Powerex SBS Series Instructions Manual

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Description
General
The Powerex Oil-less Rotary Scroll Air Compressor has advanced scroll
compressor technology through the development of a completely
oil-less unit. The Powerex Scroll Compressor offers a dynamically
balanced air end which insures vibration-free operation. The rotary
design permits a continuous 100% duty cycle. No oil separation, oil
filtration, or inlet valves are required on the Powerex Scroll unit.
Base mount assemblies are intended for use as replacements on
original Powerex Scroll systems and are not suitable for use as is
to provide compressed air for most applications. In general, an air
receiver and appropriate piping and valves, along with electrical
controls (base mounts may be provided with controls by Powerex)
are needed to provide a functional system. Powerex tank mounted
units, simplex or duplex are complete and ready to use.
The base mount assemblies include the scroll pumps, with provision
for intake filters to be mounted on the pump. The scroll pump is belt
driven using a 2 pole three phase electric motor. The electric motor
is mounted on a slide base to facilitate adjusting belt tension. The
belt drive is covered by a sheet metal belt guard. The pump delivers
compressed air into the after cooler that uses the air from the pump
blower fan to bring the compressed air temperature near ambient.
A check valve is installed in Powerex Scroll systems after the after
cooler. Compressed air is routed to the receiver tank. A pressure relief
valve is installed on systems where there is a possibility of accidentally
closing a shut off valve between the compressor and air receiver.
Controls on Simplex systems respond to pressure demand and
engage the electric motor when pressure in the receiver tank drops
to the cut in setting. (Approximately 95 psig) The motor runs and the
pump delivers air until the cut off point is reached (Approximately
115 psig). On Duplex systems, the controls alternate which pump runs
to respond to the air demand. If air demand exceeds the ability of
one pump, the second, or lag, pump is engaged at the lag switch cut
in point. It runs until the lag switch cut off is achieved, while the lead
pump continues to run until the lead switch cut off is achieved.
The after cooler on Powerex Scroll systems is mounted on resilient
mounts to prevent damage to the cooler. Piping is designed to
accommodate temperature and vibration encountered in normal use.
Powerex Scroll systems can be provided with separately powered
electric timer controlled automatic tank drains to expel condensation
that accumulates in the compressor tank. Make sure the tank drain is
working properly by operating the manual drain regularly to check for
Powerex • 150 Production Drive • Harrison, OH 45030 • USA
P 1.888.769.7979 • F 513.367.3125 • www.powerexinc.com
7.5 & 10 HP Basemount & Tankmount Scroll Air Compressors
accumulated condensation. Optional tank lining can be provided to
assure minimal corrosion of the tank interior. Dispose of condensate
as required by applicable regulations.
Powerex Scroll systems can also be provided with dryers. Dryers must
be provided with electrical power from a separate source and cannot
be powered from the control system, as the controls are not designed
for this load. Dryers will also expel water and the condensate must be
disposed of according to applicable regulations.
SPECIFICATIONS
Product
Performance Specifications
California Ordinance 462
(L) (2)
Compression Cycle
Control Panel
Drive
Lubrication
Motor Overhead Protection
Operating Temperature
Operating Voltages
Outlet Air Connections
Overpressure Protection
Standard Pressure Settings
SBS, STS, and STD series
See Product Data Sheet
Tank Mount units meet the requirements
of this ordinance
Scroll
UL508A Listed (panels are optional)
2-3V Belts
Grease filled bearings
IEC Motor overload relay (optional)
34°F - 104°F (1°C - 40°C) at inlet
1Ø 208-230 Volts, 60 Hz
3Ø 208-230/460 Volts, 60 Hz
Model specific - see detail drawings
ASME safety valve factory set and sealed
Simplex: 95-115 psi
Duplex: 90-110 psi; 95-115 psi
IN594102AV • 03/2017
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