Reznor OUH Series Installation And Operating Manual
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Reznor OUH Series Installation And Operating Manual

Reznor OUH Series Installation And Operating Manual

Unit heater, oil fired
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INSTALLATION AND OPERATING 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.
ErP
2018
Part No. D301030 Issue E

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  • Page 1 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 &...
  • 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, Specifications, 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.

  • Page 3: Table Of Contents

    Installation Requirements 1.1 Compliance notices 1.2 Certificates of conformity 1.3 General product information 1.4 General requirements 1.5 Delivery and pre-installation checks. 1.6 Warranty 1.7 Health and Safety 1.8 Location / Positioning 1.9 Fuel supply - general 1.9.1 Fuel 1.9.2 Storage tank 1.9.3 Single pipe system (gravity feed) 1.9.4 Two pipe system 1.9.5 Pressurised ring main system...
  • Page 4 Servicing 4.1 Planned Servicing 4.2 Servicing Procedure - Major Component Parts 4.2.1 Flue 4.2.2 Main Fan 4.2.3 Heat Exchanger 4.2.4 Electrical Supply 4.2.5 Oil Supply 4.2.6 Burner 4.2.7 Air Delivery System 4.2.8 Report 4.3 Service Re-commissioning Parts Lists Fault Finding Guide Replacement Parts 7.1 Burner 7.2 Controller...
  • Page 5 Introduction Welcome to the Suspended Oil fired Unit Heater Range. Local regulations may vary in the country of use and it is the installers responsibility to ensure that such regulations are satisfied All installation, assembly, commissioning and service procedures must be carried out by suitable qualified competent persons to the statutory regulations in the country of use.

  • Page 6: Installation Requirements

    Installation Requirements 1.1 Compliance notices The Suspended Oil fired 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 modification of then appliance to the conditions of use for the country.

  • Page 7: Certificates Of Conformity

    The Suspended Oil fired 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 Specifications BS EN 60204-1 Safety of Machinery - Electrical Equipment for Machines Specification for General Requirements BS EN 60335-1...

  • Page 8: Delivery And Pre-Installation Checks

    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 efficient distribution and circulation of warm air. •...

  • Page 9: Health And Safety

    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 •...

  • Page 10: Location / Positioning

    1.8 Location / Positioning All of the basic criteria must be satisfied prior to commencing installation and commissioning, additionally, the Suspended Oil fired Unit Heater must be positioned and installed so as to comply with all the relevant WARNING standards and guide lines (see section 1.1), as well as meeting national and local fire regulations and insurance criteria, especially if it is proposed that the heater is to be installed within a special risk area (e.g.

  • Page 11: Fuel Supply - General

    1.9 Fuel supply - general The Suspended Oil fired Unit Heater range are all manufactured and pre-set for use with either 28 second or 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.

  • Page 12: Single Pipe System (Gravity Feed)

    1.9.3 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.

  • Page 13: Electrical Supply

    It is advisable to check all pipe work prior to installation to ensure that there is no loose debris or scale present. Black iron pipes can be hammered to assist in the removal of these contaminants. The oil feed to each heater must be fitted with a fire check valve and isolating valve. Any waste oil or sludge must be disposed of correctly.
  • Page 14 Burner oil pump details for heater models 30 - 180 oil lines L metres H(m) 8mm I.D 10mm I.D 35.0 100.0 30.0 100.0 25.0 100.0 20.0 90.0 15.0 70.0 30.0 20.0 Burner oil pump details 205 - 375 suction feed Pressurised oil feed system Page 14...

  • Page 15: Air Supply

    1.11 Air supply Consideration must be given to the provision of air for the purposes of combustion and ventilation of the heated space, plant room or enclosure where heaters are to be installed. It is a requirement that the area where the air heater is located must have a permanent air vent of negligible resistance direct to the outside air.

  • Page 16: Mechanical Ventilation To The Heated Space

    1.11.1.2 Mechanical Ventilation to the Heated Space. 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.

  • Page 17: Air Distribution System

    In the event that the installer prefers to mechanically ventilate the plant room or Mechanical Ventilation enclosure rather than provide ventilation openings then:- Rate for Plant Room or Enclosure The plant room or enclosure needs to be mechanically ventilated at the rate of 4.14 m3/h of fresh Model M³/h air per kW or rated heat input.
  • Page 18 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. The condensate pipe from the flue to the disposal point must be made from corrosion resistant pipe of not less than the internal diameter of the drain pipe. 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.

  • Page 19: Dimensions

    1.14 Dimensions Page 19...
  • Page 20 Page 20...

  • Page 21: Technical Details

    1.15 Technical Details kW/hr 39.09 58.79 70.45 85.90 100.98 High Fire 133,380.62 200,599.81 240,385.38 293,102.97 344,543 Heat Output (max) kW/hr 31.38 47.28 57.93 59.30 79.34 Low Fire 107,073.00 161,326.06 197,665.36 202,340.00 270,721 kW/hr 46.01 68.34 84.19 99.95 119.59 High Fire 156,992.64 233,185.76 287,268.20...

  • Page 22: Reference Information

    1.15.1 Reference Information Doc/Ref Title/Subject BS 5410-1 & -2 Code of Practice for Oil firing BS EN 292-1 &-2 Safety of Machinery BS EN 60204-1 Safety of Machinery - Electrical BS EN 60335-1 Safety of Electrical Appliances BS EN 55014 Electromagnetic Compatibility BS EN 50165 Safety of Electrical Equipment...

  • Page 23: Installation

    Installation It is strongly advised that the installer reads Section 1 of this manual prior to starting any installation work. It is a requirement that only qualified and competent personnel undertake installation, commissioning, and servicing. Always ensure that the appropriate personal protective equipment is used. WARNING 2.1 Packaging/siting Model...

  • Page 24: Flue Installation

    2.5 Flue Installation An integral flue spigot is fitted to all the Suspended Oil fired Unit Heater thereby allowing the flue to connect directly to the heater. The design of the flue must ensure that it can be disconnected to allow for cleaning and servicing, furthermore, all of the flue section joint sockets must face upwards, and the seal between the sections achieved through mechanical joints or through the use of approved caulking string and grout.
  • Page 25 Wiring diagram 7365021 OUHEC 60-100 Hi Lo Riello Oil Burner 12 Way Terminal Block In Heater - 230/50/1ph For Interconnections See Drawing: 7365025 for optional SMARTCOM MZ control panel wiring. 7365026 for optional NO control panel wiring 1.5 BN 1 1.5 LB 2 1.5 GN/Y 1.5 Y4...
  • Page 26 Wiring diagram 7365022 OUHEA 90-100 Hi Lo Riello Oil Burner 12 Way Terminal Block In Heater - 230/50/1ph For Interconnections See Drawing: 7365025 for optional SMARTCOM MZ control panel wiring. 7365026 for optional NO control panel wiring 1.5 BN 1 1.5 BL 2 1.5 GN/Y 1.5 Y4...
  • Page 27 Wiring diagram 7365023 OUHAE 60-70 Hi Lo Riello Oil Burner 230/50/1ph 12 Way Terminal Block In Heater - For Interconnections See Drawing: 7365025 for optional SMARTCOM MZ control panel wiring. 7365026 for optional NO control panel wiring 1.5 BN 1 1.5 BL 2 1.5 GN/Y 1.5 Y4...
  • Page 28 Wiring diagram 7365024 OUHEA/OUHEC 40 Hi Lo Riello Oil Burner 12 Way Terminal Block In Heater - 230/50/1ph For Interconnections See Drawing: 7365025 for optional SMARTCOM MZ control panel wiring. 7365026 for optional NO control panel wiring 1.5 BN 1 1.5 BL 2 1.5 GN/Y 1.5 Y4...
  • Page 29 Wiring diagram 7365025 OUHE Hi Lo Riello Oil Burner Smartcom MZ Interconnection 230/50/1ph Page 29...
  • Page 30 Wiring diagram 7365025 OUHE Hi Lo Riello Oil Burner Smartcom MZ Interconnection 230/50/1ph Page 30...

  • Page 31: Commissioning

    Commissioning It is a requirement that only suitably qualified and competent personnel are allowed to undertake the commissioning of the heater. WARNING It is also strongly recommended that prior to commissioning the engineer familiarises himself with; the information contained within the information pack that accompanies the heater, the heater itself, and with the specific requirements of the installation /application.

  • Page 32: Commissioning - Ignition

    3.2 Commissioning - Ignition It is strongly recommended that the separate manual concerning the operational details of the burner supplied with the heater as Burner Sequence CAUTION part of the information package is studied prior to commissioning. Interval Operation Time intervals within the ignition sequence will vary slightly from one 1 <5s Combustion air damper actuated, burner fan motor initiates purge cycle.

  • Page 33: Commissioning - Air Delivery System

    Note (iii) All unit Heaters are test fired and pre-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.

  • Page 34: Servicing

    Servicing Servicing must be carried out on a regular basis, the maximum interval between services being 1 year. In certain applications the frequency of servicing will have to be increased , this to a large extent is governed by the working environment. CAUTION It is a requirement that only suitably qualified and competent persons are allowed to undertake servicing.

  • Page 35: Main Fan

    4.2.2 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.

  • Page 36: Burner

    4.2.6 Burner Service requirements for the burner fitted to the unit heater are covered in the separate manual prepared by the burner manufacturer. It is most important that the burner is serviced regularly and in accordance with the manufacturers instructions. 4.2.7 Air Delivery System A visual inspection should be undertaken to ensure that the air delivery system is in good order, that it remains adequately supported and that the various joints are effectively sealed.

  • Page 37: Parts Lists

    Parts Lists Item Heater Size /Description Burner 35s 29-99-602 RG1RKD 29-99-603 RG2D 29-99-603 RG2D 29-99-604 RG3D 29-99-604 RG3D Burner 28s 29-99-602 RG1RKD 29-99-603 RG2D 29-99-603 RG2D 29-99-604 RG3D 29-99-604 RG3D Burner Gasket 3005787 3005795 3005795 3005813 3005813 Nozzle 35s 27-00-437 27-00-020 27-00-430 27-00-436...
  • Page 38 Item Heater Size / Description MCB 16A OUHC 28-07-086 28-07-086 28-07-086 28-07-086 Contactor OUHC 28-11-137 28-11-137 29-11-137 28-11-137 Limit Thermostat 73-65-005-S 73-65-005-S 73-65-005-S 73-65-005-S 73-65-005-S Fan Control Relay 28-16-059 28-16-059 28-16-059 28-16-059 28-16-059 Fan/Limit Thermostat Gasket 20-45-589 20-45-589 20-45-589 20-45-589 20-45-589 Secondary Limit Thermostat 28-16-058...

  • Page 39: Fault Finding Guide

    Fault Finding Guide No Power Check isolator Check fuse Burner lockout Burner fails to run Fan/limit thermostat Room stat Check controls Timer No Demand Heat/vent switch On/off switch Check that head of Fuel feed incorrect Check oil pressure is correct gravity is sufficient Check that suction lift is not too great...
  • Page 40 Air/fuel mix Adjust air damper ratio incorrect Check for air in fuel line Burner gives a Too much air Check nozzle sparky flame Check filter Check fuel lines Fuel feed restricted Check valves Check oil pressure Insufficient Check air damper combustion air Check nozzle Check if correctly fitted...
  • Page 41 Foreign matter in fan Check burner fan motor Worn/dry bearings Insecure burner fan Burner giving Suction lift too great excessive noise Water in fuel line Fuel feed restriction Check burner oil pump Adjust warm air Warm air short circuit discharge/cool air inlet Check for high resistance accordingly.

  • Page 42: Replacement Parts

    Replacement Parts It is recommended that only suitably competent persons are allowed to undertake replacement of parts. 7.1 Burner • Disconnect electrical supply to the heater and shut off oil supply. • Disconnect fuel line. • Open the controls compartment door. •...

  • Page 43: Nozzle

    7.4 Nozzle • Disconnect electrical supply. • Open the controls compartment door. • Remove the oil fired burner cover. • Using an 13mm spanner, remove the nut holding the unit to the burner flange. • Withdraw the burner from the throat of the heat exchanger. •...

  • Page 44: Contactor

    7.7 Contactor • Disconnect electrical supply to the heater. • Open the controls compartment door. • The contactor and overload are located on the electrical panel plate situated on the right hand side of the unit. • Disconnect all wiring to the to the contactor noting which cables are connected to which terminals •...

  • Page 45: Axial Fan

    7.10 Axial Fan The axial fan is removed form the rear of the heater (opposing side to the outlet). Ensure there is enough room to work in and to withdraw the fan blower. • Disconnect electrical supply. • Open the controls compartment door. •...
  • Page 46 Notes Page 46...

  • Page 47: User Instructions

    User Instructions 8.1 Commissioning and hand over As part of the commissioning programme, the commissioning engineer must go through the following with the operator. WARNING (i) Lighting, shutdown, and operational information. (ii) Safety features, data plate, and labelling. (iii) The requirement for regular inspection - especially if the heater is within a more demanding environment - and the need for regular servicing, carried out by competent and qualified engineers.

  • Page 48: Stop Procedure

    United Kingdom AFFIX AGENTS DETAILS HERE Tel: +44 (0) 1384 489 250 Fax: +44 (0) 1384 489 707 Email: reznorsales@nortek.com Registered in England No˚ 1390934 www.reznor.eu/ Registered Office: The Colmore Building, 20 Colmore Circus Queensway, Birmingham, West Midlands, B4 6AT...

This manual is also suitable for:

Ouh 40Ouh 60Ouh 70Ouh 90Ouh 100

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