Air Shutter Setting - Heat & Glo MEZZO36 Installation Manual

F. Air Shutter Setting
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.
• Refer to Gas Service Access instructions in Section 9.C
to access the air shutter.
• Loosen the 1/4 in. screw.
DETAIL
Figure 9.6 Air Shutter Location
Heat & Glo • MEZZO36, MEZZO36ST, MEZZO48, MEZZO48ST Installation Manual • 2300-970 Rev. L • 5/15
• 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.
NOTICE: If sooting occurs, provide more air by opening
the air shutter.
Air Shutter Settings
MEZZO36
MEZZO36ST
MEZZO48
MEZZO48ST
GLASS REFRACTORY
KIT
LOG KIT
MEZZO60
MEZZO60ST
GLASS REFRACTORY
KIT
LOG KIT
MEZZO72
MEZZO72ST
GLASS REFRACTORY
KIT
LOG KIT
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
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