Desa NTH70 User's Manual
Contents
1. MU 72 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 C MOTA iia PORTABLE FORCED AIR HEATERS SAFETY INFORMATION AN warnincs 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 causeserious injury or death from burns fire explosion electrical shock and carbon monoxide poisoning A DANGER Carbon monoxide poisoning may lead to death Carbon Monoxide Poisoning Early signs of carbon monoxide poisoning resemble the flu with headaches dizziness and or nau sea If you have these signs the heater may not be working properly Get fresh air at once Have heater serviced Some people are more affected by carbon monoxide than others These include pregnant women per sons with heart or lung disease or anemia those under the influence of alcohol and those at high altitudes Make certain you read and understand all Warnings Keep this manual for reference It is your guide to safe and proper operation of this heater e Use only kerosene or No 12. Wave Spring Washer Screw Lockwasher 1 2 Air Line Fuel Line Fan Motor and Pump Assembly Motor with capacitor Pump Body Screw 10 32 x 3 4 Insert Rotor End Pump Cover Intake Filter End Filter Cover Steel Ball 1 4 Dia Pressure Relief Spring Adjusting Screw Plug Screw 10 32 x 1 Output Filter Screw 10 32 x 1 1 8 Lint Filter Barb Fitting Blade Capacitor Fan Guard 2 ND On 4a ND On ap 2 2 0 pt wo Sa CS CO gt Ee CET SP CC Not available as an assembly order parts separately 104976 PART NUMBER M50631 097468 01 101206 01 WLE 3 NPF 3B NTC 4C 102482 02 M11084 29 099125 13 099157 01 M50104 03 M50104 03 M50104 01 099213 01 102801 01 09851 1 234 M11271 8 RF3 6B M51150 01 M10990 3 M51151 02 098513 92 097702 01 M16841 57 097630 02 M50400 098872 03 M51077 01AA 097785 04 078918 01 099177 01 079010 34 097462 01 079919 01 PART DESCRIPTION Rubber Bumper Edge Liner Motor Bracket Lock Washer 10 Nut 10 32 Hex locknut Electronic Ignitor Screw 10 16 x 3 4 Terminal Board Rivet Bushing Bushing Bushing Button Plug Power Line RFI Filter Lower Shell Clip Nut Screw 10 32 x 3 4 Fuel filter Rubber Bushing Fuel Line Fuel Tank Fuel Tank Cap Wire Assembly red Flame Out Control Strain Relief Bushing Power Cord Side Cover Vinyl Foam Gasket Terminal Board Tab Cap Hex Nut Wire Assembly black ON OFF Switch Switc
3. Reinstall insert and rotor 16 Perform steps 10 through 12 above O A F O lt 076 101 mm 003 004 Gap Measured With Feeler Gauge O A O Sandpaper 0 ae j Rotor O o AN LIX Gap Adjusting Screw I PSN Figure 27 Gap Adjusting Screw at ee Locations si Figure 28 Sanding Rotor 12 104976 SERVICE PROCEDURES Continued Fan 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 2 Remove upper shell see page 8 Use 1 8 allen wrench to loosen set screw which holds fan to motor shaft Slip fan off motor shaft Clean fan using a soft cloth moistened with kerosene or solvent Dry fan thoroughly Replace fan on motor shaft Place fan hub flush with end of motor shaft see Figure 30 Place setscrew on flat of shaft Tighten setscrew firmly 40 50 inch pounds 4 5 5 6 n m Replace fan guard and upper shell Setscrew Motor Shaft Figure 29 Fan Motor Shaft and Setscrew Location Pl Motor Shaft Setscrew Figure 30 Fan Cross Section 104976 OWNER S MANUAL SPECIFICATIONS Output Rating Btu Hr 35 000 50 000 70 000 100 000 150 000 Fuel Use Only Kerosene or No Fuel Oil Fuel Tank Capacity U S G
4. Barb Fitting Spark Plug Screw Lockwasher 1 2 Air Line Fuel Line Fan Motor and Pump Assembly Motor with capacitor Pump Body Screw 10 32 x 5 8 Insert Rotor End Pump Cover Intake Filter End Filter Cover Steel Ball 1 4 Dia Pressure Relief Spring Adjusting Screw Plug Screw 10 32 x 1 Output Filter Screw 10 32 x 1 Lint Filter Barb Fitting Blade Capacitor Fan Guard Rubber Bumper D nr mn nm ND ND OO 4 wo Dim Rae A DOA Bi nm nn 4 on nn an an pp om oa on an in i PARTS AVAILABLE NOT SHOWN 21 PART NUMBER 097468 01 101206 01 WLE 3 NPF 3B NTC 4C 102482 02 M11084 29 099125 13 099157 01 M50104 03 M50104 03 M50104 01 099213 01 102801 01 098511 234 M11271 8 RF3 6B M51150 01 M10990 3 M51151 01 098513 91 097702 01 M16841 57 097630 02 M50400 098872 03 M51077 01AA 099177 01 078918 01 079010 34 097462 01 079919 01 HA2210 104998 01 M9900 192 PART DESCRIPTION Edge Liner Motor Bracket Lock Washer 10 Nut 10 32 Hex locknut Electronic Ignitor Screw 10 16 x 3 4 Terminal Board Rivet Bushing Bushing Bushing Button Plug Power Line RFI Filter Lower Shell Clip Nut Screw 10 32 x 3 4 Fuel filter Rubber Bushing Fuel Line Fuel Tank Fuel Tank Cap Wire Assembly red Flame Out Control Strain Relief Bushing Power Cord Side Cover Hex Nut Terminal Board Tab Cap Wire Assembly black ON OFF Switch Sw
5. OR GRANT ANY OTHER WARRANTY UNLESS SUCH CHANGE IS MADE IN WRITING AND SIGNED BY AN OFFICER OF NU TOOL AT ITS HOME OFFICE WARRANTY SERVICE Always specify model and serial numbers when communicating with the factory We reserve the right to amend these specifications at any time without notice The only Warranty applicable is our standard written Warranty We make no other Warranty expressed or implied 104976 01 REV A Printed in U S A 08 98
6. See Fuel Filter page 8 4 Dirt in nozzle 4 See Nozzle page 11 5 Water in fuel tank 5 Drain and flush fuel tank with clean kerosene See Storing Transporting or Shipping page 6 WARNING High voltage 6 Electronic ignitor not grounded earthed 6 Make sure electronic ignitor mounting is tight 7 Bad electronic ignitor 7 Replace electronic ignitor Motor does not start when heater is plugged 1 Flame out control not reset 1 Reset flame out control button see in fan rotates slowly or does not turn Figures 5 and 6 page 5 2 Binding pump rotor 2 If fan is hard to turn see Pump Rotor 104976 page 12 MOTA iia PORTABLE FORCED AIR HEATERS SERVICE Upper Shell Upper 8 PROCEDURES ES Fan Shell Guard 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 These screws attach upper and lower shells together Figure 8 Upper Shell Removal 100 2 Lift upper shell off 70 000 Btu Hr Models 150 000 Btu Hr Models 3 Remove fan guard Fuel Filter Fuel Filter 35 50 70 000 Btu Hr Models 1 Remove side cover screws using 5 16 nut driver Remove side cover Pull rubber fuel line off fuel filter neck Carefully pry bushing and fuel filter out of fuel tank 5 Wash fuel filter with clean fuel and re
7. body of spark plug from vise Replace burner strap onto combustion chamber Attach spark plug wire to spark plug Attach fuel and air line hoses to nozzle assembly Replace fan see page 13 Replace fan guard and upper shell 104976 OWNER S MANUAL Spark Plug Combustion Mounting Nut Chamber Le Burner Strap Spark Plug Spark Plug Wire Nozzle Assembly Air Line J iz Line Hose Hose Figure 11 Spark Plug Removal 35 000 Btu Hr Model Bend Here to Adjust il Qt A 1 4 mm 055 Gap Figure 12 Spark Plug Gap 35 000 Btu Hr Model Burner Strap Burner Strap S SC AT Figure 13 Spark Plug Rotation 35 000 Btu Hr Model Only Spark Plug 50 70 100 150 000 Btu Hr Models 1 Remove upper shell see page 8 2 Remove fan see page 13 3 Remove spark plug wire from spark plug 4 Remove spark plug from burner head using 13 16 open end wrench 5 Clean and regap spark plug electrodes as follows 50 70 100 000 Btu Hr Models 1 9 mm 075 gap 150 000 Btu Hr Model 2 8 mm 0 110 gap Install spark plug in burner head Attach spark plug wire to spark plug Replace fan see page 13 6 7 8 9 Burner Replace fan guard and upper shell Spark Plug Wire Figure 14 Spark Plug Removal 50 70 100 150 000 Btu Hr Mo
8. g place in tank gt 6 Attach rubber fuel line to fuel filter Side Cover neck Fuel Line Figure 9 Fuel Filter Removal 35 50 70 000 Btu Hr Models 7 Replace side cover Fuel Filter 100 150 000 Btu Hr Models Fuel Filter Bushing and Lower Fuel Line 1 Remove side cover screws using 5 16 nut driver Remove side cover 9 Upper Fuel Pull upper fuel line off fuel filter neck Line Carefully pry bushing lower fuel line and fuel filter out of fuel tank 5 Wash fuel filter with clean fuel and re place in tank 6 Attach upper fuel line to fuel filter neck 7 Replace side cover Side Cover Figure 10 Fuel Filter Removal 100 150 000 Btu Hr Models 8 104976 SERVICE PROCEDURES Continued Spark Plug 35 000 Btu Hr Model 1 2 3 10 11 12 13 14 15 16 17 Remove upper shell see page 8 Remove fan see page 13 Remove fuel and air line hoses from nozzle assembly Remove spark plug wire from spark plug Remove two screws using 5 16 nut driver and remove burner strap Place hex body of spark plug into vise and tighten Remove spark plug mounting nut us ing 11 16 open end wrench Remove burner strap from spark plug Clean and regap spark plug electrodes to 1 4 mm 055 gap Replace burner strap onto spark plug Rotate burner strap to position spark plug electrodes see Figure 13 Tighten spark plug with spark plug mounting nut Release hex
9. 4976 Figure 6 Flame Out Control Reset Button 100 150 000 Btu Hr MOTA iia 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 Be sure all fuel is removed Replace drain plug if provided 3 If any debris is noted in old fuel add 1 or 2 quarts of clean kerosene to tank stir and drain again This will prevent excess debris from clogging filters dur ing future use 4 Replace fuel cap or drain plug Prop erly dispose of old and dirty fuel Check with local automotive service stations that recycle oil 5 If storing store heater in dry place Make sure storage place is free of dust and corrosive fumes IMPORTANT Do not store kerosene over summer months for use during next heating season Using old fuel could damage heater PREVENTATIVE MAINTENANCE SCHEDULE Sever Item A WARNING Never service heater while it is plugged in operating or hot Severe burns and electrical shock can How Often How To Fuel tank Air output and lint filters Air intake filter Fuel filter Spark plug Fan blades Motor Flush every 150 200 hours of operation or as needed Replace every 500 hours of
10. 50 000 Btu Hr Models Pressure Gauge Plug Relief Valve Figure 18 Pressure Gauge Plug Removal 35 50 70 000 Btu Hr Models Shown Pump Pressure Model PSI Bar 35 000 Btu Hr 2 9 0 200 50 000 Btu Hr 4 9 0 338 70 000 Btu Hr 5 2 0 359 100 000 Btu Hr 3 9 0 269 150 000 Btu Hr 4 8 0 331 Pressure Gauge EX Figure 19 Adjusting Pump Pressure 104976 SERVICE PROCEDURES Continued Nozzle 35 000 Btu Hr Model 1 Remove upper shell see page 8 2 Remove fan see page 13 3 Remove fuel and air line hoses from nozzle assembly 4 Turn nozzle assembly 1 4 turn to left and pull toward motor to remove 5 Place plastic hex body into vise and lightly tighten 6 Carefully remove nozzle from the nozzle adapter using 5 8 socket wrench 7 Blow compressed air thru face of nozzle This will free any dirt in nozzle area 8 Inspect nozzle seal for damage Replace nozzle into nozzle adapter un til nozzle seats Tighten 1 3 turn more using 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 Assembly Fuel Line Hose Air Line Hose Figure 20 Removing Air and Fuel Line Hoses 35 000 Btu Hr Model 104976 OWNER S MANUAL Burner Strap Nozzle Assembly Figure 21 Remo
11. Fuel Tank Side Cover Nut 10 32 Hex Nut Terminal Board Tab Cap Vinyl Foam Gasket Lock Washer 10 Filler Neck Screen Tradename Decal Combustion Chamber Ground Wire Bee own nnn GO ND ON HA ND A ND D nr QD On nm Ba a ap PORTABLE FORCED AIR HEATERS ILLUSTRATED PARTS BREAKDOWN NTH70 70 000 BTU HR MODEL Burner Head Assembly 18 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 PARTS LIST NTH70 70 000 BTU HR MODEL PART NUMBER M51104 01 098511 231 102432 01 098512 44 M11084 29 M16660 M10908 2 HA3019 098872 03 100735 14 M10659 1 M10809 1 M8882 M51098 02 M50820 01 104184 01 102431 01 M30865 02 M50400 M30884 M50631 079010 33 101205 01 102001 19 079975 02 M22009 M22456 1 M29608 M29632 M29633 M29609 M12461 31 M8940 M10993 1 M27694 M22997 M29612 01 M12461 31 OANOOAHRWN PART DESCRIPTION Handle Upper Shell Screw Lockwasher 1 2 Combustion Chamber Screw 10 16 x 3 4 Photocell Bracket Screw 6 32 x 3 8 Photocell Assembly Power Cord Burner Head Assembly Nozzle Nozzle Seal Washer Nozzle Seal Spring Nozzle Seal Sleeve Burner Head Body Barb Fitting Spark Plug Screw Lockwasher 1 2 Bushing Strain
12. PF3 6C OO SID O1 ND PART DESCRIPTION Handle Upper Shell Screw Lockwasher 1 2 Combustion Chamber Heat Shield Screw 10 16 x 3 4 Photocell Bracket Screw 6 32 x 3 8 Photocell Assembly Power Cord Burner Strap Assembly Bracket Spark Plug Nozzle Adapter Nut 14mm Nozzle Power Line RFI Filter Bushing Strain Relief Bushing Fan Rubber Bumper Motor Bracket Motor and Pump Assembly Motor 230V 50Hz Pump Body Insert Rotor End Pump Cover Lint Filter Intake Filter End Filter Cover Screw 10 32 x 1 Steel Ball 1 4 Dia Pressure Relief Spring Adjusting Screw Plug Output Filter Screw 10 32 x 1 1 8 Elbow 90 Barb Fitting Blade Screw 10 32 x 3 4 MP RH OA BB aan wee anon nnn nnn ND ni MN mn nm nm nm nnn An pO op Aan aa Not available as an assembly order parts separately 104976 PART NUMBER M51105 01 NTC 4C M50104 02 102431 01 098511 232 M11271 8 RF3 6B M29652 04 M29652 05 M16841 57 M10990 3 M50876 04 102482 02 M11084 29 099125 13 099157 01 097630 02 097702 01 098513 89 097461 05AA NPF 3B 099177 01 078918 01 097785 01 WLE 3 079010 33 097462 01 079919 01 HA2210 104974 01 M9900 192 PART DESCRIPTION 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 Fuel Filter Assembly Include
13. Relief Bushing Fan Rubber Bumper Wire Assembly black Motor Bracket Motor and Pump Assembly Motor with capacitor Pump Body Insert Rotor End Pump Cover Lint Filter Intake Filter End Filter Cover Screw 10 32 x 1 Steel Ball 1 4 Dia Pressure Relief Spring Adjusting Screw Plug Output Filter Screw 10 32 x 1 D HN ND est eae D ND OO O 2 42 4 0 SB Boon nn nnn in ND ON D Not available as an assembly order parts separately 104976 PARTS AVAILABLE NOT SHOWN PART NUMBER M50016 M8643 FHPF3 5C 104007 01 M51105 01 NTC 4C M50104 02 102801 01 09851 1 232 M11271 8 097462 01 079919 01 RF3 6B M29652 04 079973 01 M16841 57 M10990 3 M50876 05 102482 02 M11084 29 099125 13 099157 01 097702 01 097630 02 098513 90 097461 05AA NPF 3B 099177 01 078918 01 097785 01 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 Fuel Line Wire Assembly red Rubber Bushing Fuel Filter Assembly Includes bushing Electronic Ignitor Screw 10 16 x 3 4 Terminal Board Rivet Fuel Tank Cap Flame Out Control Fuel Tank Side Cover Nut 10 32 Hex Nut Terminal Board Tab Cap Vinyl Foam Gasket Lock Washer 10 Filler Neck S
14. al Liters 3 0 11 4 5 0 18 9 5 0 18 9 9 0 34 13 5 51 1 Fuel Consumption Gal Per Hr Liters Per Hr 26 1 0 37 1 40 49 1 85 70 2 7 1 1 4 1 Electric Requirements 230 V 50 Hz Same All Models Amperage Normal Run 8 1 0 1 0 1 2 1 2 Hot Air Output CFM CMM 140 4 205 5 8 225 6 4 425 12 500 14 2 RPM 1425 2850 2850 2850 2850 ON Off Switch i i H Ignitor Tr B Black 1 tal Black he esel ame Ou Orange u Butoi Ool i Red L Black R Red c _ Red a A i Para 2 Green Yellow Board White B 9 _ White Brown j White RFI Filter Blue Blue White 230 V 50 Hz Photocell Green Yellow Figure 31 Wiring Diagram MOZA PORTABLE FORCED AIR HEATERS ILLUSTRATED PARTS BREAKDOWN NTH35 35 000 BTU HR MODEL Motor and Pump Assembly 14 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 PARTS LIST NTH35 and description of the desired part 35 000 BTU HR MODEL PART NUMBER M51104 01 098511 231 102432 01 098512 43 M51108 01 M11084 29 M16660 M10908 2 HA3019 098872 03 097124 01 104183 01 079980 01 M29824 HA3006 102801 01 M30865 02 M50400 M30884 M50631 101205 01 102001 15 079975 03 M22009 M22456 2 M29608 M29632 M29633 M29609 M12461 31 M8940 M10993 1 M27694 M22997 M29612 01 M12461 32 M50016 M8643 2 FH
15. ank with kerosene or No 1 fuel oil 3 Attach fuel cap Plug power cord of heater into standard 230 volt 50 hertz grounded earthed outlet Use an extension cord if needed Use only a three prong grounded earthed extension cord EXTENSION CORD WIRE SIZE REQUIREMENTS Up to 30 5 meters 100 feet long use 1 0 mm 16 AWG conductor 30 6 to 61 meters 101 to 200 feet long use 1 5 mm 14 AWG conductor Push ON OFF switch to ON and heater should start If heater does not start press flame out control reset button see Figures 5 and 6 TO STOP HEATER 1 Push ON OFF switch to OFF TO RESTART HEATER 1 Wait 2 minutes after stopping heater 2 Repeat steps under To Start Heater Flame Out Control Reset Button ON OFF Switch Motor Air Pump Combustion Spark Intake Air Chamber Burner Fan Filter as Head 74 A SS gt ii Ii oh Clean F Heated H Fa Cool Air Out lt gt Air In Figure 5 Flame Out Control Reset wy N Button 35 50 70 000 Btu Hr Va 3 amp 7 1 A lt Output N Air Filter Flame Out Control N Reset Button A Fuel Fuel Air Line Electronic Tank Nozzle Filter To Burner Ignitor Air For Fuel Pro Fuel ON OFF on Switch lt lt System lt a Combustion And Heating Figure 4 Cross Section Operational View 10
16. creen Tradename Decal Combustion Chamber Ground Wire iii nr D NON A ND B ND D Or Q A Ba a N a PORTABLE FORCED AIR HEATERS ILLUSTRATED PARTS BREAKDOWN NTH100 100 000 BTU HR MODEL Motor and Pump Assembly 20 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 PARTS LIST NTH100 and description of the desired part 100 000 BTU HR MODEL PART NUMBER 09851 1 233 102432 01 098512 31 M16660 HA3019 M27417 M10908 2 8 1 100735 15 8 2 M10659 1 8 3 M10809 1 8 4 M8882 8 5 M50924 03 8 6 M50820 02 8 7 104184 01 9 102431 01 10 M50814 06 11 M51345 01 12 102042 01 13 13 1 102001 03 13 2 079975 02 13 3 FHPF3 5C 13 4 M22009 13 5 M22456 1 13 6 M50545 13 7 M12179 13 8 M16545 13 9 M8940 13 10 M10993 1 13 11 M27694 13 12 M22997 13 13 M12461 31 13 14 M12244 1 13 15 M12461 31 13 16 M11637 13 17 M50820 02 13 18 M8643 13 19 103229 01 14 M51114 01 15 M50631 Not available as an assembly order parts separately 104976 PART DESCRIPTION Upper Shell Screw Lockwasher 1 2 Combustion Chamber Photocell Bracket Photocell Assembly Drain Plug Screw 46 32 x 3 8 Burner Head Assembly Nozzle Nozzle Seal Washer Nozzle Seal Spring Nozzle Seal Sleeve Burner Head Body
17. dels Bend Here to Adjust Gap Figure 15 Spark Plug Gap 50 70 100 150 000 Btu Hr Models Continued MOTA iia PORTABLE FORCED AIR HEATERS SERVICE PROCEDURES Continued Air Output Air Intake and Lint Filters 1 Remove upper shell see page 8 2 Remove filter end cover screws using 5 16 nut driver 3 Remove filter end cover Replace air output 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 2 Install accessory pressure gauge part number HA1180 3 Start heater see Operation page 5 Allow motor to reach full speed 4 Adjust pressure Turn relief valve to right to increase pressure Turn relief valve to left to decrease pressure See specifications below for correct pres sure for each model 5 Remove pressure gauge Replace pres sure gauge plug in filter end cover K SN Lint Filter Air Output Filter Air Intake Filter Filter End Fan Guard Figure 16 Air Output Air Intake and Lint Filters 35 50 70 000 Btu Hr Models Air Intake Filter Lint Filter Air Output Filter Filter End Fan Guard Cover Figure 17 Air Output Air Intake and Lint Filters 100 1
18. ean fuel system often MOTA iia 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 e Medium Phillips Screwdriver e 3 8 Open or Adjustable Wrench e Hammer 1 Slide axle through wheel support frame Install wheels on axle IMPORTANT When installing wheels point extended hub of wheels toward wheel support frame see Figure 3 Hot Air Outlet Fuel Tank Flange s Wheel Support Frame kl Cap Nut A i 3 we Front Handle Place cap nuts on axle ends Gently tap with hammer to secure Place heater on wheel support frame Make sure air inlet end rear of heater is over wheels Line up holes on fuel tank flange with holes on wheel sup port frame Place front handle and rear handle on top of fuel tank flange Insert screws through handles fuel tank flange and wheel support frame Attach nut finger tight after each screw is inserted After all screws are inserted tighten nuts firmly Rear Handle Extended Hub Axle Figure 3 Wheel and Handle Assembly 100 150 000 Btu Hr Models Only VENTILATION WARNING Follow the mini mumfresh outside air ventilation requirements If proper fresh out side air ventilation is not provided carbon monoxide poisoning can occur Provide proper fresh out
19. ell Assembly Power Cord Burner Head Assembly Nozzle Nozzle Seal Washer Nozzle Seal Spring Nozzle Seal Sleeve Burner Head Body Barb Fitting Spark Plug Screw Lockwasher 1 2 Bushing Strain Relief Bushing Fan Rubber Bumper Wire Assembly black Motor Bracket Motor and Pump Assembly Motor 230V 50Hz Pump Body Insert Rotor End Pump Cover Lint Filter Intake Filter End Filter Cover Screw 10 32 x 1 Steel Ball 1 4 Dia Pressure Relief Spring Adjusting Screw Plug Output Filter Screw 10 32 x 1 D NN 4 ND AHAB AN HN HO Di mn mn 4 oa Won nm mn nnn nn nn ND ON ap PART NUMBER M50016 M8643 FHPF3 5C 104007 01 M51105 01 NTC 4C M50104 02 102801 01 098511 232 M11271 8 097462 01 079919 01 RF3 6B M29652 04 079973 01 M16841 57 M10990 3 M50876 05 102482 02 M11084 29 099125 13 099157 01 097702 01 097630 02 098513 90 097461 05AA NPF 3B 099177 01 078918 01 097785 01 WLE 3 PARTS AVAILABLE NOT SHOWN 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 Fuel Line Wire Assembly red Rubber Bushing Fuel Filter Assembly Includes bushing Electronic Ignitor Screw 10 16 x 3 4 Terminal Board Rivet Fuel Tank Cap Flame Out Control
20. fuel oil to avoid risk of fire or explosion Never use gasoline naphtha paint thinners alcohol or other highly flammable fuels e Fueling a Personnel involved with fueling shall be qualified and thoroughly familiar with the manufacturer s instructions and applicable regulations regarding the safe fueling of heating units Only the type of fuel specified on the heater s data plate shall be used All flame including the pilot light if any shall be extinguished and the heater allowed to cool prior to fueling d During fueling all fuel lines and fuel line connections shall be inspected for leaks Any leaks shall be repaired prior to returning the heater to service b wm c lt e At no time shall more than one day s supply of heater fuel be stored inside a building in the vicinity of the heater Bulk fuel storage shall be outside the structure f All fuel storage shall be located a minimum of 762cm 25 feet from heaters torches welding equipment and similar sources of ignition exception the fuel reservoir integral with the heater unit Whenever possible fuel storage shall be confined to areas where floor penetrations do not permit fuel to drip onto or be ignited by a fire at lower elevation Fuel storage shall be in accordance with the authority having jurisdiction Nn 8 h Never use heater where gasoline paint thinner or other highly flammable vapors are present Follow all l
21. h Cover Dr aaa aon n nnn 00 an pj aaa an pj On ND amp ND ND PARTS AVAILABLE NOT SHOWN 23 HA2210 104998 01 M9900 192 Filler Neck Screen Tradename Decal Combustion Chamber Ground Wire PORTABLE FORCED AIR HEATERS WHEELS AND HANDLES 100 000 AND 150 000 BTU HR MODELS PART PART NUMBER DESCRIPTION HA2203 Handles HA2204 Handles M12345 33 M12342 3 M12831 3 Screw 10 24 x 1 3 4 Wheel Support Frame Wheel Support Frame NTC 3C Hex Nut 10 24 097896 03 Wheel M28526 Cap Nut M51015 01 Axle M16801 2 Axle 100 000 QTY nno NR 150 000 QTY 24 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 P STANDARD WHEELS AND HANDLE KIT HA1206 Makes heater even more portable and con venient Easy to assemble For 35 50 70 000 Btu Hr models 104976 OWNER S MANUAL EC CONFORMITY DECLARATION EC CONFORMITY DECLARATION NU TOOL Group Carcroft Industrial Estate Adwick Le Street Doncoster KN6 7DU England Manufacturer DESA International Inc 2701 Industrial Drive Bowling Green KY 42101 U S A Kerosene Portable Forced Air Heaters Model N
22. heater Never attach duct work to front or rear of heater 104976 OWNER S MANUAL UNPACKING PRODUCT IDENTIFICATION Hot Air Outlet Upper Shell De th Handle Fan Guard b Air Filter le End Cover et Fuel Cap Lower Shell Fuel Tank 7 Side Cover ON OFF Switch Flame Out Control D lt Reset Button Power Cord Figure 1 35 50 70 000 Btu Hr Models Hot Air Outlet Lower Shell i KS da Fan Guard Fuel Tank a Flame Out Side Cover ee as SID Reset AA gq Upper Shell Power Cord ON OFF Switch Figure 2 100 150 000 Btu Hr Models 104976 3 1 Remove all packing items applied to heater for shipment Remove all items from carton Check items for any shipping damage If heater is damaged promptly inform dealer where you bought heater FUELS WARNING Use only kerosene or No 1 fuel oil to avoid risk of fire or explosion Never use gasoline naphtha paint thinners alcohol or other highly flammable fuels Do not use heavy fuels such as No 2 fuel oil or No 2 Diesel Using heavy fuels will result in clogged fuel filter and nozzle carbon build up on spark plug use of non toxic anti icer in fuel during very cold weather IMPORTANT Use a KEROSENE ONLY container Be sure storage container is clean Foreign matter such as rust dirt or water will cause the flame out control to shut down heater Foreign matter may also re quire you to cl
23. itch Cover Filler Neck Screen Tradename Decal Combustion Chamber Ground Wire HDi un nm oa oon nnn 00 2 an ND 2 2 ND ND OO ND MOZA PORTABLE FORCED AIR HEATERS ILLUSTRATED PARTS BREAKDOWN NTH150 150 000 BTU HR MODEL Motor and Pump Assembly 22 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 PARTS LIST NTH150 and description of the desired part 150 000 BTU HR MODEL PART NUMBER 09851 1 233 102432 01 098512 36 099229 01 HA3019 M27417 M10908 2 8 1 100735 11 8 2 M10659 1 8 3 M10809 1 8 4 M8882 8 5 M50924 08 8 6 M50820 02 8 7 104184 01 8 8 103409 01 9 102431 01 10 M50814 06 11 M51345 01 12 102042 01 13 13 1 102001 03 13 2 079975 03 13 3 FHPF3 6C 13 4 M22009 13 5 M22456 2 13 6 M50545 13 7 M12179 13 8 M16545 13 9 M8940 13 10 M10993 1 13 11 M27694 13 12 M22997 13 13 M12461 31 13 14 M12244 1 13 15 M12461 32 13 16 M11637 13 17 M50820 02 13 18 M8643 2 13 19 103229 01 14 M51114 01 PART DESCRIPTION Upper Shell Screw Lockwasher 1 2 Combustion Chamber Photocell Bracket Photocell Assembly Drain Plug Screw 46 32 x 3 8 Burner Head Assembly Nozzle Nozzle Seal Washer Nozzle Seal Spring Nozzle Seal Sleeve Burner Head Body Barb Fitting Spark Plug
24. ng Nozzle 50 70 100 150 000 Btu Hr Models Continued DU PORTABLE FORCEDAIR HEATERS SERVICE Blade Air Pump Intake PROCEDURES Filter Continued Filter End Pump Rotor Procedure if Rotor is Binding 1 Remove upper shell see page 8 kii i Fan Guard A AY ur 2 Remove filter end cover screws using 5 16 nut driver 3 Remove filter end cover and air filters mene Remove pump plate screws using 5 16 Air Output nut driver Filter 5 Remove pump plate 6 Remove rotor insert and blades Figure 25 Rotor Location 35 50 70 000 Btu Hr Models 7 Check for debris in pump If debris is found blow out with compressed air Blade Pump Install insert and rotor Plate Check gap on rotor Adjust to 076 101 mm 003 004 if needed see Fig ure 27 Note Rotate rotor one full turn to insure the gap is 076 101 mm 003 004 at tight est position Adjust if needed Air Intake Filter Filter End Cover Fan Guard 10 Install blades pump plate air filters and filter end cover Rotor 11 Replace fan guard and upper shell Air Output 12 Adjust pump pressure see page 10 Filter Note If rotor is still binding proceed as follows fap Penni ey LRP Nena DUNE Figure 26 Rotor Location 100 150 000 Btu Hr Models 14 Place fine grade sandpaper 600 grit on flat surface Sand rotor lightly in Gap Adjusting Screw figure 8 motion four times see Fig ure 28 15
25. ocal ordinances and codes when using heater Heaters used in the vicinity of tarpaulins canvas or similar enclosure materials shall be located a safe distance from such materials The recommended minimum safe distance is 304 8cm 10 feet It is further recommended that these enclo sure materials be of a fire retardant na ture These enclosure materials shall be securely fastened to prevent them from igniting or from upsetting the heater due to wind action Use only in well vented areas Before us ing heater provide at least a 2800 square cm three square foot opening of fresh outside air for each 100 000 Btu Hr of rating Use only in places free of flammable va pors or high dust content Use only the electrical voltage and fre quency specified on model plate Use only a three prong grounded exten sion cord Minimum heater clearances from com bustibles Outlet 250 cm 8 Ft Sides Top and Rear 125 cm 4 Ft Locate heater on a stable and level sur face if heater is hot or running or a fire may occur When moving or storing heater keep heater in a level position or fuel spillage may occur Keep children and animals away from heater Unplug heater when not in use When used with thermostat heater may start anytime Never use heater in living or sleeping areas Never block air inlet rear or air outlet front of heater Never move handle refuel or service a hot operating or plugged in
26. operation or once a year Wash and dry with soap and water every 500 hours of op eration or as needed Clean twice a heating season or as needed Clean and regap every 600 hours operation or replace as needed Clean every season or as needed Not required permanently lu bricated 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 TROUBLESHOOTING OBSERVED FAULT OWNER S MANUAL A WARNING Never service heater while it is plugged in operating or hot Severe burns and electrical shock can occur POSSIBLE CAUSE REMEDY Heater ignites but flame out control shuts off heater after a short period of time Wrong pump pressure Dirty air output air intake and lint filters See Pump Pressure Adjustment page 10 See Air Output Air Intake and Lint Filters page 10 3 Dirty fuel filter 3 See Fuel Filter page 8 4 Dirt in nozzle 4 See Nozzle page 11 5 Dirty photocell lens 5 Clean photocell lens 6 Bad flame out control 6 Replace flame out control Heater will not ignite but motor runs fora 1 Wrong pump pressure 1 See Pump Pressure Adjustment page 10 short period of time 2 Carbon deposits on spark plug and or 2 See Spark Plug page 9 improper gap 3 Dirty fuel filter 3
27. r to normal maintenance such as pressure adjustments or to normal maintenance parts such as filters and spark plugs Replacement or repair parts installed in the Product covered by this Warranty are warranted only for the remainder of this Warranty as if such parts were original compo nents of said Product NU TOOL MAKES NO OTHER EX PRESS WARRANTY TO THE EXTENT PERMITTED BY LAW NU TOOL MAKES NO IMPLIED WARRANTY AND MAKES NO WARRANTY OF MERCHANTABILITY OR FITNESS FOR ANY PARTICULAR PURPOSE IN ANY EVENT IMPLIED WARRANTIES INCLUDING THOSE OF MERCHANTABIL ITY AND FITNESS FOR A PARTICULAR PURPOSE ARE LIMITED TO THE DURATION OF THIS EXPRESS WAR RANTY Any transportation charges costs of installation duty taxes or any other charges whatsoever must be borne by the user NU TOOL s obligation under this limited Warranty shall not include any liability for direct indirect incidental or conse quential damage or delay If requested by NU TOOL products or parts for which a warranty claim is made are to be returned transportation prepaid by user to the factory Any improper use including operation after discovery of defective or worn parts operation beyond capacity substitution of parts not approved by NU TOOL or any alteration or repair by others in such manner as in NU TOOL s judgement affects the Product mate rially and adversely shall void this Warranty NO EMPLOYEE OR REPRESENTATIVE IS AUTHORIZED TO CHANGE THIS WARRANTY IN ANY WAY
28. s bushing Electronic Ignitor Screw 10 16 x 3 4 Terminal Board Rivet Flame Out Control Fuel Tank Cap Fuel Tank Side Cover Nut 10 32 Hex Nut Terminal Board Tab Cap Vinyl Foam Gasket Lock Washer 10 Wire Assembly black ON OFF Switch Switch Cover Filler Neck Screen Tradename Decal Combustion Chamber Ground Wire Sooo OO 4 DD po A a a ao ap PORTABLE FORCED AIR HEATERS ILLUSTRATED PARTS BREAKDOWN NTH50 50 000 BTU HR MODEL Burner Head Assembly 16 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 PARTS LIST NTH50 50 000 BTU HR MODEL PART NUMBER M51104 01 098511 231 102432 01 098512 55 M11084 29 M16660 M10908 2 HA3019 098872 03 100735 16 M10659 1 M10809 1 M8882 M51098 02 M50820 01 104184 01 102431 01 M30865 02 M50400 M51107 01 M50631 079010 33 101205 01 102001 19 079975 02 M22009 M22456 1 M29608 M29632 M29633 M29609 M12461 31 M8940 M10993 1 M27694 M22997 M29612 01 M12461 31 SOON OOAKRWNDN Not available as an assembly order parts separately 104976 PART DESCRIPTION Handle Upper Shell Screw Lockwasher 1 2 Combustion Chamber Screw 10 16 x 3 4 Photocell Bracket Screw 6 32 x 3 8 Photoc
29. side air ventilation before running heater Provide a fresh air opening of at least 2800 square cm three square feet for each 100 000 Btu Hr rating Provide extra fresh air if more heaters are being used Example A 150 000 Btu Hr heater requires one of the following e atwo car garage door 16 feet wide open ing raised 9 cm 3 2 inches e a single car garage door 9 feet wide opening raised 15 25 cm 6 inches e two 76 cm 30 inch windows raised 31 cm 12 inches 104976 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 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 The Ignition System The electronic ignitor sends voltage to the spark plug The spark plug ignites the fuel and air mixture The Flame Out Control System This system causes the heater to shut down if the flame goes out OWNER S MANUAL OPERATION WARNING Review and un derstand the warnings in the Safety Information Section They are needed to safely operate this heater Follow all local codes when using this heater TO START HEATER 1 Follow all ventilation and safety infor mation 2 Fill fuel t
30. umbers 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 We declare that the models noted are in conformity Company DESA International Inc Name Douglas D Rohrer Title Vice President Specialty Products Engineering 03 15 97 Bowling Green KY D Pluss Date and Place Signature 104976 25 WARRANTY INFORMATION CERTIFICATE OF GENERAL 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 any parts which appear to NU TOOL upon inspection to have been defective in material or workmanship when shipped from the factory Such parts shall be provided at no cost to the user at the business establishment of any factory authorized service center or the factory during regular working hours The Warranty shall not apply to component parts or accessories of Products not manufactured by NU TOOL and which carry the warranty of the manufacturer thereof o
31. ving Nozzle Assembly 35 000 Btu Hr Model Nozzle Face Nozzle Seal ky Nozzle Nozzle Adapter Air line Fitting Fuel line Fitting Figure 22 Nozzle and Nozzle Adapter 35 000 Btu Hr Model Nozzle 50 70 100 150 000 Btu Hr Models 1 Remove upper shell see page 8 2 Remove fan see page 13 3 Remove fuel and air line hoses from burner head 4 Remove spark plug wire from spark plug 5 Remove spark plug from burner head using 13 16 open end wrench 6 Remove three screws using 5 16 nut driver and remove burner head from combustion chamber 7 Place burner head into vise and lightly tighten 8 Carefully remove nozzle from burner head using 5 8 socket wrench see Fig ure 24 9 Blowcompressed air thru face of nozzle This will free any dirt in nozzle area 10 Inspect nozzle seal for damage 11 Replace nozzle into burner head and tighten firmly 9 1 12 4 n m 80 110 inch pounds 12 Attach burner head to combustion chamber 13 Install spark plug in burner head 14 Attach spark plug wire to spark plug 15 Attach fuel and airline hoses to burner head 16 Replace fan see page 13 17 Replace fan guard and upper shell Combustion Burner kt Head Spark Plug Screw Wire A 7 Spark Plug one H m Fuel Line Air Line Hose Hose Figure 23 Removing Burner Head 50 70 100 150 000 Btu Hr Models Nozzle Face Nozzle Fuel line Fitting Air line Fitting Figure 24 Removi
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