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Space-Ray LRU60 Installation & Operation Instructions

Overhead radiant tube heaters
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INSTALLATION AND OPERATION INSTRUCTIONS
Models: LRU15, LRU25, LRU30, LRU35, LRU40, LRU45, LRU60
OWNER / INSTALLER: For your safety this manual must be carefully and thoroughly read and understood before
installing, operating or servicing this heater. This heater is intended for use with either Natural Gas or Propane
Gas. It must be installed by a qualified service person or a licensed contractor in accordance with state and local
codes.
▲WARNING: Improper installation, adjustment, alteration, service, or maintenance can cause property damage,
injury or death. Read the installation, operation and maintenance instructions thoroughly before installing or
servicing this equipment. For assistance or additional information, consult a qualified installer, service agency or
the gas supplier.
INSPECT all combustion air openings into the building and, if necessary, clear if they become blocked.
FOR YOUR SAFETY: If the heater is installed without a flue, exhaust fans MUST be operating on an appropriate
cycle when heaters are operating to avoid a high concentration of carbon monoxide. When used without fresh
air, this heater may give off carbon monoxide, an odorless and poisonous gas. CARBON MONOXIDE POISONING
MAY LEAD TO DEATH. Early signs of carbon monoxide poisoning resemble the flue with headaches, dizziness and
nausea. If you experience these signs, GET FRESH AIR IMMEDIATELY! Have the heaters serviced as soon as
possible and check the ventilation into the building.
!INSTALLER: This manual is the property of the owner. Please present this manual to the owner when you leave
the job site.
IF YOU SMELL GAS:
! DO NOT try to light any appliance.
! DO NOT touch any electrical switch; DO NOT use any
telephone in your building.
! IMMEDIATELY call your gas supplier from a neighbor's
telephone. Follow the gas supplier's instructions. If you
cannot reach your gas supplier, call the fire department.
!IMPORTANT: SAVE THIS MANUAL FOR FUTURE REFERENCE.
Phone 01473 830551 Fax: 01473 832055 E-mail:
OVERHEAD RADIANT TUBE HEATERS
LRL15, LRL25, LRL30, LRL35, LRL40, LRL45, LRL60
Single Stage Pull Through System (Negative Pressure)
FOR YOUR SAFETY
Gas Fired Products (UK) Ltd.
Chapel Lane, Claydon, Ipswich, Suffolk IP6 0JL, England
DO NOT store or use gasoline or other
flammable vapors and liquids in the vicinity of
this or any other appliance.
info@spaceray.co.uk www.spaceray.com.uk
Form #44201110
Oct 2024

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  • Page 1 INSTALLATION AND OPERATION INSTRUCTIONS OVERHEAD RADIANT TUBE HEATERS Models: LRU15, LRU25, LRU30, LRU35, LRU40, LRU45, LRU60 LRL15, LRL25, LRL30, LRL35, LRL40, LRL45, LRL60 Single Stage Pull Through System (Negative Pressure) OWNER / INSTALLER: For your safety this manual must be carefully and thoroughly read and understood before installing, operating or servicing this heater.

  • Page 2: Table Of Contents

    TABLE OF CONTENTS SECTION DESCRIPTION PAGE 1.0) SAFETY ..............................2 2.0) INSTALLER RESPONSIBILITY ......................2 3.0) GENERAL INFORMATION ........................2 4.0) MINIMUM CLEARANCES TO COMBUSTIBLES ................. 4 5.0) SPECIFICATIONS ..........................5 6.0) PACKING LIST ............................. 9 7.0) DIMENSIONS – U TUBE CONFIGURATIONS .................. 15 HEATER ASSEMBLY OVERVIEW –...

  • Page 3: Safety

    Ventilation requirements are addressed further in these instructions. Although these heaters may be used in many applications other than space heating (e.g., process heating), Space-Ray will not recognize the warranty for any use other than space heating. Form #44201110...
  • Page 4 This heater is not an explosion proof heater. Where the possibility of exposure to volatile and low flash point materials exists, it could result in property damage or death. This heater must not be installed in a spray booth where the heater can operate during the spraying process. Consult your local fire marshal or insurance company. Linear Configuration Series Only: Since linear configuration tube heaters are always hotter at the control end than at the flue terminal end, always observe the minimum recommended mounting heights.

  • Page 5: Minimum Clearances To Combustibles

    NFPA54 requires that the installer must post signs that will “specify the maximum permissible stacking height to maintain the required clearances from the heater to combustibles.” Space-Ray recommends posting these signs adjacent to the heater thermostat or other suitable location that will provide enhanced visibility.

  • Page 6: Specifications

    5.0) SPECIFICATIONS Table 2 MODEL LRU15/LRL15-N LRU15/LRL15-L Heat Input 15. kW Hs 13.5 kW Hi Appliance Type (II 2H3P Appliance Category 2H3P Adjusted for 2H G20 20mbar 3P G31 37mbar Setting Pressure 12.5mbar 25mbar Gas Consumption 1.43 m 1.08 kg/h Injector No.
  • Page 7 Table 4 MODEL LRU30/LRL30-N LRU30/LRL30-L Heat Input 29.2 kW Hs 26.3 kW Hi Appliance Type (II A2, B 2H3P Appliance Category 2H3P Adjusted for 2H G20 20mbar 3P G31 37mbar Setting Pressure 12.5mbar 25mbar Gas Consumption 2.86 m 2.15 kg/h Injector No.
  • Page 8 Table 6 MODEL LRU40/LRL40-N LRU40/LRL40-L Heat Input 42.2kW Hs 38.0kW Hi Appliance Type (II A2, B 2H3P Appliance Category 2H3P Adjusted for 2H G20 20mbar 3P G31 37mbar Setting Pressure 12.5mbar 25mbar Gas Consumption 3.81 m 2.87 kg/h Injector Ø 5.0mm Ø...
  • Page 9 Table 8 MODEL LRU 60/LRL 60-N Heat Input 60.0 kW Hs 54.0 kW Hi (minimum 48 kW Hs 43.2 kW Hi two-stage only) Appliance Type (II A2, B 2H3P Appliance Category Adjusted for 2H/2E G20 20mbar Setting Pressure 9.10mbar (minimum 5.2mbar two-stage) Injector “F”...

  • Page 10: Packing List

    6.0) PACKING LIST LRU15 The appliances are supplied as follows: Table 10 PART NO. MODEL LRU15 Carton (containing the following) Fastenings Pack Burner Box Assembly 44438040 Fan Assembly – 3” (w/36.5mm air plate) 42764000 U-Bend 42773000 Hanger Bracket 42770000 U-Bolt (included in fastenings pack) 30462990 Torctite Coupling 4250636...
  • Page 11 LRU25 Fig. 4 LRU30/35 LRU40/45 The appliances are supplied as follows: Table 12 PART NO. MODEL LRU30 LRU35 LRU40 LRU45 Carton (containing the following) Fastenings Pack Burner Box Assembly 44438020 Fan Assembly – 4” (w/76.2mm air plate) 44438030 Fan Assembly – 4” (less air plate) 42913000 U-Bend 42898000...
  • Page 12 LRU30, 35, 40, 45 Fig. 5 LRU60 The appliances are supplied as follows: Table 12b PART NO. MODEL LRU 60 Carton (containing the following) Fastenings Pack Burner Box Assembly 44438260 Fan Assembly – 4” (less air plate) 42913008 U-Bend 42898000...
  • Page 13 LRL15 The appliances are supplied as follows: Table 12c PART NO. MODEL LRL15 Carton (containing the following) Fastenings Pack Burner Box Assembly 44438040 Fan Assembly – 3” (w/31mm air plate) 43318000 Hanger Brackets 42770000 U-Bolts (included in fastenings pack) 30462990 Torctite Coupling 42766000 Radiant Tube (Ø...
  • Page 14 LRL25 Fig. 8 LRL30/35 LRL40/45 The appliances are supplied as follows: Table 14 PART MODEL LRL30 LRL35 LRL40 LRL45 Carton (containing the following) Fastenings Pack Burner Box Assembly 44438020 Fan Assembly – 4” (76.2mm air plate) 44438030 Fan Assembly – 4” (less air plate) 43318000 Hanger Brackets 42873000...
  • Page 15 LRL30, 35, 40, 45 Fig. 9 LRL60 The appliances are supplied as follows: Table 15 PART NO. MODEL LRL 60 Carton (containing the following) Fastenings Pack Burner Box Assembly 44438260 Fan Assembly – 4” (less air plate) 43318000 Hanger Brackets 42770000 U-Bolts (included in fastenings pack) 30462980...

  • Page 16: Dimensions - U Tube Configurations

    7.0) DIMENSIONS – U TUBE CONFIGURATIONS Fig. 11 Fig. 12 Form #44201110 Oct 2024 -15-...
  • Page 17 Fig. 13 Fig. 13a LRU30/35 with OPTIONAL 3m Extension Form #44201110 -16- Oct 2024...
  • Page 18 Fig. 14 Fig. 14a LRU40/45 with OPTIONAL 3m EXTENSION Form #44201110 Oct 2024 -17-...
  • Page 19 Fig. 15 LRU 60 Form #44201110 -18- Oct 2024...

  • Page 20: Heater Assembly Overview - U Tube Configurations

    7.1 HEATER ASSEMBLY OVERVIEW – U TUBE CONFIGURATIONS Fig. 16 Form #44201110 Oct 2024 -19-...
  • Page 21 Fig. 17 Form #44201110 -20- Oct 2024...
  • Page 22 Fig. 18 Form #44201110 Oct 2024 -21-...
  • Page 23 Fig. 18a Form #44201110 -22- Oct 2024...
  • Page 24 Fig. 19 Form #44201110 Oct 2024 -23-...
  • Page 25 Fig. 19a Form #44201110 -24- Oct 2024...
  • Page 26 Fig. 20 Form #44201110 Oct 2024 -25-...

  • Page 27: Dimensions - Linear Tube Configurations

    8.0) DIMENSIONS – LINEAR TUBE CONFIGURATIONS Fig. 21 Form #44201110 -26- Oct 2024...
  • Page 28 Fig. 21a LRL30/35/40/45 with OPTIONAL 3m EXTENSION Form #44201110 Oct 2024 -27-...

  • Page 29: Heater Assembly Overview - Linear Tube Configurations

    8.1) HEATER ASSEMBLY OVERVIEW - LINEAR TUBE CONFIGURATIONS Fig. 22 Form #44201110 -28- Oct 2024...
  • Page 30 Fig. 22a Form #44201110 Oct 2024 -29-...
  • Page 31 Fig. 23 Form #44201110 -30- Oct 2024...
  • Page 32 Fig. 23a Form #44201110 Oct 2024 -31-...
  • Page 33 Fig. 24 Form #44201110 -32- Oct 2024...
  • Page 34 Fig. 24a Form #44201110 Oct 2024 -33-...

  • Page 35: Typical Suspension Methods

    Fig. 25 9.0) TYPICAL SUSPENSION METHODS Not with standing their limited scope, the appliance should be installed in accordance with the relevant provisions of any National Gas Safety (Installation and Use) Regulations. Due account should also be taken of any obligations arising from any National Health and Safety at Work Regulations, National and Local Building Regulations and National Electrical Wiring Regulations.
  • Page 36 The appliance should be located with respect to building construction and other equipment to permit access to the appliance for servicing etc. Space-Ray recommends that the body sections be suspended using chains with turnbuckles. This will allow slight adjustments after assembly and heater expansion/ contraction during operation.

  • Page 37: Burner Box Support Details D (Optional For 101.6Mm Controls)

    Fig. 26 Fig. 27 9.1) BURNER BOX SUPPORT DETAILS D (OPTIONAL FOR 101.6MM CONTROLS) 76.2mm diameter tubes The burner control box for must be supported with a welded chain after overall heater suspension is complete. This is to prevent the burner control box from sagging which may cause the tube to burn out prematurely.

  • Page 38: User Instruction Label

    9.2) USER INSTRUCTION LABEL The User Instruction label shown below is supplied with each heater. Affix this label adjacent to low level user controls, such as thermostats, time clocks or control panels. Fig. 29 10.0) TYPICAL HEATER ASSEMBLY See heater dimensions and assembly overview (Sections 7.0 through 8.1) for each U-model and Linear model configurations.
  • Page 39 12. Secure reflectors to tube support/hanger brackets using the screws and clamps (supplied in fastening kits). Note: Refer to details A or B of each assembly overview drawing for the required open or closed positions of the clamps. These positions enable reflectors to side or remain stationary during operation of heater. 13.

  • Page 40: Tube Coupling Details

    10.1) TUBE COUPLING DETAILS Join the tube sections together and secure with tube couplings as described below. Note: The heater tube section should be provided a slope of 0.25 degree up to the fan. 1. Place the compression coupling over the end of the tube. 2.

  • Page 41: Inserting Turbulators

    Once all the heater body sections are attached, make sure that the heater system is level. If it is not, slight adjustments can be made using the turnbuckles. (See Section 9.1) Fig. 33 Important: NEVER reuse a coupling. Always install a new coupling only and torque as per instructions above and the diagrams above.
  • Page 42 Fig. 34 Table 13 U-Model Linear Model Heaters Heaters MODEL Turbulator Sections Burner Leg Fan Leg Fan End LRL 15 65mm x 572mm LRU 15 65mm x 572mm LRL 25 65mm x 572mm LRU 25 65mm x 572mm LRL 30 90mm x 610mm 90mm x 610mm LRU 30...

  • Page 43: Attaching U-Bend

    10.3) ATTACHING U-BEND U-Bend (76.2mm Tubes) 1. Assemble the U-Bend to the tubes with the two (2) threaded holes facing downwards, ensuring that the tubes engage fully. 2. Using two (2) 5/16” BSW hexagon socket setscrews (from fastening pack) secure the U-Bend to the radiant tubes.

  • Page 44: Attaching Burner Box Assembly

    10.4) ATTACHING BURNER BOX ASSEMBLY Fig. 37 Fig. 38 Place a Torctite Coupling over the end of the Radiant Tube (refer to Section 10.1 “Tube Coupling Details”). Assemble the Burner Box to the Radiant Tube ensuring that it engages fully into the Torctite Coupling and is positioned vertically.

  • Page 45: Attaching Fan Assembly

    10.5) ATTACHING FAN ASSEMBLY Fig. 39 Fig. 40 Place a Torctite Coupling over the end of the Radiant Tube (refer to Section 10.1 “Tube Coupling Details”). Assemble the Fan Assembly to the Radiant Tube and position the fan outlet pointing upwards for flueless applications.
  • Page 46 The gas pipe, flexible hose and connections must be self-supporting. The gas pipe work must not bear any of the weight of the heater or any other suspended assembly. This appliance is equipped with a step-opening, combination gas valve. The maximum supply pressure to the appliance is 60 mbar.

  • Page 47: Instructions For Pressure Test Gauge Connection

    12.0) INSTRUCTIONS FOR PRESSURE TEST GAUGE CONNECTION CHECKING GAS PRESSURES Switch off the gas and electricity and gas supply to the appliance. NOTE: Turn off manual shutoff at gas line otherwise gas comes out. Connect a manometer to the test nipple protruding from the rear panel of the Control Box (adjacent to the Air Inlet Adaptor).
  • Page 48 TO ADJUST REGULATOR (single stage gas valves): In the event that the burner setting pressure is incorrect, remove the plug from the control box door and insert a suitable screwdriver through the exposed hole in the box to adjust the pressure. See Error! Reference source not found.45.
  • Page 49 After setting put back the modulator plastic cap. Reconnect pressure regulator connection (if used). WARNING: To ensure the correct operation of the modulator it is necessary that the plastic cap A is returned to its original location. DO NOT EXCEED THE PRESSURES SHOWN IN THE GAS PRESSURE TABLE 4.

  • Page 50: Electrical Connections

    13.0) ELECTRICAL CONNECTIONS The electrical wiring to this heater must be installed in accordance with the latest or current National Regulations and any Local Regulations, which apply. Electrical supply 230V~50Hz 125W Current rating 0.55 Fuse externally 1. Using a suitable cable connector and twin core and earth PVC covered flexible supply cable, (0.5 mm National or Local standard specification) connect the fan leads to the 3 pin plug provided (fastenings pack) as follows:- Brown (red)
  • Page 51 Multiple Heaters per Thermostat connection diagram Fig. 48 Notes: The method of connection to the electrical supply must facilitate complete isolation and should preferably be via a fused double pole isolator having a constant separation of at least 3mm in all poles and supplying the appliance ONLY.
  • Page 52 Internal Wiring Diagram - Two Stage Controls Fig. 49a Form #44201110 Oct 2024 -51-...

  • Page 53: Venting And Fresh Air For Combustion

    14.0) VENTING AND FRESH AIR FOR COMBUSTION These appliances may be installed with an exhaust flue fitted or without an exhaust flue fitted. A. FLUELESS (UNFLUED) The installation room should have a volume of at least 10m/m kw of installed nominal heat input of the radiant heater.
  • Page 54 VENTILATION BY NATURAL AIR CHANGE Gas-fired radiant heaters may be operated without any special exhaust system if the exhaust gases are discharged to the outside atmosphere by a sufficient natural air change in the installation room. Furthermore, no provision for thermal or mechanical ventilation is required in the following particular cases: Buildings with natural air change greater than 1.5 volumes per hour Buildings with a density of operating heat input not greater than 5W/m AIR SUPPLY...
  • Page 55 Fig. 50 14.1 Type A Outside (ducted) combustion air supply. When installed in a dusty or polluted atmosphere, the heater should be fitted with a ducted supply of clean fresh air. A length of 100mm flexible ducting should be installed between the Control Box Air Inlet and any rigid ducting and be secured to the Air Inlet with hose clips.
  • Page 56 Fig. 51 Form #44201110 Oct 2024 -55-...
  • Page 57 14.4 TypeC The following figure shows the typical arrangements for concentric vertical flues, see table 12 for 90° bend equivalent lengths. The bends shown in the illustrations connecting the combustion air intake to the concentric ducts is calculated into the overall length. For example a system with one additional 150/100mm Ø...

  • Page 58: Heater Operation

    Type C fresh air connector 14.6 The connectors for the Type C fresh air are supplied as an accessory. The installation steps for the Type C connector are shown in figure 45 below. Fig. 53 15.0) HEATER OPERATION Form #44201110 Oct 2024 -57-...

  • Page 59: Sequence Of Operation

    15.1) SEQUENCE OF OPERATION The chart below shows the sequence of operation for the normal operating cycle. Fig. 54 If the flame is not sensed during sequence T3 then the heater will go to lockout. It is essential that all new pipework installations are purged and tested for soundness with a suitable leak detection fluid prior to attempting to ignite any appliance.

  • Page 60: Cleaning And Annual Maintenance

    16.0) CLEANING AND ANNUAL MAINTENANCE This heater must be cleaned and serviced annually by a qualified contractor before the start of each heating season and at any time excessive accumulation of dust and dirt is observed. Maximum heating efficiency and clean combustion will be maintained by keeping the heater clean.
  • Page 61 • Main Burner and Orifice: Check the Main burner and orifice; remove any dirt or debris including spider webs. See Sections 19.2 and 19.3 . • Electrical Wiring: Check that all the electrical connections are sound and that the wiring is undamaged. Replace damaged wires as necessary.

  • Page 62: Troubleshooting Guide

    17.0) TROUBLESHOOTING GUIDE Form #44201110 Oct 2024 -61-...
  • Page 63 Form #44201110 -62- Oct 2024...

  • Page 64: Replacing Parts

    18.0) REPLACING PARTS Only use genuine Space-Ray replacement parts. Parts are available from the factory for replacement by a licensed person. Refer to the Replacement Parts Guide in Section 21.0) for all replacement parts. IMPORTANT: Disconnect gas and electricity supplies to the appliance before carrying out any repair work. This work can be carried out at high level using a purposes designed access tower, but it is preferable that this work should be carried out at ground level.

  • Page 65: Removing Main Burner

    18.2) REMOVING MAIN BURNER Fig. 56 1. Unscrew the two M4 x 25 setscrews from the Burner Bracket and remove the Burner Clamp. 2. Unscrew the Burner from the Injector Fitting 3. Lift the burner out of the Control Box. 4.

  • Page 66: Removing Ignition Control

    18.4) REMOVING IGNITION CONTROL Fig. 58 1. Remove the screws securing the cover panel to the Ignition Control Module. 2. Disconnect the 12 way Molex electrical connector and the white HT ignition spark/flame sensor lead from the Ignition Control. 3. Slide out the Ignition Control. 18.5) REMOVING AIR SWITCH Fig.

  • Page 67: Removing Gas Valve And Manifold Assembly

    18.6) REMOVING GAS VALVE AND MANIFOLD ASSEMBLY Fig. 60 1. Remove the screws securing the cover panel to the Ignition Control Module and disconnect the 12 way Molex electrical connector. 2. Disconnect the white HT ignition spark/flame sensor lead from the ignition module. 3.

  • Page 68: Removing Air Inlet Plate

    18.8) REMOVING AIR INLET PLATE Fig. 62 1. Disconnect tubing from both brass pressure test fittings. 2. Remove brass nut from pressure test fitting. 3. Disassemble components from the control box. 18.9) REMOVING THE FAN Fig. 63 1. Disconnect the electrical wires from the fan (see Section 13.0) for connection details. 2.

  • Page 69: Conversion Instructions

    19.0) CONVERSION INSTRUCTIONS CONVERSION FROM CAT. 2H (Natural Gas) TO CAT. 3P (LPG) Remove the Injector from the Injector Fitting (see Section 18.3) and replace it with the alternative Injector supplied with conversion kit. Check that the size reference marked on the Injector agrees with that listed in the Specifications table (Section 5.0) for the appliance model in question.

  • Page 70: Replacement Parts Guide

    21.0) REPLACEMENT PARTS GUIDE The following is a list of replacement parts which may be required during the life of the appliance. CONTROL COMPONENTS Description Item No. Part No. Qty. 02330010 Vinyl Cap 02331010 Plug, Liquid Tight Hole Inlet – Male Pin #PX0575 4262151 Outlet –...
  • Page 71 Part No. Qty. 4262036 Label Neon 4262035 Label, Fan/Power Supply 42604200 Label, Warning - GB/IE 43344120GB Label, Clearances to Combustibles 42848130GB Label, Nameplate 4260440 Label, Operating Instructions - GB 4262000 Label, Space-Ray Logo 44201110 Installation/Operation Manual Form #44201110 -70- Oct 2024...
  • Page 72 Fan Assembly – Models LRL/LRU 15, 25, 30, 35, 40, 45 Description Item No. Part No. Qty. Fan Unit – Torin-Sifan #DSF133-042 30742150 4260132 Gasket 42741010 Air Restrictor Plate (36.5mm dia. opening) Models LRL/LRU 15 none Air Restrictor Plate - Models LRL/LRU 25 42741170 Air Restrictor Plate (76.2mm dia.

  • Page 73: End Of Life Disposal Of This Appliance

    22.0) END OF LIFE DISPOSAL OF THIS APPLIANCE This product contains steel, aluminum and electronics and should be recycled at the end of its life cycle to save these materials. Please dispose of this equipment at your applicable collection point for the recycling of metals and electronic equipment waste.

  • Page 74: Lru/Lrl Product Passport

    23.0) LRU/LRL PRODUCT PASSPORT Form #44201110 Oct 2024 -73-...

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