Ingersoll-Rand EP 20-ESP, Руководство оператора/инструкция по эксплуатации и перечень запасных частей

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COOLANT/AIR SEPARATION SYSTEM
The coolant/air separation system is composed of a
tube separator with specially designed internals and a
two stage, coalescing type separator element located
in a housing above the inlet control valve on the
airend.
The air-coolant mixture discharges from the airend into
the tube separator. The majority of coolant is separated
while in the tube separator and the coalescing separa-
tor filter element is used for final polishing of the air
prior to the customer’s system. The system removes
nearly all of the coolant from the discharge air. The
separated coolant is returned to the coolant system
and the air passes to the compressed air system.
3.3 AIR SYSTEM
COMPONENTS AND FLOW
The air system is composed of:
Inlet air filter
Inlet control valve (lCV)
Airend
Coolant/Air separator
Minimum pressure valve (MPV)
Non-return check valve (NRV)
Aftercooler
The direction of flow is from the inlet filter to the after-
cooler.
FUNCTIONS OF COMPONENTS
Inlet air filter, filters the incoming air, trapping 99% of
particles 10 micron and larger.
Inlet valve opens full for on-line operation.
The valve closes in the off-line mode and at shutdown
which prevents back flow of the compressed air.
The airend compresses the air.
The tube separator removes most of the coolant from
the air.
The separator element performs the final separation of
coolant and polishing of the air prior to leaving the
compressor.
The minimum pressure check valve keeps the tube
separator and separator element at a minimum pres-
sure to ensure adequate oil flow and proper coolant/air
separation.
The non-return check valve prevents line pressure from
exhausting back through the airend at shutdown and
during periods of unloaded operation.
The aftercooler cools the air prior to leaving the pack-
age.
3.4 CAPACITY CONTROL
ON LINE/OFF LINE WITH AUTOMATIC START/STOP
CONTROL
The compressor will deliver air at full capacity, (the
compressor maximum efficiency condition) or will oper-
ate at zero capacity with high receiver pressure (the
compressor minimum power condition), while the unit
continues to run.
When the compressor starts and line pressure is below
the lower setting of the line pressure switch, control
solenoid 1SV will be energized (close), inlet control
valve ICV will open, and the compressor will load.
When the line pressure reaches the upper setting of
the pressure switch, the compressor will unload by de-
energizing (opening) 1SV and closing ICV. Solenoid
1SV relieves the internal pressure of the compressor
back to the inlet filter. The only adjustment required is
setting of the pressure switch.
When the compressor unloads, a time delay relay is
energized and begins to time out. The timer, mounted
in the control box, is factory set at 10 minutes. It will
continue to operate for as long as its time setting, after
which a relay contact opens to de-energize the com-
pressor starter coil. At the same time, an amber light
(1LT) on the control box is lit to indicate the compres-
sor has shut down automatically and will restart auto-
matically. The automatic restart will take place when
the line pressure drops to the lower setting of the pres-
sure switch.
Adjusting the adjustable timer below the 10 minute
factory setting may shorten the life of the com-
pressor drive motor.