Sundstrom SR 99-1 Technical manual

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Operation instruction
SR 99-1
Compressed air filter
Revision: 02

General information
Instructions for use for SR 99-1 should be read before use.
Breathable air must meet at least the following purity requirements:
• the impurities must be maintained at a minimum and must never exceed the hygienic limit value.
• the content of mineral oil must be so low that no smell of oil will be detectable (the odor limit is around 0.3
mg/m3 ).
• the dew point of the air must be so low that no water will be precipitated out and no freezing will occur inside
the equipment.
For further particulars of breathable air, see EN 132:1998, EN 12021:2014 and possibly other national
regulations.
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1. Use
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When the filter is used to its maximum capacity, i.e 3 connected users
the available compressor capacity must be at least 900 l/min. The
consumption of any tools connected to this system must be added to
the above values.
The compressor air intake must be located so that there will be no
risk of polluted air being drawn into the system.
The supply pipe to the compressed air filter must have an inside
diameter of at least 11 mm to ensure that it can deliver the maximum
air flow rate.
. 1.1 The filter has two outlets
one of which is plugged prior
to delivery.
Fit the safety coupling
supplied.
1.2 The inlet thread of the
filter is 1 /2” BSP female.
Fit a suitable coupling/nipple

Use
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1.3 The filter is automatically
drained to the given level.
The drain can also be opened
manually by turning the pre-
collector at the bottom of the
drain bowl.
1.4 The filter element is fitted
prior to delivery. Note the
date on the label at the
outside of the filter housing to
be enable you to keep track
of the date when the filter
should be changed.
1.5 The SR 99-1 is equipped
with keyhole mountings for
mounting it on a wall, but it
can also be stood on a
suitable surface.

2. Filter change
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Under normal operating conditions, the filter element has a useful life
of around six months. However, the useful life may vary widely,
depending on the condition of the compressed air system and the air
flow rate through the filter.
The condition of the filter element can be assessed by weighing. The
original weight is shown on the filter element. If the weight has
increased by about 100-150 grams, the filter should be changed.
If the smell or taste of the impurities become detectable the filter
should immediately be changed.
2.1 Shut off the air inlet.
Turn the pre-collector at the
bottom of the drain bowl to
depressurise the filter.
2.2 Loosen the hose between
the regulator and filter lid by
pushing the red sleeve on the
coupling and disconnect the
hose from the lid.
2.3 Unscrew the knobs of the
filter housing and remove the
lid.

Filter change
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2.4 Remove the used filter
element.
Clean and wipe if necessary.
2.5 Check the seals and
change if they are damaged.
2.6 Mount the new filter
element. This has identical
ends and can be fitted either
way round.

Filter change
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2.7 Refit the cover.
2.8 Connect the hose
between the control valve and
filter lid by pushing the hose
into the connector.
2.9 Check that the pads on
the cover and end caps fit
into their grooves.
2.10 Tighten the knobs
alternately by hand until the
lid meets the filter housing.

3. Change the pre-collector element
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3.1 Shut off the air inlet.
Turn the pre-collector at the
bottom of the drain bowl to
depressurise the filter.
3.2 Remove the drain bowl.
Press it downward and twist
anti-clockwise (bayonet
mounting). Wash the bowl in
hot water (not solvent) at a
maximum of 60 °C.
3.3 Remove the pre-collector
element by turning it anti-
clockwise.
3.4 Blow the parts clean with
compressed air. Check that
the drain outlet is not
obstructed.
Refit the filter element and the
drain bowl.

4. Cleaning
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Clean the outside of the filter as necessary, using soapy water and a
sponge or brush. The filter can also be blown clean with the
compressed air or flushed with water. A good time to clean the filter
regulator and the drain bowl is when the filter insert is replaced.
4.1 Shut of the air inlet.
Turn the pre-collector at the
bottom of the drain bowl to
depressurise the filter.
4.2 Remove the drain bowl.
Press it downward and twist
anti-clockwise (bayonet
mounting). Wash the bowl in
hot water (not solvent) at a
maximum of 60 °C.
4.3 Blow the parts clean with
compressed air. Check that
the drain outlet is not
obstructed.
Refit the filter element and
the drain bowl.