Envirco MAC 10 LE-AC - Manual (Page 16)

MAC 10 LE-AC SERVICE MANUAL
5 1 E G A P
9 Trouble Shooting:
Unit is not adjustable
Step 1. Verify that rotation of the knob on the visual speed control does not change the
RPM or Flow Index display on the unit. If rotating does nothing, remove the electrical
box cover and remove the 4-pin connector from the Visual Speed control and install in
180 degrees rotated. Again adjust the knob. The 4 pin connector is on the 18” (31.8
mm)white conductor.
Low Air Velocity
Step 1. Check prefilter media; replace or clean as necessary.
Step 2. Adjust visual speed control for higher blower output.
Step 3. Check power supply for proper voltage, amperage and distribution frequency.
Step 4. Replace HEPA filter if the air velocity remains low.
High Air Velocity
Step 1. Adjust visual speed control for lower blower output.
Non-Laminar Flow and/or Excessive Contamination
Step 1. Insure that no large obstructions are upstream of airflow pattern.
Step 2. Determine that no other air-moving devices are operating in or around clean
room which disrupt room’s airflow pattern.
Step 3. Check air velocity and if low, conduct the “Low Air Velocity” procedure outlined
above.
Step 4. Conduct smoke and photometer test on HEPA filter. Seal or replace HEPA filter
as necessary.
Contact Technical support at:
ENVIRCO
101 McNeill Road
Sanford, NC 27330, U.S.A.
Tel: (919) 775-2201
Tel: (800) 884-0002