeating the operation.

BURNER

H

The pump suction must not exceed 4 metres; beyond this value the pump becomes noisy.

The return valve must termin ate at the same level as the foot valve, otherwise the pump may become air locked.

1 GATE VALVE

2 IN-LINE FILTER

3 PUMP

4 RELIEF VALVE

5 PRESSURE GAUGE

6 PRESSURE REDUCING VALVE

7 RETURN TO TANK

7

3

4 5

1 2

6 6

10

Black iron pipes can be hammered to assist in the removal of these contaminants.

Note

The oil feed to each heater must be fitted with a fire check valve and isolating valve.

The fire check valve must be operated by and the heater must conform to the appropriate IEE regulations.

All heaters are supplied pre-wired, all must be earthed. fused and

The Control fuse ratings are detailed on the appliance data plate. way of a fusible link positioned so that it is above the burner.

Note

Warning

Ensure that the electric and oil supplies are turned off before any electrical work is

Any waste oil or sludge must be carried out on the heater. disposed of correctly.

Ensure that wiring cannot make contact with

Never

dispose of it by dumping or any surfaces liable to be subject to high tipping it down drains or into temperatures or where the insulation of the wiring could be impaired as a result of such watercourses where ground water can become polluted and environmental contact. damage caused.

Final connections for any additional external controls must be completed on site, and

2.8 Electrical supply

must be carried out according to IEE regulations.

Wiring external to the unit heater must be installed in accordance with any local, national, and European regulations, as well as meeting the appropriate requirements of

IEE regulations.

The means of connection to the main electrical supply must allow for complete electrical isolation of the heater, furthermore, in the case of a unit wired for a three phase supply, the supply should only be used to serve the heater itself and no other plant or equipment. The position of the isolation switch must be such that it is adjacent to the heater and easily accessible at all times. In addition, the isolator itself must have a contact separation of not less than 3mm.(as per BS5991 clause 20.2).

Separate user information is provided for the time control unit and the burner, and forms part of the product information pack which accompanies every heater when despatched.

Caution

The main electrical supply must not be switched off or disconnected as a method for stopping the heater, the exception to this is in an emergency, or during servicing, when the heat exchanger has been allowed to cool sufficiently to prevent any damage from occurring. Claims for damage will not be considered if they have resulted from incorrect wiring or the incorrect use of the heater.

All connections must be checked to ensure

Always ensure that the appropriate that they are secure, and free from

personal protective equipment is used. corrosion.

Terminals and connections should also be

2.9 Air Supply

checked to ensure that no stray strands are bridging terminals.

Provision must be made for the existence of an air supply in order to satisfy both

Electrical continuity should also be checked. combustion and ventilation criteria.

Cables, conduit, and fittings that are used to

It is a requirement that the area where the make the connection between the isolator air heater is located must have a permanent

11

air vent of negligible resistance direct to the

2.9.1.1 Natural Ventilation Openings

outside air.

to the Heated Space.

Such air vents must be positioned so as not to become blocked or flooded, nor should less than 0.5 air changes per hour then they be placed so as to introduce undesirable matter (e.g. flammable, volatile, or aggressive chemicals/compounds or openings will only be necessary.

The minimum free area of the low level natural ventilation opening shall be: substances) either direct from the outside, or provision for low level natural ventilation through their proximity to an adjacent

If the heated space design air change rate is

2cm

2

for each kW of rated heat input extraction system.

The low level natural ventilation opening

Note It is strongly recommended that BS

6230 is referred to for further information mechanical or natural. should be situated on an external wall and be within 1000 mm of floor level for natural concerning ventilation requirements mechanical type, and the outlet is either gas and ideally at floor level for l.p.g gas installations but in any event no higher than

Where mechanical ventilation is used it is a requirement that the inlet is of the

250 mm.

The table in the next column provides specific data for each heater model as -

2.9.1 Heaters installed within the heated space.

Model

Minimum Free Area of ventilation opening

Where heaters are installed within the space to be heated (i.e. not a plant room or enclosure) then:

Combustion air or heater related ventilation air will not be required if -

• The design air change rate of the heated space is 0.5 air changes per hour or greater or

The design air change rate may be satisfied by natural infiltration or by mechanical ventilation

Combustion and General ventilation will be

required if -

The design air change rate of the heated space is less than 0.5 air changes per hour or

• Where the heated space has an air change rate of less than 0.5 air changes per hour then it will be necessary to provide either natural ventilation openings to the heated space (section 2.9.1.1 refers) or the mechanical ventilation of the heated space (section 2.9.1.2. refers)

30

40

60

70

90

100

2.9.1.2

High Level Low Level

Mechanical Ventilation to the

Heated Space.

cm

2

None

None

None

None

None

None cm

2

68

88

128

166

192

230

In the event that the heated space has a design air change of less than 0.5 air changes per hour and that installer prefers to mechanically ventilate the heated space rather than provide ventilation openings then

-

• The heated space needs to be mechanically ventilated so that the design air change is 0.5 air changes or greater.

12

It is a requirement that the mechanical ventilation shall be of the ‘input’ type

15% of the wall height. with either natural or mechanical The low level natural ventilation opening extraction. should be situated on an external wall and be within 1000 mm of floor level for natural

Systems of mechanical extraction with a natural inlet shall not be used. gas and ideally at floor level for l.p.g gas installations but in any event no higher than

250 mm.

It is necessary to provide an automatic means to safely inhibit heater(s) The table below provides specific data for operation should mechanical air each heater model as - supply fail for any reason.

Minimum Free Area of ventilation opening

2.9.2. Heaters Installed within a Plant

Model

High Level Low Level

Room or Enclosure.

cm

2 cm

2

A plant room means a room housing the heater plant and probably other items of building service plant and would generally have generous space for maintenance.

30

40

68

88

134

176

An enclosure is where the heater is installed within a compartment or confined area where space is limited.

Where heaters are installed within a plant room or enclosure then provision for both combustion air and air for general ventilation will be required by means of high and low level ventilation openings (sections 2.3.2.1 refers to plant room applications and

60

70

90

100

128

166

192

230

258

332

384

460

2.9.2.2 Natural Ventilation Openings to Enclosures

sections 2.3.2.2 refers to enclosure For enclosure applications the minimum free applications). area of ventilation opening shall be:

Alternatively the plant room or enclosure may be mechanically ventilated (section

At high level 5 cm rated heat input.

2

for each kW of

2.3.2.3 refers).

• At low level 10 cm rated heat input.

2 for each kW of

2.9.2.1 Natural Ventilation Openings to Plant Rooms

For plant room applications the minimum free area of ventilation opening shall be:

At high level 2 cm rated heat input.

At low level 4 cm heat input.

2

2

for each kW of

for each kW of rated

The high level ventilation opening should be sited on an external wall and positioned as high as is practical and always within the top

The high level ventilation opening should be sited on an external wall and positioned as high as is practical and always within the top

15% of the wall height

The low level natural ventilation opening should be situated on an external wall and be within 1000 mm of floor level for natural gas and ideally at floor level for l.p.g gas installations but in any event no higher than

250 mm.

The table in the next column provides specific data for each heater model as -

13

Model

30

40

60

70

90

100

Minimum Free Area of ventilation opening

High Level Low Level cm

2 cm

2

170 340

220

320

440

640

415

480

575

830

960

1150

MODEL

30

40

60

70

90

100

Mechanical

Ventilation Rate for

Plant Room or

Enclosure

M

3

/h

141

182

265

344

397

476

2.9.2.3 Mechanical Ventilation to a

Plant Room or Enclosure.

2.10 Warm Air Circulation

In the event that the installer prefers to mechanically ventilate the plant room or enclosure rather than provide ventilation openings then -

• The plant room or enclosure needs to be mechanically ventilated at the rate of 4.14 m

3

/h of fresh air per kW or rated heat input.

The air heater should be positioned to enable maximum circulation of discharged warm air within the area to be heated, whilst taking account of personnel within the area, sources of cold air ingress, and obstructions.

Ensure louvres are adjusted outwards and ensure blades are not resonating

The air temperature rise on passing the heat exchanger is typically around 340°C

It is a requirement that the mechanical ventilation shall be of the ’input’ type

A full and unobstructed return air path to the with either natural or mechanical air heater must be provided (see 2.9 Air extraction. Where mechanical extraction is selected then the extraction rate should be 5%-10% less

Where the heater is positioned to deliver than the input rate. blown air through an opening in a wall, return air intakes should be located so that

• Systems of mechanical extraction with a natural inlet shall not be used. they cannot become blocked. Similarly these intakes must be positioned so as not to draw

• in odours, fumes, hazardous vapours or

It is necessary to provide an automatic means to safely inhibit heater(s) operation should mechanical air particles. supply fail for any reason.

The table opposite provides specific data for each heater model as -

14

2.11 Flue system.

The condensate pipe from the flue to the disposal point must be made from corrosion

Warning resistant pipe of not less than the internal

It is essential that the products of diameter of the drain pipe. combustion are flued to the outside of the building. Each heater must have its own separate flue, with a flue diameter of not less than is detailed in this manual.

The minimum vertical length of flue must not be less than 1m. The number of bends should be kept to a minimum.

It is strongly advised that BS 5854; 1980, and BS 5440; parts 1 and 2, are used as consultative documents when considering flue requirements.

Care should be taken to ensure that the flue

If the flue passes through a wall, ceiling, or roof made from combustible material then it has to be sleeved so as to provide a minimum of a 25mm void between the exterior of the flue and the internal wall of the sleeve. The maximum permitted temperature of any adjacent combustible material is 65°C.

The position of the flue and its terminal should be such that it does not impair the combustion process. It should terminate in an exposed position so as to allow the escape and dissipation of flue gases without terminal is not situated in a high-pressure area, the proximity of buildings and other obstacles which will influence this must be taken into account, preferably at the design risk of their re-entering the property through windows, ventilation ports, etc.

The flue should extend to at least 1m above stage.

Provision must be made for the the height of any object within 3.5m of the terminal. disconnection of the flue for inspection and service requirements, and it is strongly

Flue terminals should be fitted on all flues, the terminal must be of the approved type, advised that where bends are fitted and have outlet grilles on all sides giving a inspection covers are included.

Flue should be supported at intervals not exceeding 1.8 mtrs total free area of at least double that of the flue.

Caution

The materials from which the flue is

It is imperative that the flue should be properly sealed where it passes through the constructed must be non-combustible, roof, this can best be achieved by using the resistant to internal and external corrosion, and be capable of withstanding the stresses and loadings associated with normal use. approved method of roof flashing plate and cravat.

Note

When designing the flue system the It should be noted that claims made under prevention of the formation and entrapment warranty and attributed to the ingress of consideration. approved method of sealing has not been used, or if the design of the flue has not

Twin wall or insulated systems are made provision for possible condensation recommended, as they tend to inhibit the formation of condensates. problems.

Where condensation is unavoidable traps should be included to encourage the condensates to flow freely to a point from which they may be released, preferably into a gully.

15

3.0 Installation

3.1 Installation Mounting Heights

In either case the installer should ensure

OUHA models

that the wall wall fixings or other support medium is capable of supporting the weight

The Heater must be installed within the mounting heights indicated below in metres. c) On a level non-combustible surface capable of adequately supporting the weight

The following clearances in mm must be of the unit and ancillary equipment . observed *when suspended:

Model Size

OUHA Min Max

3.3 Minimum clearances

30 2.0 2.7

The following minimum clearances (in millimeters) are recommended when installing the heater.

40 2.0 2.7

60 2.4 3.0

Model

30 40 60 70 90 100

70 2.4 3.5

Above 300

90 2.5 3.5

Below* 300

100 2.4 3.5

RHS

LHS

680

250

810

3.2 Heater Mounting

The heater and flue must be adequately supported by one of the following methods;

a) Suspension by steel drop rods or straps

Rear

OUHA

Rear

OUHC

400

200

560 from the M10 fixing points located on top of the heater. These must be of sufficient strength to safely carry the weight of the unit and ancillary equipment. The straps may

3.4 Flue Installation

An integral flue spigot is fitted to all unit only drop vertically to eyebolts, if used; I.E.

They must not be joined to the eyebolt at an

Heaters thereby allowing the flue to connect directly to the heater. angle to the vertical, and eyebolts if used should be of an approved type. The design of the flue must ensure that it can be disconnected to allow for cleaning b) OUH heaters can be mounted on and servicing, furthermore, all of the flue specifically designed cantilever wall or section joint sockets must face upwards, vertical stanchion brackets which locate and the seal between the sections achieved directly to the four M10 fixings on the heater through mechanical joints or through the use casing. of approved caulking string and grout.

Alternatively OUHA or OUHC units can be It is strongly advised that BS 5854 and BS mounted on cantilever type wall brackets 5440 parts 1 and 2 are referred to. however consideration must be given to ensure that the bracket is large enough to Where condensation is likely to be a support the heater whilst providing the problem provision should be made necessary clearances. preferably at the design stage.

16

3.5 Oil Installation/connection

The oil tank must be positioned so that there is a fall of 7.5mm (+/- 2.5mm) for every

30mm away from the outlet and towards the sludge/drain valve, which must be sited at the lowest point in the tank. If the tank is positioned on supports then there must be must be carried out according to IEE regulations.

Separate user information is provided for the time control unit and the burner, and forms part of the product information pack which accompanies every heater when despatched. an adequate protective layer between tank and support to prevent damage or Warning deterioration through corrosion. It is strongly suggested that reference is made to BS

5410 ; part 2 ; 1978.

It is also suggested that the installer is familiar with the detail and requirements contained within sections 2.1 through to

Always isolate from mains electrical supply before commencing work on the heater.

Always ensure that the appropriate personal protective equipment is used. section 2.6 of this manual prior to

3.7 Heater Control Installation

commencing installation.

Warning

Prolonged exposure and contact with Gas

Oil can result in the natural oils being removed from the skin, sensitisation can result in dermatitis.

Always ensure that the appropriate personal protective equipment is used.

3.6 Electrical Installation/connection

Benson unit heaters are only available in

230V 50Hz 1PH.

It is recommended that reference is made to the wiring diagrams contained within section

7 of this manual prior to installation or connection to the supply. The electrical supply must be as specified and suitable for the heater, and must be run within conduit to a point adjacent to the heater, and be terminated to provide an isolation point that will prevent remote or inadvertent activation.

Cables, conduit, and fittings that are used to make the connection between the isolator and the heater must conform to the appropriate IEE regulations.

Warning

Isolate heater from mains before undertaking any electrical work.

Unless specified all Unit Heaters are manufactured and supplied with a remote controllers are available to be wired back to the heater.

Refer to Controller instruction manual for full installation details.

See section 7.0 for individual wiring diagrams.

All heaters are supplied fused and

pre-wired, all must be earthed.

Final connections for any additional external controls must be completed on site, and

17

4.0 Commissioning

Note:

It is a requirement that only suitably qualified and competent personnel are allowed to undertake the commissioning of the heater.

It is also strongly recommended that prior to commissioning the engineer

(f) Check that fan is free to rotate and the guards are in place.

(g) Ensure that the flue is secure, adequately supported, and that the various joints are properly sealed.

(h) Check that there is provision for flue gas sampling and that this sample point can be plugged and sealed after commissioning.

familiarises himself with; the information contained within the information pack that accompanies the heater, the heater itself, and with the specific requirements

(i) Remove cover from fan limit stat assy check that the fan and limit stat settings have not been disturbed.

(j) Ensure that the burner is securely of the installation/application. attached to the heater.

(k) Test for electrical earth continuity

Warning between the heater, oil pipe work, and

All Unit Heaters undergo a rigorous test mains supply. programme prior to being despatched, whilst (l) Turn on main electrical supply. such a programme does involve precommissioning and setting up the heater to

(m) Enable fan on via controller by selecting

‘Fan only’; ‘Vent only’; ‘Vent/Manual’.* operate efficiently and well within its (* dependent on control type supplied. Refer designed operational limits, this does not to individual controller operating manual.) mean that on site commissioning is less (n) Check to ensure burner is off but power important than might otherwise be the case. remains to the fan. The fan will start

The idiosyncrasies of each installation can enabling fan direction etc to be verified. only ever be allowed for, through the use of Reset Fan on/standby switch to off. thorough on site commissioning carried out (o) Set room thermostat and time clock to by trained and experienced personnel 'demand' positions. equipped with the correct tools and (p) Turn mains electrical supply to off, apparatus. replace and secure lower louvered panel covering fan and motor assembly.

Note

It is strongly recommended that equipment used for the sampling and analysis of flue gases is accurate to within +/- 0.1% and maintained so that it is regularly calibrated.

4.1 Commissioning - Pretest

4.2 Commissioning - Ignition

Note

It is strongly recommended that the separate manual concerning the operational details of the burner supplied with the heater as part

Check to ensure electrical safety, and inspect and check the oil installation, testing for leaks. of the information package is studied prior to commissioning.

Time intervals within the ignition sequence will vary slightly from one model to another.

(a) Ensure that the electrical supply is turned off.

(b) Ensure that the oil supply is turned off.

(c) Check that all panels and fasteners are secure and in place.

(d) Check that the heater is installed correctly and that the support is adequate.

(e) Ensure that warm air delivery outlets are open.

Warning

Do not proceed with commissioning unless all the criteria detailed have been satisfied.

(a) Ensure the electrical supply is turned off.

(b) Ensure that the Oil supply is turned off.

(c) Turn on main electrical supply.

(d) Enable burner via controller by selecting

‘Heat’ (Relay 2); ‘Heat On’; ‘Heat/Auto’. *

(* dependent on control type supplied. Refer

18

to individual controller operating manual.)

(e) Select 'on' position for heater on/standby switch.

(f) Check for the following burner sequence

1 <5s Combustion air damper actuated, burner fan motor initiates purge cycle...

2 <40s Solenoid valve opens ignition transformer provides spark for burner ignition...

-------- E I T H E R --------

3 >15s Ignition failure caused by oil

starvation resulting in burner lock-out/shut-down...

(g) Set heater on/standby switch to standby and then automatically re-lights once the minimum off period has elapsed (Separate information on the time clock is contained within the information package supplied with the heater).

(p) Check limit stat by isolating fan control circuit

The time between the fan stopping and burner shut down should be noted.

If the time interval between fan stop and burner shut down is greater than 2 minutes

Check settings on fan and limit stat are correct.

(q) Undertake flue gas analysis using approved and calibrated analysing equipment recording data on the commissioning card, ie, CO, CO

2 gross flue temperatures.

, net and position

(h) Attach oil manifold (bleed screw and pressure gauge)

(i) Open oil supply valves and bleed air from

Record burner oil pump pressure, ambient temperature, barometric pressure, and smoke reading (0 - 1 Baccarach scale). pipe work and adjust burner oil pressure as per detailed in burner manual (section B)

Note (i)

The burner air and oil pressure settings

(j) Repeat steps c,e,f. should be only very finely adjusted to achieve a CO

2

reading of 12.5% (+/- 0.5%).

----------- O R ----------

3 >15s Pilot ignition... Burner ignition...

Note (ii)

The gross efficiency must be approximately

Warning spigot point.

If burner ignition is not satisfactorily Note (iii) accomplished, commissioning must not All Unit Heaters are test fired and preproceed until the reason or fault has been identified and rectified, if necessary by reference to the separate burner information or to section 6 of this manual.

(k) Repeat steps 4.2 c,a,

(l) Repeat steps 4.2 d,e,f, allowing the heater to reach thermal equilibrium. commissioned as part of the manufacturing process, if however, during on site commissioning the data are found to be not in accordance with the manufacturers data, then the following action is recommended.

* Re-check all readings and calculations.

* Adjust burner as per manufacturers instructions.

* Consult Benson Heating Technical

(m) Adjust room thermostat to its highest setting, and allow the heater to continue to fire.

(n) Gradually reduce the temperature setting on the room thermostat until the burner shuts down, (@ < ambient and then gradually increase the temperature setting on the thermostat until heat is called for, (@

> ambient) and the burner automatically refires.

(o) Re-set time clock to a minimum off period, checking that the burner shuts down,

Department.

(r) Complete commissioning card and provide operating instructions for the user, high-light the fact that the manufacturer recommends that in the interests of safety and efficiency the heater is serviced on a regular basis only by qualified and competent persons.

19

The completed commissioning card must be (c) If the current drawn is too low the duct returned to Benson Heating Service outlet grilles will require opening to reduce satisfactory completion of commissioning, this is not the case overheat cut outs can be failure to do so can invalidate any caused. subsequent warranty claim.

(s) Set all controls to the requirements of the user.

4.4 Commissioning - hand over

(t) Final adjustment for the direction of the air flow from the heater should be made.

(a) Upon full and satisfactory completion of commissioning, a record of commissioning information (contact, date, etc) should be left with the heater, a copy of which must also

4.3 Commissioning - air delivery

be forwarded to Benson Heating Service

system

Department.

Final adjustment of the air louvres are

(b) The commissioning engineer must adjusted outwards and ensure blades are ensure that the user is familiar with the safe not resonating. and efficient use of the heater, detailing the function of all controls, and main

Caution

On ducted applications it is necessary that the system is balanced in order to optimise the efficiency of the heater and the air components.

(c) The user should be made aware of the following in particular: distribution and delivery system Failure to balance the system can result in fan motor

(i) Lighting, shutdown, and operational overloading and premature component information. failure, it can also result in an inefficient heating/ventilation system.

(ii) Safety features, data plate, and labelling.

(a) Check that the amount of fan produced

(iii) The requirement for regular inspection - air volume is in accordance with the heater especially if the heater is within a more specification, if the volume is too great the demanding environment - and the need for fan can be overloaded. Ensure that the regular servicing carried out by competent running current is as per that stated on the and qualified persons. heater data plate.

(d) Section C 'User Instructions' should be

Alternatively, the static pressure should be left with the customer upon satisfactory measured at the start of the ductwork to completion of the commissioning and confirm that it is within the permissible hand-over.

tolerance.

(b) If the current drawn is greater than the stated running current, in most probability this will be caused by insufficient static pressure within the ductwork, in which case system resistance should be increased through the introduction of a damper placed as close to the start of the ductwork as possible, thereby resulting in a reduction in drawn current.

The damper should be adjusted until the current is in accordance with that stated on the data plate.

20

5.0 Servicing

Warning

5.1 Planned Servicing

Servicing must be carried out on a regular In order to maintain the efficient operation of basis, the maximum interval between the heater it is recommended that the services being 1 year. following planned servicing and preventative maintenance programme is adopted by the

In certain applications the frequency of user. servicing will have to be increased , this to a large extent is governed by the working Quarterly Inspection- environment.

(a) Visual inspection of the burner

It is a requirement that only suitably qualified and competent persons are allowed to (b) Clean and check spark electrode undertake servicing.

(c) Clean and check photocell

Before any maintenance or servicing work is carried out the heater must be (d) Check overheat safety is operational shut down and allowed to cool, and have the oil and electric supplies to it turned Bi-Annual Inspection- off at the supply valve and isolator respectively. (a) As per quarterly inspection, plus...

Caution (b) Combustion check

Certain component parts are factory sealed and are designed so as to be tamper proof. (c) Smoke test

Usually such items do not require servicing, and therefore should not be tampered with. Annual Inspection-

Failure to comply with this can invalidate any (a) As per half year inspection, plus... warranty, and can also lead to premature failure. (b) Heat exchanger and cleaning

The following parts fall within this category: (c) Electrical connections room thermostat, time clock, frost thermostat, sequential controller, and fan and motor.

(d) Main fan motor assembly

Additionally, the fan and limit stat has been factory set, and must not be re-set without formal consent from the manufacturer.

(e) Oil supply including filter

(f) Burner

Reference should be made to the separate information covering the operational details of the burner and timer.

(g) Air delivery system

(h) Flue

Only approved spare/replacement parts can be fitted, failure to comply with this can compromise the safe and efficient running of

5.2 Servicing Procedure - Major

Component Parts

the heater, and can also invalidate any warranty claim.

Flue

A visual inspection should be carried out to ensure that the flue remains adequately supported, both internally as well as

21

externally, and that the various joints are effectively sealed.

Inspection covers, where fitted, should be removed and the flue checked to see whether cleaning is require If inspection covers are not fitted the flue gas exit duct and flue spigot will provide not only an indication of the cleanliness of the flue, but will also enable access for cleaning.

The presence of the flue terminal should be checked. If a condensate trap and drain facility is fitted this should be checked to ensure that it continues to function correctly, and the drainage of condensates is not impaired. removed by using a vacuum cleaner.

(d) Particular attention should be paid to the upper internal surfaces of the tubes, where through convection heavier deposition is likely to occur.

(e) Any deposits which may have accumulated within the combustion chamber can be removed with a vacuum cleaner once the burner is removed.

Note

It is most important that a build up of deposits is not allowed to occur as this can have an adverse effect upon the efficiency of the heater and reduce the life of the heat exchanger.

Main Fan

Remove dust and other foreign matter by blowing off with compressed air or through the use of a soft bristle brush.

Check that the bearings do not show signs of excessive wear. It should be noted that these bearings do not require lubricating.

Heat Exchanger

The heat exchanger requires a visual inspection at least once per year, this should be accompanied by cleaning.

It is recommended that a flue brush and vacuum cleaner be used to facilitate this.

(f) The heat exchanger and combustion chamber should be visually inspected for signs of splits, cracks, and distortion.

(g) All gaskets should be checked to ensure that they continue to provide a gas tight seal, if there is an element of doubt then they should be replaced.

If the condition of the heat exchanger gives cause for concern the Service

Department at Benson Heating should be advised pending a more detailed examination

Electrical Supply

All connections must be checked to ensure

Access to the heat exchanger is gained through the removal of the rear upper panel and heat shield. that they are secure, and free from corrosion.

Terminals and connections should also be

Servicing and cleaning should be performed as follows:

(a) Remove brass nuts and cover from heat exchanger end assembly to expose heat checked to ensure that no stray strands are bridging terminals.

Electrical continuity should also be checked. exchanger tubes.

(b) Remove any accumulated deposits from the tubes by pushing through the full length

Oil Supply

with a flue brush.

(c) The flue brush should be withdrawn so as to pull any deposits back into the bottom of the flue box where they can then be

The oil supply pipe work, tank, and fittings should all be inspected to ensure that they are free from corrosion, and to ensure that where brackets have been fitted these remain secure and offer adequate support.

22

The oil filter should be replaced with a new

Air Delivery System

one, and the system should be checked for A visual inspection should be undertaken to leaks. If the oil level is such to allow removal ensure that the air delivery system is in good of any sludge or other contaminants form order, that it remains adequately supported the tank this too should be undertaken, and that the various joints are effectively particularly if there have been problems of sealed. poor firing associated with contaminants reaching the burner.

Report

Note A full and detailed service report should be

Any waste oil or sludge must be prepared, it is advised that the report is not disposed of correctly. Never dispose of it completed until the heater has been reby dumping or tipping it down drains or commissioned, where upon the completed into watercourses where ground water report can then be run through with the user.

can become polluted and environmental

damage caused.

5.3 Service Re-commissioning

Burner

Service requirements for the burner fitted to follows, as per section 4.1 through to section the unit heater are covered in the separate

4.4 inclusive. manual prepared by the burner manufacturer.

Note

It is most important that the burner is

The heater should be re-commissioned as

This must be regarded as a necessary part of the heater service. By the service engineer. serviced regularly and in accordance with the manufacturers instructions.

Turbulator Positions Units 30-70. 8 off

Turbulator Positions Units 90-100. 11 off

23

6.0 Fault Diagnosis by Flow Chart

24

25

26

7.0 Wiring Diagrams

Internal Wiring Diagram 33-65-237

OUHA 30-40 ON/OFF Riello Oil Fired Burner

27

Internal Wiring Diagram 33-65-238

OUHA 60-100 ON/OFF Riello Oil Fired Burner

28

Internal Wiring Diagram 33-65-239

OUHC 60-100 ON/OFF Riello Oil Fired Burner

29

Internal Wiring Diagram 33-65-240

OUHA 30-40 HI/LOW Riello Oil Fired Burner

30

Internal Wiring Diagram 33-65-241

OUHA 60-100 HI/LOW Riello Oil Fired Burner

31

Internal Wiring Diagram 33-65-242

OUHC 60-100 HI/LOW Riello Oil Fired Burner

32

Remote Connections 33-65-131

ON/OFF (HI/LOW) to CP4

Remote Connections 33-65-228

ON/OFF (HI/LOW) Less Controls

33

Remote Connections 33-65-228

ON/OFF to SmartCom SC3-SZ

Remote Connections 33-65-229

HI/LOW to SmartCom SC3-MZ

34

8.0 Technical Data

MODEL OUH30 OUH40 OUH60 OUH70 OUH90 OUH100

Heat Output

Heat Input (NETT)

35sec Oil Nozzle

Oil Pump Pressure

35sec

Internal Fuse OU-

HA

Fused Isolator

OUHC kW/hr

Btu/hr kW/hr

Btu/hr

Fuel Consumption

Gas Oil 35sec

Imp gall/hr litre/hr

Burner Type RIELLO

US galls/hr

Type

Psi

Bar

Head Setting Number

Amps

Amps

31.26

106,660

34.24

116,830

0.76

3.5

G5

0.65

80°S

190

13.1

3

6

10

39.78

135.725

44.60

152,175

1.0

4.5

G5

0.85

60°S

190

13.1

6

6

10

58.61

200,000

64.25

219,220

1.43

6.5

G10

1.35

45°S

160

11.0

4

71.88

245,240

82.73

282,250

1.76

8.0

G10

1.75

60°S

160

11.0

5

87.92

300,000

96.04

327,690

2.13

9.7

G20

2.0

60°S

160

11.0

2

102.50

350,000

114.8

391,640

2.55

11.57

G20

2.25

45°S

180

12.4

1.5

Air Setting Number

28sec Oil Nozzle

US galls/hr

Type

Oil Pump Pressure

28sec

Fuel Consumption

Gas Oil 28sec

Oil Connection

Air Throw

(APPROX)

Psi

Bar

Imp gall/hr litre/hr

BSP mtrs

Air Flow (STD) m

3

/sec

ft

3

/min

Pascals

Ins WG

Outlet Pressure

Centrifugal

Temp Rise

Through Heater

Nett Efficiency

°C

°F

%

Sound Level @ 3m

Combustion Chamber pressure

Flue Diameter dba

m/bar

Flue Resistance

Electrical Supply

Rated Input OUHA

Rated Input OUHC mm

Min m/bar

Max m/bar

Standard kW kW

3

0.75

80°S

150

10.5

0.74

3.5

3/8

21

0.9

1900

150

0.6

29

52

91.30

61

0.14

125

-0.1

+0.2

230/1/50

0.55

1.1

5.5

1.0

60°S

150

10.5

0.98

4.45

3/8

23

1.02

2120

150

0.6

32

57

89.23

65

0.14

31

1.6

3400

180

0.72

30

54

91.22

68

0.14

3

1.5

60°S

140

9.5

1.6

7.2

3/8

4.5

2.0

60°S

130

8.8

2.0

9.0

3/8

37

1.9

4050

150

0.6

31

56

89.10

69

0.14

2

2.25

60°S

140

9.5

2.3

10.4

3/8

36

2.44

5180

180

0.72

30

54

91.55

71

0.14

2.8

2.75

60°S

135

9.2

2.5

11.34

3/8

39

2.63

5573

180

0.72

32

57

89.30

72

0.14

125

-0.1

+0.2

125

-0.1

+0.2

150

-0.1

+0.2

-0.1

+0.2

-0.1

+0.2

230/1/50 230/1/50 230/1/50 230/1/50 230/1/50

0.55

1.1

0.9

1.1

0.9

1.1

1.1

2.2

1.1

2.2

6

16

6

16

6

20

6

20

Run Current OUHA

Run Current OUHC

Electrical

Protection

WEIGHT

AIR NOZZLE SIZE

Amps

Amps

IP kg

Ins

1.6

8

20

116

138

1.6

8

20

116

138

2.8

11

20

177

212

2.8

11

20

177

212

3.4

15

20

240

280

3.4

15

20

240

280

35

8.1 Reference Information

Doc/Ref Title/Subject

BS 5410-1 & -2

BS EN 292-1 & -2

BS EN 60204-1

BS EN 60335-1

BS EN 55014

BS EN 50165

BS 5854

Code of Practice for Oil firing

Safety of Machinery

Safety of Machinery - Electrical

Safety of Electrical Appliances

Electromagnetic Compatibility

Safety of Electrical Equipment

Code of Practice - Flues/Flue Structures

BS 799-5

OFTEC OFS T-100

BS 715:1993

BS 5440-1

Oil Burning Equipment - oil tanks

Polyethylene oil storage tanks

Metal Flue Pipes and Fittings

Specification/Installation of Flues

BS 5440-2

BS 779

Ventilation Requirements Gas Appliances

Oil Burning Equipment - Burners

ISO 228/1

(See also BS 2779 and BS 5380)

Pipe Threads Seals and Couplings

36

9.0 Parts Lists

DESCRIPTION 30 40 60 70 90 100

Fan & Limit Stat Assy 20-45-599 20-45-599 20-45-599 20-45-599 20-45-599 20-45-599

Fan/Limit Gasket 20-33-549 20-33-549 20-33-549 20-33-549 20-33-549 20-33-549

Burner Plate Gasket 31-28-080 31-28-080 31-28-080 30-40-156 30-40-156 30-40-156

Overheat Thermostat N/A N/A 28-60-039 28-60-039 28-60-039 28-60-039

Fire Valve 29-03-007 39-03-007 29-03-007 29-03-007 29-03-007 29-03-007

Sight Glass 20-30-151 20-30-151 20-30-151 20-30-151 20-30-151 20-30-151

Sight Glass Holder 20-30-061 20-30-061 20-30-061 20-30-061 20-30-061 20-30-061

Sight Glass Gasket 20-28-084 20-28-084 20-28-084 20-28-084 20-28-084 20-28-084

MCB 6A 28-07-084 28-07-084 28-07-084 28-07-084 28-07-084 28-07-084

Axial Fan 28-09-062 28-09-062 28-09-062 28-09-062 28-09-092 28-09-092

Centrifugal Fan 1ph 28-09-001 28-09-144 28-09-049 28-09-049 28-09-144 28-09-144

Fan Restrictor N/A 33-30-518 31-30-017 31-30-017 N/A TBA

Fuel Filter 29-15-017 29-15-017 29-15-017 29-15-017 29-15-017 29-15-017

Nozzle 27-00-410 27-00-418 27-00-426 27-00-436 27-00-032 27-00-036

Burner 29-99-452 29-99-452 29-99-453 29-99-453 29-99-454 29-99-454

MCB 16A

OUHC ONLY

Relay 4 Pole

OUHC ONLY

N/A

N/A

N/A

N/A

28-07-086 28-07-086 28-07-086 28-07-086

28-25-049 28-25-049 28-25-049 28-25-049

37

10.0 Dimensional drawings - OUHA

38

Dimensional drawings - OUHC

39

11 User Instructions

11.1 Commissioning and hand over

Warning

(b) Burner will fire and establish within

60seconds.

As part of the commissioning programme, (c) As temperature of heater increases, fan the commissioning engineer must go will operate. through the following with the operator.

(i) Lighting, shutdown, and operational

11.4 Stop procedure

information.

(ii) Safety features, data plate, and labelling.

(a) Disable burner by selecting ‘Heat OFF’;

(iii) The requirement for regular inspection - engineer.

‘Standby’.* (* dependent on control type especially if the heater is within a more

Benson Heating or from the commissioning supplied. Refer to individual controller demanding environment - and the need for

Further details are available from either operating manual.) regular servicing, carried out by competent

(b) The burner will turn off. and qualified engineers.

(c) The fan motor will continue to run until

Servicing Manual is adopted by the user. heat dissipation allows the fan and limit stat

Caution of the Installation, Commissioning and to shut down the fan.

After approximately 100 hours of running, service schedule as detailed in section 5.1 the tension on the fan belts must be

Benson Heating advise that the planned

Caution checked to ensure that it is correct, and that

Do not use the main electrical isolator to the belts have not stretched. turn off the heater, to do so can cause undertake the servicing. damage to the heat exchanger and

It is strongly advised that this is undertaken and competent persons are allowed to combustion chamber and thereby invalidate by the commissioning engineer, and not the operator

11.2 Servicing

services being one year.

11.5 Shut down procedure

(a) Follow steps 10.4 (a), (b) and (c), when

Warning main fan stops turn main electrical isolator

Servicing must be carried out on a regular basis, the maximum interval between off, and shut oil valves

11.6 Ventilation only

(a) Enable fan on via controller by selecting

It is a requirement that only suitably qualified the warranty.

‘Fan only’; ‘Vent only’; ‘Vent/Manual’.*

(*dependent on control type supplied. Refer to individual controller operating manual.)

(b) Fan will operate without the burner for the set period of the controller.

11.7 Lockout situations

If either the burner or the fan and limit stat go to lockout, the lockout must be cleared manually before the ignition sequence can be re-initiated.

11.3 Start Up Procedure

Caution

(a) Enable burner via controller by selecting

Repeated or frequent lockouts must be

‘Heat’ (Relay 2); ‘Heat On’; ‘Heat/Auto’.*

(* dependent on control type supplied. Refer a qualified and competent engineer.

to individual controller operating manual.)

Technical Support:

Tel: 01384 489 200

Fax: 01384 489 707 [email protected] www.ambiradgroup.co.uk

40

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