BalancingSteps
ERV/HRVVentilationSystems69-2480EF—01 25
LED
3-POSITION
SELECTOR SWITCH
SPEED CONTROL
BUTTONS (+ AND -)
Speed
Control
Open for
Instructions
M32371
a.EnsurethatthespeedcontrolselectorswitchisineithertheINTERorCONTposition.
b.Pressthe(+)and(–)buttonssimultaneouslyfor5secondsuntiltheLEDindicatorlightturns
 yellow,whichindicatesthatyouareinbalancingmode.
Wheninbalancingmode,theselectorswitchbecomesthe motorselectorswitch.Theswitch
positionsbecome:INTER=Rightmotor(exhaustair),CONT =Bothmotors,andOFF=Left
motor(freshair).
a.Useapitottubeorowstationtomeasurethe
 airowinthefreshairductandexhaustair
 duct.
b.Movethemodeselectorswitchtoadjustthe
 airowintheductwiththehigherreading.
 INTER:Exhaustair(right)
 OFF:Freshair(left)
c.Pressthe(+)or(–)buttonstoadjusttheair
 owtothedesiredhighspeedsetting.
d.MovethemodeselectorswitchtotheCONT
 position(toproportionallyadjustthespeedof
 bothmotorsatthesametime.
FRESH AIR DUCT
(LEFT)
STALE AIR DUCT
(RIGHT)
2
1
a.Pressthe(+)and(–)buttonssimultaneouslytoexit
 balancingmode.
b.Indicatorlightturnsgreen.
c.Continuousspeedwillbe50%ofmeasuredCFM.
3
NOTE: PerformthebalancingstepswiththeHVACequipmentfanturnedON iftheERV/HRVunit
isductedintoanHVACsystem.