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OPERATING INSTRUCTIONS – GENERAL
21
SSR UP6 40, SSR UP6 50PE, SSR UP6 50PEI, HF50–PE,
EP50–PE, HP50–PE, HXP50–PE
GENERAL OPERATION
The compressor is an electric motor driven, single stage screw
compressor, complete with accessories piped, wired and baseplate
mounted. It is a totally self contained air compressor package.
The 40hp compressor packages are designed to operate in an
ambient range of 35.6_F – 104_F (2_C to 40_C) with a special
option package available to operate in ambient temperatures ranges
from 35.6_F up to 124_F (2_C up to 50_C). The maximum
temperature is applicable to either version up to a maximum
elevation of 3280ft (1000m) above sea level. Above this altitude
significant reduction in maximum allowable ambient temperature is
required.
The 50 hp package is designed for a 115_F (46_C) maximum
ambient.
Compression in the screw type air compressor is created by the
meshing of two (male & female) helical rotors.
The air/coolant mixture discharges from the compressor into the
separation system. This system removes all but a few PPM of the
coolant from the discharge air. The coolant is returned to the cooling
system and the air passes through the aftercooler and out of the
compressor.
Cooling air is moved through the coolers by the cooling fan and
discharged from the machine.
CAUTION
Cooling air is drawn in at the end of the machine package
passing through the filter and cooler before being discharged
from the top of the machine. Care should be taken to avoid
blocking the airflow, or causing any restriction in excess of the
maximum backpressure allowed for ducting.
Do not direct the airflow at face or eyes.
The power transmission from the drive motor to the airend male
rotor is by pulley and belts. The constant auto tensioning system, using
airend mass torque and gas arm, ensures that the belts are always
under the correct tension, eliminating the need for adjustment and
maximizing the life of the belts.
By cooling the discharge air, much of the water vapour naturally
contained in the air is condensed and may be drained from the
downstream piping and equipment.
The coolant system consists of a sump, cooler, thermostatic valve
and a filter. When the unit is operating, the coolant is pressurized and
forced to the compressor bearings.
The compressor load control system is automatic on–off line. The
compressor will operate to maintain a set discharge line pressure and
is provided with an auto restart system for use in plants where the air
demand varies sufficiently to allow a compressor to shut down and
save power. Significant system volume will assist this and is
recommended.
With the dryer option, the dryer will run continuously when the
compressor is automatically off line.
WARNING
When the unit stops running as the result of low air demand,
normally indicated by auto restart light, it may restart and return
to load at any time.
Safety of operation is provided as the compressor will shut down if
excessive temperatures or electrical overload conditions should occur.
CAUTION
This unit is not designed or intended to operate when
contaminated with silicone. Lubricants, greases or other items
containing silicone should not be used on this unit.
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