Lifebreath 2000EFD - Adjusting Airflow - 2000 Units; 2000 Series Airflow Adjustment via Sheaves

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Page 12
ADJUSTING THE AIRFLOW (2000 UNITS)
The belt drive system is adjustable to provide a wide range of airflow. Each motor is equipped with a variable
pitch sheave that permits an independent airflow adjustment. The sheaves have been factory set to provide
the optimum airflow without exceeding the amp draw on the motor for normal applications. The pitch
diameter may be decreased to reduce the airflow provided by the blower. To decrease the pitch diameter,
remove the setscrew on the sheave furthest from the motor and rotate half the sheave in a counter-clockwise
direction. Tighten the setscrew and adjust the tension in the belt. This technique can be used instead of
dampers to efficiently balance the HRV system. Each motor should never draw more than the rated amps (see
table below) with the doors of the unit closed and attached to the duct system.
Unit
Voltage (Vac)
Rated Amps for Motors
MCA
MOP
One
Two
2000IFD
240
9.0
18.0
22.5
30
2000IFD-208
208
3.0
6.0
14.75
20
2000IFD-208SP
208
10.4
20.8
26
30
2000IFD-460
460
2.6
5.2
6.5
15
2000IFD-575
575
2.0
4.0
5
15
2000EFD
240
9.0
18.0
22.5
30
2000EFD-208
208
3.0
6.0
14.75
20
2000EFD-208SP
208
10.4
20.8
26
30
2000EFD-460
460
2.6
5.2
6.5
15
2000EFD-575
575
2.0
4.0
5
15
Warning
• If adjustments are made to the pitch diameter, AMP readings must be made to ensure the MAX amp
load per motor is not exceeded. Refer to the table to obtain the motor amp load for the unit.