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Eastwood Technical Assistance: 800.343.9353 >> [email protected]
THERMAL OVERLOAD PROTECTION
As long as the air output capacity, 31.8 SCFM @ 90 PSI [900 l/min. @ 6.2 bar], of the Eastwood Elite QST-80/120 Scroll Compressor is not exceeded, it is ca-
pable of running continuous, automatically controlled on/off cycles. If the air output is exceeded, the Compressor will run continuously in efforts to meet demand.
If this occurs, the Motor and or Scroll will overheat. When the Compressed Air Outlet Temperature Sensor detects 203°F [95°C] the Thermal Overload alarm will
activate (audible warning buzzer and LCD Screen Warning display) however, the Motor will continue to run for a short period. At this point, all work demands of
the Compressor should be stopped immediately and the unit should be allowed to continue to run without a load until it cools. This will automatically cancel the
Thermal Overload LCD Screen Warning, however, the audible warning buzzer alarm must be reset by pressing the Button
(FIG 9)
.
If the Thermal Overload warning in not heeded, the Motor will shut off when the Compressed Air Outlet Temperature Sensor detects 212°F [100°C]. The cooling
fan will continue to run. The motor will not start until it has cooled sufficiently.
OIL TEMPERATURE ALARM
In addition to the Motor and Scroll overheating protection, the Oil Over Temperature sensor constantly monitors the Scroll oil temperature. If the oil temperature
becomes excessive, the Oil Over Temperature alarm will activate (audible warning buzzer and LCD Screen Warning display) however, the Motor will continue to
run for a short period. At this point, all work demands of the Compressor should be stopped immediately and the Compressor housing should be checked for
blockage of cooling air side vent panels, or blockage of the Fan Air Outlet on top.
The Fan should be allowed to continue to run until the oil sufficiently cools. This will automatically cancel the Oil Over Temperature LCD Screen Warning however,
the audible warning buzzer alarm must be reset by pressing the Button
(FIG 9)
.
If the Oil Over Temperature warning is not heeded, the Motor will shut off and will will not start until the oil has cooled sufficiently.
LOW OIL LEVEL ALARM
In addition to the Motor and Scroll overheating protection, the Oil Level sensor constantly monitors the Scroll oil level. If the oil level becomes too low, the
Low Oil Level alarm will activate (audible warning buzzer and LCD Screen Warning display) and the Motor will stop running.
The oil level must be checked and filled with the necessary amount of Eastwood Scroll Compressor Oil and the alarm must be reset by pressing the
Button
(FIG 9)
.
The Scroll, Oil/Moisture Tank, and all lines should be checked for leaks to determine the reason for the low oil condition before resuming use.
PRESSURE RELIEF VALVE
The Pressure Relief Valve
(FIG 31)
is factory set to release at 160 PSI
[11 bar].
DO NOT
attempt to adjust or tamper with it. Doing so can cause
an unsafe condition resulting in violent bursting of lines, tank or other
components.
If the Pressure Relief Valve should suddenly release, this indicates that a
dangerous condition exists! Stop all work immediately and quickly depress
the large
“STOP”
Button located on the Control Panel.
DO NOT
resume
Compressor use until a cause for the pressure release has been found.
S
S
S
FIG. 31
Pressure Relief Valve
✓
