Harman PF-120 - Tube Heat Exchanger Cleaning Mechanism

Harman® • PF-120 Installation Manual_R1 • 2014 -___ • 03/1420
3-90-08121i
B. Blower Assembly
Installtheblowermountingbracketsontheblowerasshown
inFigure5.8.
1. Install(4)TekscrewsoneachsidewhereshowninFigure
5.8.Startwiththetwocenterscrews.
NOTE:Therearetwosmallholesinthedischargeendofthe
blowerthatmatchthetwocenterholesonthesmallangle
oftheblowerbracket.Thetwo(2)outerholesaredrilledby
theTekscrews.
2. Mountblowerwithbracketsinstalledonthefurnaceas
showninFigure5.9.Eachsidewillrequire6Tekscrews.
MountingScrews
NOTE: These Blower Motors are not designed to be
operated without any positive static back pressure.
OPERATION WITHOUT SUPPLY DUCT WORK OR IN
FREE AIR WILL CAUSE MOTOR OVERLOAD AND
PREMATURE FAILURE.
3. Mountthelterboxonthefurnacewith(6)#10x3/4Tek
screws,3oneachsideFigure5.10.Visuallylocatethese
holessoyouarefamiliarwiththeirlocationonthelter
boxandthefurnace.Accesstothemountingholescan
begainedthroughthebloweraccesspanelcoverandthe
lteropening.Figure5.11.
Note: Twopiecesof2x4stackedlayingatontheoor12
inches from the blower opening will support the lter box
duringinstallation
Figure 5.8
Figure 5.9
Figure 5.10
Figure 5.11
Regardless of the supply air duct size installed, the
DistributionBlowerMotorMUSTbecheckedforrunning
Amperage. Check the motor name plate for the full
loadAMPS.Iftheamperageisrunninghigherthanthat
listed,asupplyairrestrictingdampermayberequired
toincreasethesupplyplenumpositivestaticpressure.
CAUTION
!