Stationary Air Compressor System Operating Instructions
3 - Starting and Operating
28
Charging the Storage System
The compressor may be equipped with either ASME
or DOT air storage cylinders, which are available from
SCOTT in a number of congurations. Regardless of the
storage conguration, SCOTT storage cylinders MUST
be installed by a SCOTT trained and certied service
technician and inspected periodically prior to use.
IMPORTANT
Establish and maintain an inspection procedure
for cylinders. Routine inspection of the equipment
is the responsibility of the organization using
the equipment, and must be in accordance with
technical and service guidelines provided by SCOTT
Safety.
Charging Storage Cylinders
1. If the storage cylinders have been visually inspected,
and are found to be in good operating condition,
allow the compressor to charge to the maximum
system pressure. Compressed air will automatically
be directed to the storage cylinders.
2. Monitor the storage pressure gauges.
Bulk volume: the storage gauge is located on the
main control panel.
Cascade volume: individual storage gauges are
identied on the Cascade Control Panel.
The time required for charging the air storage system
will depend on the number and pressure rating of the
storage cylinders. If cylinder pressure does not build
properly, contact a SCOTT certied service technician
to troubleshoot the system.
Cascade Volume Operation
The Cascade Control Panel includes individual gauges
and control valves for monitoring and controlling the ow
of compressed air in each cylinder. Each cylinder may
be isolated, or “shut off” to prevent compressed air from
entering or exiting the cylinder.
To isolate a cascaded cylinder, simply turn the control
valve clockwise to shut off the air ow. Turn the valve
counterclockwise to allow the compressed air to ow as
normal.
Inspect the storage cylinders and verify the latest
inspection date. Storage cylinder inspection should be
performed on a routine basis, as determined by specic
organization requirements.
DOT cylinders must be visually inspected and
hydrostatically tested by a licensed cylinder re-tester
in accordance with the appropriate US Department
of Transportation (DOT) specification or applicable
DOT exemption, or in accordance with the appropriate
Transport Canada (TC) Permit of Equivalent Level of
Safety. Depending on when the DOT storage cylinders
were purchased, this may be ve (5) or ten (10) years.
Cylinders that must be tested every ve (5) years are
stamped with the DOT and TC numbers around the top
of the cylinder. Cylinders that must be tested every ten
(10) years are stamped with the number ISO9809-02
around the top of the cylinder. Verify the required re-test
schedule for your DOT storage cylinders and establish
a procedure for haveing the cylinders re-tested to that
schedule.
The date of manufacture marked on the cylinder is also
the date of the rst hydrostatic test. Subsequent test
dates are indicated by labels afxed to the cylinder.
If the required hydrostatic test date has expired for
the DOT cylinder, DO NOT USE the cylinder. Notify a
supervisor or other certied personnel responsible for
cylinder inspection.
Storage Cylinder Inspection
Do not rell any cylinder that is damaged or not within
the prescribed hydrostatic test date as determined
by the appropriate US Department of Transportation
(DOT) specication or the applicable DOT exemption
or in accordance with the appropriate Transport
Canada (TC) Permit of Equivalent Level of Safety.
Damaged cylinders may suddenly leak or rupture if
charged with compressed air. Failure to inspect for
damage and to empty the air from damaged cylinders
may result in personal injury or death.
ASME cylinders do not require hydrostatic testing, but
include a drain valve and gauge. If installed, safety valves
on ASME cylinders must be tested on an annual basis.
ASME safety valves can by identied by a tag or label
showing traceability to the National Bureau of Standards
(NB) and a tamper evident seal. Some SCOTT storage
systems with ASME storage cylinders are protected by
single use rupture disks that cannot be tested.
Refer to specic ASME or DOT safety standards for
additional testing information.
Operating the Compressor Continued...