Manual

ManualsBrandsICP ManualsHeating & cooling combined unitOfficial ICP air conditioner

6. Air Distribution System

Forairflowdata(blowerperformancedata,blowerspeedtapsettings,etc.)seetheTechni-

calData Sheetattachedto the unit..

Ductwork

Ductwork Insulation

Itisrecommendedthat ductworkinstalledoutdoorshaveaminimumof2" (51mm)offiber-

glassinsulationandbe coveredby aweatherproofvapor barrierthat isprotectedagainst

damage.Caulkingandflashings,or othermeansadequatetoprovidea permanentweath-

er seal,must be used.

Itisrecemmendedthatductworkinstalledin atticsorotherareasexposedtooutdoortem-

peratureshaveaminimumof 2" (51ram)fiberglassinsulationand havean indoortypeva-

por barrier.

Ductwork Connections

Theuseof flexible, non-combustibleconnectorsbetweenmaintrunk ductsand supply

and returnair plenumsis recommendedto minimizevibrationtransmission.

NOTE: Connectsupplyand returnair plenumsto unitin a mannerthatwill allowthe topof

the unitto be removedwithoutremovingplenums.PlenumsMUSTbe individuallysealed

to unitcasing.DuctsMUST be terminatedinsidestructure.

Filters

All returnair MUSTpassthrough a fieldsuppliedfilterbefore enteringthe unit.If used,an

electronicair cleaner MUSTbe installed in the return air ductwork. Minimum recom-

mendedfilter areasare listed in FIGURE16 and arebasedon a velocityof 300 ftfmin

(12m/s) for disposablefiltersand 500 ff/min(2.54m/s)for washablehighvelocityfilters.

CAUTION

NOTE:Thetotal heatgain ofthestructuretobe conditionedas expressedintotal Btuihr

should be calculatedby manufacturer's methodor in accordancewith"A.S.H.R.A.E

Guide"or"Manual J - LoadCalculations"publishedbytheAir ConditioningContractorsof

America. Thetotal heatgaincalculatedshouldbe equaltoor lessthan the coolingcapac-

ityoutput basedon D.O.E.test procedures,steadystate efficiencytimes input.

Ductwork,supplyregisters,and returnair grillesMUST be designedand sizedto handle

the unit'scoolingair volume requirements,tf the unitis connectedtoan existingsystem,

theductworkMUSTbecheckedtomakesureitis adequate.Extrarunsorlargerductsizes

mayhaveto be installed.

Maximumrecemmendedvelocityintrunkductsis1000feetperminute(5.08m/s).Velocity

in branchesshouldnot exceed800feet perminute(4.06m/s).Refertothe TechnicaIData

Labelon the unit forunit air volumerequirementsand systemsizing recommendations.

NOTE:Ductworksizingaffectstemperatureriseand coolingtemperaturedifferential.Be

sureto properlysizeductworkto the capacityand airflowcharacteristicsof your unit.Fail-

ureto doso canaffectlimitcontrols,compressors,motors,andother componentsandwill

leadto prematurefailure of components. Thiswillalso adversely affectday to dayunit

performance.

FlexibleDuctKitsareavailablefrom yoursupplierto effectpropersizingand installationto

MobileHomesandother standardconstruction..

Referto unitratingplatefor properElectricHeatAccessorysizing andsee the Tempera-

tureRiseChecksectionintheElectricHeatAccessorylnstallaUonSectionofthismanuaL Do NOT operate the unit without all filters in place.

FIGURE 16 Recommended Filter Sizes

NOTE: Somefiltersaremarkedwithan arrowto indicatethe properdirectionof air flowthroughthe filter. The airflow directionwill betowardsthe blower motor.Makesurefilter i

installedcorrectly.

21/2

31/2

Nominal Tons

Air Conditioning

Nominal Air Flow

Cubic Feet

per Minute

700-900

900-1100

t100-1300

1300-1500

1500-1700

1900-2100

Recommended Filter Sizes

Sq. In. Surface Arep/Nominal Size

Disposable Filters

400 or 20 x 25

487 or 20 x 30

576 or 14 x 25 (2Req.)

665 or 16 x 25 (2Req.)

753 or 20 x 25 (2 Rea.'_

960 or 20 x 30 (2 Req.'l

Cleanable Filters

246 or 15 x 20

30t or 14x25

356 or 16 x 25

411 or 20 x25

466 or 20 x 25

575 or 24 x 25