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112865-01A

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For more information, visit www.desatech.com

For more information, visit www.desatech.com

SAFETY INFORMATION

 WARNING: This product contains and/or generates

chemicals known to the State of California to cause
cancer or birth defects, or other reproductive harm.

IMPORTANT: Read this owner’s manual carefully and
completely before trying to assemble, operate, or ser-
vice this heater. Improper use of this heater can cause
serious injury or death from burns, fire, explosion,
electrical shock, and carbon monoxide poisoning.

 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, persons 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.

Use only kerosene, #1/#2 diesel/fuel oil, JET A or JP-8 fuels
to avoid risk of fire or explosion. Never use gasoline, naphtha,
paint thinners, alcohol, or other highly flammable fuels.

Fueling
a)

Personnel involved with fueling shall be qualified and thor-
oughly familiar with the manufacturer's instructions and ap-
plicable regulations regarding the safe fueling of heating units.

b)

Only the type of fuel specified on the heater's data plate
shall be used.

c)

All flame, including the pilot light, if any, shall be extin-
guished 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.

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 25 feet
(762cm) from heaters, torches, welding equipment, and
similar sources of ignition (exception: the fuel reservoir
integral with the heater unit).

g)

Whenever possible, fuel storage shall be confined to ar-
eas where floor penetrations do not permit fuel to drip
onto or be ignited by a fire at lower elevation.

h)

Fuel storage shall be in accordance with the authority hav-
ing jurisdiction.

Use only the electrical voltage and frequency specified on
model plate.

Heater must be grounded. Use only a properly grounded three-
wire extension cord. Plug into grounded outlet only.

Use only in areas free of flammable vapors or high dust content.

Minimum clearance from any combustible materials: 8 feet
(244 cm) from hot air outlet; 6 feet (183 cm) from top; and 4
feet (120 cm) from sides and inlet.

Locate heater on a stable and level surface while hot or operat-
ing or a fire may occur.

Use only in well-vented areas. Before using heater, provide at
least a three-square-foot (2800 square cm) opening of fresh,
outside air for each 100,000 Btu/Hr (30 kw) of rating.

Keep children and animals away from heater at all times.

Never start heater when combustion chamber is hot or if fuel
has accumulated in combustion chamber.

When used with thermostat, heater may start at anytime.

When heater is moved or stored, it must be in a level position
or fuel spillage may occur.

Use heater only in accordance with local ordinances and codes.

Never use gasoline, crankcase drainings, naphtha, paint
thinners, alcohol, or other highly flammable fuels.

Never use heater where gasoline, paint thinner, or other highly
flammable vapors are present.

Never use heater in living or sleeping areas.

Never leave a heater plugged in without adult supervision if
children or animals are likely to be present.

Never move, handle, refuel, or service a hot, operating, or
plugged-in heater.

Never attach duct work to front or rear of heater.

Never attach heater to external fuel tank.

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 10 feet
(304.8 cm). It is further recommended that these enclosure ma-
terials be of a fire retardant nature. These enclosure materials
shall be securely fastened to prevent them from igniting or
from upsetting the heater due to wind action.

Unplug heater when not in use.

Never block air inlet (rear) or air outlet (front) of heater.

SAFETY INFORMATION

Содержание M125TH

Страница 1: ...OR 5 STORING TRANSPORTING OR SHIPPING 5 PREVENTATIVE MAINTENANCE SCHEDULE 6 TROUBLESHOOTING 7 SERVICE PROCEDURES 8 SPECIFICATIONS 13 REPLACEMENT PARTS 13 TECHNICAL SERVICE 13 ACCESSORIES 13 ILLUSTRATED PARTS BREAKDOWN AND PARTS LIST 14 WHEELS AND HANDLE PARTS LIST 16 WIRING DIAGRAM 16 OWNER S REGISTRATION FORM 17 WARRANTY AND REPAIR SERVICE 20 Save this manual for future reference Save this manual...

Страница 2: ...ition exception the fuel reservoir integral with the heater unit g Whenever possible fuel storage shall be confined to ar eas where floor penetrations do not permit fuel to drip onto or be ignited by a fire at lower elevation h Fuel storage shall be in accordance with the authority hav ing jurisdiction Use only the electrical voltage and frequency specified on model plate Heater must be grounded U...

Страница 3: ...ause the ignition control assembly to shut down heater Foreign matter may also require heater s fuel system to be frequently cleaned WARNING Use only kerosene 1 2 diesel fuel oil JET A or JP 8 fuels to avoid risk of fire or explo sion Never use gasoline oil drained from crank cases naphtha paintthinners alcoholorotherhighly flammable fuels VENTILATION WARNING Provide a fresh air opening of at leas...

Страница 4: ...ed into nuts in the shroud Push the handle completely into the shroud 7 Tighten all scews THEORY OF OPERATION The Fuel System The air pump forces air through the air line The air is then pushed through the nozzle This air causes fuel to be lifted 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 andaroundthecombu...

Страница 5: ...peat steps under To Start Heater OPERATION IMPORTANT Review and understand the warnings in the Safety Information section page 2 They are needed to safely operate this heater Follow all local ordinances and codes when using this heater WARNING Before operating heater or any appli ance from a portable generator verify that generator has been properly connected to earth ground Im proper grounding or...

Страница 6: ...9 See Fan page 8 WARNING Never service heater while it is plugged in operating or hot Severe burns and electrical shock can occur Item Fuel tank Air output and lint filters Air intake filter Fuel filter Ignitor Fan blades Motor How Often Flushevery150 200hoursofoperationorasneeded Replace every 500 hours of operation or once a year Wash and dry with soap and water every 500 hours of operation or a...

Страница 7: ... CAUSE 1 No power to heater 2 ON OFF switch not in the ON position 3 Thermostat setting is too low 4 Bad electrical connection between motor and ignition control assembly or ignition control assembly and power cord 5 Binding pump rotor 6 Blown fuse GMA 10A on ignition con trol assembly 7 Defective ignition control assembly 8 Defective motor 1 No fuel in tank 2 Pump pressure incorrect 3 Dirty fuel ...

Страница 8: ...or shaft 3 Slip fan off motor shaft 4 Clean fan using a soft cloth moistened with kerosene or solvent 5 Dry fan thoroughly 6 Replace fan on motor shaft Place fan hub flush with end of motor shaft see Figure 7 7 Place setscrew on flat of shaft Tighten setscrew firmly 40 50 inch pounds 4 5 5 6 n m 8 Replace upper shell AIR OUTPUT AIR INTAKE AND LINT FILTERS 1 Remove upper shell see Figure 5 2 Remove...

Страница 9: ...ions below for correct pressure see Figure 10 6 Remove pressure gauge Replace pressure gauge plug in filter end cover SERVICE PROCEDURES Continued Figure 9 Pressure Gauge Plug Removal Pressure Gauge Figure 10 Adjusting Pump Pressure Relief Valve Pump Model Pressure 125TH 6 0 PSI FUEL FILTER 1 Removecontrolcoverscrewsusingmediumphillipsscrewdriver 2 Remove control cover 3 Pull upper fuel line off f...

Страница 10: ...mbly Combustion Chamber Photocell Bracket Photocell Assembly Air Line Hose Fuel Line Hose Ignitor Wire Ignitor Nozzle Adapter Bracket Ignition Control Assembly Control Cover Photocell Bracket Ignitor Nozzle Adapter Bracket Ignitor Element Combustion Chamber Nozzle Adapter Bracket Opening Figure 13 Ignitor Replacement SERVICE PROCEDURES Continued 9 Carefully guide ignitor into opening in nozzle ada...

Страница 11: ...Combustion Chamber Photocell Bracket Air Line Hose Nozzle Adapter Bracket Figure 15 Removing Nozzle Adapter Assembly Nozzle Adapter Assembly Combustion Chamber Figure 16 Nozzle and Nozzle Adapter Nozzle Face Nozzle Nozzle Sleeve Nozzle Adapter Air Line Fitting Fuel Line Fitting SERVICE PROCEDURES FUEL AND AIR LINE REPLACEMENT AND PROPER ROUTING 1 Remove upper shell see Upper Shell Removal page 8 2...

Страница 12: ... see Figure 18 8 Check for debris in pump If debris is found blow out with compressed air 9 Install insert and rotor 10 Check gap on rotor Adjust to 003 004 076 101 mm if needed see Figure 19 Note Rotate rotor one full turn to ensure the gap is 003 004 076 101 mm at tightest position Adjust if needed 11 Install blades pump plate air filters and filter end cover 12 Replace fan guard and upper shell...

Страница 13: ...ur address model and serial numbers of your heater how heater was malfunctioning purchase date Usually we will ask you to return the part to the factory PARTS NOT UNDER WARRANTY Contactauthorizeddealersofthisproduct Iftheycan tsupplyoriginal replacement part s call DESA Heating Products at 1 866 672 6040 for referral information Parts dealers are listed in the Authorized Service Center booklet sup...

Страница 14: ...125TH RH125TH ILLUSTRATED PARTS BREAKDOWN Models M125TH and RH125TH Motor and Pump Assembly 10 11 10 17 10 16 10 15 10 14 10 18 10 12 10 10 10 1 10 2 10 3 10 4 10 5 10 6 10 7 10 8 10 9 10 13 1 13 3 23 19 9 10 11 12 15 25 13 24 29 30 31 34 42 32 41 14 36 26 39 13 16 2 43 23 5 4 6 18 7 8 44 27 20 22 21 28 33 40 37 35 2 38 7 2 7 1 7 3 7 4 17 ...

Страница 15: ... 10 13 M12461 31 Screw 10 32 x 1 4 10 14 M12244 1 Output Filter 1 10 15 M11637 Lint Filter 1 10 16 104096 01 Fitting Straight Nylon Barb 1 10 17 M8643 Blade 4 10 18 M12461 31 Screw 10 32 x 1 6 11 M50631 Rubber Bumper 2 12 101206 01 Motor Mounting Bracket 1 13 M11084 29 Screw 10 16 x 3 4 11 14 104068 02 Ignition Control Assembly 1 15 NTC 4C Hex Lock Nut 1 4 20 2 16 108460 01 Fan Guard 1 17 M27417 D...

Страница 16: ... 108468 01 Washer 2 7 107426 01 Wheel Kit Contains 2 2 Wheels and Cap Nuts 8 M28526 Cap Nut 2 WHEELS AND HANDLE WIRING DIAGRAM WHEELS AND HANDLE WHEELS AND HANDLE PARTS LIST 1 2 6 5 7 8 3 4 WIRING DIAGRAM Power Plug 120V 60Hz Blue Blue White Photocell Ignition Control Assembly Green Black Black Green Red Black White White Motor Thermostat Photocell Photocell Ignitor Motor Return AC Neutral L2 120V...

Страница 17: ... Other ___________________________________ 12 Who selected the product Male Female Both 13 Level of Education of Purchaser High School Vocation Technical School Some College Completed College Graduate School 14 Age of Purchaser Under 20 20 29 30 39 40 49 50 59 60 or Over 15 Buyer s total annual household income Under 19 999 20 000 to 34 999 35 000 to 49 999 50 000 to 74 999 75 000 to 99 999 100 00...

Страница 18: ...2701 Industrial Drive P O Box 90004 Bowling Green KY 42102 9004 Postage Required TAPE TAPE ...

Страница 19: ...FORCED AIR HEATERS PROPANE TANK TOP HEATERS PROPANE AND NATURAL GAS GARAGE HEATERS PROPANE CONVECTION HEATERS PORTABLE KEROSENE FORCED AIR HEATERS PROPANE PATIO HEATERS PROPANE AND NATURAL GAS CHIMENEAS OTHER OUTDOOR HEATING PRODUCTS ...

Страница 20: ...tained free of charge Send a self addressed stamped envelope to the address listed below List the heater model number and the date located in the lower right corner of this page A service manual can be purchased from the address listed below Send a check for 5 00 payable to DESA Heating Products When writing for information regarding your heater be sure to include the model number and serial numbe...

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