Air Quality Engineering M660, Owner'S Manual

Page: 10 / 15

10
MAINTENANCE
- CAUTION -
Always disconnect the power to the M66O before
working on or near the air cleaner.
FILTER MAINTENANCE/REPLACEMENT
Dirty air passes through the prefilter. The prefilter
removes large particulate. The primary filter then
captures the remaining particulate.
As the contaminant load on the filters increases,
the filters become more efficient in capturing the
smaller particles. At the same time, however, the
dirty filter allows less air to pass through resulting
in less particle collection and a decrease in the
overall effectiveness of the air cleaner.
The M66O Air Cleaner is equipped with a pressure
gauge which indicates the restriction to airflow
caused by the filters loading with particulate.
When the air filter gauge reaches the red arrow or
a noticeable reduction in airflow occurs, it is time
to clean or replace the prefilter and possibly the
primary filter.
NOTE: An increase of one inch on the gauge
would be approximately a 25% decrease in
airflow. If the reduction in airflow is not a
problem, the air cleaner can be operated
beyond this point. The red arrow can be
moved to the point at which the decrease in
airflow becomes a problem.
Step 1
Turn off the air cleaner. Open up the filter access
doors and slide out the prefilter.
Step 2
Replace the prefilter and turn on the air cleaner.
The reading on the air filter gauge should be at or
near the green arrow. If no performance
improvement is evident after cleaning or replacing
the prefilter, the primary filter will have to be
replaced. In most cases, the prefilter can be
replaced several times before the primary filter will
need to be replaced.
Step 3
Replace the primary filter with the access door
open, remove the hoops from the retainers. The
retainers should remain attached to the blower
grill. The filter then can be removed by sliding it
out along the tracks. A new primary filter can be
replaced with the process reversed.
Optional Step 3
When a carbon filter is in place and the extended
service filter is used the retainers are not
necessary and should be ignored. The extended
service filter can be removed by sliding it out along
the tracks. A new extended service filter can be
replaced into the tracks.
MANOMETER GAUGE MAINTENANCE
Check the oil level occasionally and adjust the
zero knob as required. Be sure all pressure is
removed by turning the air cleaner off before
adjusting the zero knob. If it becomes necessary
to add more oil to the gauge, be certain to use
only Dwyer Red Oil that is provided with the air
cleaner. Other fluids may damage the gauge. To
fill the gauge first max out (turn clockwise) the
zero adjust knob (lower left). Unscrew the fill cap
(upper left). Pour in oil. Oil is thick so be patient.
Screw back on the fill cap. If oil is past the zero
level back out (turn counter clockwise) the zero
adjust knob.
Clean the gauge with a soft cloth using a little pure
soap and water. Use of a small brush will aid in
cleaning the knobs. Avoid cleaning fluids and
liquid soaps, which may have chlorinated solvents
in them as they may damage the gauge.
- WARNING
–
It is the customer’s responsibility to determine the
suitability of the carbon filter for any particular
application or purpose. The effectiveness of
activated carbon must be routinely monitored. In
addition, certain substances can combine in the
carbon that can result in a fire hazard. Air Quality
Engineering, Inc., accepts no liability for the
activated carbon effectiveness or fire hazard.