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NU-TOOL Nu-Air NTH100-2 Owner's Manual

Desa owner's manual portable forced air heaters nth35-2, nth50-2, nth70-2, nth100-2, nth150-2
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PORTABLE
FORCED
AIR HEATERS
OWNER'S MANUAL
Heater Sizes: 35,000 50,000 70,000
100,000 150,000 Btu/Hr
Models: NTH35-2, NTH50-2, NTH70-2, NTH100-2,
and NTH150-2
IMPORTANT: Read and understand this manual before assembling, start-
ing or servicing heater. Improper use of heater can cause serious injury.
Keep this manual for future reference.

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Summary of Contents for NU-TOOL Nu-Air NTH100-2

  • Page 1 AIR HEATERS OWNER’S MANUAL Heater Sizes: 35,000 50,000 70,000 100,000 150,000 Btu/Hr Models: NTH35-2, NTH50-2, NTH70-2, NTH100-2, and NTH150-2 IMPORTANT: Read and understand this manual before assembling, start- ing or servicing heater. Improper use of heater can cause serious injury.

  • Page 2: Safety Information

    PORTABLE FORCED AIR HEATERS SAFETY INFORMATION WARNINGS IMPORTANT: Read this owner’s manual carefully and completely before trying to assemble, oper- ate, or service this heater. Im- proper use of this heater can cause serious injury or death from burns, fire, explosion, electrical shock, and carbon monoxide poisoning.

  • Page 3: Product Identification

    PRODUCT IDENTIFICATION Hot Air Outlet Upper Shell Lower Shell Fuel Tank Side Cover ON/OFF Switch with Light Power Cord Figure 1 - 35/50/70,000 Btu/Hr Models Hot Air Outlet Lower Shell Fuel Cap Side Cover Figure 2 - 100/150,000 Btu/Hr Models 105787 OWNER’S MANUAL Handle...
  • Page 4 PORTABLE FORCED AIR HEATERS ASSEMBLY (FOR 100,000 AND 150,000 BTU/HR MODELS ONLY) These models are furnished with wheels and handles. Wheels, handles, and the mounting hardware are found in the shipping carton. Tools Needed • Medium Phillips Screwdriver • 3/8" Open or Adjustable Wrench •...

  • Page 5: Theory Of Operation

    THEORY OF OPERATION The Fuel System: The air pump forces air through the air line. The air is then pushed through the burner head nozzle. This air causes fuel to lift from the tank. A fine mist of fuel is sprayed into the combustion chamber.

  • Page 6: Storing, Transporting, Or Shipping

    PORTABLE FORCED AIR HEATERS STORING, TRANSPORTING, OR SHIPPING Note: If shipping, transport companies re- quire fuel tanks to be empty. 1. Drain fuel tank. Note: Some models have drain plug on underside of fuel tank. If so, remove drain plug to drain all fuel. If heater does not have drain plug, drain fuel through fuel cap opening.
  • Page 7 TROUBLESHOOTING Continued FAULT CONDITION Motor starts and runs but heater does not ignite (ON/OFF switch light remains on) Heater ignites but ignition control assembly shuts heater off after a short period of time (ON/OFF switch light remains on) ON/OFF switch light does not come on when switch is turned to the ON (|) position and heater does not start ON/OFF switch light comes on when switch...

  • Page 8: Service Procedures

    PORTABLE FORCED AIR HEATERS SERVICE PROCEDURES WARNING: Never service heater while it is plugged in, op- erating, or hot. Severe burns and electrical shock can occur. UPPER SHELL REMOVAL 1. Remove screws and lock washers along each side of heater using 5/16" nut- driver.
  • Page 9 SERVICE PROCEDURES Continued IGNITOR 1. Remove upper shell and fan guard (see page 8). 2. Remove fan (see page 13). 3. Remove 4 side cover screws with a 5/16" nut driver. Remove side cover (see Figure 9 or 10, page 8). 4.
  • Page 10 Plastic Cap Removal (35/50/70,000 Btu/Hr Models Shown) Filter End Fan Guard Cover Fan Guard Filter End Cover Pump Pressure Model (PSI/Bar) NTH35-2 2.9/0.200 NTH50-2 3.9/0.270 NTH70-2 4.9/0.338 NTH100-2 4.9/0.338 NTH150-2 5.5/0.380 Pressure Gauge Figure 16 - Adjusting Pump Pressure 105787...
  • Page 11 SERVICE PROCEDURES Continued NOZZLE ASSEMBLY 1. Remove upper shell (see page 8). 2. Remove fan (see page 13). 3. Remove fuel and air line hoses from nozzle assembly (see Figure 17, 18, or 19). 4. Turn nozzle assembly 1/4 turn to left and pull toward motor to remove (see Figure 20).

  • Page 12: Pump Rotor

    PORTABLE FORCED AIR HEATERS SERVICE PROCEDURES Continued PUMP ROTOR (Procedure if Rotor is Binding) 1. Remove upper shell (see page 8). 2. Remove filter end cover screws using 5/16" nut-driver. 3. Remove filter end cover and air filters. 4. Remove pump plate screws using 5/16" nut-driver.
  • Page 13 SERVICE PROCEDURES Continued IMPORTANT: Remove fan from motor shaft before removing motor from heater. The weight of the motor resting on the fan could damage the fan pitch. 1. Remove upper shell (see page 8). Use 1/8" allen wrench to loosen set- screw which holds fan to motor shaft.

  • Page 14: Illustrated Parts Breakdown

    PORTABLE FORCED AIR HEATERS ILLUSTRATED PARTS BREAKDOWN NTH35-2 35,000 BTU/HR MODEL 12-1 12-2 12-3 12-18 12-17 12-16 12-15 Motor and Pump Assembly 12-4 12-5 12-6 12-7 12-8 12-9 12-14 12-12 12-11 12-13 12-10 12-19 105787...

  • Page 15: Parts List

    PARTS LIST NTH35-2 35,000 BTU/HR MODEL PART NUMBER DESCRIPTION M51104-01 Handle 098511-256 Upper Shell M11084-29 Screw, #10-16 x 3/4" 102432-01 Screw/Lockwasher, 1/2" 098512-63 Combustion Chamber M10908-2 Screw, #6-32 x 3/8" 103154-03 Photocell Bracket M16656-24 Photocell Assembly Burner Strap Assembly HA3006 Nozzle Assembly 102548-05 Ignitor Kit...
  • Page 16 PORTABLE FORCED AIR HEATERS ILLUSTRATED PARTS BREAKDOWN NTH50-2 50,000 BTU/HR MODEL 12-1 12-2 12-3 12-18 12-17 12-16 12-15 Motor and Pump Assembly 12-4 12-5 12-6 12-7 12-8 12-9 12-14 12-12 12-11 12-13 12-10 12-19 105787...
  • Page 17 PARTS LIST NTH50-2 50,000 BTU/HR MODEL PART NUMBER DESCRIPTION M51104-01 Handle 098511-256 Upper Shell M11084-29 Screw, #10-16 x 3/4" 102432-01 Screw/Lockwasher, 1/2" 098512-67 Combustion Chamber M10908-2 Screw, #6-32 x 3/8" 103154-03 Photocell Bracket M16656-24 Photocell Assembly Burner Strap Assembly 100735-27 Nozzle Assembly 102548-05 Ignitor Kit...
  • Page 18 PORTABLE FORCED AIR HEATERS ILLUSTRATED PARTS BREAKDOWN NTH70-2 70,000 BTU/HR MODEL 12-1 12-2 12-3 12-18 12-17 12-16 12-15 Motor and Pump Assembly 12-4 12-5 12-6 12-7 12-8 12-9 12-14 12-12 12-11 12-13 12-10 12-19 105787...
  • Page 19 PARTS LIST NTH70-2 70,000 BTU/HR MODEL PART NUMBER DESCRIPTION M51104-01 Handle 098511-256 Upper Shell M11084-29 Screw, #10-16 x 3/4" 102432-01 Screw/Lockwasher, 1/2" 098512-64 Combustion Chamber M10908-2 Screw, #6-32 x 3/8" 103154-03 Photocell Bracket M16656-24 Photocell Assembly Burner Strap Assembly HA3026 Nozzle Assembly 102548-05 Ignitor Kit...
  • Page 20 PORTABLE FORCED AIR HEATERS ILLUSTRATED PARTS BREAKDOWN NTH100-2 100,000 BTU/HR MODEL 10-1 10-2 10-3 10-4 10-17 10-16 10-15 10-13 Motor and Pump Assembly 10-5 10-6 10-7 10-8 10-9 10-14 10-13 10-12 10-10 10-11 105787...
  • Page 21 This list contains replaceable parts used in your heater. When ordering parts, be sure to provide the PARTS LIST correct model and serial numbers (from the model plate), then the part number and description of the desired part. NTH100-2 100,000 BTU/HR MODEL PART NUMBER...
  • Page 22 PORTABLE FORCED AIR HEATERS ILLUSTRATED PARTS BREAKDOWN NTH150-2 150,000 BTU/HR MODEL 10-1 10-2 10-3 10-5 10-4 10-6 10-17 10-7 10-8 10-16 10-15 10-9 10-18 10-14 10-10 10-13 10-11 Motor and Pump Assembly 10-12 105787...
  • Page 23 This list contains replaceable parts used in your heater. When ordering parts, be sure to provide the PARTS LIST correct model and serial numbers (from the model plate), then the part number and description of the desired part. NTH150-2 150,000 BTU/HR MODEL PART NUMBER DESCRIPTION...

  • Page 24: Wheels And Handles

    PORTABLE FORCED AIR HEATERS WHEELS AND HANDLES 100,000 AND 150,000 BTU/HR MODELS KEY PART NO. NUMBER HA2203 HA2204 M12345-33 M12342-3 M12831-3 NTC-3C 107426-01 M28526 M51015-01 M16801-2 PART DESCRIPTION Handles Handles Screw, #10-24 x 1 " Wheel Support Frame Wheel Support Frame Hex Nut, #10-24 Wheel (Quantity of 2) Cap Nut...

  • Page 25: Specifications

    SPECIFICATIONS Output Rating (Btu/Hr\kw) 35,000(10) 50,000(15) 70,000(20) 100,000(30) 150,000(44) Fuel Fuel Tank Capacity (U.S. Gal./Liters) 3.0/11.4 Fuel Consumption (Gal. Per Hr./ Liters Per Hr.) .28/1.1 Electric Requirements Amperage (Normal Run) Hot Air Output (CFM/CMM) 140/4 1425 WIRING DIAGRAM Brown Blue Green-Yellow Photocell (3) (4)
  • Page 26 PORTABLE FORCED AIR HEATERS ACCESSORIES Purchase accessories from your local dealer. AIR GAUGE KIT - HA1180 For all models. Special tool to check pump pressure. HEAVY DUTY WHEELS AND HANDLE KIT - HA1202 For heavy duty applications. Makes your heater even more portable and convenient. For 35/50/70,000 Btu/Hr models.

  • Page 27: Ec Conformity Declaration

    EC CONFORMITY DECLARATION Model Numbers: NTH35-2, NTH50-2, NTH70-2, NTH100-2, NTH150-2 It is declared that these models conform to the Machinery Directive 98/37/EC, including 91/368/EEC and the Low Voltage Directive 73/23/EEC. It is further declared that these models conform to the EMC Directive 89/336/EEC, amended by 92/31/EEC and including EN50081-1 and EN50082-1.

  • Page 28: Warranty Information

    WARRANTY INFORMATION EQUIPMENT - LIMITED ONE YEAR WARRANTY NU-TOOL warrants new Products sold by it to be free from defects in material or workmanship for a period of one year after date of delivery to the first user and subject to the following conditions: NU-TOOL's obligation and liability under this Warranty is expressly limited to repairing or replacing at NU-TOOL's option,...

This manual is also suitable for:

Nu-air nth50-2Nu-air nth150-2Nu-air nth70-2Nu-air nth35-2

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