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MAIN TENA NCE
the ionizer, become thickly coated. In addition to
collecting oil mist, the unit• will also collect other
particles, such as dirt and smoke. Small quantities
these impurities will usually be flushed away as
of
the oil drains, but large quantities may adhere to
the internal components requiring occasional clean
ing. The type of oil being collected also affects
cleaning requirements.
freely or forms gummy deposits, periodic cleaning
will be required.
There are many types of oil mixtures, some
better adapted than others for mist collection.
is not always possible to predetermine the degree of
self-cleaning, but for satisfactory results, the oil
to be collected should meet the following qualifi�
cations:
Flash Point - Not below 275 deg. F.
Viscosity
Quality
Condition
Experience has proven that some materials must
be avoided. Inflammable or explosive mists present
too great a fire hazard. Highly volatile materials,
not necessarily hazardous, ma y
while
soluble residues or corrosive compounds, Animal,
and some vegetable oils, air drying oils, paints,
inks, and others that dry out, oxidize readily form
ing gums which coat the elements too effectively for
practical operation.
With due respect to these limitations, units will
operate three to six months or longer without the
need for cleaning. Even though a particular appli
cation requires more frequent cleaning, the benefits
,_,
obtained by elimination of oil mist nuisance will
usually outweigh the cleaning costs. Need for fre
quent cleaning can be reduced by eliminating some
of the dirt or smoke entering the unit or by select
ing a more suitable oil.
Extreme operating conditions (requiring cleaning
more frequently than once a week) where too much
dirt or smoke is collected, may be improved by
deliberately injecting an oil spray into the inlet air.
The source of this oil can be from the coolant in the
machine sump. By saturating the air with oil mist,
self cleaning action is greatly improved. Oil in
jection equipment (motor pump, spray nozzle with
suitable control parts and piping) can be supplied
when required.
Inspection.
assure optimum performance. Inspect daily to see
that the fan and power pack are operating properly
and that clean a1r is being discharged as outlined
under "Normal Operation".
"<111 1 .,.,
the oil does not flow
If
- Free flowing at room tempera
ture.
- Mineral oil base, stable pro-
perties.
- Preferably mist with minimum
of smoke or carbonized oil.
1
MAINTENANCE
Regular inspection of the unit will
Cleaning the Unit..
and filters should be inspected weekly for cleanli
ness. Experience after a few inspections will deter
mine the need for regular cleanings. In any event,
it is good practice to inspect the internal components
at least monthly.
is observed on cell plates, ionizer tubes, ionizer
wires, insulators, or filters, the dirty components
should be removed and thoroughly cleaned. This is
not necessary if a slight oil film is noted, but its
presence should be carefully observed during sub
sequent inspections to be sure that buildup is not
taking place. Thick layers are difficult to clean off,
It
particularly if allowed to remain for long periods.
When removing components, be careful not t o
break ionizer wires or bend cell plates. Also, be
sure to disconnect and r e c o n n ect high voltage
cables properly.
Ordinary degreasing equipment is usually quite
effective in removing oily dirt, and should be used
if available.
is not effective, a dip tank (at least 24" x 181 x 15'
for the P0-12 or 121 x 181 x 1511 for the P0-6) is
recommended. Mix a solution
d e t e r g e n t in each gallon of 130-1500F. water.
(Detergent "ALL" is recommended because it is
available and will not adversely
e a v e in-
Dip dirty components in the detergent solution and
allow to soak ten minutes. Immediately after re
moving components from the dip tank, thoroughly
rinse or hose with clean hot water. Inspect com
ponents for cleanliness and repeat aetergent dip and
rinse
necessary. Components should be metal
if
elean.
LOCATION AND CORRECTION OF FAULTS
After the unit is properly installed and adjusted,
all mist should be drawn into the duct pick-up and
no appreciable mist should be exhausted from the
unit. Any deviation from this condition indicates
the unit is under-size and a larger or additional
unit is required. Before actually changing the unit,
a thorough check of the installation is recommended
to be sure that the duct elements are properly de
signed and installed and that the unit is operating
properly. The "Check Chart" should be used as a
guide for this check as well as for locating and
correcting troubles.
CAUTION:
come in contact with electrical parts inside the
power pack or cabinet when the power pack is ener
gized. Allow at least 30 seconds after the power
pack has been turned off.
HIGH VOLTAGE to leak off to a safe value through
the resistors in the capacitor. In addition, before
touching any high voltage part it is recommended
that the part be grounded with a ground prod equipped
with a suitably insulated handle.
PRECIPITRON
For new units, cells, ionizers,
a layer of dirt or hardened oil
If
a degreaser is not available or
If
one pound of mild
of
affect the aluminum.)
During servicing, be careful not to
This will permit the
I. B. 1450-2
it
if
7
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