TrueFRESH™ Ventilation System 69-2481EF—01
7
Balancing Steps
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 flow station to measure the
air flow in the fresh air duct and exhaust air
duct.
b.
Move the mode selector switch to adjust the
air flow in the duct with the higher reading.
INTER: Exhaust air (right)
OFF: Fresh air (left)
c. Press the (+) or (–) buttons to adjust the air
flow 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.
