Lifebreath 1500E-ECM, Installation Manual

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Page 12
A
DJUSTING THE
A
IRFLOW
(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.