Desa DNV40PB, DNV25PB installation manual Observed Problem Possible Cause

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OWNER’S MANUAL

TROUBLESHOOTING

Continued

OBSERVED PROBLEM

POSSIBLE CAUSE

REMEDY

Ignition failures

1. Glo bar will not glow - with blower run-

 

ning and microswitch engaged

2. Glo bar glows but burner will not come on

3. Glo bar operating and gas valve open- ing but burner will not light

4. If the ignitor remains on after main burner ignition or the valve chatters, re- verse the 120-volt A.C. connections at the wall receptacle

1.Check the following:

A.Check for 24 volts A.C. across yellow and orange wires at ignition control. If no volt- age, check microswitch and limit switch for circuit completion as well as wiring and wir- ing connections

B.Voltage present across yellow and orange wires, check for 120-volt input to ignition control across red and blue wires. If no voltage, check wiring all the way back to power supply

C.120 volts present across red and blue wires, check for 120 volts across the two white wires at ignition control. If no voltage, replace igni- tion control

D.Voltage present across the two white wires, check wiring and wire connections to glo bar

E.If wiring and wire connections okay, replace glo bar. (Glo bar broken)

2.A. Check for voltage (24 volts A.C.) at valve 40 seconds after glo bar begins to glow. If voltage present but valve not opening, replace valve

B.If no voltage at valve, check brown wire at ignition control for continuity and good con- nection

C.If wire and wire connections okay, replace ignition control

3.A. Check gas flow through burner. If no gas is coming through burner, check for obstruc- tion in gas line, main burner orifice, or main burner

B.If thermostat okay, check for 24 volt A.C. circuit completion across yellow and orange wires at ignition control. If no voltage, check for circuit completion through limit switch and microswitch

C.If voltage is present at ignition control across yellow and orange wires yet burner contin- ues to go off, replace ignition control

4.A. If polarity is okay yet burner continues to go off, check thermostat to be sure it is still com- pleting the valve circuit. If not, check for excessive amp draw in valve circuit

B.If thermostat okay, check for 24 volt A.C. circuit completion across yellow and orange wires at ignition control. If no voltage, check for circuit completion through limit switch and microswitch

C.Voltage present at ignition control across yellow and orange wires yet burner contin- ues to go off, replace ignition control

www.desatech.com

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201839

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Contents For Your Safety What to do if YOU Smell GAS OWNER’S Operation and Installation Manual DNV25PB DNV40PBFor Your Safety Dynavent Safety InformationSpecifications Product FeaturesLocal Codes UnpackingInstallation Items InstallationCheck GAS Type Locating FurnaceInstalling in Normal Frame Wall Installing ThermostatInstalling in Masonry Wall Creating Wall Opening and Mounting FurnaceRouting Thermostat Cable Locating Thermostat on WallMounting the Thermostat to Wall Connecting to GAS SupplyConnecting Furnace to Gas Supply at Front of Furnace Removing Screws on Lower Flange 40,000 BTU/Hr Model Shown Connecting Furnace to Gas Supply at Rear of FurnaceExample Providing Gas Piping to FurnaceChecking GAS Connections Pressure Testing Gas Supply Piping SystemPerformance Check Pressure Testing Furnace Gas ConnectionsOperating Instructions For Your Safety Read Before LightingOperating Furnace Normal Operating Sequence Inspecting Burner FlameTo Turn OFF GAS To Furnace Thermostat Control OperationCleaning and Maintenance Observed Problem Possible Cause Remedy TroubleshootingIgnition Failures Observed Problem Possible Cause Wire and wire connections at probe Parts Under Warranty Wiring Diagrams ReplacementParts not Under Warranty PartsTechnical Service Service HintsWhen Gas Pressure Is Too Low When Gas Quality Is BadCabinet Assembly 25,000 BTU/HR Model Illustrated Parts ListCabinet Assembly 40,000 BTU/HR Model Combustion Chamber Assembly 25,000 BTU/HR Model Combustion Chamber Assembly 40,000 BTU/HR Model Burner Assembly 25,000 BTU/HR Model Burner Assembly 40,000 BTU/HR Model Blower Assembly 25,000 BTU/HR Model Blower Assembly 40,000 BTU/HR Model 201839 Warranty Information

DNV40PB, DNV25PB specifications

Desa DNV25PB and DNV40PB are two advanced models in the range of DNV portable heaters renowned for their efficiency and innovative technology. These heaters are designed to provide reliable and effective heating solutions for various applications, from industrial settings to outdoor events.

One of the standout features of the DNV25PB and DNV40PB models is their robust construction, making them suitable for rigorous work environments. Both models are built with high-quality materials that ensure durability and resilience even in challenging conditions. This makes them an ideal choice for industries such as construction, warehouses, and agriculture, where reliable heating is essential.

The performance of the DNV heaters is enhanced by their powerful heating capacity. The DNV25PB model can deliver an impressive output of 25 kW, while the DNV40PB model boasts a strong 40 kW output. This substantial heating capability allows them to heat large spaces quickly and efficiently, providing comfort in less time and reducing energy costs. Additionally, both models come equipped with adjustable heating settings, allowing users to tailor the output to meet their specific needs.

These heaters incorporate advanced technologies that prioritize energy efficiency and safety. They are designed with smart control systems that monitor and adjust the heater's operation, optimizing fuel consumption while delivering consistent heat. Furthermore, safety features such as automatic shut-off mechanisms and overheating protection devices are integrated into both models, ensuring safe operation even in extended use.

Portability is another significant characteristic of the DNV25PB and DNV40PB models. Their compact design, coupled with built-in handles and wheels, allows for easy transport between different sites, making them highly versatile. Users can effortlessly relocate the heaters to adapt to changing conditions or requirements, enhancing their practicality.

In summary, the Desa DNV25PB and DNV40PB portable heaters are characterized by their powerful heating capabilities, robust construction, energy efficiency, and safety features. They are well-suited for various industrial and outdoor applications, offering flexibility and reliable performance. With their innovative technology and thoughtful design, these models stand out in the market, providing effective heating solutions to meet diverse needs. Whether for temporary heating at a construction site or providing warmth for outdoor gatherings, the DNV series offers dependable performance tailored to user requirements.
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