Desa Tech B350D, B600D, R350A, R600A, SB350D Owner's Manual

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Page 1

KEROSENE HIGH PRESSURE

PORTABLE FORCED AIR HEATERS

OWNER’S MANUAL

TABLE OF CONTENTS

Safety Information ............................................... 2

Product Identiﬁcation ........................................... 3

Unpacking ........................................................... 3

Operation ............................................................. 3

Fuels .................................................................... 4

Ventilation

Operation ............................................................ 4

Storing, Transporting of Shipping ........................ 5

Operation with Portable Generator ...................... 6

Preventative Maintenance Schedule ................... 6

........................................................... 4

Troubleshooting ................................................... 7

Service Procedures ........................................... 10

Illustrated Parts Breakdown and Parts List ....... 14

Speciﬁcations

Wiring Diagram .................................................. 21

Maintenance Kits .............................................. 22

Technical Service .............................................. 22

Accessory .......................................................... 22

Replacement Parts ............................................ 22

Warranty

................................................... 21

and Repair Services .............Back Cover

Fill In For Your Records

Model No. _____________________

(Located on side panel)

Serial No. ______________________ (Located on fuel tank)

Date of Purchase: _______________

Save this manual for future reference.

For more information, visit www.desatech.com

Page 2

SAFETY INFORMATION

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

WARNING: This product contains and/or generates chemicals known to the State of California to cause cancer or birth defects or other reproductive harm.

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 nausea. 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 warn ings. Keep this manual for reference. It is your guide to safe and proper operation of this heater.

1. 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.

2. Fueling

a) Personnel involved with fueling shall be

qualiﬁed and thoroughly familiar with the manufacturerʼs instructions and applicable federal, state and local regulations regarding the safe fueling of heating units.

b) Only the type of fuel speciﬁed on the heaterʼs

data plate shall be used.

c) 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.

e) At no time shall more than one dayʼs 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 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 areas 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 federal, state or local authority having jurisdiction.

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

4. Follow all local ordinances and codes when using heater.

5. 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. It is further recommended that these enclosure materials 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.

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

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

8. Use only with the electrical voltage and fre quency speciﬁed on model plate.

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

10. Minimum heater clearances from combustibles:

Outlet: 8 Ft. Sides: 4 Ft.

Top: 4 Ft. Rear: 4 Ft.

11. Locate heater on a stable and level surface while hot or running or a ﬁre may occur.

12. When moving or storing heater, keep heater in a level position or fuel spillage may occur.

13. Keep children and animals away from heater.

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

15. Unplug heater when not in use.

16. This heater has a built-in thermostat. Pluggedin heater may start at anytime.

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SAFETY INFORMATION

Continued

17. Never use heater in living or sleeping areas.

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

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

20.

Never attach duct work to front or rear of heater.

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

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

23. Warning to New York City Residents For

Use Only At Construction Sites

cordance with applicable NYC codes under NYCFD certiﬁcate of approval #4803, #4899, #4908, #4909 or #4934 or NYC Board of Standards and Appeals calendar number 62-59-5A.

in ac-

PRODUCT

IDENTIFICATION

Hot Air Outlet

Lower Shell

Upper Shell

UNPACKING

1. Remove all protective packing applied to heater for shipment.

2. Remove heater from shipping container.

3. Check heater for any shipping damage. If heater is damaged, promptly inform dealer where you bought heater.

OPERATION

The Fuel System: The motor turns the fuel pump.

The fuel pump pulls fuel from the fuel tank. The fuel pump pushes fuel through a ﬁlter and a solenoid valve and out the burner head nozzle. 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. It also allows the fan to continue running after normal shutdown of heater. This cools the combustion chamber.

Fuel

Pickup

Line

Fuel

Cool

Air In

Fuel Pump/

Fuel

Cap

Tank

Thermostat

Figure 1 - 350,000 Btu/Hr Model

Hot Air Outlet

Lower Shell

Fuel Cap

Fuel Tank Flame-Out Control Reset Button

Figure 2 - 600,000 Btu/Hr Model

110098-01F 3

Flame-Out Control Reset Button

Upper Shell

Thermostat

Power Cord

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Fuel Filter

Motor

Fan

Solenoid Valve

Burner

Head

Spark

Plug

Combustion

Chamber

Clean

Heated

Air Out

Figure 3 - Cross Section Operational

View

Filter

Electronic

Ignitor

Fuel

Fuel Line To

Solenoid Valve

Air for

Combustion

Nozzle

Fuel Tank

and Heating

Page 4

FUELS

WARNING: 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.

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

• the need of non-toxic anti-icer in fuel during very cold weather

IMPORTANT: Use a KEROSENE ONLY storage container. Be sure storage container is clean. Foreign matter such as rust, dirt or water will cause ﬂame-out control to shut down heater. Foreign matter may also require you to clean fuel system often.

VENTILATION

WARNING: Follow the minimum fresh, outside air ventilation requirements. If proper fresh, outside air ventilation is not provided, carbon monoxide poisoning can occur. Provide proper fresh, outside air ventilation before running heater.

Fresh Air Opening Requirements Heater Size Square Feet Opening

350,000 Btu/Hr 10.5 600,000 Btu/Hr 18.0 Note: If you use more than one heater, provide extra

fresh air. Provide a fresh air opening of at least three square feet for each 100,000 Btu/Hr rating.

OPERATION

WARNING: Review and understand the warnings in the Safety Information section, page 2. They are needed to safely operate this heater.

TO START HEATER

1. Follow all ventilation and safety information.

2. Locate heater to provide maximum circulation of the heated air. Follow all location require ments noted in Safety Information, page 2.

3. Fill fuel tank with kerosene, #1#2 diesel/fuel oil, JET A or JP-8 fuels.

4. Attach fuel cap.

5. Set thermostat dial to desired temperature. Note: Thermostat setting must be higher than surrounding air temperature.

6. Plug power cord of heater into three-prong, grounded extension cord. Extension cord must be at least six feet long.

WARNING: Use only a threeprong, grounded extension cord. Use cord with proper wire size to assure 120 volt operation. See Extension Cord Wire Size Requirements below.

Extension Cord Wire Size Requirements

6 to 100 feet long, use 14 AWG rated cord 101 to 200 feet long, use 12 AWG rated cord 201 to 300 feet long, use 10 AWG rated cord 301 to 400 feet long, use 8 AWG rated cord 401 to 500 feet long, use 6 AWG rated cord

7. Plug extension cord into standard 120 volt/60 hertz, three-hole, grounded outlet.

8. The motor will start when extension cord is plugged into outlet. The heater should ignite at once. If heater does not ignite, restart heater. To restart heater, wait 60 seconds, then push in ﬂame-out control reset button. Flame-out control reset button is at rear of heater near power cord (see Figure 4, page 5).

Note: A cold heater may affect the thermostat setting. This thermostat is a general-heating control. It is not intended for precise temperature control. Adjust ther mostat until heater cycles at the desired setting.

Note: If starting heater for ﬁrst time, you may need to prime the pump. If equipped, slightly open bleed er valve of pump to allow air to escape. Quickly close valve once fuel is seen. Wipe up any excess fuel. If equipped with canister fuel ﬁlter, remove the canister bottom and ﬁll with fuel. Reassemble ﬁlter. Wipe up any excess fuel. You may also have to do this after taking heater out of storage.

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Page 5

OPERATION

Continued

Flame-Out Control Reset Button

Figure 4 - Flame-Out Control Reset

TO STOP HEATER

CAUTION: Never unplug heater while heater is running. Heater must go through purge cycle. The purge cycle cools the combustion chamber. Damage to heater can occur if combustion chamber is not cooled. Do not restart heater until purge cycle is complete.

1. Turn thermostat dial to lowest temperature setting. This will cause heater ﬂame to go out. The motor will continue to run during the purge cycle. This allows the fan to cool the combustion chamber. When the purge cycle is ﬁnished, the motor will stop. Do not unplug heater until purge cycle is ﬁnished.

2. Unplug extension cord from outlet.

3. To temporarily a temperature lower than air around heater. Heater will cycle back on if air temperature around heater matches thermostat setting.

TO RESTART HEATER

Button

stop heater, set thermostat at

STORING,

TRANSPORTING OF

SHIPPING

Note: If shipping transport companies require fuel tanks to be empty.

1. Drain all fuel from fuel lines and pump/ﬁlter (see Fuel Filters, page 12).

2. Clean and ﬂush fuel ﬁlter in fuel pump if equipped (see Fuel Filters, page 12).

3. Remove drain plug and drain fuel tank.

4. Replace drain plug.

5. 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 during future use.

6. Replace fuel cap or drain plug. Properly dis pose of old and dirty fuel. Check with local automotive service stations that recycle oil.

7. Add two gallons (350,000 Btu/Hr) or three gallons (600,000 Btu/Hr) of clean kerosene, #1#2 diesel/fuel oil, JET A or JP-8 fuels to fuel tank.

8. Replace fuel cap.

9. Operate heater for 5 minutes (see page 4).

10. Stop heater and let cool completely.

11. Remove drain plug and drain fuel tank.

12. Replace drain plug.

13. Properly dispose of old and dirty fuel.

14. If storing, store heater in a dry location. 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.

Operation,

CAUTION: Do not restart heater until purge cycle is ﬁnished. The purge cycle cools the combustion chamber.

1. Wait until purge cycle is ﬁnished after stopping heater.

2. Repeat steps under To Start Heater

110098-01F 5

, page 4.

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Page 6

FUEL

OPERATION WITH

PORTABLE GENERATOR

If the voltage does not measure in this range the heater should not be plugged into the generator.

Operation, page 4, for starting, stopping

Refer to and resetting heater procedures.

WARNING: Before operating

heater or any appliance from a

Alternator

portable generator, verify that generator has been properly connected to earth ground. Improper grounding or failure to ground generator can result in electro

cution if a ground fault occurs. Refer to owner’s manual supplied by generator manufacturer for proper grounding procedures.

The operating voltage range of the heater is 108 to 132 Volts (120 Volts +/- 10%). Prior to plugging heater into generator the output voltage should be veriﬁed (if generator is equipped with the au tomatic idle feature, the output voltage should be measured with the generator running at full speed).

Figure 5 - Typical Generator Grounding

Method (Generator construction may

Ground Lug

vary from that shown)

Ground Wire (#10 AWG - Stranded-Copper)

PREVENTATIVE MAINTENANCE SCHEDULE

WARNING: Never service heater while it is plugged in, operating

or hot. Severe burns and electrical shock can occur.

Item

Fuel tank

How Often

Flush every 150-200 hours of operation or as needed

How To

See Storing,

, page 5

Copper or Brass Grounding Point

Filler neck screen

Fuel ﬁlter assembly (Fuel tank)

Fuel ﬁlter lines

Fuel ﬁlter (In pump or ex ternal canister)

Spark plug

Fan blades and air deﬂectors

Air passages around burner head

Motor

Check for particles in fuel when ﬁlling fuel tank. Clean when dirty

Clean twice a heating season or replace as needed

Check and tighten loose connections occasionally

Clean fuel ﬁlter element every 250

hours

Clean and regap every 300 hours of operation or replace as needed

Clean each season or as needed

Check each season for dirt and debris

Not required, permanently lubricated

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Lift out of fuel tank and rinse with clean kerosene

See Fuel Filters, page 12

See Fuel Lines, Page 12

See Fuel Filters, page 12

See Spark Plug, page 10

See Fan Blades and Air Deﬂec- tors, page 10

Remove debris and trash with a clean, soft cloth

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Page 7

TROUBLESHOOTING

WARNING: Never service heater while it is plugged in, operating or hot. Severe burns and electrical shock can occur. Only a qualiﬁed service person should service and repair heater.

OBSERVED PROBLEM

Motor does not start when heater is plugged in and thermostat set ting is higher than surrounding air temperature

POSSIBLE CAUSE

1. No power or low voltage at

heater due to:

A) Damaged power cord or

extension cord B) Wrong size extension cord C) Heater plugged into outlet

with voltage lower than 120

volt

2. Loose electrical connections

3. Motor ove rload pro tector

tripped due to: A) Dirty fan B) Debris pulled into fan area

by fan C) Binding pump D) Low voltage

4. Flame-out control not reset

5. Damaged ﬂame-out control

6. Damaged power relay

7. Damaged thermostat

8. Binding pump

REMEDY

1. A) Check condition of power cord or extension cord. Repair or replace if damaged

B) Use extension cord with

proper wire size (see To Start Heater, page 4)

C) Make sure heater is plugged

into 120 volt/60 hertz outlet

2. Check connections. Tighten if loose

3. A) See Fan Blades and Air Deﬂectors, page 10

B) Remove debris from fan

and fan guard area

C) Turn fan by hand. If fan is

hard to turn, see Pump, page 12

D) See steps B and C under

item 1 above

Note: Be sure to reset motor

overload protector by pressing reset button on top of motor

4. Press and release ﬂame-out co nt ro l re se t butt on . See Figure 4, page 4 for button location

5. Replace ﬂame-out control

6. Replace power relay

7. Replace thermostat

8. Turn fan by hand. If fan is hard to turn, see Pump, page 12

110098-01F 7

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Page 8

OBSERVED PROBLEM

Heater will not ignite, but motor runs for a short period of time.

TROUBLESHOOTING

Continued

POSSIBLE CAUSE

1. A) Fuel tank empty B) Water in fuel C) Wrong fuel

2. Dirt in nozzle

3. Very low temperature may cause fuel to thicken and not ﬂow

4. Dirty fuel ﬁlters

5. Wrong pump pressure

6. Spark plug wire disconnected from plug

7. Spark plug problems due to:

A) Wrong gap B) Plug wet with fuel C) Carbon deposits on plug D) Damaged plug

8. Solenoid valve not opening

REMEDY

1. A) Add fuel to tank B) Check fuel tank for bubbles

of water in bottom. If found, remov e fue l (see Storing,

Transporti ng, or

page 5). Clean tank and fuel ﬁlters (see Fuel Filters, page

12). Fill with clean fuel

C) Remove wrong fuel (see

Storing, Transporting, or ping, page 5). Clean tank and

fuel ﬁlters (see Fuel Filters page 12). Fill with correct fuel

2. Replace nozzle (see Nozzle, page 10)

3. Move heater to warmer place until fuel ﬂows freely

4. Clean fuel filters (see Fuel Filters, page 12)

5. Adjust pump pressure (see Pump Pressure Adjustment sections, page 11)

6. Connect spark plug wire to spark plug

7. A) Adjust electrode gap to .075" (see Spark Plug, page 10)

B) Clean fuel from spark plug

with clean, soft cloth

C) Replace plug if heavily

coated with carbon (see Spark Plug, page 10)

D) Inspect plug for worn or

eroded electrodes. If found, replace plug (see Spark Plug, page 10)

8. Check electrical connections and voltage to solenoid. If good, replace solenoid valve

Shipping,

Ship-

WARNING: High Voltage!

9. Damaged electronic ignitor

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9. Replace electronic ignitor

110098-01F

Page 9

OBSERVED PROBLEM

Heater ignites, but flame-out control shuts off heater after a short period of time

TROUBLESHOOTING

Continued

POSSIBLE CAUSE

1. Wrong pump pressure

2. Dirty fuel ﬁlters

3. Dirt in nozzle

4. Dirty photocell lens

5. Open or damaged photocell

6. Bad ﬂame-out control

7. Damaged fan switch

REMEDY

1. Adjust pump pressure (see

Pump Pressure Adjustment

sections, page 11)

2. Clean fuel filters (see Fuel Filters, page 12)

3. Replace nozzle (see Nozzle page 10)

4. Cle an pho tocell lens with clean cotton swab

5. Replace photocell

6. Replace ﬂame-out control

7. Replace fan switch

Heater burns, but puffs of smoke can be seen Heater does not burn steady Heater burns with odor Heater smokes continuously

1. Wrong pump pressure

2. A) Heater almost out of fuel B) Water condensation in fuel

tank

C) Wrong fuel

3. Dirty fuel ﬁlters

4. Air leak in suction system

5. Dirty nozzle

6. Low voltage causing motor to operate below rated speed

7. Loose fuel line

1. Adjust pump pressure (see

Pump Pressure Adjustment

sections, page 11)

2. A) Add fuel to tank B) Check fuel tank for bubbles

of water in bottom. If found, remov e fue l (se e Sto ring,

Tran spo rti ng, or Shipping

page 5). Clean tank and fuel ﬁlters (see Fuel Filters, page

12). Fill with clean fuel

C) Remove wrong fuel (see

Storing, Transporting, or Ship ping, page 5). Clean tank and

fuel ﬁlters (see Fuel Filters, page 12. Fill with correct fuel

3. Clean fuel filters (see Fuel Filters, page 12)

4. Tighten all fuel line connections (see Fuel Lines, page 12)

5. Replace nozzle (see Nozzle page 10)

6. Check voltage at heater. Volt age at heater should be not less than 90% of rated voltage (10 8V minimum for 120V heaters)

7. Check and tighten all fuel line connections (see Fuel Lines, page 12)

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Page 10

SERVICE PROCEDURES

WARNING: Never service heater while it is plugged in, operating or hot. Severe burns and electrical shock can occur. Only a qualiﬁed service person should service and repair heater.

UPPER SHELL REMOVAL

1. Remove screws along each side and top of heater using 5/16" nut-driver. These screws attach upper and lower shells together (see Figure 6).

2. Lift upper shell off.

Upper Shell

Figure 6 - Upper Shell Removal,

600,000 Btu/Hr Model

FAN BLADES AND AIR DEFLECTORS

1. Re mo ve upp er she ll (se e Up pe r Sh el l Removal).

2. Clean fan blades and air deﬂectors with clean, soft cloth moistened with kerosene or solvent (see Figure 7).

3. Dry fan blades and air deﬂectors thoroughly.

4. Replace upper shell.

Air Deﬂector

Fan Blade

SPARK PLUG

1. Re mo ve upp er she ll (se e Up pe r Sh el l Removal).

2. Remove spark plug wire from spark plug (see Figure 8).

3. Remove spark plug from burner head using 13/16" open-end wrench (see Figure 8).

4. Replace spark plug if damaged or heavily coated with carbon.

5. Clean and regap spark plug electrodes to .075 inch (see Figure 9).

6. Install spark plug in burner head.

7. Attach spark plug wire to spark plug.

8. Replace upper shell.

Burner Head

Figure 8 - Spark Plug Removal

Figure 9 - Spark Plug Gap

Spark Plug

Spark Plug Wire

.075 inch

NOZZLE

Remove upper shell (see Upper Shell Removal).

2. Remove fuel line from solenoid valve using 7/16" wrench.

3. Remove spark plug wire from spark plug.

4. Remove spark plug from burner head using 13/16" open-end wrench.

5. Remove ﬁve screws using 5/16" nut-driver and remove burner head from combustion chamber.

6. Place burner hea d into vise and lightly tighten.

7. Carefully remove nozzle from burner head using 5/8" socket wrench (see Figure 10).

Plug

Spark Plug

Figure 7 - Fan Blades and Air Deﬂectors

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Nozzle

Burner Head

Fuel Line

Figure 10 - Replacing Nozzle

Spark Plug Wire

Solenoid Valve

110098-01F

Page 11

SERVICE PROCEDURES

psi

Continued

8. Inspect nozzle for damage. If damaged or clogged, replace nozzle.

9. Make sure plug is in place on burner head.

10. Replace nozzle into burner head and tighten ﬁrmly (175-200 inch-pounds).

11. Attach burner head to combustion chamber.

12. Install spark plug in burner head.

13. Attach spark plug wire to spark plug.

14.

Attach fuel line to solenoid valve. Tighten ﬁrmly.

15. Replace upper shell.

PUMP PRESSURE ADJUSTMENT FOR HEATERS WITH FUEL FILTER/ CANISTER EXTERNAL TO PUMP

1. Remove pressure gauge plug from fuel pump port marked “GAUGE.”

2. Install accessory pressure gauge (part num ber 110380-01) to fuel pump port marked “GAUGE” (see Figure 11).

3. Start heater (see motor to reach full speed.

4. Adjust pressure. Use small ﬂat blade screw driver to turn slotted screw at fuel pump pres sure adjusting port. Turn screw clockwise to increase pressure. Turn screw counterclockwise to decrease pressure. See speciﬁcations in Figure 11 for correct pressure for each model.

5. Stop heater (see page 5).

6. Remov e pre ssu re gauge. Replac e pre s sure gauge plug in fuel pump port marked “GAUGE.”

Model Pump Pressure

350,000 Btu/Hr 100 PSI 600,000 Btu/Hr 110 PSI

Operation, page 4). Allow

PUMP PRESSURE ADJUSTMENT FOR HEATERS WITH FUEL FILTER INTERNAL TO PUMP

1. Remove pressure gauge plug from fuel pump port marked “GAUGE.”

2. Install accessory pressure gauge (part number 110380-01) to fuel pump port marked “GAUGE” (see Figure 12). Do not use bleeder valve port to check the pressure. The bleeder valve port contains pressure higher than operating pressure. Setting pump pressure with gauge in the bleeder valve port results in wrong operating pressure.

3. Start heater (see Operation, page 4). Allow motor to reach full speed.

4. Adjust pressure. Use small ﬂat blade screw driver to turn slotted screw at fuel pump port at top right side of pump. Turn screw clockwise to increase pressure. Turn screw counterclockwise to decrease pressure. See speciﬁcations in Figure 12 for correct pressure

for each model.

5. Stop heater (see page 5).

6. Remov e pre ssu re gauge. Replac e pre s sure gauge plug in fuel pump port marked “GAUGE.”

Model Pump Pressure

350,000 Btu/Hr 100 PSI 600,000 Btu/Hr 110 PSI

Pressure Gauge

Fuel Pump Port Marked “GAUGE”

Pressure Adjustment Port

Figure 12 - Adjusting Pump Pressure

Pressure Gauge

Fuel Pump Port Marked “GAUGE”

Fuel Pump Port Marked “PRESS ADJ”

Figure 11 - Adjusting Pump Pressure

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Page 12

SERVICE PROCEDURES

Continued

PUMP (Procedure if Pump is Binding)

1. Remove upper shell (see Upper Shell Removal, page 10).

2. Loosen hex screw on ﬂange clamp at rear of motor with 5/16" nut-driver (see Figure 13).

3. Turn fan with hand (see Figure 14).

4. If fan turns freely, tighten screw on ﬂange clamp.

5. If fan does not turn freely, replace pump.

6. Replace upper shell.

FUEL LINES (Procedure for Tightening Fuel Lines)

1. Remove upper shell (see Upper Shell Removal, page 10).

2. Use an adjustable wrench as a backup on ﬁttings.

3. Use 7/16" wrench and tighten fuel lines at solenoid valve, pump and fuel ﬁlter canister (if equipped) (see Figures 15 and 16).

Burner Head

Hex Screw On Flange Clamp

Figure 13 - Location of Screw on

Flange Clamp

Figure 14 - Turning Fan with Hand

Fuel Line

Solenoid Valve

Figure 15 - Fuel Line at Solenoid Valve

Fuel Pump

Fuel Lines

Figure 16 - Fuel Lines at Pump

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110098-01F

Page 13

SERVICE PROCEDURES

Continued

FUEL FILTERS

A. Tank Fuel Filter

1. Disconnect fuel lines from pump and fuel ﬁlter canister (if equipped) with 7/16" wrench (see Figures 17 or Figure 18 on page 13).

2. Carefully pry fuel ﬁlter loose from fuel tank with ﬂat end of screwdriver.

3. Inspect fuel ﬁlter for water or dirt.

4. Rinse fuel ﬁlter and fuel lines with clean kerosene.

5. Replace fuel ﬁlter into fuel tank.

6. Connect fuel lines to pump and fuel ﬁlter canister (if equipped).

B. For Heaters With Fuel Filter/Canister External To Pump

1. Unscrew canister bottom from canister top with adjustable pliers.

2. Remove fuel ﬁlter and gasket from canister bottom (see Figure 18).

3. Inspect canister bottom and fuel ﬁlter for water droplets or dirt.

4. Rinse canister bottom in clean kerosene.

5. Wipe inside of canister bottom dry with clean cloth.

6. Rinse fuel ﬁlter in clean kerosene.

7. Put clean fuel ﬁlter and gasket back in canister bottom.

8. Screw canister bottom into canister top.

9. Tighten securely. Check for leaks.

C. For Heaters With Fuel Filter Internal To Pump

1. Remove pump cover to access ﬁlter

2. Rinse and wipe inside of pump cover and dry with clean cloth.

3. Rinse fuel ﬁlter in clean kerosene or blow compressed air from inside out.

4. Reassemble. Tighten securely. Check for leaks.

Fuel Pump (Filter Under Cover)

Fuel Lines

Fuel Filter

Figure 17 - Removing Tank Fuel Filter

Canister Top

Gasket

Fuel Filter

Fuel Lines

Figure 18 - Fuel Pump Filter and Canister

Fuel Filter

Pump Cover

Figure 19 - Fuel Pump and Filter

Canister Bottom

110098-01F 13

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ILLUSTRATED PARTS BREAKDOWN

MODELS B350D, SB350D AND R350A

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This list contains replaceable parts used in your heater. When ordering parts, follow the instructions

PARTS LIST

listed under Repair Service on the back page of this manual.

MODELS B350D, SB350D AND R350A

KEY NO. PART NO. DESCRIPTION QTY.

1 108436-02 Upper shell model B350D/SB350D (Yellow) 1 108436-01 Upper shell model R350A (White) 1 2 M11084-27 Screw, #10-16 x 1/2" 15 3 M50542-01 Combustion chamber & shield 1 4 M30865-02 Bushing 7 5 M50086 Air deﬂector 5 6 ** Burner head assembly 1 7 M16656-17 Photocell assembly 1 8 M50121 Fan 1 9 108446-01 Fan guard 1 10 M51336-02 Fan switch 1 11 M51160-01 Fan switch cover 1 12 M50278 Sleeve 1 13 M11084-26 Screw, #10-16 x 3/8" 13 14 ** Motor & pump assembly 1 15 099896-01 Power cord 1 16 M50295-02 Fuel line 1 17 M50050 Ignition boot 1 18 102482-04 Electronic Ignitor 1 19 108437-02 Lower shell model B350D/SB350D (Yellow) 1 108437-01 Lower shell model R350A (White) 1 20 M11271-8 Clip nut 16 21 M11084-3 Screw, #12-14 x 1/2" 14 22 M50104-02 Bushing 2 23 099509-01 Wire harness 1 24 M50115-01 Fuel line assembly 1 25 M50062-03 Front handle 1 26 097702-01 Fuel cap 1 27 HA2210 Filler neck screen 1 28 HC4-18C Screw, 1/4-20 x 2 29 M51043-01 Screw, 1/4-20 x 1 1/2" 2 30 M50062-04 Rear handle 1 31 098513-05 Fuel tank 1 32 M50063 Wheel support frame 1 33 M18774 Axle 1 34 NTC-4C Hex lock nut, 1/4-20 8 35 M50389 Wheel 2 36 C5-10C Cotter pin, 5/32 x 1 37 WP-10C Flatwasher, 5/8" 4 38 M50296 Wheel spacer 2 39 M27417 Drain plug 1 40 099895-01 Thermostat 1 41 M11084-29 Screw, #10-16 x 3/4" 2

/4" 6

/4" 2

** Not available as complete assembly. See pages 18 through 20.

110098-01F 15

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ILLUSTRATED PARTS BREAKDOWN

MODELS B600D, SB600D AND R600A

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This list contains replaceable parts used in your heater. When ordering parts, follow the instructions

PARTS LIST

listed under Repair Service on the back page of this manual.

MODELS B600D, SB600D AND R600A

KEY NO. PART NO. DESCRIPTION QTY.

1 108396-02 Upper shell model B600D/SB600D (Yellow) 1 108396-01 Upper shell model R600A (White) 1 2 M11084-27 Screw, #10-16 x 1/2" 28 3 M50543-01 Combustion chamber & shield 1 4 M30865-02 Bushing 5 5 M50157 Air deﬂector 5 6 ** Burner head assembly 1 7 104679-01 Photocell assembly 1 8 M50194 Fan 1 9 106004-01 Fan guard 1 10 M51336-02 Fan switch 1 11 M51160-01 Fan switch cover 1 12 M50278 Sleeve 1 13 M11084-26 Screw, #10-16 x 3/8" 15 14 ** Motor & pump assembly 1 15 NTC-4C Hex nut, 1/4-20 18 16 M11271-8 Clip nut 18 17 M11084-3 Screw, #12-14 x 1/2" 4 18 M50104-02 Bushing 2 19 108397-02 Lower shell model B600D/SB600D (Yellow) 1 108397-01 Lower shell model R600A (White) 1 20 M50295-03 Fuel line 1 21 099896-01 Power cord 1 22 M50388-02 Support bracket model 2 23 HC4-3C Screw, 1/4-20 x 3/8" 4 24 M50224 Front handle 1 25 M51043-01 Screw, 1/4-20 x 1 26 097702-01 Fuel cap 1 27 HA2210 Filler neck screen 1 28 099509-02 Wire harness 1 29 M28872-01 Rear handle 1 30 M50115-02 Fuel line assembly 1 31 M50050 Ignition boot 1 32 102482-04 Electronic Ignitor 1 33 098513-07 Fuel tank 1 34 HC4-22C Screw, 1/4-20 x 2 35 M28140-02 Wheel support frame 1 36 M18774 Axle 1 37 M27417 Drain plug 1 38 RC1-3C Screw, #6-32 x 3/8" 2 39 099895-01 Thermostat 1 40 M25121-02 Thermostat bracket 1 41 M50389 Wheel 2 42 C5-10C Cotter pin, 5/32 x 1 43 WP-10C Flatwasher, 5/8” 4 44 M50296 Wheel spacer 2 45 104413-01 Photocell Bracket 1 46 M10908-2 Screw, #6-32 x 3/8" 2 47 M11084-29 Screw, #10-16 x 3/4" 2 **** Internal lockwasher No. 6 2 NPC-1C*** Nut, 6-32 2

** Not available as complete assembly. See pages 18 through 20. *** Not shown **** Standard hardware item

/2" 6

/4" 8

/4" 2

110098-01F 17

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ILLUSTRATED PARTS BREAKDOWN AND PART LIST

BURNER HEAD ASSEMBLY 350,000 AND 600,000 BTU/HR

REF NO. PART NO. DESCRIPTION QTY.

1 M10908-2 Screw, #6-32 x 3/8" (350,000 Btu/Hr Only) 2 2 099229-01 Photocell Bracket (350,000 Btu/Hr Only) 1 3 HA3012 Spark Plug 1 4 M50112 Nozzle (350,000 Btu/Hr) 1 M30765 Nozzle (600,000 Btu/Hr) 1 5 M51170-01 Plug 1 6 M50924-02 Burner Head Body 1 7 69246 Straight Nipple 1 8 M50077 Solenoid Valve 1 9 M50297 Compression Elbow 1

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(10 inside)

17 (3)

22 (2)

ILLUSTRATED PARTS BREAKDOWN AND PART LIST

MOTOR AND PUMP ASSEMBLY 350,000 AND 600,000 BTU/HR HEATERS WITH FUEL FILTER INTERNAL TO PUMP

REF. NO. PART NO. DESCRIPTION QTY.

1 097492-03 Wiring cover 1 2 HF5-5C Screw, 5/16-24 x 5/16" 4 3 WLE-5 External lockwasher, 5/16" 4 4 M11084-26 Screw, #10-16 x 3/8" 3 5 099562-01 Motor (350,000 Btu/Hr) 1 099562-02 Motor (600,000 Btu/Hr) 1 6 M50116 Flange clamp (holds pump to motor) 1 7 099518-05 Motor support (350,000 Btu/Hr) 1 101552-01 Motor support (600,000 Btu/Hr) 1 8 M50297 Compression elbow 1 9 098560-02 Fuel pump 1 10 110381-01 Filter element and gasket (inside fuel pump) 1 11 M50113-02 Straight ﬁtting 2 12 M10908-14 Screw, #8-32 x 3/8" 1 13 101504-01 Strain relief bushing 1 14 ** Lockwasher, 5/16" 4 15 NPF-5C Hex nut, 5/16-24" 4 16 HA3003 Flame-out control 1 17 101547-01 Snap bushing 3 18 M10908-2 Screw, #6-32 x 3/8" 2 19 097491-01 Power relay 1 20 099125-04 Terminal board 1 21 099125-05 Terminal board 1 22 099157-01 Rivet 2

** Standard hardware item

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19 (3)

25 (2)

PART LIST

MOTOR AND PUMP ASSEMBLY 350,000 AND 600,000 BTU/HR

For Heaters With Fuel Filter/Canister External To Pump

REF. NO. PART NO. DESCRIPTION QTY.

1 097492-03 Wiring cover 1 2 HF5-5C Screw, 5/16-24 x 5/16” 4 3 WLE-5 External lockwasher, 5/16” 4 4 M11084-26 Screw, #10-16 x 3/8” 3 5 099562-01 Motor (350,000 Btu/Hr) 1 099562-02 Motor (600,000 Btu/Hr) 1 6 M50116 Flange clamp (holds pump to motor) 1 7 099518-05 Motor support (350,000 Btu/Hr) 1 101552-01 Motor support (600,000 Btu/Hr) 1 8 57413 Street elbow 2 9 M17499-2 Pipe nipple 1 10 098102-01 Fuel ﬁlter assembly 1 098103-01 Filter element (inside fuel ﬁlter assembly, includes rubber gaskets) 1 11 M50114-02 90˚ Male elbow 1 12 M50297 Compression elbow 1 13 M50113-02 Straight ﬁtting 1

15 ** Lockwasher, 5/16” 4 16 NPF-5C Hex nut, 5/16-24” 4 17 HA3003 Flame-out control 1 18 097491-01 Power relay 1 19 101547-01 Snap bushing 3 20 M10908-2 Screw, #6-32 x 3/8” 2 21 101504-01 Strain relief bushing 1 22 M10908-14 Screw, #8-32 x 3/8” 1

14 098560-02 Fuel pump 1

23 099125-05 Terminal board 1 24 099125-04 Terminal board 1 25 099157-01 Rivet 2

** Standard hardware item

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SPECIFICATIONS

132

FAN

SWITCH

7 5

B A

MOTOR

RELA

WHITE

RED ORANGE

ORANGE

RED

BLACK

WHITE

BLACK

WHITE

BLUE

WHITE

BLACK BLACK

THERMOSTAT

FLAME-OUT

CONTROL

RESET

BUTT

RED

YELLOW

RED

WHITE

SOLENOID

VALV

WHITE

TERMINAL

BOARD

TERMINAL

BOARD

ELECTRONIC

IGNITOR

WHITE

SPARK

PLUG

PHOTOCELL

BLACK

WHITE

GREEN

YELLOW

WHITE

PLUG

120V 60Hz

350,000 Btu/Hr 600,000 Btu/Hr

Output Rating (Btu/Hr) 350,000 600,000

Fuel Use only kerosene, #1#2 diesel/fuel oil, JET A or JP-8 fuels

Fuel Tank Capacity (U.S. Gallons) 30 36

Fuel Consumption (Gallons Per Hr) 2.5 4

Electric Requirements 120V/60 Hz 120V/60 Hz

Amperage (Normal Run) 7.1 11

Motor RPM 1725 1725

Fuel Pump Pressure (PSI) 100 110

Spark Plug Gap .075" .075"

Weight (approx. lbs.) Dry 180 285

With Full Fuel Tank 390 550

WIRING DIAGRAM

110098-01F 21

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MAINTENANCE KITS

Kit Part Number

Flame-Out Control HA3003 Spark Plug HA3012

TECHNICAL SERVICE

You may have further questions about installation, operation or troubleshooting. If so, contact DESA Heating Productsʼ Technical Service Department at 1-866-672-6040. When calling please have your model and serial numbers of your heater ready.

You can also visit DESA Heating Productsʼ Techni cal Services web site at www.desatech.com.

ACCESSORY

Purchase this heater accessory from your nearest dealer or service center. If they cannot supply this accessory, either contact your nearest Parts Central or DESA Heating Products at 1-866-672-6040 for information. Parts Centrals are listed in the Autho rized Service Center booklet supplied with heater.

FUEL PRESSURE GAUGE - 110380-01

Special tool to check fuel pump pressure.

REPLACEMENT PARTS

Note: Use only original replacement parts. This will protect your warranty coverage for parts replaced under warranty.

PARTS UNDER WARRANTY

Contact authorized dealers of this product. If they canʼt supply original replacement part(s), call DESA Heating Productsʼ Technical Service Dept. at 1-866-672-6040.

When calling DESA Heating Products, have ready:

• your name

• your 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

Contact authorized dealers of this product. If they canʼt supply original 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 supplied with heater.

When calling DESA Heating Products, have ready:

• model and serial numbers of your heater

• the replacement part number

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110098-01F

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NOTES

_____________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________

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WARRANTY AND REPAIR SERVICES

110098 01

LIMITED WARRANTY

DESA Heating Products warrants this product and any parts thereof, to be free from defects in materials and workmanship for one (1) year from the date of ﬁrst purchase when operated and maintained in accordance with in structions. This warranty is extended only to the original retail purchaser, when proof of purchase is provided.

This warranty covers only the cost of parts and labor required to restore the product to proper operating condition. Transportation and incidental costs associated with warranty repairs are not reimbursable under this warranty.

Warranty service is available only through authorized dealers and service centers.

This warranty does not cover defects resulting from misuse, abuse, negligence, accidents, lack of proper main tenance, normal wear, alteration, modiﬁcation, tampering, contaminated fuels, repair using improper parts or repair by anyone other than an authorized dealer or service center. Routine maintenance is the responsibility of the owner.

THIS EXPRESS WARRANTY IS GIVEN IN LIEU OF ANY OTHER WARRANTY EITHER EXPRESSED OR IMPLIED, INCLUDING WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICU LAR PURPOSE.

DESA Heating Products assumes no responsibility for indirect, incidental or consequential damages. Some states do not allow the exclusion or limitation of incidental or consequential damages or limitations or exclu sions may not apply to you. This Limited Warranty gives you speciﬁc legal rights and you may also have other rights which vary from state to state.

WARRANTY SERVICE

Should your heater require service, return it to your nearest authorized service center. Proof of purchase must be presented with the heater. The heater will be inspected. A defect may be caused by faulty materials or workmanship. If so, DESA Heating Products will repair or replace the heater without charge.

REPAIR SERVICE

Return the heater to your nearest authorized service center. Each Service Center is independently owned and operated. Repairs not covered by the warranty will be billed at standard prices. We reserve the right to amend these speciﬁca tions at any time without notice.

Illustrated parts lists can be obtained 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 may 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 number as shown on the model plate.

For more information about this warranty, write:

2701 Industrial Drive P.O. Box 90004 Bowling Green, KY 42102-9004 www.desatech.com

NOT A UPC

110098-01 Rev. F 11/04

Desa Tech B350D, B600D, R350A, R600A, SB350D Owner's Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

SAFETY INFORMATION

UNPACKING

OPERATION

FUELS

VENTILATION

OPERATION

PREVENTATIVE MAINTENANCE SCHEDULE

TROUBLESHOOTING

SERVICE PROCEDURES

ILLUSTRATED PARTS BREAKDOWN

SPECIFICATIONS

WIRING DIAGRAM

MAINTENANCE KITS

TECHNICAL SERVICE

ACCESSORY

REPLACEMENT PARTS

WARRANTY AND REPAIR SERVICES