Desa DNV25NB, DNV40NB Creating Wall Opening and Mounting Furnace, Installing Thermostat

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OWNER’S MANUAL

INSTALLATION

(Continued)

CREATING WALL OPENING AND MOUNTING FURNACE

Remove furnace front cover. Remove the two screws at the lower edges of front cover. Lift front cover away.

Installing in Normal Frame Wall

The 25,000 BTU/Hr model is designed to fit between two wall studs set at 16 inch on center. The 40,000 BTU/Hr model will not fit between wall studs. Follow the steps below to install.

1.Turn off electrical circuits that pass through mounting wall. Make sure there are no pipes or electrical wires in area you intend to cut.

2.Use stud locator or small finishing nail to find wall studs. When you locate studs, drive a small finishing nail into each stud. This provides a visual refer- ence for stud locations.

3.25,000 BTU/Hr Model: Cut an open- ing in wall between the two studs. Make opening 14 1/4" wide by 13 5/8" high (see Figure 2). IMPORTANT: You must install furnace horizontally. Do not install furnace vertically.

40,000 BTU/Hr Model: Cut a 20 5/16" wide by 14 3/8" high opening in wall (see Figure 2). Start your cut right next to stud you are going to anchor cabinet to. Cut across wall and through the next stud. Stop cut at proper width. IMPORTANT: You must install furnace horizontally. Do not install furnace ver- tically.

4.25,000 BTU/Hr Model: Mark screw locations on wall (see Figure 2). Make sure screws will anchor into studs. Make sure screw locations match screw holes on cabinet flange.

40,000 BTU/Hr Model: Mark screw locations on wall (see Figure 2). Make sure screws on one side will anchor into studs. Screws on other side will only anchor in wall material. Make sure screw locations match screw holes on

cabinet flange.

5.25,000 BTU/Hr Model: Use a proper- sized drill bit. Drill holes through wall and into studs at marked locations.

40,000 BTU/Hr Model: Use a proper- sized drill bit. On wall stud side of opening, drill holes through wall and into studs at marked locations. On other side, drill holes through wall material.

6.Insert furnace into opening. Do this from inside the room. Secure furnace to wall with four large screws provided.

7.On outside of wall, caulk opening be- tween the cabinet and the rough edges of opening.Wall Studs

 

14 1/4"

Approx.

Approx.

13

Screw

Screw

Locations

5/

Locations

8"

 

Wall

 

 

Opening

 

25,000 BTU/Hr Model

 

Wall Studs

 

Approx.

20 5/16"

 

 

14

Screw

 

Locations

 

3/

 

 

8"

Wall Opening

40,000 BTU/Hr Model

Figure 2 - Wall Openings and Screw Locations

Installing in Masonry Wall

You can mount both models in a masonry wall. Follow the steps below to install.

1.Cut opening in wall. Make opening 14 1/4" wide by 13 5/8" high for 25,000 BTU/Hr models. Make opening 20 5/16" wide by 14 3/8" high for 40,000 BTU/Hr mod- els. IMPORTANT: You must install furnace horizontally. Do not install fur- nace vertically.

2.Secure furnace to wall with toggle bolts or hook bolts set in mortar.

3.Insert furnace into opening. Do this from inside the room. Secure furnace to wall with toggle bolts or hook bolts.

4.On outside of wall, caulk opening be- tween the cabinet and the rough edges of opening. You can also use mortar to seal opening.

INSTALLING THERMOSTAT

WARNING: Unplug furnace before installing thermostat.

Mount the thermostat directly on the fur- nace or on a wall in another part of the room. If you have solid or masonry walls, mount the thermostat on the furnace.

Mounting Thermostat to Furnace

1.Unplug furnace.

2.Locate red and white thermostat wires coming out of side of furnace. These wires are labeled “Thermostat.”

3.Cut thermostat wires to desired length.

4.Route thermostat wires through slot/ hole in side of thermostat mounting plate. Then route wires through 5/8" diameter hole in center of plate (see Figure 4, page 6).

5.Connect thermostat wires to the two terminal screws on back of thermostat (see Figure 3). Connect red wire to “R” terminal. Connect white wire to “W” terminal.

White Wire

W

R

Red Wire

Figure 3 - Connecting Thermostat Wires to Thermostat

Continued

201835

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Contents For Your Safety What to do if YOU Smell GAS OWNER’S Operation and Installation Manual DNV25NB DNV40NBFor 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 201835 International Limited Warranty Dynavent GAS Wall Furnace

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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