Desa CHDV37N/P, CHDV41N/P Inspecting Burners, Pilot Assembly, Burner Flame Pattern

CHDV37N/P(A,B) AND CHDV41N/P(A,B)

DIRECT-VENT FIREPLACE (NATURAL/PROPANE/LP)

INSPECTING

BURNERS

Check pilot flame pattern and burner flame patterns often.

PILOT ASSEMBLY

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

The height of the thermopile must be 3/8" to 1/2" above the pilot flame as shown in Figure

53.The thermocouple must be at a height of about 1/8" above the pilot flame. The flame from the pilot burner must extend beyond both the thermocouple and thermopile.

If you pilot assembly does not meet these requirements:

•turn fireplace off (seeTo Turn Off Gas to Appliance, page 24)

•seeTroubleshooting, pages 28 through 30

Thermopile

3/8" to 1/2"

Pilot Burner

1/8"

Thermocouple

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 incor- rectly, the flames will lift or "ghost". This can be dangerous. Inspect the flames after installation to ensure proper installation and performance.

Figure 54 shows a typical flame pattern for CHDV37N(A,B), CHDV37P(A,B), CHDV41N(A,B), and CHDV41P(A,B) models.

If burner flame pattern differs from that described:

•turn fireplace off (seeTo Turn Off Gas to Appliance, page 24)

•seeTroubleshooting, pages 28 through 30

Figure 54 - Typical Flame Pattern for CHDV37N/P(A,B) and CHDV41N/P(A,B)

Piezo

Ignitor

Figure 53 - Pilot Assembly

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