Reznor OUH Series User manual

OUH

Oil Fired

Unit Heater

WARNINGS

Reznor 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.

Reznor® Is a registered trademark of Nortek Global HVAC, LLC.

INSTALLATION AND OPERATING MANUAL

ErP

2018 Part No. D301030 Issue E

Page 2

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

the application and installation of heating appliances and which may be referred to in Brochures, Specications,

Quotations, and Installation, Operation and Maintenance manuals is done so for information and guidance purposes

only and should only be considered valid at the time of the publication. The Manufacturer cannot be held responsible

from any matters arising from the revision to or introduction of new Laws, Standards, Directives, Codes of Practice or

other recommendations.

Bio fuel statement - All our oil red heater products are congured for use on both Class D light distillate fuel oil.

As a result of recent changes made to European legislation regarding the specication of class D heating oil to allow

for the inclusion of 7% FAME (Fatty Acid Methyl Ester) i.e. bio fuel and effective from early 2011, all oil red air heater

products and installations maybe affected.

From April 2011 all our Suspended Oil red Unit Heaters will be tted with Riello burners which are bio fuel

compatible for blends up to 10%.

Please note that the use of bio fuels may give rise to a number of installation issues, to both new and existing plant

which could affect the warranty of the burner. We recommend that you familiarise yourself with current information

from both the burner manufacturer Riello and OFTEC.

IMPORTANT NOTICE TO INSTALLERS

Installers should satisfy themselves that the oil pipework installation is carried out in accordance with all

current legislation, Codes of Practice and recommendations .

Page 3

1. Installation Requirements 6

1.1 Compliance notices 6

1.2 Certicates of conformity 7

1.3 General product information 7

1.4 General requirements 7

1.5 Delivery and pre-installation checks. 8

1.6 Warranty 8

1.7 Health and Safety 9

1.8 Location / Positioning 10

1.9 Fuel supply - general 11

1.9.1 Fuel 11

1.9.2 Storage tank 11

1.9.3 Single pipe system (gravity feed) 12

1.9.4 Two pipe system 12

1.9.5 Pressurised ring main system 12

1.9.6 Pipe work and ttings 12

1.10 Electrical supply 13

1.11 Air supply 15

1.11.1 Heaters installed within the heated space. 15

1.11.1.1 Natural Ventilation Openings to the Heated Space. 15

1.11.1.2 Mechanical Ventilation to the Heated Space. 16

1.11.2 Heaters Installed within a Plant Room or Enclosure. 16

1.11.2.1 Natural Ventilation Openings to Plant Rooms 16

1.11.2.2 Natural Ventilation Openings to Enclosures 16

1.11.2.3 Mechanical Ventilation to a Plant Room or Enclosure. 16

1.12 Air distribution system 17

1.13 Flue system. 17

1.14 Dimensions 19

1.15 Technical Details 21

1.15.1 Reference Information 22

2. Installation 23

2.1 Packaging/siting 23

2.2 Heater Mounting 23

2.3 Minimum Clearances 23

2.4 Warm Air Circulation 23

2.5 Flue Installation 24

2.6 Oil Installation/connection 24

2.7 Electrical Installation/connection 24

2.8 Heater Control Installation 24

3. Commissioning 31

3.1 Commissioning - Pretest 31

3.2 Commissioning - Ignition 32

3.3 Commissioning - air delivery system 33

3.4 Commissioning - hand over 33

Contents Page

Page 4

4. Servicing 34

4.1 Planned Servicing 34

4.2 Servicing Procedure - Major Component Parts 34

4.2.1 Flue 34

4.2.2 Main Fan 35

4.2.3 Heat Exchanger 35

4.2.4 Electrical Supply 35

4.2.5 Oil Supply 35

4.2.6 Burner 36

4.2.7 Air Delivery System 36

4.2.8 Report 36

4.3 Service Re-commissioning 36

5 Parts Lists 37

6. Fault Finding Guide 39

7. Replacement Parts 42

7.1 Bur n e r 42

7.2 Controller 42

7.3 Electrode Assembly 42

7. 4 N oz zle 43

7.5 Photocell 43

7.6 Oil Pump 43

7.7 Contactor 44

7.8 MCB 44

7.9 Fan/Limit Stat Assembly 44

7.10 Axial Fan 45

8 User Instructions 47

8.1 Commissioning and hand over 47

8.2 Servicing 47

8.3 Start Up Procedure 47

8.4 Stop procedure 48

8.5 Shut down procedure 48

8.6 Ventilation only 48

8.7 Lockout situations 48

Contents Page

Page 5

Introduction

Welcome to the Suspended Oil red Unit Heater Range. Local regulations may vary in the country of use and it is the

installers responsibility to ensure that such regulations are satised

All installation, assembly, commissioning and service procedures must be carried out by suitable qualied competent

persons to the statutory regulations in the country of use.

When installing, commissioning and servicing is undertaken on these heaters due care and attention is required to

ensure that working at height regulations are adhered to at the mounting heights specied.

All Dimensions shown are in mm unless

PLEASE READ this document prior to installation and use. The safety of this heater is guaranteed only by the

correct usage in accordance with these instructions, therefore it is recommended that they are retained for

future reference.

The manufacturer reserves the right to alter specications without prior notice.

Page 6

1. Installation Requirements

1.1 Compliance notices

The Suspended Oil red Unit Heater range detailed here with are manufactured within a strictly controlled quality

environment within the parameters of ISO 9001.

These instructions are only valid if the following country code is on the appliance GB. IE. If this code is not present

on the appliance, it is necessary to refer to the technical instructions which will provide the necessary information

concerning the modication of then appliance to the conditions of use for the country.

The Suspended Oil red Unit Heater range have been tested and assessed for compliance with the following

European Directives.

• Machinery Directive: (2006/42/EC)

• Low Voltage Directive: (2006/95/EC)

• Electromagnetic Compatibility Directive: (2004/108/EC)

• Product Liability Directive (85/374/EEC)

The manufacturer has taken reasonable and practical steps to ensure that all Suspended Oil red Unit Heaters are

safe and without risk when properly used. These heaters should therefore only be used in the manner and purpose

for which they were intended, and in accordance with the recommendations detailed herewith.

The Suspended Oil red Unit Heater range has been designed, 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

they are strongly advised to read the appropriate sections of the information pack accompanying the heater, prior to

installation or use.

The manufacturer supports all new products being supplied to their customers with a comprehensive information

pack; this clearly denes mandatory instructions for the safe installation, use, and maintenance, of the appliance(s).

Where proprietary items are incorporated into any Suspended Oil red Unit Heater, detailed information and

instructions are also provided as part of the information pack.

It is the responsibility of the installer, owner, user, or hirer of a Suspended Oil red Unit Heater to ensure that they are

familiar with the appropriate information/manuals supplied by the manufacturer and the safety instructions. In addition,

operators must be suitably trained in the use of the appliance so as to ensure its continued safe and efcient use.

The manufacturer has a commitment to continuous improvement and therefore reserve the right to amend or change

the specication of the Suspended Oil red Unit Heater subject to compliance with the appropriate European, national

and local regulations

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

CAUTION

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.

WARNING

Warning is used when failure to heed or 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.

Page 7

The Suspended Oil red Unit Heater range conform to the following harmonised standards:

BS EN 292-1

Safety of Machinery - Basic Concepts, General Principles for Design Basic terminology, methodology BS EN 292-2

BS EN 292-2

Safety of Machinery - Basic Concepts, General Principles for Design Technical Principles and Specications

BS EN 60204-1

Safety of Machinery - Electrical Equipment for Machines Specication for General Requirements

BS EN 60335-1

Safety of Household and Similar Electrical Appliances General Requirements

BS EN 55014

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

appliances for household and similar purposes, electrical tools and similar electric apparatus

BS EN 50165

Electrical Equipment of non-electric heating appliances for household and similar purposes, safety requirements

1.2 Certicates of conformity

Certicates of conformity are available from the manufacturer, address details are shown on the back page.

1.3 General product information

The Suspended Oil red Unit Heater range have an output range from approximately 40.0 kW to 103kW. Each heater

must be connected to its own individual open ue.

Each heater is tted with a forced draught burner which has been test red and pre-set prior to despatch. The safety

functions of the burner are by way of a fully sequential control box tted to the burner.

Neither asbestos nor soft soldered joints are used in the construction or manufacture of the Suspended Oil

red Unit Heater range. 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.

1.4 General requirements

CAUTION

Ensure the fuel supply is in accordance with the manufacturer’s recommendations and is as stated on the

appliance data plate.

CAUTION

Installation, commissioning, and servicing must only be carried out by appropriately qualied and competent

persons.

WARNING

Unauthorised modications to the appliance, or departure from the manufacturers guidance on intended use,

or, installation contrary to the manufacturers recommendations may constitute a hazard.

To ignore the warning and caution notices, and to ignore the advice from the manufacturer on installation,

commissioning, servicing, or use, will jeopardise any applicable warranty, moreover, such a situation could

also compromise the safe and efcient running of the appliance itself, and thereby constitute a hazard.

Page 8

The installation of the appliance must meet all the relevant European, national, and local criteria.

Prior to installation the following points should be considered;

• The position of the heater for the optimum efcient distribution and circulation of warm air.

• The position of the heater relative to the route of the ue

• The position of the heater relative to the supply of fuel

• The position of the heater relative to the electrical services, and if appropriate, any additional controls.

• The position of the heater relative to the supply of fresh air

• The height if applicable at which the heater is to be mounted and potential stratication /circulation problems.

• The position of the heater relative to service and maintenance requirements

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 provided for the appliance when it is located in a position where it may be

susceptible to external mechanical damage from; for example, fork lift trucks, overhead cranes etc.

1.5 Delivery and pre-installation checks.

The heater is supplied wrapped in heavy duty protective polythene. On receipt of the heater, the following checks

should be carried out;

• The model is as per order.

• That it is undamaged.

• That is suitable for the fuel supply.

• That is suitable for the electrical supply

If any of these points are not satised then contact should be made with the suppliers sales ofce as soon as possible

by telephoning the number shown on the rear page. In the case of claims for damage, this must be signed for as

damaged and reported in writing within 24 hours of delivery, in order to comply with insurance criteria.

1.6 Warranty

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

In addition to this there is 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 Manufactures ‘conditions of business’.

Note (i) - The warranty may be invalidated if -

• The installation is not in accordance with the general requirements of this manual.

• The ue arrangement and air supply for the heater are not in accordance with the manufacturers recommendations, codes of practice, or

similar standards.

• Air ow through the heater is not in accordance with the manufacturers technical specications.

• Internal wiring on the heater has been tampered with or unauthorised service or repairs undertaken.

• The main electrical supply input to the heater has been interrupted during the heating mode.

• The heater has been subject to and affected by the ingress of water in any form.

• The heater is not operated at the rating(s) laid down in the manufacturers technical specications.

• The heater has not been operated or used within the normal scope of its intended application.

• The manufacturer’s recommended minimum service requirements have not been complied with

Page 9

Note (ii) - All warranty claims must contain the following info to enable processing to take place

• Heater model

• Heater serial number

• Order reference/date of order, together with full installation details (name and address)

• Details or symptoms of fault

• Installers name and address.

Faulty parts must be returned to the supplier, 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 specically not included within the scope of the warranty.

Note (iii) - Notication 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).

1.7 Health and Safety

WARNING

The Suspended Oil red Unit Heater range must be installed in accordance with the current OFTEC

regulations for oil red 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 qualied installer. Isolate all electrical supplies to

the heater & controller before proceeding.

For your own safety we recommend the use of safety boots and leather faced gloves when handling sharp or heavy

items. The use of protective eye wear is also recommended.

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

All Suspended Oil red Unit Heaters are tted with a pressure relief facility, this is incorporated into the design of the

ue gas exit duct.

Care should therefore be taken in siting service connections and controls well away from the pressure relief vent.

WARNING

Under no circumstances must the pressure relief be restricted, blocked, or have the free exit of exhaust gas

impaired or re-directed.

CAUTION

Before using this appliance:

• Check that the voltage indicated on the type plate corresponds to the mains supply voltage.

• Ensure that the heater has been securely fastened in its nal mountain position.

WARNING

UNDER NO CIRCUMSTANCES should any item be placed on or above any part of the heater,

whether the heater is being used or not. This appliance must be earthed.

Page 10

1.8 Location / Positioning

WARNING

All of the basic criteria must be satised prior to commencing installation and commissioning, additionally, the

Suspended Oil red Unit Heater must be positioned and installed so as to comply with all the relevant

standards and guide lines (see section 1.1), as well as meeting national and local re regulations and insurance

criteria, especially if it is 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 heaters must not be located in hazardous areas, however, it is permissible for the heater to supply air

to such areas.

The heater must not be installed within an environment where there is a high concentration of chlorides, uorides,

salts, or other aggressive or volatile chemicals/compounds. Nor should the heater be positioned where the burner

could be adversely affected by high winds or draughts.

The location chosen for the heater must allow for the tting of an effective ue system.

The location must also allow for adequate clearance for the air supply, return air circulation, oil supply and 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.

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.

Air pressure within the area heated and the outside air pressure must remain the same, factors inuencing this would

be the presence of extraction systems, ventilation 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.

The heater must be installed on a at and level surface made from non-combustible material, which is sufciently

robust to withstand the weight of the heater and any ancillary equipment. Any combustible material adjacent to the

heater or ue system must be so placed or shielded so that its surface temperature does not exceed 65°C.

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.

Please refer to pages 9 and 10 for additional information.

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 ow of oil through the system.

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