Desa DNV40NB, DNV25NB installation manual Wire and wire connections at probe

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DYNAVENT®

DIRECT-VENT NATURAL GAS HEATER

TROUBLESHOOTING

Continued

OBSERVED PROBLEM

POSSIBLE CAUSE

REMEDY

Ignition failures

5.

Burner cycles off and glo bar comes on

5.

A. Check flame sensing probe. Be sure

 

 

immediately, check the following:

 

probe is positioned in the burner

 

 

 

 

flame and glowing cherry red. Check

 

 

 

 

wire and wire connections at probe

 

 

 

 

and ignition control

 

 

 

 

B. If wire and wire connections okay,

 

 

 

 

check for voltage across brown and

 

 

 

 

orange wires at ignition control. If

 

 

 

 

no voltage, replace ignition control

 

 

 

 

C. If voltage present, check wiring and

 

 

 

 

wire connections at valve

 

 

 

 

D. If wire and wire connections okay,

 

 

 

 

replace valve

 

 

 

 

 

Excessive noise

1.

Blower out of balance

1.

Replace blower

 

2.

Motor hums

2.

Replace motor

 

 

 

 

 

Main burner will not cycle off

1.

Thermostat setting

1.

Check thermostat

 

2.

Gas valve stuck open

2.

Check gas valve. If stuck open, replace.

 

 

 

 

Do not attempt to repair valve!

 

 

 

 

 

Furnace will not operate

1.

Wiring connections or shorts

1.

Check all wiring to assure proper con-

 

 

 

 

nection or detect possible shorts

www.desatech.com

18

201835

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Contents OWNER’S Operation and Installation Manual DNV25NB DNV40NB For Your SafetyFor Your Safety What to do if YOU Smell GAS Safety Information DynaventLocal Codes Product FeaturesSpecifications UnpackingCheck GAS Type InstallationInstallation Items Locating FurnaceInstalling in Masonry Wall Installing ThermostatInstalling in Normal Frame Wall Creating Wall Opening and Mounting FurnaceLocating Thermostat on Wall Routing Thermostat CableConnecting to GAS Supply Connecting Furnace to Gas Supply at Front of FurnaceMounting the Thermostat to Wall Connecting Furnace to Gas Supply at Rear of Furnace Removing Screws on Lower Flange 40,000 BTU/Hr Model ShownProviding Gas Piping to Furnace ExamplePressure Testing Gas Supply Piping System Checking GAS ConnectionsPressure Testing Furnace Gas Connections Performance CheckFor Your Safety Read Before Lighting Operating FurnaceOperating Instructions To Turn OFF GAS To Furnace Inspecting Burner FlameNormal Operating Sequence Thermostat Control OperationCleaning and Maintenance Troubleshooting Observed Problem Possible Cause RemedyIgnition Failures Observed Problem Possible Cause Wire and wire connections at probe Parts not Under Warranty Wiring Diagrams ReplacementParts Under Warranty PartsWhen Gas Pressure Is Too Low Service HintsTechnical Service When Gas Quality Is BadIllustrated Parts List Cabinet Assembly 25,000 BTU/HR ModelCabinet 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 201835 Limited Warranty Dynavent GAS Wall Furnace International

DNV25NB, DNV40NB specifications

Desa DNV25NB and DNV40NB are contemporary heating solutions designed to meet the demands of modern residential and commercial spaces. Both models integrate advanced technologies, ensuring efficient performance while promoting sustainability and energy conservation.

The DNV25NB is a compact and versatile unit, making it ideal for small to medium-sized environments. It boasts a nominal heating capacity of 25 kW, providing a reliable source of warmth during colder months. One of its main features is the innovative heat pump technology that extracts energy from the environment, thereby lowering electricity consumption compared to traditional heating systems. The unit is also equipped with advanced inverter technology, which allows it to adjust its output according to the heat demand. This results in reduced energy usage and lower utility bills, making it an economical choice for homeowners or businesses aiming to minimize operational costs.

On the other hand, the DNV40NB is designed for larger spaces, offering a robust heating capacity of 40 kW. This model features a dual-stage compressor that enhances its heating efficiency. This technology ensures quick heating response, allowing it to maintain a consistent indoor temperature even in extreme weather conditions. Furthermore, the DNV40NB incorporates smart control systems that enable users to manage settings through a mobile app, providing convenience and remote monitoring capabilities.

Both models are characterized by their eco-friendly refrigerants, which contribute to reduced greenhouse gas emissions. The units are also designed with user-friendly interfaces featuring digital displays, making operation intuitive. Additional safety features, including over-temperature protection and anti-freeze modes, ensure safe usage while prolonging the lifespan of the units.

In terms of installation, both DNV25NB and DNV40NB are designed for easy integration into existing systems. Their compact design enables flexibility in placement without compromising aesthetics. With their reliable performance, energy efficiency, and user-centric technologies, the Desa DNV25NB and DNV40NB offer compelling solutions for those seeking sustainable heating alternatives. Overall, they represent a forward-thinking approach to climate control, combining performance with environmental responsibility.
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