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vibrating excessively. Use metal shims under
the "short" feet if necessary.
5. A rubber isolation mat or pads may be used
under each mounting foot to reduce vibration.
Step 5. Installing Distribution Piping
The stationary compressor can utilize the same type of
properly rated, single flexible hose, as is used on
portable air compressors. However, many purchasers
will prefer to utilize the stationary unit through a
permanently installed distribution system serving several
points within a facility. The design, installation and
usage of stationary compressed air distribution systems
has been the subject of extensive industrial, trade and
government attention, as can be seen within many
private and government websites.
An example of the typical components used in a
permanent distribution system are shown in Figure 8.
It should be obvious that there is considerable
complexity in designing and installing such a system.
Controlling the pressures, moisture in the air, drying
components, contaminants, lubrication, as well as
choosing and sizing the piping for the system, requires
the expertise of persons or firms familiar with such
designs and their installation.
A very significant safety issue arises when one is
distributing line pressure air throughout a facility, which
is over 150 PSI. Standard components, steel pipe
fittings and many plastic compressed air piping systems
are only rated to 150 PSI and cannot be safely used in
such distribution systems. In such cases, immediately
Figure 8
regulating the distribution line pressure at the
compressor outlet to under 150 PSI (usually in the 90-
120 PSI range) is mandatory for many compressed air
piping systems.
NorthStar recommends that you contact plumbers or
mechanical contractors with expertise in compressed air
systems to plan and/or install your distribution system.
WARNING: Bursting hazard
This unit can produce pressures in excess of 150 PSI,
which is beyond the capabilities of many piping types
and pipe fittings. Failure of undersized and/or
inadequate distribution components can lead to serious
injury.
WARNING: Restriction hazard
If an aftercooler, check valve, block valve, or any other
restriction is added to the compressor discharge, install
a properly sized ASME approved pressure safety/relief
valve between the compressor discharge and the
restriction.
Step 6. Wiring Installation
Wiring should be installed by a qualified electrician.
Installations must be in accordance with all applicable
local, state, and federal regulations.
WARNING: Electrical Shock Hazard
Improper electrical grounding can result in a risk of
electric shock. Electrical installation and service of the
230V, single-phase box (30 or 40 amp) MUST be made
by a qualified electrician. If the compressor must be
reinstalled at a different location, the re-connection
should also be made by qualified personnel. The
compressor motor may not start or may burn out
prematurely if adequate amperage is not available.
Electric Compatibility
The motor rating, as shown on the motor nameplate,
and the building power supply must have compatible
voltage, phase and hertz characteristics.
Wire Size
The electrical wiring required between the building's
power supply and the electric motor varies according to
motor horsepower. Power leads must be adequately
sized to protect against excessive voltage drop during
start-up. High voltage drops can cause motor to
overheat and fail. A qualified electrician should provide
information for selecting proper wire size. If other
electrical equipment is connected to the same circuit,
the total electrical load must be considered in selecting
the proper wire size. DO NOT use undersized wire.
12
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