Envirco MAC 10 LE-AC - Manual (Page 15)

MAC 10 LE-AC SERVICE MANUAL
4 1 E G A P
8 ON/OFF Switch - Speed/Airflow Adjustment
All MAC 10 units are equipped with a three-position rotary switch, which is located on
the side of the electrical box. (See Figure 8)
Recommended fan speed during initial start-up and operation is the “LOW” speed. As
airflow eventually decreases due to filter loading, fan speed may be increased by
moving the rocker switch to the top or “MEDIUM” position, and finally to the “HIGH”
position. Periodic airflow velocity readings (Per I.E.S.T. Specifications) should be
conducted to determine the filter condition and appropriate fan speed setting.
Figure 8 – 3 Speed Switch Adjustment
ON/OFF Switch Electrical Entrance 3-Speed Switch