6
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Unit Control Box
ON/OFF Switch - Speed/Airflow Adjustment
MAC 10 LEAC2 units are equipped with a two-position rocker switch (ON/OFF) and Solid State Speed Control (SSSC), which
are located on the front side of the electrical box. (See Figure 3.)
Recommended fan speed during initial start-up and operation is at a low speed. As airflow eventually decreases due to filter
loading, fan speed may be increased by moving the SSSC first to a medium speed and eventually to a high speed. Periodic
airflow readings (per IEST specifications) should be conducted to determine the filter condition and appropriate fan setting.
Figure 3: Speed/Airflow Adjustment
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ENAC Control Card (Optional)
MAC 10 LEAC2 units will have the capability to include a unique ENAC control card in lieu of the SSSC for networking
purposes. Contact the factory for part number.
SOLID STATE
SPEED CONTROL
Turn clockwise for higher speed
Turn counterclockwise for lower speed
ON/OFF SWITCH
INCOMING POWER
CONDUIT PLATE
Figure 3 - Speed/Airflow Adjustment
I n s t a l l a t i o n , O p e r a t i o n , & M a i n t e n a n c e M a n u a l
Innovators in Clean Air Technology | www.envirco.com | Installation, Operation, & Maintenance
MAC 10
®
LEAC2
Fan Filter Unit