Honeywell Home VNT5200E1000 - Page 35

AirowMeasurements-VNT5070only(continued)
M33131
HIGH
HIGH
LOW
LOW
MAGNEHELIC
MAGNEHELIC
PRESSURE
PORT
EXHAUST AIR
FRESH AIR
TrueFRESH™ ERV/HRV Ventilation Systems 69-2480EF—17 33
Pre & Post Balancing Steps
1 a. Installtheexibleductinnerliner(vaporbarrier)overthecollarandsealwithtape,mastic,etc.
 Note-exibleinsulationshouldbepulledbackandawayfromtheductcollartoallowaccessto
pressure ports.
b. Proceed with balancing steps described below.
c. Plug the pressure ports.
d. Pullexibleductinsulationoverductcollarandstuffinsidethedoublecollar;sealinsulationto
duct collar with tape.
a. Measure pressure differential across the EXHAUST air stream high and low ports using a
Magnehelic gauge or other pressure gauge.
b. Measure pressure differential across the FRESH air stream high and low ports using a
Magnehelic gauge or other pressure gauge.
c. Lookupcorrespondingairowsfromthepressure-airowcorrelationtable.
d. Adjustairowstoabalancedconditionbyadjustingblowermotorspeeds.
e. Usuallytheblowerwithmoreairowisadjustedtothelowerblowerairowrate.
f. Motor adjustments are described in previous section.
Balancing Steps
2