Space-Ray LRU15 Installation And Operation Instruction Manual
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Space-Ray LRU15 Installation And Operation Instruction Manual

Overhead radiant tube heaters
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INSTALLATION AND OPERATION INSTRUCTIONS
Models: LRU15, LRU25, LRU30, LRU35, LRU40, LRU45,
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
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
May 2021

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  • Page 1 INSTALLATION AND OPERATION INSTRUCTIONS OVERHEAD RADIANT TUBE HEATERS Models: LRU15, LRU25, LRU30, LRU35, LRU40, LRU45, LRL15, LRL25, LRL30, LRL35, LRL40, LRL45 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 ............................8 7.0) Dimensions – U Tube Configurations .................... 14 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

    Fan Air Restrictor Plate PN 42741010 PN 42741010 Radiant Baffle PN 44537000 Electrical Supply 230V~50Hz 125W Fuse Externally Dimensions LRU15: 3.10m x 0.465m LRL 15 5.493m x 0.34m Weight LRU15: 31kg LRL 15 27kg Gas Connection R - ½ Flue Size Ø100mm...
  • 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 Injector No. 19 No. 34 Burner Baffle Plate PN 4260360D (9) PN 4260360D Fan Air Restrictor Plate...
  • 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 Injector Ø 5.0mm Ø 3.3mm Burner Baffle Plate PN 4260360S PN 4260360S Fan Air Restrictor Plate...

  • Page 9: Packing List

    0.0242 25-35 225-275 LRU/LRL 45 L 0.0243 25-35 225-275 6.0) PACKING LIST LRU15 The appliances are supplied as follows:- Table 8 PART NO. MODEL LRU15 Carton (containing the following) Fastenings Pack Burner Box Assembly 44438040 Fan Assembly – 3” (w/36.5mm air plate)
  • Page 10 LRU25 The appliances are supplied as follows:- Table 9 PART NO. MODEL LRU25 Carton (containing the following) Fastenings Pack Burner Box Assembly 44438000 Fan Assembly – 3” (less air plate) 42764000 U-Bend 42773000 Hanger Bracket 42770000 U-Bolt (included in fastenings pack) 30462990 Torctite Coupling 42766000...
  • Page 11 LRU30/35 LRU40/45 The appliances are supplied as follows:- Table 10 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 The appliances are supplied as follows:- Table 10b 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 13 LRL25 The appliances are supplied as follows:- Table 11 PART NO. MODEL LRL25 Carton (containing the following) Fastenings Pack Burner Box Assembly 44438000 Fan Assembly – 3” (less air plate) 43318000 Hanger Brackets 42770000 U-Bolts (included in fastenings pack) 30462990 Torctite Coupling 42766000 Radiant Tube (Ø...
  • Page 14 LRL30/35 LRL40/45 The appliances are supplied as follows:- Table 12 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: Dimensions - U Tube Configurations

    7.0) DIMENSIONS – U TUBE CONFIGURATIONS Fig. 8 Fig. 9 Form #44201110 -14- May 2021...
  • Page 16 Fig. 10 Fig. 10a LRU30/35 with OPTIONAL 3m Extension Form #44201110 May 2021 -15-...
  • Page 17 Fig. 11 Fig. 11a LRU40/45 with OPTIONAL 3m EXTENSION Form #44201110 -16- May 2021...

  • Page 18: Heater Assembly Overview - U Tube Configurations

    7.1 HEATER ASSEMBLY OVERVIEW – U TUBE CONFIGURATIONS Fig. 12 Form #44201110 May 2021 -17-...
  • Page 19 Fig. 13 Form #44201110 -18- May 2021...
  • Page 20 Fig. 14 Form #44201110 May 2021 -19-...
  • Page 21 Fig. 14a Form #44201110 -20- May 2021...
  • Page 22 Fig. 15 Form #44201110 May 2021 -21-...
  • Page 23 Fig. 15a Form #44201110 -22- May 2021...

  • Page 24: Dimensions - Linear Tube Configurations

    8.0) DIMENSIONS – LINEAR TUBE CONFIGURATIONS Fig. 16 Form #44201110 May 2021 -23-...
  • Page 25 Fig. 16a LRL30/35/40/45 with OPTIONAL 3m EXTENSION Form #44201110 -24- May 2021...

  • Page 26: Heater Assembly Overview - Linear Tube Configurations

    8.1) HEATER ASSEMBLY OVERVIEW - LINEAR TUBE CONFIGURATIONS Fig. 17 Form #44201110 May 2021 -25-...
  • Page 27 Fig. 17a Form #44201110 -26- May 2021...
  • Page 28 Fig. 18 Form #44201110 May 2021 -27-...
  • Page 29 Fig. 18a Form #44201110 -28- May 2021...
  • Page 30 Fig. 19 Form #44201110 May 2021 -29-...
  • Page 31 Fig. 19a Form #44201110 -30- May 2021...

  • Page 32: Typical Suspension Methods

    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 33: Burner Box Support Details (Optional)

    Fig. 20 Fig. 21 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 34: 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. 23 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 35 Failure to assemble the tube with the seam facing down will void the manufacturer’s warranty. SPECIAL INSTRUCTIONS FOR MODEL LRU15 ONLY 16. Place the radiation baffle over the tube support/hanger brackets as shown below in Fig. 23a. Secure these to the support/hanger brackets using (2) of the #8-32 screws and nuts supplied in the Fastenings Pack of the heater as shown in Fig.

  • Page 36: 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 37: 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. 26 Important: NEVER reuse a coupling. Always install a new coupling only and torque as per instructions above and the diagrams above.
  • Page 38 Fig. 27 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 39: 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 40: Attaching Burner Box Assembly

    10.4) ATTACHING BURNER BOX ASSEMBLY Fig. 30 Fig. 31 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 41: Attaching Fan Assembly

    10.5) ATTACHING FAN ASSEMBLY Fig. 32 Fig. 33 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 42 This appliance is equipped with a step-opening, combination gas valve. The maximum supply pressure to the appliance is 60 mbar. If the line pressure is more than the maximum supply pressure, then a second stage regulator which corresponds to the supply pressure must be used. After all gas connections have been made, make sure the heater and all gas outlets are turned off before the main gas supply is turned on slowly.

  • Page 43: 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 44 DO NOT EXCEED THE PRESSURES SHOWN IN THE GAS PRESSURE TABLE ABOVE 2. After testing pressure and adjusting the regulator, turn off all electrical power to the system, remove manometer tubes, turn OUTLET test screw clockwise to seal pressure port. Tighten to 1.0 Nm torque minimum.

  • Page 45: 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 46 Multiple Heaters per Thermostat connection diagram Fig. 40 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 47: 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 48 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 49 Fig. 42 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 50 Fig. 43 Form #44201110 May 2021 -49-...
  • Page 51 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 52: 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. 45 15.0) HEATER OPERATION Form #44201110 May 2021 -51-...

  • Page 53: Sequence Of Operation

    15.1) SEQUENCE OF OPERATION The chart below shows the sequence of operation for the normal operating cycle. Fig. 46 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 54: 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 55 • 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 56: Troubleshooting Guide

    17.0) TROUBLESHOOTING GUIDE Form #44201110 May 2021 -55-...
  • Page 57 Form #44201110 -56- May 2021...

  • Page 58: 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 59: Removing Main Burner

    18.2) REMOVING MAIN BURNER Fig. 48 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 60: Removing Ignition Control

    18.4) REMOVING IGNITION CONTROL Fig. 50 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 61: Removing Gas Valve And Manifold Assembly

    18.6) REMOVING GAS VALVE AND MANIFOLD ASSEMBLY Fig. 52 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 62: Removing Air Inlet Plate

    18.8) REMOVING AIR INLET PLATE Fig. 54 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. 55 1. Disconnect the electrical wires from the fan (see Section 13.0) for connection details. 2.

  • Page 63: 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 64: 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 65 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 -64- May 2021...
  • Page 66 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.

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