ENVIROMAC MAC1 107.1017 - Manual (Page 2)

ABOUT THE PRODUCT
PRINCIPLE OF OPERATION
The ENVIROMAC
 Mobile Welding
Smoke Extractor/Mobile Dust Extractor
(107.1017) is a HEPA media type Air
Cleaner operating on a three-stage
filtration principle. After the contaminant
is picked up at the hood of the Snorkvac
Fume Extractor Flex Arm it is then
drawn through the flex arm and through
the fan assembly and discharged to the
inside part of the prefilter which traps the
larger particles. The air then enters the
HEPA filter. The filter efficiency of the
HEPA media is 99.997% down to a size
of .3 micron. The filtered air from the
HEPA filter is discharged out the 2
doors. The 2 doors contain charcoal,
which eliminates some gases that might
be in the filtered air stream. The prefilter
and HEPA filters collect particulate only
and do not filter gases, which is the sole
purpose of the charcoal door filters.
MAJOR COMPONENTS
The ENVIROMAC
 Mobile Welding
Smoke Extractor/Mobile Dust Extractor
(107.1017) is a self-contained unit
comprised of a fume extractor flex arm
(for source capture), fan and motor
assembly, (1) throwaway paper prefilter,
(1) HEPA filter, (2) carbon door filters,
complete cabinet housing and an
electrical compartment which also
includes a contactor overload.
A) PREFILTER AND HEPA FILTER
This filter combination is the most
efficient combination of filters available.
The suction will deteriorate at the hood
as the filters load up with particulate.
Eventually the filters will have to be
replaced. The prefilter (107.1016) is a
throwaway paper filter. To commence
replacing the prefilter, you must remove
the door at the front of the machine. This
door is removed by removing the (2)
plastic knobs near the bottom of the door
and then pulling the door out on an angle
so the door is free from the (2) welded
bolts. You then pull down on the door to
let it slide down from the top of the door.
You remove the combination prefilter
and HEPA filter by lowering the scissor
jack with a ratchet. Then slide out the
assembly. You remove the prefilter from
the inside of the HEPA filter. You can
now put the new prefilter inside of the
HEPA filter. DO NOT BLOW OUT
THE LARGER HEPA FILTER. THIS
IS A THROWAWAY FILTER. THE
MEDIA IS VERY SENSITIVE AND
YOU WILL BLOW A HOLE IN THE
MEDIA IF CLEANED WITH
COMPRESSED AIR. You can now
install the complete filter assembly back
into the machine and tighten the filter by
raising the scissor jack. Make sure the
filter is resting on the back of the filter
cradle butted up against the tab locators.
Make sure that the top of the filter fits
inside the top plate that has a 1” lip on it.
Make sure the scissor jack is high
enough to allow an airtight seal on the
top of the filter gasket. Caution should be
taken not to apply too much pressure to
the filter assembly or you could distort
and damage the filters if too much
pressure is applied.
B) CHARCOAL FILTERS
Both doors contain the charcoal filters.
They should be replaced 1 or twice a
year in a normal welding environment.
C) ELECTRICAL COMPARTMENT
The unit operates off 120 volts single
phase utilizing a 20-amp service outlet.
The motor draws about 17.5 amps under
full load conditions. There is a contactor
and an overload inside this compartment
and the overload are set at about 20%
above the 17.5 amps. This will
automatically shut off power to the motor
in the event of an overload. This gives
full protection to the motor. The unit has
a spring activated on/off dual switch on