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NU-TOOL Nu-Air NTH100 Owner's Manual

Desa owner's manual portable forced air heaters nth35, nth50, nth70, nth100, nth150
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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, NTH50, NTH70, NTH100, and NTH150
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

  • Page 1 OWNER’S MANUAL Heater Sizes: 35,000 50,000 70,000 100,000 150,000 Btu/Hr Models: NTH35, NTH50, NTH70, NTH100, and NTH150 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.

  • 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

    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 104976 OWNER’S MANUAL Handle Fan Guard Air Filter End Cover Fuel Cap Upper Shell Fan Guard Fuel Tank Flame-Out Control Reset Button...

  • Page 4: Tools Needed

    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

    A fine mist of fuel is sprayed into the combustion chamber. The Air System: The motor turns the fan. The fan pushes air into and around the combustion chamber. This air is heated and provides a stream of clean, hot air.

  • Page 6: Storing, Transporting, Or Shipping

    See Storing, Transporting, or Ship- ping. See Air Output, Air Intake, and Lint Filters, page 10. See Air Output, Air Intake, and Lint Filters, page 10. See Fuel Filter, page 8. See Spark Plug, page 9. See Fan, page 13. 104976...

  • Page 7: Troubleshooting

    See Storing, Transporting, or Shipping, page 6. 6. Make sure electronic ignitor mounting is tight. 7. Replace electronic ignitor. 1. Reset flame-out control button, see Figures 5 and 6, page 5. 2. If fan is hard to turn, see Pump Rotor, page 12.

  • Page 8: Service Procedures

    1. Remove screws and lock washers along each side of heater using 5/16" nut- driver. These screws attach upper and lower shells together. 2. Lift upper shell off. 3. Remove fan guard. Fuel Filter (35/50/70,000 Btu/Hr Models) 1. Remove side cover screws using 5/16" nut-driver.

  • Page 9: Spark Plug

    14. Attach spark plug wire to spark plug. 15. Attach fuel and air line hoses to nozzle assembly. 16. Replace fan (see page 13). 17. Replace fan guard and upper shell. 104976 OWNER’S MANUAL Spark Plug Mounting Nut Combustion...

  • Page 10: Air Output, Air Intake, And Lint Filters

    5. Wash or replace air intake filter (see Preventative Maintenance Schedule, page 6). 6. Replace filter end cover. 7. Replace fan guard and upper shell. IMPORTANT: Do not oil filters Pump Pressure Adjustment 1. Remove pressure gauge plug from filter end cover.
  • Page 11 5/8" socket wrench (4.5-5.1 n-m/ 40-45 inch-pounds). 10. Attach nozzle assembly to burner strap. 11. Attach fuel and airline hoses to nozzle assembly. 12. Replace fan (see page 13). 13. Replace fan guard and upper shell. Combustion Chamber Nozzle Assembly Fuel Line...

  • Page 12: Pump Rotor

    .076/.101 mm (.003"/.004") at tight- est position. Adjust if needed. 10. Install blades, pump plate, air filters, and filter end cover. 11. Replace fan guard and upper shell. 12. Adjust pump pressure (see page 10). Note: If rotor is still binding, proceed as follows.

  • Page 13: Specifications

    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). 2. 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 35,000 BTU/HR MODEL 18-1 18-2 18-18 18-4 18-3 18-17 18-16 18-15 18-14 Motor and Pump Assembly 18-5 18-6 18-7 18-8 18-9 18-10 18-11 18-12 18-13 11-5 11-4 14 10 11-1 11-2 11-3 104976...

  • Page 15: Parts List

    WLE-3 079010-33 097462-01 079919-01 PARTS AVAILABLE - NOT SHOWN HA2210 104974-01 M9900-192 PART DESCRIPTION QTY. Fan Guard Hex locknut Bushing (wires) Screw/Lockwasher, 1/2" Lower Shell Clip Nut Screw, #10-32 x 3/4" Rubber Airline Fuel Line Wire Assembly (red) Rubber Bushing...
  • Page 16 PORTABLE FORCED AIR HEATERS ILLUSTRATED PARTS BREAKDOWN NTH50 50,000 BTU/HR MODEL Burner Head Assembly 10-1 10-2 10-4 10-5 10-3 10-6 18-19 18-1 18-2 18-18 18-4 18-3 18-17 18-16 18-15 18-14 Motor and Pump Assembly 10-7 18-5 18-6 18-7 18-8 18-9 18-10 18-11 18-12...
  • Page 17 WLE-3 HA2210 104974-01 M9900-192 PART DESCRIPTION Elbow, 90˚ (Barb Fitting) Blade Screw, #10-32 x 5/8" Capacitor Fan Guard Hex locknut Bushing (wires) Power Line RFI Filter Lower Shell Clip Nut ON/OFF Switch Switch Cover Screw, #10-32 x 3/4" Rubber Airline...
  • Page 18 PORTABLE FORCED AIR HEATERS ILLUSTRATED PARTS BREAKDOWN NTH70 70,000 BTU/HR MODEL Burner Head Assembly 10-1 10-2 10-4 10-5 10-3 10-6 18-19 18-1 18-2 18-18 18-4 18-3 18-17 18-16 18-15 18-14 Motor and Pump Assembly 10-7 18-5 18-6 18-7 18-8 18-9 18-10 18-11 18-12...
  • Page 19 HA2210 104974-01 M9900-192 PART DESCRIPTION QTY. Elbow, 90˚ (Barb Fitting) Blade Screw, #10-32 x 5/8" Capacitor Fan Guard Hex locknut Bushing (wires) Power Line RFI Filter Lower Shell Clip Nut ON/OFF Switch Switch Cover Screw, #10-32 x 3/4" Rubber Airline...
  • Page 20 PORTABLE FORCED AIR HEATERS ILLUSTRATED PARTS BREAKDOWN NTH100 100,000 BTU/HR MODEL Burner Head Assembly 13-19 13-1 13-3 13-2 13-4 13-18 13-17 13-16 13-15 13-14 Motor and Pump Assembly 13-5 13-6 13-7 13-8 13-9 13-13 13-12 13-10 13-11 104976...
  • Page 21 PARTS LIST NTH100 100,000 BTU/HR MODEL PART PART NUMBER DESCRIPTION 098511-233 Upper Shell 102432-01 Screw/Lockwasher, 1/2" 098512-31 Combustion Chamber M16660 Photocell Bracket HA3019 Photocell Assembly M27417 Drain Plug M10908-2 Screw, #6-32 x 3/8" Burner Head Assembly 100735-15 Nozzle M10659-1 Nozzle Seal Washer...
  • Page 22 PORTABLE FORCED AIR HEATERS ILLUSTRATED PARTS BREAKDOWN NTH150 150,000 BTU/HR MODEL Burner Head Assembly 13-19 13-1 13-3 13-2 13-4 13-18 13-17 13-16 13-15 13-14 Motor and Pump Assembly 13-5 13-6 13-7 13-8 13-9 13-13 13-12 13-10 13-11 104976...
  • Page 23 13-18 M8643-2 Blade 13-19 103229-01 Capacitor M51114-01 Fan Guard **Not available as an assembly, order parts separately. 104976 OWNER’S MANUAL This list contains replaceable parts used in your heater. When ordering parts, be sure to provide the correct model and serial numbers (from the model plate), then the part number and description of the desired part.

  • Page 24: Wheels And Handles

    PORTABLE FORCED AIR HEATERS WHEELS AND HANDLES 100,000 AND 150,000 BTU/HR MODELS KEY PART PART NO. NUMBER DESCRIPTION HA2203 Handles HA2204 Handles M12345-33 Screw, #10-24 x 1 3/4" M12342-3 Wheel Support Frame M12831-3 Wheel Support Frame NTC-3C Hex Nut, #10-24 097896-03 Wheel M28526...

  • Page 25: Ec Conformity Declaration

    EC CONFORMITY DECLARATION Model Numbers: NTH35, NTH50, NTH70, NTH100, NTH150 It is declared that these models conform to the Machinery Directive 89/392/EEC, 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 26: 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 nth150Nu-air nth35Nu-air nth50Nu-air nth70

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