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5
ducting. Varying the collars’ position in the guides at the
outlet can control the quantity of air exhausted. To
determine precisely the amount exhausted, an airflow
meter is required.
2.7 Power/Speed Switch
The power/speed switch is located on the unit side.
When turned on to high or low speed, it powers the
blower and hour meter.
OCCASSIONALLY THE BLOWER MAY NOT
START ON LOW SPEED. IF THIS OCCURS,
START THE UNIT ON HIGH SPEED, THEN
SWITCH IT TO LOW SPEED.
CAUTION: Do not remove the top to access the filters
with the unit on. Removing the top and filters while
running can: (A) damage the blower motor by causing
it to overload, (B) expose potentially fatal high voltage
electrical parts, (C) expose the dangerous rotating
blower impeller.
2.8 Hour Meter
A digital hour meter is located near the power switch on
the unit side. It measures the cumulative time that the
unit is turned on to tenths of an hour. It stores its total
when the unit is unplugged. The previous total will be
displayed when the unit is on or off. It resets to zero after
99,999.9 hours of operation.
3 Maintenance
3.1 Air Filters
The standard Phoenix Guardian is equipped with three
filters that progressively filter out smaller particles. An
optional activated carbon/potassium permanganate filter
can be used, giving a fourth stage of filter media (see
section 3.1a). These filters must be checked regularly.
Operating the unit with dirty filters will reduce the airflow
and current draw, but will do no harm to the unit. The unit
can be run indefinitely with dirty filters.
CAUTION: The unit must always be operated with all
three filters and the top in place. Operating it with one
or more filters missing, the top off, and/or inferior filters
will cause amperage to increase and may cause the
motor to overload. Permanent damage could result.
The three standard filters used are listed below (as
installed in the unit from top to bottom):
A. Polyester media pad pre-filter. Actual size is 23-3/8”
x 23-3/8” x 1” thick. The white side faces up. This
filter should be replaced when the airflow is reduced,
it is visibly dirty or when it is contaminated by a
previous job.
B. 25 to 30% efficient (per ASHRAE 52.1-1992) pleated
fabric filter. Actual size is 23-3/8” x 23-3/8” x 1-3/4”.
This filter should be changed when airflow is reduced
or it is contaminated by a previous job.
C. 99.97% DOP efficient HEPA filter. Actual size is 23-
3/8"”x 23-3/8” x 12-1/2. It contains at least 175 sq. ft.
of media. This filter should be changed when airflow
is reduced or it is contaminated by a previous job.
3.1A Activated Carbon/ Potassium
Permanganate Filters
Two optional gas phase filters are available from
Therma-Stor: a disposable and a refillable. Each uses a
blend of activated carbon and potassium permanganate.
This blend removes the vast majority of contaminants
encountered in most filtering applications. The activated
carbon removes the heavier volatile organics while the
potassium permanganate removes lower molecular
weight contaminants. This is well suited to the smoke
odors present after fire damage.
The life of the media blend depends upon both the hours
used and the contamination level. Another advantage of
the blended media versus activated carbon only is that
part of the blend changes color as it loads up with
contaminants. It starts out black, then turns pink, then
brown, and finally white. It is best changed when it
passes the brown stage and begins to turn white. It has
lost most of its effectiveness at that point. When these
filters are installed, the pad filter does not need to be
installed above them. This allows the operator to check
the media color through the top grill of the unit without
removing the top.
These filters are the same size as the pleated fabric
filter. They are installed above that pleated fabric filter.
The pleated fabric filter catches carbon dust that comes
off these filters before it reaches the HEPA filter.
The refillable carbon filter is metal-framed and can be
refilled with carbon blend media purchased in 5-gallon
buckets. The amount of carbon blend media loaded into
the filter can be adjusted to the particular amount gas/
odor removal required.
The disposable filter contains 7½ pounds of active
media.
www.sylvane.com 1-800-934-9194
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