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

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Desa DNV40PB, DNV25PB Creating Wall Opening and Mounting Furnace, Installing Thermostat, Installing in Normal Frame Wall
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DNV40PB, DNV25PB specifications

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