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8

STORAGE

• 1 Lb. Propane cylinder(s) must be 

disconnected from heater when not in 
use.

• Indoor storage of the heater is permissible only if the cylinder is disconnected 

and removed from the heater. Cylinders must be stored outdoors out of the 
reach of children and must not be stored in a building, garage or any other 
enclosed area.

• If a 20 Lb. Propane cylinder is not disconnected from the heater, the heater 

and the cylinder must be stored outdoors, in a well ventilated space, out of 
reach of children, and must not be stored in a building, garage or any other 
enclosed area.

Figure 8

Pilot Flame

Oxygen Depletion 

Sensor

MAINTENANCE CLEANING AND INSPECTION PROCEDURE

1.  Allow heater to thoroughly cool before performing any maintenance.
2.  Remove disposable 1 lb. cylinder from heater or turn OFF gas supply at remote cylinder 

valve, and disconnect hose from heater.

3.  Remove (4) four screws that secure the rear cover to the Heater.
4.  Pivot cover outward from bottom. Release from 2 top clips. Set aside.
5.  Remove (4) four burner retaining screws and fuel line from burner assembly.
6.  Remove burner assembly from back of housing.
7.  Inspect interior of housing for accumulation of dust, insect or spider webs. If necessary, 

clean interior housing with a vacuum cleaner or apply air pressure. Do not damage any 
components within the housing assembly when you are cleaning.

8.  Inspect and clean main burner orifice (threaded into orifice holder). Orifice holder is 

attached to the burner assembly venturi with (2) two screws.

9.  Inspect and clean pilot (mounted to bracket) by using a vacuum or apply air pressure 

through the holes in the pilot indicated by the arrows in Figure 8. 

 WARNING

: Never use needles, wires, or similar cylindrical objects to clean the pilot 

to avoid damaging the calibrated orifice that controls the gas flow assembly.

10.  Apply air pressure (max. 30 psi) into ceramic tile of burner assembly and the venture 

tube to remove dust, lint or spider webs.

11.  Reassemble main burner orifice holder 

onto the burner.

12.  Reinstall burner assembly into the heater 

housing.

13.  Reinstall fuel line and check for leaks.
14.  Install heater back cover.

TROUBLESHOOTING

IF SPARK ELECTRODE DOES NOT PRODUCE SPARK
 CHECK

•  Spark electrode broken - replace ODS (Oxygen Depletion Sensor)
•  Igniter wire may not be attached to spark electrode
•  Igniter wire damaged - replace
•  Pulse Igniter Battery dead - replace AA battery

IF SPARK ELECTRODE PRODUCES SPARK BUT PILOT DOES NOT LIGHT.
 CHECK

•  No gas to heater - install disposable cylinder or connect hose and filter where 

required and turn on valve at remote cylinder.

•  “PILOT” position not properly aligned - turn gas control knob to “PILOT” position and 

depress.

•  Pilot is blocked from spider web or dirt - clean pilot (See MAINTENANCE beginning 

on page 7.)

IF PILOT FLAME DOES NOT STAY LIT WHEN KNOB IS RELEASED
 CHECK

•  Control knob in “PILOT” position not completely depressed or held in long enough to 

purge air from lines.

•  Pilot flame not surrounding thermocouple - clean pilot (See MAINTENANCE 

beginning on page 7.)

•  Pilot Assembly defective - replace
•  Tip switch wires disconnected - connect

IF MAIN BURNER DOES NOT IGNITE
 CHECK

•  Main burner orifice is blocked - clean burner (See MAINTENANCE beginning on page 

7.)

IF HEATER KEEPS SHUTTING “OFF” DURING NORMAL OPERATION
 CHECK

•  Pilot is blocked - clean pilot (See MAINTENANCE beginning on page 7.)
•  Provide minimum fresh air opening of 9 square inches (example, 3” x 3” opening)
•  Tip over switch activated from bumping heater. Re-light.
•  Regulator defective - Replace regulator.
•  Internal contamination - Replace control valve and regulator
•  Call Technical Services for additional information.

Summary of Contents for DXH12B

Page 1: ...il para uso recreativo y comercial DXH12B For CANADA and MASSACHUSETTS sale If you smell gas 1 Do not attempt to light appliance 2 Extinguish any open flames 3 Disconnect from fuel supply FOR YOUR SAFETY Do not store or use gasoline or other flammable vapors and liquids in the vicinity of this or any other appliance CARBON MONOXIDE HAZARD This appliance can produce carbon monoxide which has no odo...

Page 2: ...ntly hazardous situation which if not avoided will result in death or serious injury WARNING Indicates a potentially hazardous situation which if not avoided could result in death or serious injury CAUTION Indicates a potentially hazardous situation which if not avoided may result in minor or moderate injury NOTICE Indicates a practice not related to personal injury which if not avoided may result...

Page 3: ...ice technician When the unit is lit there should be about a quarter inch border around the tile that will not turn bright orange This is normal When operating the heater for the first time the top area of the reflector may discolor This is also normal and is no reason for concern The protective grill on the front of this heater is coated with a special high temperature resistant paint When the hea...

Page 4: ...r out the building and area before you return Properly trained service people must repair any leaks check for further leakages and then relight the appliance for you Odor Fading No Odor Detected Some people cannot smell well Some people cannot smell the odor of the man made chemical added to propane LP or natural gas You must determine if you can smell the odorant in these fuel gases Learn to reco...

Page 5: ...AND FIXED AT 11 W C WHEN USING A REMOTE HOSE CONNECTION DO NOT REGULATE OR REDUCE PROPANE TANK SUPPLY PRESSURE TO HEATER 13 Use only VAPOR WITHDRAWAL propane supply If there is any question about vapor withdrawal ask your propane dealer 14 Do not leave this appliance unattended while it is in operation Keep children and pets away from the appliance at all times 15 When heater is placed on the grou...

Page 6: ... This heater may be used with a remote refillable propane cylinder ONLY when the cylinder and heater are located outdoors and the Heater is used with Mr Heater Hose No F273701 F273702 or F272702 and fuel filter F273699 Fuel filter must be replaced annually Or use F273704 Buddy series hose Fuel filter not required DANGER NEVER bring a refillable propane cylinder indoors A fire or explosion can occu...

Page 7: ...harging Precautions and Instructions starting on page 9 The battery must be removed from the heater in order to charge Status Light Diagnostics Double Flash 2 Blinks 1 Pause If the Status Light is Double Flashing repetition of 2 rapid blinks followed by a pause this is an indication that the battery is outside of its operating temperature range Figure 4 Depressed Control Knob Figure 5 Released Con...

Page 8: ...lar cylindrical objects to clean the pilot to avoid damaging the calibrated orifice that controls the gas flow assembly 10 Apply air pressure max 30 psi into ceramic tile of burner assembly and the venture tube to remove dust lint or spider webs 11 Reassemble main burner orifice holder onto the burner 12 Reinstall burner assembly into the heater housing 13 Reinstall fuel line and check for leaks 1...

Page 9: ...amage to the electric plug and cord Make sure that the cord is located so that it will not be stepped on tripped over or otherwise subjected to damage or stress Do not use an extension cord unless it is absolutely necessary Use of improper extension cord could result in risk of fire electric shock or electrocution When operating a charger outdoors always provide a dry location and use an extension...

Page 10: ...tion which can be determined by turning the equipment off and on the user is encouraged to try to correct the interference by one or more of the following measures Reorient or relocate the receiving antenna Increase the separation between the equipment and receiver Connect the equipment into an outlet on a circuit different from that to which the receiver is connected Consult the dealer or an expe...

Page 11: ...until irritation ceases If medical attention is needed the battery electrolyte is composed of a mixture of liquid organic carbonates and lithium salts Contents of opened battery cells may cause respiratory irritation Provide fresh air If symptoms persist seek medical attention WARNING Burn hazard Battery liquid may be flammable if exposed to spark or flame The RBRC Seal The RBRC Rechargeable Batte...

Page 12: ...perature below 40 F 4 5 C or above 104 F 40 C This is important and will prevent serious damage to the battery pack 2 The charger and battery pack may become warm to the touch while charging This is a normal condition and does not indicate a problem To facilitate the cooling of the battery pack after use avoid placing the charger or battery pack in a warm environment such as in a metal shed or an ...

Page 13: ...od or theft your registration of ownership will serve as your proof of purchase FOR YOUR SAFETY Registering your product will allow us to contact you in the unlikely event a safety notification is required under the Federal Con sumer Safety Act Register Online at www dewalt com register Three Year Limited Warranty DeWALT will repair without charge any defects due to faulty materials or workmanship...

Page 14: ...English 14 2 1 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 34 35 32 33 ...

Page 15: ...et Tube Assy 29 Heat Shield Assy 30 Fan Cover 31 Fan 32 Back Cover 33 Battery Dock 34 Button 35 Button Cover F273699 Fuel Filter Accessory Not Included Description F273701 5 ft PROPANE HOSE ASSEMBLY Swivel 1 20 Male Throw away Cyl Thd X P O L w Handwheel F273702 12 ft PROPANE HOSE ASSEMBLY Swivel 1 20 Male Throwaway Cyl Thd X P O L w Handwheel F272702 12 ft PROPANE HOSE ASSEMBLY Swivel 1 20 Male T...

Page 16: ...RMATION REGARDING SERVICE Please call Toll Free 855 805 5745 www dewalt com Our office hours are 8 00 AM 5 00 PM EST Monday through Friday Please include the model number date of purchase and description of problem in all communication LIMITED WARRANTY DeWalt warrants its heaters and accessories to be free from defects in mate rial and workmanship for a period of 1 year from date of purchase DeWal...

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