Desa CD36TN-M - Manual (Page 31)

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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.
Thermocouple
Thermopile
1/8"
Pilot Burner
Piezo
Ignitor
Figure 52 - Pilot Assembly (Millivolt)
3/8" to 1/"
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
Figure 53 - Typical Flame Pattern
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
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.