Lennox DVR5-CMNS User Manual

12
Flame Appearance and Sooting
Proper flame appearance is a matter of taste.
Generally most people prefer the warm glow of
a yellow to orange-flame. Appliances operated
with air shutter openings that are too large will
exhibit flames that are blue and transparent.
These weak, blue and transparent flames are
termed anemic. If the air shutter opening is too
small sooting may develop. Sooting is indi-
cated by black puffs developing at the tips of
very long orange flames. Sooting results in
black deposits forming on the logs, appliance
inside surfaces and on exterior surfaces adja-
cent to the vent termination. Sooting is caused
by incomplete combustion in the flames and a
Jack of combustion air entering the air shutter
opening. To achieve a warm yellow to orange
flame with an orange body that does net soot,
the shutter opening must be adjusted between
these two extremes.
No smoke.or soot. should be present. Reposi-
tionthe logsas shownin Figure 27 ifthe flames
impinge on any of them.
Figure 27
If sooting conditions exist, the air shutter open-
ing on the main burner tube can be adjusted.
Normaily, the more offsets in the vent system,
the greater the need for the air shutter to be
opened further.
WARNING: AIR SHUTTER ADJUSTMENT
SHOULD ONLY BE PERFORMED BY A
QUALIFIED PROFESSIONAL SERVICE
TECHNICIAN.
Nate: |f refractories are installed, remove them
Drior to the adjustment procedure to prevent
permanent damage from soot build-up. Ensure
that the door is closed and sealed during ad-
justment.
Adjustment
CAUTION: THE ADJUSTMENT ROD AND
NEARBY APPLIANCE SURFACES ARE HOT.
EXERCISE CAUTION TO AVOID INJURY WHILE
ADJUSTING FLAME APPEARANCE.
To adjust the flame, move the adjustment rod
up or down (located in the lower control area).
Position the air shutter to the nominal setting
(Figure 28). Allow the burner to operate for at
least 30 minutes. Observe the flame continu-
ously. if it appears weak or sooty as previously
described,
adjust the air shutter by pushing or
pulling on the adjustment rod until the flame
appearance is as desired. The adjustment rod
and associated adjustable air shutter is pat-
ented technology. Flame adjustments can be
made quickly and accurately to taste without
the need of disassembling the appliance and
waiting for 30 minutes after each adjustment.
Orifice
Air Shutter
Adjusting
Set Screw
Adjustment
Rod Up
(Fully Open)
*
wea 4! Burner Tube
Nominal Air Shutter Settings
Naturaf Gas - %" Gpen
Propane Gas - 96” Open
Figure 28
Note: ifthe flame stillappears anemic with the air
shutter closed aif the way (usually a result of
lengthy vertical venting runs), turn off the appli-
ance, turn off the gas supply, wait for the parts to
cool and access the air shutter. The shutter is
prevented from actually closing by a tab that is
bent over into the opening. Remove this obstruc-
tion by bending back. Reassemble and resiartthe
appliance and after 30 minutes reobserve the
flame. Adjust the air shutter as described.
Propane models may exhibit a flame pattern
that may candie or appear stringy. If this is
problematic or persists as the appliance is
continually operated, adjust the air shutter
closedas described in the previous paragraphs.
Operate the appliance for a period of time as the
effect diminishes, ensuring that the appliance
does not develop sooty flames.
When satisfied thatthe appliance operates prop-
erly, proceed to finish the installation. Leave the
control knob in “ON” position and turn the
remote switch “OFF.” Close the lower control
compartment door.
NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.
FINISHING REQUIREMENTS
Wall Details
Complete finished interior wall..To install the
appliance facing flush with the finished wall,
position framework to accommodate the thick-
ness of the finished wall (Figures 29 and 30).
Combusiibie
Finished Wail
Materials. \
Spacers
8" Max->}
~ (203 mm)
{ 4 =r ¥ Gap
= 2° Max Required
(487mm) | (51 mm)
Wy Min
(286 mm} Top of Appliance
cx
[
Model _DVR5-R (Clean Face)
Figure 29
Combustible
Finished Wail
Materials NJ
Spacers
§" Max]
~ ae mm)
t
beat
o>}
ve
Gap
18" 2" Max Required
(457mm) | (51 mmf
eae # ‘\ Top of Appliance
E , Top of Door Frame
Model _DVA5-C (Louver Trim)
Figure 30
A hearth extension is not required with this
appliance. If a hearth extension is used, do not
blockthe lower control compartment door. Any
hearth extensions used is for appearance only
and does not have to conform to standard
hearth extension installation requirements.
Note: Combustible wall finish materials and/or
surround materials must not be allowed to
encroach the area defined by the appliance
front face (black sheet metal). Never allow
combustible materials to be positioned in front
of or overlapping the appliance front face.
f i r e - p a r t s . c o m

Lennox DVR5-CMNS Specifications

General

Brand	Lennox
Model	DVR5-CMNS
Category	Fireplace Accessories
Language	English