Desa Tech 4E236C Owner's Manual

Operating Instructions & Parts Manual

Please read and save these instructions. Read carefully before attempting to assemble, install, operate or maintain the product described. Protect yourself and others by observing all safety information. Failure to comply with instructions could result in personal injury and/or property damage! Retain instructions for future reference.

4E236C

Dayton Propane Construction Heater

Description

Dayton propane construction heater is variable 223,000 to 375,000 BTU/Hr with a built-in thermostat. This heater uses propane gas for combustion and electricity to run the motor. It is primarily intended for temporary heating of buildings under construction, alteration, or repair. This heater should only be used indoors but never in occupied dwellings. Products of combustion are vented into

the area being heated.

Unpacking

1. Remove all packing items applied to heater for shipment. Keep plastic cover caps (attached to inlet connector and hose/regulator assembly) for storage.

2. Remove all items from carton.

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

GENERAL HAZARD WARNING

Failure to comply with the precautions and instructions provided with this heater can result in death, serious bodily injury, and property loss or damage from hazards of fire, explosion, burn, asphyxiation, carbon monoxide poisoning, and/or electrical shock.

Only persons who can understand and follow instructions should use or service this heater.

If you need assistance or

Figure 1 – Model 4E236C

heater information such as an instructions manual, labels, etc. contact the manufacturer.

Form 5S3163

Printed in U.S.A. 03430 0502/080/VCPVP

Fire, burn,

inhalation, and explosion hazard. Keep solid combustibles such as building materials, paper or cardboard, a safe distance away from the heater as recommended by the instructions. Never use the heater in spaces which do or may contain volatile or airborne combustibles, or products such as gasoline, solvents, paint thinner, dust particles, or unknown chemicals.

Not for home or

recreational vehicle use.

Heater is designed and approved for use as a construction heater under ANSI Z83.7•CGA 2.14. The primary purpose of construction heaters is to provide temporary heating of buildings under construction, alteration or repair, and to provide temporary emergency heat. Properly used, the heater provides safe economical heating. Products of combustion are vented into the area being heated.

We cannot foresee every use which may be made of our heaters. Check with your local fire safety authority if you have questions about heater use.

Other standards govern the use of fuel gases and heat producing products for specific uses. Local authorities can advise you about these.

104799-01 Rev. D 05/02

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Dayton Operating Instructions and Parts Manual

Dayton Propane Construction Heater

4E236C

Specifications

ELECTRICAL SPECIFICATIONS

Electrical Input ............................................... 120V/60Hz

Amperage........................................................ 4.2

Motor ............................................................... 1/5 HP @ 1725 RPM

GENERAL SPECIFICATIONS

Output Rating BTU/Hr ..................................... 225,000 to 375,000

Fuel .................................................................. Propane Vapor Only

Minimum Fuel Consumption......................... 2.5 Gal/Hr 10.4 Lbs/Hr

Maximum Fuel Consumption ........................ 4.0 Gal/Hr 7.4 Lbs/Hr

Ignition ............................................................ Direct Spark

Regulator Outlet Pressure ............................. 7-20 psiG

Hot Air Output Approx. (CFM) ...................... 1500

Minimum Supply Pressure to Regulator...... 25 psiG (for purposes of input adjustment)

Maximum Supply Pressure to Regulator ..... Tank Pressure

Size L x W x H (Inches) ................................... 34" x 13" x 19.5"

Weight (pounds) ............................................. 42 (Heater) 49 (Shipping)

Temperature Control ...................................... Built-in Thermostat

Product Identification

Hot Air Outlet (Front)

Outer Shell

Handle

Fan Guard

General Safety Information

IMPORTANT: Make certain you read

and understand all warnings. Keep these instructions for reference. They are your guide to safe and proper operation of this heater.

Safety information appears throughout these instructions. Pay close attention to them. Below are definitions for the safety information listed throughout this manual.

Under this heading,

installation, operating and maintenance procedures or practices will be found that, if not carefully followed, WILL result in IMMEDIATE serious personal injury or death.

Under this head-

ing, installation, operating, and maintenance procedures or practices will be found that, if not carefully followed, COULD result in severe personal injury or death.

Under this heading,

installation, operating, and maintenance procedures or practices will be found that, if not carefully followed, MAY result in minor personal injury, product, or property damage.

On/Off Switch

Inlet Connector

Figure 2 – Product Identification

Hose/Regulator Assembly

Power Cord

REAR VIEW

Thermostat Knob

IMPORTANT: Not every possible circum-

stance that might involve a hazard can be anticipated. The warnings in this manual and on tags or decals affixed to the unit are therefore not all-inclusive. If a procedure, work method, or operating technique not specifically recommended by Dayton is used, you must make sure it is safe for you and others. You should also ensure that equipment will not be damaged or made unsafe by the operating or maintenance method you choose.

Dayton Operating Instructions and Parts Manual

Model 4E236C

General Safety Information

(Continued)

Carbon monoxide

poisoning: Some people are more affected by carbon monoxide than others. 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 operating properly. Get fresh air at once! Have heater serviced.

Propane Gas: Propane gas is odorless. An odor-making agent is added to propane gas. The odor helps you detect a propane gas leak. However, the odor added to propane gas can fade. Propane gas may be present even though no odor exists.

• For indoor use only. Provide

adequate ventilation.

• 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. This heater produces carbon monoxide, which is listed by the State of California as a reproductive toxin under Proposition 65.

• Do not use heater outdoors or in

occupied dwellings.

• Do not use heater in living or

sleeping quarters.

• Keep appliance area clear and free

from combustible materials, gasoline, paint thinner, and other flammable vapors and liquids. Do not use heater in areas with high dust content.

• Keep heater away from strong

drafts, water spray, rain, or dripping water.

• Install and use heater with care. Follow all local ordinances and codes. In the absence of local ordinances and codes, refer to ANSI/NFPA 58. This instructs on the safe storage and handling of propane gases.

• This heater is equipped with a thermostat. Heater may start at anytime.

• Check heater for damage before each use. Do not use a damaged heater.

• Use only propane gas set up for vapor withdrawal.

• The electrical connections and grounding of the heater shall follow the National Electric Code, ANSI/NFPA70.

• Keep propane tank(s) below 100° F.

• Do not use heater below ground level. Propane gas is heavier than air. If a leak occurs, propane gas will sink to the lowest possible level.

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

• Electrical grounding instructions — This appliance is equipped with a three-prong (grounding) plug for your protection against shock hazard and should be plugged directly into a properly grounded three-prong receptacle.

• Use only a three-prong, grounded extension cord.

• Use only the hose and factory regulator provided with the heater.

• Inspect hose before each use of heater. If highly worn or cut, replace before using heater. Use the replacement hose assembly specified in this manual.

• Keep heater at least six feet from propane tank(s). Do not point heater at propane tank(s) within 20 feet.

• Minimum heater clearances from combustibles:

Outlet: 8 Ft. Sides: 2 Ft. Top: 6 Ft. Rear: 2 Ft.

• Locate heater on stable and level surface if heater is hot or running.

• Keep children and animals away from heater.

• Turn off propane supply and unplug heater when not in use.

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

• Never move, handle, or service a hot, operating, or plugged-in heater. Severe burns may result. You must wait 20 minutes after turning heater off.

• Do not alter heater. Keep heater in its original state.

• Do not use heater if altered.

• Never attach duct work to front or rear of heater.

• Use only original replacement parts. This heater must use design-specific parts. Do not substitute or use generic parts. Improper replacement parts could cause serious or fatal injuries.

• Do not adjust regulator below 7 psiG or above 20 psiG.

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Dayton Operating Instructions and Parts Manual

Dayton Propane Construction Heater

4E236C

Theory of Operation

THE FUEL SYSTEM

The hose/regulator assembly attaches to the propane gas supply. The propane gas moves through the solenoid valve and out the nozzle.

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

Clean Heated Air Out (Front)

DSI

Nozzle

Figure 3 - Cross Section Operational View

THE IGNITION SYSTEM

The direct spark ignitor (DSI) sends voltage to the ignitor, which ignites the fuel and air mixture.

THE SAFETY CONTROL SYSTEM

This system causes the heater to shut down if the flame goes out. The motor will continue to run, but no heat is produced.

TEMPERATURE CONTROL SYSTEM

Built-in thermostat allows heater to cycle on and off to maintain consistent area temperature.

Power Cord

Fan

Motor

Hose/Regulator Assembly

Ignitor

Solenoid Valve

Cool Air In (Back)

Propane Supply

Propane gas and propane tank(s) are to be furnished by the user.

Use this heater only with a propane vapor withdrawal supply system. See Chapter 5 of the Standard for Storage

and Handling of Liquefied Petroleum Gas, ANSI/NFPA 58. Your local library or

fire department will have this booklet. The amount of propane gas ready for

use from propane tanks varies. Two factors determine this amount:

1. The amount of propane gas in tank(s)

2. The temperature of tank(s) The chart below shows the number of

100-pound tanks needed to run this heater. Do not operate this product with any tank smaller than 100 pounds.

Average Temperature Number of (ºF) at Tank Location 100 lb. Tanks

40° 3 32° Use larger tank 20° Use larger tank 10° Use larger tank

0° Use larger tank

-10° Use larger tank

-20° Use larger tank

Less gas is vaporized as the temperature goes down. A larger tank may be needed in colder weather. Your local propane gas dealer will help you select the proper supply system. The minimum surrounding air temperature rating for each heater is -20°F (-29°C).

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