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. 9. Replace nozzle into nozzle adapter until nozzle seat

3. Make sure unit is turned off by slightly depressing and turning control knob fully clockwise to OFF. 4. Open propane supply valve on propane tank(s) slowly. Note: If not opened slowly, excess-flow check valve on propane tank may stop gas flow. If this happens, you may hear a click inside the regulator assembly, this is the check valve closing. To reset the excess flow check valve, close propane supply valve and open again slowly. 5. Slightly depress and turn control knob counterclockwise to t

Decal13-14 M12244-1 Output Filter 1 (English) 1 13-15 M12461-31 Screw, #10-32 x 1" 6 100941-09 General Info. Decal13-16 13-17 13-18 14 15 16 17 18 M11637 M50820-02 M8643 M51114-01 M50631 M12461-13 098138-02 098165-04 Lint Filter Barb Fitting Blade Fan Guard Rubber Bumper Screw, #8-32 x 1/4" Motor and Relay Bracket Assembly Relay (motor start) 1 1 4 1 2 2 1 1 (Spanish) 1 **Not available as an assembly, order parts separately. 25 26 102748 ILLUSTRATED PARTS BREAKDOWN 44 kW (150,000 Btu/Hr) 13-1 13

Drain and flush fuel tank with clean kerosene. See Storage, page 8. Make sure electronic ignitor mounting is tight. Replace electronic ignitor. Press flame-out control reset button. Wait two minutes before trying to restart heater. If fan is hard to turn, see Pump Rotor, page 13. 9 10 099176 SERVICE PROCEDURES Air Output Filter Lint Filter Air Intake Filter Filter End Cover Air Output Filter Lint Filter Air Intake Filter Filter End Cover Fan Guard Figure 11 - Air Output, Air Intake, and Lint Fil

4. Replace air output and lint filters. 5. Wash or replace air intake filter (see Preventative Maintenance Schedule, page 8). 6. Replace filter end cover. 7. Replace fan guard and upper shell. IMPORTANT: Do not oil filters. 11 099176 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 7). Allow motor to reach full speed. 4. Adjust pressure. Turn relief valve to right to increa

6. Carefully remove nozzle from the nozzle adapter using 5/8" socket wrench. 7. Blow compressed air through face of nozzle. This will free any dirt in nozzle area. 8. Inspect nozzle seal for damage. 9. Replace nozzle into nozzle adapter until nozzle seats. Tighten 1/3 turn more using 5/8" socket wrench (4045 inch-pounds). 10.Attach nozzle assembly to burner strap. 11.Attach fuel and airline hoses to nozzle assembly. 12.Replace fan (see page 10). 13.Replace fan guard and upper shell. 45° Burner S

Decal13-17 M50820-02 Barb Fitting 1 (English, Black Shell) 1 13-18 M8643 Blade 4 100941-03 General Info. Decal14 M51114-01 Fan Guard 1 (Spanish, Black Shell) 1 15 M50631 Rubber Bumper 2 098234-50 General Info. Decal16 M12461-13 Screw, #8-32 x 1/4" 2 (English, Yellow Shell) 1 17 098138-02 Motor and Relay100941-06 General Info. Decal18 Bracket Asse098136-04 mbly Relay (motor start) 1 1 (Spanish, Yellow Shell) 1 **Not available as an assembly, order parts separately. 27 28 099623 1 2 3 4 5 7 8 9 10

Unplug extension cord from outlet. To Restart Heater 1. Wait two minutes after stopping heater. 2. Repeat steps under To Start Heater, page 7. 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. 2. Replace drain plug if used. 3. Add one gallon of clean kerosene to fuel tank. 4. Attach fuel cap. 5. Move heater forwards and b

When ordering parts, be sure to PARTS LIST provide the correct model and serial numbers (from the model plate), then the part number NTH35 and description of the desired part. 35,000 BTU/HR MODEL KEY NO. PART NUMBER PART DESCRIPTION QTY. KEY NO. PART NUMBER PART DESCRIPTION QTY. 1 2 3 4 5 6 7 8 9 10 1111-1 11-2 11-3 11-4 11-5 12 13 14 15 16 17 1818-1 18-2 18-3 18-4 18-5 18-6 18-7 18-8 18-9 M51104-01 098511-231 102432-01 098512-43 M51108-01 M11084-29 M16660 M10908-2 HA3019 098872-03 ** 097124-01

Note: Rotate rotor one full turn to insure the gap is .003"/.004" (.076/.101 mm) at tightest 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 14). Note: If rotor is still binding, proceed as follows. 13. Perform steps 1 thru 6 above. 14. Place fine grade sandpaper (600 grit) on flat surface. Sand rotor lightly in “figure 8” motion four times (see Figure 34). 15. Reinstall inser