SINGLE STAGE BTU/HR INPUT
MINIMUM MOUNTING HEIGHT**
BTU / HR HIGH INPUT
BTU / HR LOW INPUT
* Indicate model number based on Btu/hr input (e.g. 100,000 Btu/hr), emitter length (e.g. 30 ft.) . Control suffix (e.g. Natural Gas single stage input ) . The unit selection would be LTU100-30-N5.
** Minimum recommended mounting heights are intended as a guide only, as heaters may be mounted at various heights and angles. Mount heaters as high as possible. Minimums are shown as a guideline for human comfort and uniform enrgy distribution for complete building applications. Please consult your Space-Ray Representative for a detailed analysis of your particular heating requirements.
|Control Suffix||Type of Gas||Control Option Description|
|N5/ L5||Natural / Propane||Single Stage Gas Valve- Single Stage Input|
|N7 / L7||Natural / Propane||Two Stage Gas Valve- Modulating Input – High/Low Fire|
Floor Level Coverage – The above chart may be used as a guideline for primary radiation, i.e. the infrared pattern directly below the heater. In a well-insulated building, only 50% of the floor needs to be covered by the primary radiant pattern. Please be aware that the radiant energy generated by infrared heaters is not limited to the primary radiant pattern. There is additional radiant energy that is absorbed outside the primary area, a secondary radiant pattern. Since concrete is a very good conductor of heat, a reasonably uniform floor temperature eventually will be reached. The amount of time it takes to reach “thermal equilibrium” is in direct correlation to the distance between the heaters.
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Pull-Through System (negative pressure or vacuum)
- Pull-through system — the products of combustion are pulled through the combustion chamber for increased radiant efficiency and greater safety
- CSA certified for vertical or horizontal venting
- CSA certified for maximum 75 ft. horizontal sidewall venting
- 4″ O.D. flue connection for LTU40-LTU175; 6″ for LTU180-LTU250
- Draft inducer is equipped with permanently lubricated, totally enclosed, fan cooled and heavy duty ball bearing motor for maintenance free operation
- Draft inducer assembly can be used for through- the-roof-venting or rotated 45 degrees or 90 degrees for horizontal venting
- No draft hoods, totally enclosed combustion chamber
- One piece cast iron burner with stainless steel flame retainer
- 10 year limited warranty on burner
- Inside or optional outside air for combustion
- CSA certified for 50 ft. outside combustion air inlet duct
- 4″ O.D. standard fresh air inlet duct opening for LTU40-LTU75; 6″ for LTU80-LTU250
- Burner inspection sight glass
- State-of-the-art step opening combination gas valve for quiet ignition
- Diaphragm Air Proving Switch — a safety device for proof of venting before gas flow and ignition
- Spark ignition system with 100% Gas Shut-Off Safety Control (30 second pre-purge)
- 36″ Stainless Steel flexible gas connector included with control box
Radiant Emitter Tube System
- All radiant emitter tubes are 16 gauge calorized steel — 3″ for LTU40-LTU75 and 4″ for LTU80-LTU250
- Body assembly for some models is 15′ long; other models require the use of additional 5′ and 10′ body packages
- Titanium alloy Alumi-Therm and aluminized steel emitter tubes are calorized for long life and high radiant efficiency
- The calorization process (PDF)produces an emitter tube which is highly radiant absorptive on the interior and highly radiant emissive on the exterior
- 5 year limited warranty on the emitter tube
- Fully factory pre-assembled on tube body to minimize field filed assembly and save installation labor cost
- Highly efficient aluminum reflectors with reflectivity rating of 97%
- Reflector ends are enclosed for maximum radiant heat output and minimum convection loss
- Easy to use mounting brackets
- Suitable for horizontal or angle mount up to 45 degrees
- 3 Monitoring light system for on line diagnosis- power on, insufficient air flow, and ignition sytem operation
- Uncomplicated maintenance access
- Quick slip-on electrical connectors
- Quick 115 volt terminal block connection
- 1/2″ MPT gas inlet connection
- CSA approved for direct vented or indirect vented operation
- Optional deflector kit for reduced clearances to combustible materials
- Optional decorative grille kit for drop ceiling applications
- Optional side reflector kits
- CSA Certified according to ANSI Z83.20 and CSA 2.34. NOT Certified for Residential Use
|MODEL||INPUT BTU/HR||TOTAL TUBE LENGTH (FT)||OVERALL|
DIMENSION “L” (FT)
WIDTH “W” (IN)
HEIGHT “H” (IN)
|LTU40-30||40,000||30′||16′ 10″||18 1/2″||5 1/2″||138|
|LTU50-30||50,000||30′||16′ 10″||18 1/2″||5 1/2″||138|
|LTU60-30||60,000||30′||16′ 10″||18 1/2″||5 1/2″||138|
|LTU75-30||75,000||30′||16′ 10″||18 1/2″||5 1/2″||138|
** Hanging weight is 80% of shipping weight
|GAS TYPE||BURNER PRESSURE||MINIMUM SUPPLY PRESSURE||MAXIMUM SUPPLY PRESSURE||VOLTAGE||AMPS||IGNITION TYPE|
|NATURAL||3.5″ W.C.||5″ W.C.||14″ W.C.||120 VAC||2.6||DIRECT SPARK|
|PROPANE||10″ W.C.||11″ W.C.||14″ W.C.||60 HZ|
|NATURAL||3.5″ W.C.||7″ W.C.||14″ W.C.||120 VAC||2.6||DIRECT SPARK|
|PROPANE||10″ W.C.||12″ W.C.||14″ W.C.||60 HZ|
NOTE: For all installations higher than 2000 ft. above sea level please consult the factory regarding recommended derating of heaters.
* 7″ W.C. for Models 150-200
** 12″ W.C. for Models 200
NOTE:The clearances specified above must be maintained to combustibles and other materials that may be damaged by temperatures 90°F above ambient temperature. Clearances to combustibles are posted on the reflector near the control end of the heater. In locations used for storage of combustible materials where they may be stacked below the heater, NFPA 54 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”.
* When used indirect vented, clearance to CEILING must be: 12″ for LTU(40-75) and 18″ for LTU(80-250)
** Maximum clearance below reduces by 50% once you are 25ft. downstream from the burner box. Note: Consult Factory if reduced clearances are required
Heaters can be common vented, vented or indirect vented. A vented installation must be vented outside the building with a flue pipe. An indirect vented installation requires a minimum ventilation flow of 4 CFM per 1000 BTU/hour of total installed heater capacity on natural gas by either gravity or power ventilation (4.18 CFM per 1000 BTU/hour on propane).
Installation and service must be performed by a licensed contractor. The installation must conform to written Instalation & Operating Instructions and local codes. In the absence of local codes, the installation must conform with the National Fuel Gas code, ANSI Z223.1 (latest edition also known as NFPA54) or GCA B149 (latest edition) installation codes. These codes are available from the National Fire Protection Association, Inc., Batterymarch Park, Quincy, MA 02269 or the Canadian Gas Association, 55 Scarsdale Road, Toronto, Ontario M3B 2R3, CANADA.
FOR YOUR SAFETY
Operate infrared heaters with proper care and observe all safety precautions. Carefully follow printed installation, operating and cleaning instructions furnished with the heater. Do not store gasoline or combustible products in the vicinity of the heater. Do not touch the heater or the tubes while the heater is in operation. Adequate ventilation must always be provided in accordance with codes.
The Deflector Kit (Part # 43482000) is used to reduce clearances to combustibles below the heater. Details on Deflector Kit (PDF)
Side Reflector Kits
Side Reflector kits can be used to reduce the clearences to combustibles to the side of the heater. They are available as single side reflector or 2-side reflector.
Side Reflector Installation info (PDF)
Decorative Grille Kits
The heaters can be installed over non-combustible suspended ceilings with the use of aluminum decorative grilles. Decorative Grille Installation Instructions (PDF)
Tube Heater Accessories
Accessories for common tube heater installations include vent caps, combustion air termination caps, thermostats, programmable digital thermostats, 24V Thermostats relay kits, Thermostat enclosure, Chain Kits, Second Stage Line Regulators, and manual cutoff valves. To learn more click Tube Heater Accessories (PDF).
Troubleshooting Flowcharts are located toward the end of each products I & O pdf.