100,000 Btu/Hr

PROPANE CONSTRUCTION HEATER

SERVICE

PROCEDURES

Continued

SPARK TRANSFORMER

1.Remove base tray.

2.Locate and disconnect white, black, and orange wires from spark transformer.

3.Remove two screws holding spark transformer to base. Remove sheet metal nuts on transformer and install on new transformer. Discard spark transformer.

4.Install new spark transformer. Position new spark transformer in same manner as old transformer.

5.Connect white, black, and orange wires to new spark transformer. Connect wires to correct terminals as noted in step 2.

6.Replace base tray.

Ignitor

Wire

Bushing

Figure 10 - Removing Ignitor Wire from Spark Transformer

IGNITOR

1.Remove motor, motor mount, and fan guard (see Motor, page 7, steps 1 through 6) .

2.Remove orange ignitor wire from ignitor.

3.Remove ignitor mounting screw from rear head using nut-driver or standard screwdriver (see Figure 11).

4.Remove ignitor from rear head.

5.Install new ignitor. Attach ignitor to rear head with ignitor mounting screw.

6.Attach ignitor wire.

7.Check gap between ignitor electrode and nozzle to .13"/.15" (see Figure 12).

8.Test for spark.

WARNING: Make sure heater is disconnected from propane supply. Heater could ignite caus- ing severe burns.

Plug into extension cord and watch for spark between ignitor electrode and nozzle.

9.Place motor, motor mount, and fan guard into rear of heater shell (see Motor, page 7, steps 14 through 18).

Ignitor

Mounting

Screw

Ignitor

Rear Head

Figure 11 - Removing Ignitor Mounting Screw and Ignitor

Burner

Nozzle

Ignitor

Electrode

Gap

Area

Figure 12 - Clearance between Ignitor Electrode and Target Plate

ACCESSORIES

Purchase accessories and parts from your nearest dealer or service center. If your dealer or service center can not supply an accessory or part, either contact your near- est Parts Central (listed in the separate Au- thorized Service Center booklet) or call DESA International’s Parts Department at 1-800-972-7879 for referral information. You can also write to the address listed on the back page of this manual.

Hose: LPA1000 - For 100,000 Btu/Hr Model

A 10 foot hose for locating heater further away from propane tank(s).

Regulator: LPA2150 - For 100,000 Btu/Hr Model

Hose and Regulator Assembly:

LPA3100 - For 100,000 Btu/Hr

Model

Fuel Gas Connector: LPA4020 - For All Models

A POL adapter with excess-flow

TECHNICAL

SERVICE

You may have further questions about this heater. If so, contact DESA International’s Technical Service Department at 1-800- 323-5190.

You can also visit DESA International’s Technical Service web site at www.desatech.com.

8

102370-01H

Page 8
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Desa PROPANE CONSTRUCTION HEATERS owner manual Accessories, Technical Service, Spark Transformer, Ignitor

PROPANE CONSTRUCTION HEATERS specifications

Desa propane construction heaters are an essential tool for contractors and builders, especially during cold weather conditions, providing a reliable and efficient heating solution on job sites. Known for their robust construction and advanced features, these heaters ensure that projects remain on schedule without the distractions of cold weather.

One of the standout features of Desa propane heaters is their portable design, making them easy to transport and position wherever heat is needed. This mobility is crucial on construction sites where workspaces are often changing and vary in size. Desa offers a range of models with varying heat outputs, allowing users to select the right heater based on the specific requirements of the job site.

These heaters utilize propane gas as their primary fuel source, allowing them to deliver immediate heat without the need for cords or electrical connections. This characteristic makes them particularly valuable in outdoor settings or in areas where electricity access is limited. Furthermore, propane is generally more cost-effective than electricity for heating large areas, thus providing significant savings over time.

Desa construction heaters also feature advanced safety mechanisms. Many models are equipped with built-in safety shut-off systems that activate in the event of low oxygen levels or overheating, ensuring a safe working environment. Additionally, the heaters often come with adjustable heat settings, allowing users to tailor the output to their specific needs, whether they require a gentle warmth or a robust heating solution.

The construction of Desa propane heaters is designed for durability. Made from high-quality materials, these heaters can withstand the rigors of outdoor use and resist corrosion and impacts. The stainless steel burners are designed for longevity and optimal performance, providing consistent heat generation over extended periods.

In terms of technology, most Desa propane heaters include features such as a thermostat for temperature regulation and a fan-forced design that distributes heat evenly across larger areas. This ensures that workers are kept comfortable, which can boost productivity and morale on the job site.

By choosing Desa propane construction heaters, contractors invest in a versatile and efficient heating solution that meets the demanding needs of construction projects. With their combination of portability, safety features, and durable design, Desa heaters stand out as a reliable choice for anyone looking to maintain a productive work environment in challenging weather conditions.