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7 Any _mproper operation of the common venting system
should be corrected so the installation conforms with the
National Fuel Gas Code, ANSI Z223.1 -latest revision. When
res_ztng any portion of the common venting system, the
common venting system should be resized to approach
the minimum size as determined
using the appropriate
tables in Part 11 in the National Fue! Gas Code, ANSI
Z2231-latest
revision
For boilers
for connection
to gas vents
or chimneys,
vent installations
shall be in accordance
with
Part 7,
Venting
of Equipment,
of the National
Fuel Gas Code,
ANSI Z223.1-1atest
revision
and applicable
provisions
of the local building
codes.
Vent connectors
serving
appliances
vented by natural
draft
shall
not
be connected
into
any
portion
of
mechanical
draft
systems
operating
under
positive
pressure.
ROOF
RIDGE
3/4 HT MAXIMUM
HT
'MUST
SLOPE
UP
AT
LEAST
1/4 INCH
PER FOOT
OF
HORIZONTAL
RUN
HORIZONTAL INSTALLATION
FLOW
_
NO
TO FURNACE
VENT
TO CHIMNEY
OR BOILER
DAMPER
INSTALL
VENT
DAMPER
WITH
ACTUATOR
TO SIDES OF
VENT ONLY.
DO NOT MOUNT
ABOVE
OR BELOW
VENT
VERTICAL INSTALLATION
TO CHIMNEY
FLOW
VENT
DAMPER
ACTUATOR
MAY BE
TO FURNACE_
iNSTALLEDIN
ANY POSITION
OR BOILER
U
C_N:
IX) NOT INSTALL
THE VENT DAMPER
WITHIN 6 in. (152 mm) OF
COMBUS33BLE MATERIAL
3HIMNEY
BOILER
WATER
HEATER
TYPICAL
INSTALLA'nON
FOR VENT DAMPER
NOTE CAUTION
AND FOOTNOTES
1 Install the vent damper to service only the single ap_iance for
which it is intended,if improperly installed,a hazardous cond_on,
such as an explosionor carbon monoxide pe,,sening, could result.
2_ Do not install the vent damper on vent pipecurve.
3
Do not run wires near high temperature surfaces. Use staed_ff
brackets Jfnecessary
8
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