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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 Installthe vent damper to service only the single ap_iance for
which it is intended,if improperly installed,a hazardous cond_on,
such as an explosionorcarbon 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