Desa CD36TN-M Continued, pilot assembly, Burner Flame Pattern, Burner orifice conversion

Models: CD36TN-M

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pilot assembly

Operating fireplace

Continued

The blower helps distribute heated air from the fireplace. Periodically check the louvers of the firebox and remove any dust, dirt or other obstructions that will hinder the flow of air.

Inspecting Burners

Check pilot flame pattern and burner flame pat- terns often.

pilot assembly

The pilot assembly is factory preset for the proper flame height. Alterations may have occurred dur- ing shipping and handling. Call a qualified service person to readjust the pilot if necessary.

The position and pattern of the pilot flames in relation to the sensing devices should be as shown in Figure 52.

If you pilot assembly does not meet these requirements:

turn fireplace off (see To Turn Off Gas to Ap- pliance, page 28)

see Troubleshooting, page 35

Thermopile

3/8" to 1/2"

•see Troubleshooting, page 35 Pilot Burner Figure 52 - Pilot Assembly (Millivolt) 1/8"

BURNER FLAME PATTERNThermocouple

Piezo

Ignitor

Figure 52 - Pilot Assembly (Millivolt)

BURNER FLAME PATTERN

Burner flames will be steady; not lifting or floating. Flame patterns will be different from unit to unit and will vary depending on installation type and weather conditions.

If the vent configuration is installed incorrectly, the flames will lift or "ghost". This can be danger- ous. Inspect the flames after installation to ensure proper installation and performance.

Figure 53 shows a typical flame pattern.

If burner flame pattern differs from that de- scribed:

turn fireplace off (see To Turn Off Gas to Ap- pliance, page 28)

see Troubleshooting, page 35

Figure 53 - Typical Flame Pattern

Conversion

Instructions

The conversion kit must be installed by a qualified service agency.

The conversion kit is packaged with the unit. Please check contents before beginning this conversion.

Before proceeding, make sure gas control valve is in the OFF position, all electrical power to appli- ance is off and fireplace is cool to the touch.

Remove glass door to access the log and burner assembly as follows:

1.Remove lower louver panel (see Removing Lower Louver Access Panel, page 26).

2.Remove top louver trim panel (see Removing Top Louver Trim Panel, page 26).

3.Remove glass door panel (see Removing Glass Door, page 25).

Burner orifice conversion

1.Remove top, rear and base logs, see Figure 54, page 32.

2.Remove two screws holding pilot bracket to rear of burner pan. (see Figure 54, page 32).

3.Remove two screws holding rear log stand to rear panel of firebox (see Figure 54, page 32).

4.Expose main burner orifice by lifting burner pan assembly off orifice mount.

5.Use a 1 1/8" wrench on bulkhead fitting and an 11/16" wrench to remove main burner orifice (see Figure 55, page 32).

6.Apply thread sealant to make end of the #55 main burner orifice included with kit and remount orifice into bulkhead fitting.

118531-01A

www.desatech.com

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Desa CD36TN-M Continued, pilot assembly, Burner Flame Pattern, Burner orifice conversion, see Troubleshooting, page