Aprilaire 8100 Ventilation Hood User Manual


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MECHANICAL INSTALLATION (CONTINUED)
DUCTING
DUCT WORK SPECIFICATIONS
•Planontemporarilyinstallingtwoairflowmeasuringdevices.Thesystemwillhavetobebalanced(BALANCING THE SYSTEM SECTION),
after all duct work has been installed. The measuring devices are removed after the system has been balanced.
•Asoundabsorberatleast6ft.long,consistingof1”thickrigidfiberglassductorinsulatedflexibleductisrecommendedformaximum
absorption of air movement sounds between the unit and the living space return grille.
•AllflexibleductsmustmeetULsafetystandardsforClass1airductsandconnectors.
•AllductingmustbeinstalledaccordingtolocalHVACcodesandstandards.
•Round6”galvanizedductorequivalentisrecommendedforallductrunsthatdonotrequireinsulation.
•Allductinglocatedinanunheatedspacemustbecompletelysealedandinsulated.
•Foroptimumperformanceandquiteoperation,allductrunsshouldbekeptasshort,straight,andequalinlengthaspossible.
•IftheERVwillnotberunningcontinuously,afieldsuppliedbutterflydampermustbeinstalledintheintakeductnearthehood.
GRILLE AND HOOD SPECIFICATIONS
•Thelivingspacereturngrilleshouldnotbelessthan75in
2
of free area. Grille surfaces less than this may produce excess air noise.
•Exteriorintakeandexhausthoodsmustbeweatherresistant.Thehoodsmustalsoincorporateascreentopreventunwanteddebris,animals,
and insects from entering the duct work. The screen should have a maximum of ¼” openings.
•Caulkbothhoodstopreventwaterleakage.
•Intakeandexhausthoodsshouldbeabovetheexpectedsnowlineoraminimumof18”abovegroundlevel,whicheverisgreater.
DUCT WORK CONNECTIONS – FORCED AIR SYSTEM
•Allductcollarsareclearlylabeledandmustbeconnectedproperly.
•Rigidductworkshouldbeconnectedtothecollarswithsheetmetalscrews.
•Flexibleductworkmustbeconnectedwithclampsorbands.
•Allductconnectionsshouldbesealedwithducttapeormastictopreventleakage.
STALE AIR FROM HOUSE
FRESH AIR FROM OUTSIDE
FRESH AIR TO HOUSE
STALE AIR TO OUTSIDE
STALE AIR FROM HOUSE
(CENTRALLY LOCATED SUCH AS HALLWAY)
AIR MOVEMENT
SOUND ABSORBER
10 FT MINIMUM
NOTE: THE FRESH AIR INTAKE SHOULD BE INSTALLED
A MINIMUM OF 10 FEET FROM ANY EXHAUST VENT.
NOTE: FRESH AIR INLET TO RETURN DUCT
10 FEET MINIMUM FROM HVAC BLOWER.
BUTTERFLY DAMPER
(IF ERV NOT RUNNING CONTINUOUSLY)
FIGURE 14 – Fully Ducted Energy Recovery Ventilator
90-1747
6
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