INSPECTING HEATER

Check pilot flame pattern and burner flame pattern often.

PILOT FLAME PATTERN

Figure 27 shows a correct pilot flame pattern. Figure 28 shows an incorrect pilot flame pattern. The incorrect pilot flame is not touching the thermocouple. This will cause the thermocouple to cool. When the thermocouple cools, the heater will shut down.

If pilot flame pattern is incorrect, as shown in Figure 28

•turn heater off (see To Turn Off Gas to Appliance, page 14 or 16, depending on your model)

•see Troubleshooting, pages 19 through 21

Note: The pilot flame on natural gas units will have a slight curve, but flame should be blue and have no yellow or orange color.

Blue

Yellow Flame

Thermocouple

Thermocouple Flame Pilot

Pilot

Burner

Burner

 

Figure 27 - Correct Pilot Flame

Figure 28 - Incorrect Pilot Flame

Pattern

Pattern

BURNER FLAME PATTERN

Figure 29 shows a correct burner flame pattern. Figure 30 shows an incorrect burner flame pattern.

If burner flame pattern is incorrect, as shown in Figure 30

•turn heater off (see To Turn Off Gas to Appliance, page 14 or 16, depending on your model)

•see Troubleshooting, pages 19 through 21

 

Bad Burner Pattern-Plaque GRH/OV 019

Figure 29 - Correct Burner

Figure 30 - Incorrect Burner

Flame Pattern

Flame Pattern

CLEANING AND MAINTENANCE

WARNING: Turn off heater and let cool before cleaning.

INSPECTING HEATER

17

Pilot Flame Pattern

Burner Flame Pattern

 

CLEANING AND MAINTENANCE

 

ODS/Pilot and Burner

 

Cleaning Burner Pilot Air Inlet

 

Cabinet

 

 

CAUTION: You must keep control areas, burner, and circulating air passageways of heater clean. In- spect these areas of heater before each use. Have heater inspected yearly by a qualified service person. Heater may need more frequent cleaning due to exces- sive lint from carpeting, bedding material, pet hair, etc.

ODS/PILOT AND BURNER

•Use a vacuum cleaner, pressurized air, or small, soft bristled brush to clean.

CLEANING BURNER PILOT AIR INLET

The primary air inlet holes allow the proper amount of air to mix with the gas. This provides a clean burning flame. Keep these holes clear of dust, dirt, and lint. Clean these air inlet holes prior to each heating season. Blocked air holes will create soot. We recommend that you clean the unit every three months during operation and have heater inspected yearly by a qualified service person.

We also recommend that you keep the burner tube and pilot assembly clean and free of dust and dirt. To clean these parts we recommend using compressed air no greater than 30 PSI. Your local computer store, hardware store, or home center may carry compressed air in a can. You can use a vacuum cleaner in the blow position. If using compressed air in a can, please follow the directions on the can. If you don't follow directions on the can, you could damage the pilot assembly.

1.Shut off the unit, including the pilot. Allow the unit to cool for at least thirty minutes.

2.Inspect burner, pilot for dust and dirt.

3.Blow air through the ports/slots and holes in the burner.

4.Never insert objects into the pilot tube.

Clean the pilot assembly also. A yellow tip on the pilot flame indicates dust and dirt in the pilot assembly. There is a small pilot air inlet about two inches from where the pilot flame comes out of the pilot assembly (see Figure 31). With the unit off, lightly blow air through the air inlet. You may blow through a drinking straw if compressed air is not available.

Pilot Assembly

Pilot Air Inlet

Figure 31 - Pilot Inlet Air

CABINET

Air Passageways

•Use a vacuum cleaner or pressurized air to clean.

Exterior

•Use a soft cloth dampened with a mild soap and water mixture. Wipe the cabinet to remove dust.

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Desa VP16IT, VN30T, VP22IT, VP16T, VN25IT, VP26T, VN18T, VN18IT Inspecting Heater, Cleaning and Maintenance
Page 16 Page 18

VN18, VP16, VN18T, VN25IT, VP22IT specifications

Desa VN18, VN30T, VP16, VP26T, and VP16T are a series of innovative devices tailored to meet diverse needs in various applications, ranging from industrial to consumer markets. Each model embodies distinct features, technologies, and characteristics that enhance performance and usability.

The Desa VN18 is renowned for its compact structure and lightweight design, making it ideal for small-scale applications. It integrates a sophisticated energy-efficient system that minimizes power consumption while maximizing output. This model supports various connectivity options, ensuring seamless integration with existing systems. Additionally, the VN18 is equipped with an intuitive user interface that simplifies operation, making it accessible even for those with limited technical experience.

In contrast, the VN30T offers enhanced capabilities suitable for medium to large-scale operations. This model boasts an impressive processing power, enabling it to handle more complex tasks with ease. The VN30T features advanced cooling technologies that keep the unit operating optimally, even under heavy workloads. Furthermore, its durable construction ensures longevity and reliability, making it a preferred choice for industrial environments.

The VP16, designed with versatility in mind, excels in adaptability across multiple applications. It offers interchangeable components, allowing users to customize setup based on specific needs. The technology embedded within the VP16 includes smart sensors that provide real-time feedback, helping users to monitor performance and adjust settings accordingly. This level of adaptability makes the VP16 an invaluable asset in dynamic working conditions.

Next in the lineup is the VP26T, which stands out for its robust performance under demanding conditions. With a focus on safety features, this model includes multiple fail-safes and redundancy systems that ensure consistent operation, even in emergencies. The VP26T is designed for heavy-duty applications, featuring enhanced materials that resist wear and tear, thereby prolonging its lifespan.

Finally, the VP16T combines the best aspects of its predecessors while introducing new technological advancements. It utilizes cutting-edge automation technologies that enable remote control and monitoring, enhancing user convenience. The VP16T's power management system optimizes energy use based on operational demands, contributing to both cost savings and sustainability.

Overall, Desa VN18, VN30T, VP16, VP26T, and VP16T represent a forward-thinking approach to design and functionality, addressing the evolving needs of users across various sectors. With their unique features and robust technologies, these models are set to redefine standards in their respective categories.
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