Lennox Hearth DIRECT-VENT RAVENNA SDVI33/40 - Manual (Page 19)

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NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
Flame Color and Behavior
This appliance is designed for maximum heating efficiency. Therefore,
upon lighting of the main burner the flames will be semi­transparent or
“bluish.” After 10­20 minutes of operation the logs will heat up and the
flames will become a yellow/orange color.
Adjusting the appliance to cause the flames to turn orange sooner may
result in poor combustion, sooting and a hazardous situation. See Figure
17 showing proper flame appearance.
When testing for proper operation ­ If an optional thermostat is installed
adjust it to its highest temperature setting. Visually determine that main
burner gas is burning properly: i.e., no floating, lifting or flashback.
Adjust the primary air shutter(s) as required. Check for proper main
burner operation at both high and low flame.
No Blue Flame
Center
Soot at
Flame Tip
Dark Orange
Flame
IMPROPERLY
BURNING FLAME
Soot above
Flame Tip
No Soot at
Flame Tip
PROPERLY
BURNING FLAME
Semi-Transparent
Yellow Flame
Blue Flame
Center
Ports on Pan
Burner Assembly
Burner Flame Appearance
Figure 17
Paint Curing
This appliance has been painted with a high temperature metallic stove
paint. It leaves the factory dry to the touch, but finishes curing as the
appliance is used. Fire the appliance four successive times for ten minutes
each time with a five minute cool down between each firing. Ventilate the
house during these first firings as the paint gives off an unpleasant odor.
It is recommended that persons sensitive to an imbalance in the indoor
air quality avoid the appliance during the curing process.
Quiet Operation
As the appliance is burning, a number of normal operational sounds may
be heard. The flow of gas through the gas valve and orifice may make a
rushing or whistling noise. If this noise is objectionable, it can be reduced
by turning down the flame. Turning down the flame can reduce total heat
output by more than 30%. When the blower turns on, the sound of rush­
ing air may be heard. The blower sounds may be reduced by adjusting
the speed control located on the blower assembly. Also, a slight clicking
sound may be heard as the gas valve or blower switch turn on and off.
Blower Operation
This appliance comes equipped with a 150 CFM blower with a variable
speed control and an automatic temperature activated On/Off snap switch.
Operation:
1. Plug the blower power cord into a grounded (three­prong) outlet. This
appliance is equipped with a three­prong (grounding) plug for your
protection against shock hazard and should be plugged directly into
a properly grounded three­prong receptacle. Do not cut or remove
the grounding prong from this plug.
2. After the appliance warms up, the blower will turn on if the speed
control (located at the right below the firebox) is left in the "ON" posi­
tion. The blower will not operate until the appliance is warm.
3. Once the blower turns on, turn the knob to the desired speed. No
further adjustment is necessary.
4. If you do not wish to have the blower on, turn the knob until it clicks
into the "OFF" position.
Optional Wall Thermostat
If an optional wall thermostat is to be installed, install the thermostat per
the manufacturers instructions (provided with the thermostat). Failure
to follow manufacturers instructions could result in a malfunction. Pay
special attention to the thermostat location requirements. If the loca­
tion requirements are not adhered to the appliance, erratic operation or
failure may occur.
Do not mount the thermostat where it may be affected by:
• Radiant heat from this appliance, fireplaces, sun or other heat
sources.
• Drafts or dead spots behind doors or in corners.
• Hot or cold air from ducts.