Desa 40.000, Btu/Hr 55.000, Btu/Hr 60.000, Btu/Hr 70.000, Btu/Hr 110.000 user manual

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PORTABLE FORCED

TM AIR HEATERS

OWNER’S MANUAL

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Heater Sizes: 40,000 55,000 60,000 70,000 110,000 115,000 150,000 155,000 165,000 and 200,000 Btu/Hr Models

H.S.I. Series

IMPORTANT: Read and understand this manual before assembling, starting or servicing heater. Improper use of heater can cause serious injury. Keep this manual for future reference.

TABLE OF CONTENTS
SAFETY INFORMATION ............................................................	2
PRODUCT IDENTIFICATION .....................................................	3
UNPACKING ...............................................................................	3
THEORY OF OPERATION .........................................................	4
FUELS .........................................................................................	4
VENTILATION .............................................................................	4
ASSEMBLY .................................................................................	5
OPERATION ...............................................................................	5
OPERATION WITH PORTABLE GENERATOR ..........................	6
PREVENTATIVE MAINTENANCE SCHEDULE .........................	6
STORING, TRANSPORTING, OR SHIPPING ............................	6

TROUBLESHOOTING ................................................................	7
SERVICE PROCEDURES ..........................................................	8
TECHNICAL SERVICE .............................................................	15
REPLACEMENT PARTS ..........................................................	15
SPECIFICATIONS ....................................................................	16
WIRING DIAGRAMS.................................................................	16
ILLUSTRATED PARTS BREAKDOWN AND PARTS LIST .......	18
WHEELS AND HANDLES ........................................................	24
ACCESSORIES ........................................................................	25
WARRANTY AND REPAIR SERVICE ......................................	26

Fill In For Your Records

Model No. ___________________

(Located on side panel)

Serial No. ___________________
(Located on fuel tank)	®
Date of Purchase: ______________

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SAFETY INFORMATION

WARNINGS

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 serious injury or death from burns, ﬁre, explosion, electrical shock, and carbon monoxide poisoning.

•Heater must be grounded. Use only a properly grounded threewire 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 2 feet (61 cm) from sides and inlet.

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 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 thoroughly 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 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 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 762cm (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 authority having jurisdiction.

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

•Locate heater on a stable and level surface while hot or operating or a ﬁre may occur.

•Use only in well-vented areas. Before using heater, provide at least a 2800 square cm (three-square-foot) opening of fresh, outside air for each 30 kw (100,000 Btu/Hr) of rating. This heater produces carbon monoxide, which is listed by the State of California as a reproductive toxin under Proposition 65.

•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 304.8cm (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.

•Unplug heater when not in use.

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

•Warning to New York City Residents

For Use Only At Construction Sites in accordance with applicable NYC codes under NYCFD certificate of approval #4803, #4899, #4908, #4909, or #4934.

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Desa 40.000, Btu/Hr 55.000, Btu/Hr 60.000, Btu/Hr 70.000, Btu/Hr 110.000 user manual

PRODUCT IDENTIFICATION UNPACKING 3

PRODUCT IDENTIFICATION

Hot Air	Handle
Outlet	Thermostat Knob
Upper	(Thermostat Models Only)
Upper
Shell	Fan Guard
	Fan Guard

Lower

Shell

	Fuel	Air Filter
		End
	Tank
		Cover
	Side Cover

Ignition Control

Assembly (On Inside

of Side Cover)

Power

Cord

Fuel Cap

Figure 1 - 40/55/60/70 Models

	Hot Air Outlet	Fan
	Hot Air Outlet	Guard
	Upper Shell	Guard

Lower

Shell

Fuel

Cap

Side Cover		Thermostat
Ignition Control		Knob
Ignition Control		(Thermostat
Assembly (On Inside		(Thermostat
Assembly (On Inside	Power Cord	Models Only)
of Side Cover)		Models Only)
of Side Cover)		Fuel Tank

		Thermostat Knob
Hot Air	Upper Shell	(Thermostat Models Only)
	Upper Shell
		Fan Guard
Outlet		Fan Guard
Lower
Shell

Fuel Cap		Fuel Tank
Fuel Cap
Side Cover	Ignition Control
Side Cover	Assembly (On Inside	Power Cord
	of Side Cover)

Figure 3 - 200 Model

UNPACKING

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

2.Remove all items from carton.

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

Figure 2 - 110/115/150/155/165 Models

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THEORY OF OPERATION 4 FUELS

VENTILATION

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 and around the combustion chamber. This air is heated and provides a stream of clean, hot air.

Combustion Chamber	Motor
	Ignitor
	Fan
Clean
Heated
Air Out

The Ignition System: The ignition control assembly provides power to the ignitor. This ignites the fuel/air mixture in the combustion chamber.

The Flame-Out Control System: This system causes the heater to shut down if the ﬂame goes out.

Air Pump

Air Intake

Filter

Cool

Air

Output

Filter

Fuel Nozzle	Fuel	Air Line	Ignition Control
Tank	Filter	To Burner	Assembly
Air For Fuel System		Air For Combustion	Fuel
Air For Fuel System		And Heating	Fuel
		And Heating
Figure 4 - Cross Section Operational View
FUELS			VENTILATION

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, oil drained from crankcases, naphtha, paint thinners, alcohol or other highly ﬂammable fuels.

Use only kerosene, #1/#2 diesel/fuel oil, JET A or JP-8 fuels. Heavier fuels such as No. 2 fuel oil or No. 2 diesel fuel may also be used but will result in:

•noticeable odor

•additional fuel ﬁlter maintenance

•the need for nontoxic, anti-icer additives in very cold weather

Do not use fuels heavier than No. 2 grade or heavy oils such as oil drained from crankcases. These heavy oils will not ignite properly and will contaminate the heater.

IMPORTANT:Use a KEROSENE ONLY (blue) or DIESEL ONLY (yellow) storage container. Be sure storage container is clean. Foreign matter such as rust, dirt, or water will cause the ignition control assembly to shut down heater. Foreign matter may also require heater's fuel system to be frequently cleaned.

WARNING: Provide a fresh air opening of at least three square feet (2,800 square cm) for each 100,000 BTU/HR rating. Provide extra fresh air if more heaters are being used. The minimum ventilation requirements must be followed to avoid risks associated with carbon monoxide poisoning. Make certain these requirements are met prior to operating heater.

Example: A 58.6kw (200,000 Btu/Hr) heater requires one of the following:

•a two-car garage door [4.88 meter (16 feet) opening] raised

12.7cm (5 inches)

•a single-car garage door [2.74 meter (9 feet) opening] raised

20.3cm (8 inches)

•two, 76.2 cm (30 inch) windows raised 38.1 cm (15 inches)

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ASSEMBLY OPERATION 5

ASSEMBLY

(FOR 110/115/150/155/165/200 MODELS ONLY)

These models are furnished with wheels and a rear handle. Some models are furnished with a front handle also. Wheels, handle(s), and the mounting hardware are found in the shipping carton.

Tools Needed

•Medium Phillips Screwdriver

•3/8" Open or Adjustable Wrench

•Hammer

1.Slide axle through wheel support frame. Install wheels on axle.

IMPORTANT: When installing wheels, point extended hub of wheels toward wheel support frame (see Figure 5).

2.Place cap nuts on axle ends. Gently tap with hammer to secure.

3.Place heater on wheel support frame. Make sure hot air outlet end (front) of heater is over wheels. Line up holes on fuel tank ﬂange with holes on wheel support frame.

4.Place rear handle (and front handle if provided) on top of fuel tank ﬂange. Insert screws through handle(s), fuel tank ﬂange, and wheel support frame. Attach nut ﬁnger tight after each screw is inserted.

5.After all screws are inserted, tighten nuts ﬁrmly.

Front Handle
(If Provided)	Handle
	Handle
	Screw

Hot Air
Outlet
Fuel Tank	Air
Fuel Tank	Inlet
Flange

Wheel

Support

Frame

Wheel

Cap Nut

Nut

Extended

Hub

Axle

Figure 5 - Wheel and Handle Assembly, 110/115/150/155/165/ 200 Models Only

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.

TO START HEATER

1.Follow all ventilation and safety information.

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

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

4.Attach fuel cap.

5.For thermostat models, turn thermostat knob clockwise to the high position.

6.Plug heater’s power cord into approved, grounded, three-wire extension cord. Extension cord must be at least six feet (1.8 meters) long.

Extension Cord Size Requirement

6 to 10 feet (1.8 to 3 meters) long, use 18 AWG (0.75 mm2) rated cord

11 to 100 feet (3.3 to 30.5 meters) long, use 16 AWG (1.0 mm2) rated cord

101 to 200 feet (30.8 to 61 meters) long, use 14 AWG (1.5 mm2) rated cord

7.Plug extension cord into standard 120 volt/60 hertz, 3-prong grounded outlet. Note: Ignitor will preheat for five seconds, then heater will start.

8.For thermostat models, adjust thermostat knob to the desired setting. 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 thermostat until heater cycles at the desired setting.

TO STOP HEATER

Unplug extension cord from outlet.

TO RESTART HEATER

1.Unplug extension cord from outlet and wait 10 seconds. (Wait two minutes if heater has been running.)

2.Repeat steps under To Start Heater.

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OPERATION WITH PORTABLE GENERATOR 6 STORING, TRANSPORTING, OR SHIPPING

PREVENTATIVE MAINTENANCE SCHEDULE

OPERATION WITH PORTABLE GENERATOR

WARNING: Before operating heater or any appliance from a portable generator, verify that generator has been properly connected to earth ground. Improper grounding or failure to ground generator can result in electrocution 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 automatic idle feature, the output voltage should be measured with the generator running at full speed). If the voltage does not measure in this range the heater should not be plugged into the generator.

Refer to Operation, page 5, for starting, stopping, and resetting heater procedures.

Ground Lug

Alternator

Copper or Brass

Grounding Point

Ground Wire (#10 AWG -

Stranded-Copper)

STORING, TRANSPORTING, OR SHIPPING

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

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 provided.

3.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.

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

5.If storing, store heater in dry place. 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.

Figure 6 - Typical Generator Grounding Method (Generator construction may vary from that shown)

PREVENTATIVE MAINTENANCE SCHEDULE

WARNING: Never service heater while it is plugged in, operating, or hot. Severe burns and electrical shock can occur.

Item

How Often

How To

Fuel tank	Flush every 150-200 hours of operation or as needed
Air output and lint ﬁlters	Replace every 500 hours of operation or once a year
Air intake ﬁlter	Wash and dry with soap and water every 500 hours
	of operation or as needed
Fuel ﬁlter	Clean twice a heating season or as needed
Ignitor	No maintenance required
Fan blades	Clean every season or as needed
Motor	Not required/permanently lubricated

See Storing, Transporting, or Shipping, above See Air Output, Air Intake, and Lint Filters, page 8 See Air Output, Air Intake, and Lint Filters, page 8

See Fuel Filter, pages 9 and 10

See Fan, page 8

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TROUBLESHOOTING

WARNING: Never service heater while it is plugged in, operating, or hot. Severe burns and electrical shock can occur.

FAULT CONDITION	POSSIBLE CAUSE		REMEDY
Motor does not start five seconds after	1.	No power to heater	1.	Check circuit breaker in electrical panel
heater is plugged in	2.	If equipped, thermostat setting is too low	2.	Turn thermostat knob to a higher setting

WARNING: High voltage!

3.Bad electrical connection between motor and ignition control assembly or ignition control assembly and power cord

4.Binding pump rotor

5.Defective ignition control assembly

6.Defective motor

7.Blown fuse or ignitor control assembly

3.Check all electrical connections. See

Wiring Diagrams, page 17

4.If fan does not turn freely, see Pump Rotor, page 14

5.Replace ignition control assembly

6.Replace motor

7.See Ignition Control Assembly, page 15

Motor starts and runs but heater does not	1.	No fuel in tank	1.	Fill tank with kerosene
ignite	2.	Pump pressure incorrect	2.	See Pump Pressure Adjustment, page 9
	3.	Dirty fuel ﬁlter	3.	See Fuel Filter, pages 9 and 10
	4.	Obstruction in nozzle	4.	See Nozzle Assembly, pages 12 and 13
	5.	Water in fuel tank	5.	Drain and ﬂush fuel tank with clean
				kerosene. See Storing, Transporting, or
				Shipping, page 6

WARNING: High voltage!

6.Bad electrical connection between ignitor and ignition control assembly

7.Defective ignitor

8.Defective ignition control assembly

9.200 Model Only: Defective fuel valve (Models equipped with fuel valve only)

6.Check electrical connections. See Wiring Diagrams, page 17

7.Replace ignitor, see page 11

8.Replace ignition control assembly

9.See Fuel Valve, page 10

Heater ignites but ignition control as-	1.	Pump pressure incorrect	1.	See Pump Pressure Adjustment, page 9
sembly shuts heater off after a short	2.	Dirty air intake, air output, and/or lint	2.	See Air Output, Air Intake, and Lint Fil-
period of time		filter		ters, page 8
	3.	Dirty fuel ﬁlter	3.	See Fuel Filter, pages 9 and 10
	4.	Obstruction in nozzle	4.	See Nozzle Assembly, pages 12 and 13
	5.	Photocell assembly not properly in-	5.	Make sure photocell boot is properly
		stalled (not seeing the flame)		seated in bracket
	6.	Dirty photocell lens	6.	Clean photocell lens

WARNING: High voltage!

7.Bad electrical connection between photocell and ignition control assembly

8.Defective photocell

9.Defective ignition control assembly

7.Check electrical connections. See Wiring Diagrams, page 17

8.Replace photocell

9.Replace ignition control assembly

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SERVICE PROCEDURES

WARNING: To avoid risk of burn and electrical shock, never attempt to service heater while it is plugged in, operating, or hot.

UPPER SHELL REMOVAL

1.Remove screws along each side of heater using 5/16" nut-driver. These screws attach upper and lower shells together. See Figure 7 or 8.

2.Lift upper shell off.

3.Remove fan guard.

Screw	Screw
Screw
Upper Shell	Upper Shell
Upper Shell
Fan
Guard
	Fan
	Guard
Figure 7 - Upper Shell	Figure 8 - Upper Shell
Removal, 40/50/60/70	Removal, 110/115/150/155/
Models Only	165/200 Models Only

FAN

IMPORTANT: Remove fan from motor shaft before removing motor from heater. The weight of the motor resting on the fan could damage the fan pitch (see Figure 9).

1.Remove upper shell (see Figure 7 or 8).

2.Use 1/8" allen wrench to loosen setscrew which holds fan to motor 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 10).

7.Place setscrew on flat of shaft. Tighten setscrew firmly (40-50 inch-pounds/4.5-5.6 n-m).

8.Replace fan guard and upper shell.