Harman® • PF-120 Installation Manual_R1 • 2014 -___ • 03/149
3-90-08121i
4
Termination Location and Vent Information
NOTE: Read and follow all of the vent pipe
manufacturers’ instructions on the proper installation
and support of the vent pipe. Adhere to all clearances.
NOTE: Use only 4” diameter “PL” venting system.
Be sure to inspect and clean exhaust venting system
regularly.
Theminimumventcongurationisa90°orTeeonastarter
collaranda24”lengthhorizontalthroughanexteriorwall.
Acaporotherbirdscreenontheendshoulddirecttheue
gasesdownandawayfromthestructure.Figure4.1.
The maximum horizontal length is 18 feet. The minimum
termination height above the exterior grade is 18”.The
maximumtotallengthofanycongurationis30feet.
NOTE: CleanoutTee’s should always be used on the
transitions to horizontal pipe to allow easy access for
cleaning.
Theventingcongurationgraphallowsfor(one)90°.orTee
ttinginanyconguration.
Ifmore90’s,T’s,or45’sareneededthetotallengthmustbe
adjustedtoallowfortheaddedrestriction.
Uptofour(4)additional90’s,Tee’s,orequivalent45’scanbe
addedaslongastheoveralllengthisadjustedinaccordance
withthevalueslistedbelow.
(See the Venting Conguration Graph under Section B
“LocatingYourAppliance&Chimney”)
EachVertical-----90°orTsubtract2.5feet
EachVertical-----45°subtract1.5feet
EachHorizontal-90°orTsubtract5.0feet
EachHorizontal-45°subtract2.5feet
Any exterior venting (vent pipe exposed to outside
ambient temperatures) should be kept to a minimum,
due to potential condensation problems.
Thisis especially important inhigh humidity cold weather
climates,suchasmaritimeareas,lakeshores,andlowriver
valleys.
DO NOT INSTALL A FLUE DAMPER IN THE EXHAUST
VENTING SYSTEM OF THIS UNIT.
DO NOT CONNECT THIS UNIT TO A CHIMNEY FLUE
SERVING ANOTHER APPLIANCE.
INSTALL VENT WALL PASS-THROUGH AT CLEARANCES
SPECIFIED BY THE VENT MANUFACTURER.
NOTE: All installation clearances and restrictions must
be adhered to.
NOTE: Read and follow all of the vent pipe manufacturers’
instructions on the proper installation and support of the
vent pipe. Adhere to all clearances.
INSTALLATION IS TO BE PERFORMED BY A QUALIFIED
INSTALLER.
36”
4”
4” Type “PL”
Vent Pipe
This is the minimum venting conguration.
NOTE: This would only be allowed with non-combustible walls.
Figure 4.1
A. Vent Termination Minimum Clearances
KEEP COMBUSTIBLE MATERIALS SUCH AS GRASS,
LEAVES, ETC. AT LEAST 3 FEET AWAY FROM THE
POINT DIRECTLY UNDER THE VENT TERMINATION.
(BETWEEN THE VENT AND THE GROUND)
WARNING
KEEP COMBUSTIBLES AWAY FROM FLUE OUTLET.
CAUTION
WARNING
CHIMNEY AND FLUE PIPE MUST BE CLEAN AND IN
GOOD CONDITION.