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

This will protect your warranty coverage for parts replaced under warranty. Parts Under Warranty Contact authorized retailers of this product. If they can not supply original replacement part(s), call DESA’s Customer Service Department at 1-866-672-6040. When calling DESA, have ready • your name • your address • model and serial numbers of your fireplace • how fireplace was malfunctioning • type of gas used (propane/LP or natural gas) • purchase date Usually, we will ask you to return the part t

Mantel Depth Ref. Mantel from Top of Louver Opening 1 14" A 16" 2 12" B 14" 3 10" C 12" 4 8" D 10" 5 6" E 8" 6 4" F 6" 7 2" G 4" 411/4" (36") 481/4" (42") 21" Hor. Vent 241/2" Vert. Vent 36" 23" Hor. Vent 26 1/2" Vert. Vent 42" Figure 4 - Framing Clearances for Installation Against an Exterior Wall Figure 6 - Clearances for Combustible Mantels Location of Termination Cap FixedClosedOpenableFixedClosedVVVVVVVVXXVXGGJFBBKNHIANELDBMACBVVAGGBTERMINATION CAPAIR SUPPLY INLETGAS METERRESTRICTED AREA(TE

7. Replace side cover. SERVICE PROCEDURES WARNING: Never service heater while it is plugged in, operating, or hot. Severe burns and electrical shock can occur. Upper Shell Fan Guard Figure 7 - Upper Shell Removal, 35/50/ 70,000 Btu/Hr Models Figure 8 - Upper Shell Removal, 100/ 150,000 Btu/Hr Models Fuel Filter Side Cover Fuel Line Fan Guard Upper Shell Fuel Filter, Bushing, and Lower Fuel Line Upper Fuel Line Side Cover Figure 10 - Fuel Filter Removal, 100/150,000 Btu/Hr Models OWNER’S MANUAL S

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

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

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 Figure 5 - Flame-Out Control Reset Button, 35/50/70,000 Btu/Hr Flame-Out Control Reset Button ON/OFF Switch Figure 6 - Flame-Out Control Reset Button, 100/150,000 Btu/Hr 104976 5 PORTABLE FORCED AIR HEATERS STORING, TRANSPORTI

When ordering parts, be sure to PARTS LIST provide the correct model and serial numbers (from the model plate), then the part number NTH150 and description of the desired part. 150,000 BTU/HR MODEL KEY NO. PART NUMBER PART DESCRIPTION QTY. KEY NO. PART NUMBER PART DESCRIPTION QTY. 1 2 3 4 5 6 7 88-1 8-2 8-3 8-4 8-5 8-6 8-7 8-8 9 10 11 12 1313-1 13-2 13-3 13-4 13-5 13-6 13-7 13-8 13-9 13-10 13-11 13-12 13-13 13-14 13-15 13-16 098511-233 102432-01 098512-36 099229-01 HA3019 M27417 M10908-2 ** 1007

Contact a qualified service person to do this. All local codes must be followed. ! WARNING Fan accessory must be grounded. Fan comes with a three-prong, grounding plug as shown in Figure 1. The plug is your protection against electrical shock. Plug it into a standard, three-hole, grounded, outlet. If cord needs replacing, use only a cord with a three-prong, grounding plug. Grounding Plug Grounded Outlet Figure 1 - Grounding Plug Attaching Fan Accessory 1. Knock out center panel at four tabs with

Product covered by this Warranty are warranted only for the remainder of this Warranty as if such parts were original compo-NO EMPLOYEE OR REPRESENTATIVE IS AUTHORIZED nents of said Product. DESA INTERNATIONAL MAKES NO TO CHANGE THIS WARRANTY IN ANY WAY OR GRANT OTHER EXPRESS WARRANTY. TO THE EXTENT PERMIT-ANY OTHER WARRANTY UNLESS SUCH CHANGE IS TED BY LAW DESA INTERNATIONAL MAKES NO IMPLIED MADE IN WRITING AND SIGNED BY AN OFFICER OF DESA WARRANTY AND MAKES NO WARRANTY OF MER-INTERNATIONAL AT