Greenheck Fan 470658 MSX manual Air Volume Measurement & Check, Set-UpOptional Components

5. Air Volume Measurement & Check

Measure the unit’s air volume (cfm) and compare it with it’s rated air volume. If the measured air volume is off, adjust the fan’s RPM by changing/adjusting the drive.

Note

The most accurate way to measure the air volume is by using a pitot traverse method downstream of the blower. Other methods can be used but should be proven and accurate.

Important

Changing the air volume can significantly increase the motor’s amps. If the air volume is changed, the motor’s amps must be checked to prevent overloading the motor.

Note

To ensure accuracy, the dampers are to be open when measuring the air volume.

6. Set-Up Optional Components

Adjust the settings on the optional components. See the Control Center Layout in the Reference section for location of optional components.

•Heating Inlet Air Sensor

Typical setting: 60-70°F (15-21°C)

•Cooling Inlet Air Sensor

Typical setting: 75°F (24°C)

•Building Freeze Protection

Typical setting: 5 minutes; 45°F (7°C)

•Dirty Filter Gauge

Typical setting: Settings vary greatly for each unit. (see Reference section for adjusting information)

® Model MSX Make-Up Air 17