Air Shutter Setting - Heat & Glo MEZZO36-C Installation Manual

F. Air Shutter Setting
WARNING! Risk of Explosion or Delayed Ignition!
Improperly adjusted air shutter could cause soot buildup.
NOTICE: If sooting occurs, provide more air by opening
the air shutter.
Air shutter settings may be adjusted by a qualified install-
er at the time of installation. The air shutter is set at the
factory for minimum vertical vent run. Adjust air shutter for
longer vertical runs. See Figure 9.6.
Air shutter settings should be adjusted by a qualified ser-
vice technician at the time of installation. The air shut-
ter is set at the factory for a typical horizontal termination
through a 2 X 6 wall. See Figure 4.11 Top Vent - Horizon-
tal Termination With One Elbow.
• Refer to Gas Service Access instructions in Section 9.C
to access the air shutter.
• Loosen the 1/4 in. screw.
• Twist shutter to adjust.
• Shutter may be open for longer horizontal vent runs.
• Do not close the air shutter more than 1/16 in. for NG or
1/4 in. for propane.
• Tighten the screw.
Shutter Setting Verification / Flame Appearance
• After 15 minutes, the flames will be a yellow/blue mix.
The front flames may be blue at this time.
• After 30 minutes, the flames should be yellow with
some blue flames near the burner ports.
• After 1 hour, the flame will be at its maximum maturity.
NOTICE: Flames should not appear orange or stretch
to the top of the firebox. If flames are dark orange with
dark, smoky tips, provide more primary air to the burner
by opening the air shutter accordingly.
56 Heat & Glo • MEZZO36-C/ST-C, MEZZO48-C/ST-C, MEZZO60-C/ST-C, MEZZO72-C/ST-C Installation Manual • 2600-980 Rev. D • 9/19
Air Shutter Settings
MEZZO36-C
MEZZO36ST-C
MEZZO48-C
MEZZO48ST-C
GLASS REFRACTORY
KIT
LOG KIT
MEZZO60-C
MEZZO60ST-C
GLASS REFRACTORY
KIT
LOG KIT
MEZZO72-C
MEZZO72ST-C
GLASS REFRACTORY
KIT
LOG KIT
DETAIL
Figure 9.6 Air Shutter Location
NG Propane
Standard Standard
Opening= Opening=
3/16 in. Full Open
1/4 in. Full Open
NG Propane
Standard Standard
Opening= Opening=
3/8 in. Full Open
3/8 in. Full Open
NG Propane
Standard Standard
Opening= Opening=
1/2 in. Full Open
1/2 in. Full Open