THERMOSTAT SENSING BULB

BLUE FLAME NATURAL GAS HEATER

INSTALLATION

Continued

THERMOSTAT SENSING BULB

The thermostat sensing bulb has been placed inside the heater for protection during shipping.

Locating Thermostat Sensing Bulb

1.Remove front panel of heater (see Fig- ure 7).

2.Locate thermostat sensing bulb just under burner assembly.

IMPORTANT: Attach thermostat sensing bulb to back of heater for proper operation.

Attaching Thermostat Sensing Bulb

1.Remove thermostat sensing bulb from holders inside heater. Route through slot opening in bottom of heater.

2.Place clamp on thermostat sensing bulb as shown in Figure 5. Clamp is pro- vided in hardware package.

3.Snap clamp into upper mounting hole as shown in Figure 5. Mounting hole is located on lower left edge on back of heater. Make sure the thermostat sens- ing bulb is pointing up.

Thermostat

Locating Thermostat Sensing Bulb Sensing

Bulb

Clamp

Figure 5 - Attaching Thermostat Sensing Bulb

INSTALLING HEATER TO WALL

Mounting Bracket

Locate mounting bracket in heater carton. Remove mounting bracket from heater carton.

Figure 6 - Bracket Location

Removing Front Panel Of Heater

1.Remove two screws near bottom cor- ners of front panel.

2.Lift straight up on grill guard until it stops. Grill guard will slide up about 1/4".

3.Pull bottom of front panel forward, then downward.

4.Remove cardboard packing from grill and glass.

Figure 7 - Removing Front Panel Of Heater

Methods For Attaching Mounting Bracket To Wall

Only use last hole on each end of mounting bracket to attach bracket to wall. These two holes are 16 inches apart from their centers. Attach mounting bracket to wall in one of two ways.

1.Attaching to wall stud

2.Attaching to wall anchor

Attaching to wall stud: This method pro- vides the strongest hold. Insert mounting screws through mounting bracket and into wall studs.

Attaching to wall anchor: This method allows you to attach mounting bracket to hollow walls (wall areas between studs) or to solid walls (concrete or masonry).

Decide which method better suits your needs. Either method will provide a secure hold for the mounting bracket.

Marking Screw Locations

1.Tape mounting bracket to wall where heater will be located. Make sure mounting bracket is level.

Attaching Thermostat Sensing BulbWARNING: Maintain minimum clearances shown in Figure 8. If you can, provide greater clear- ances from floor and joining wall.

2.Mark screw locations on wall (see Fig- ure 8).

Note: Only mark last hole on each end of mounting bracket. Insert mounting screws through these holes only.

3.Remove tape and mounting bracket from wall.

11"

16"

Min.

 

AdjoiningWall

 

Only Insert Mounting

18 3/4"

 

 

Screws Through Last

 

 

Min.

 

 

Hole On Each End

 

 

 

 

 

Floor

 

 

30,000 Btu/Hr Model

 

 

7 1/4"

16"

 

 

Min.

 

 

AdjoiningWall

Only Insert Mounting

18 3/4"

Screws Through Last

Min.

 

 

Hole On Each End

 

 

 

Floor

20,000 Btu/Hr Models

Figure 8 - Mounting Bracket Clearances

8

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Desa CGN20TB Installing Heater To Wall, Locating Thermostat Sensing Bulb, Attaching Thermostat Sensing Bulb, Continued