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6. Verify that the compressor is physically fully unloaded. The GEA Omni™ will prevent the compressor from
starting if the slide valve position displayed is greater than 70 %. The
Slide Valve Position
may need to be
temporarily recalibrated to 0 % to allow the machine to start.
7. Start the compressor and wait until the compressor is running and oil pressure has been established.
8. Touch the
UNLOAD
button and wait about 90 seconds for the slide valve to fully unload. Smaller machines
may not require the full 90 seconds to unload.
9. The calibration button on the transducer is positioned between the two LEDs. Push and hold the calibration
button for five seconds, both LEDs should be off.
10. Press the pushbutton one time and release it. The red LED will now turn
On
, and remain
On
, for approxi-
mately 3 seconds while the zero calibration point is stored.
DO NOT
move the slide valve until the red LED
turns off.
11. Touch the
LOAD
button and wait about 90 seconds for the slide valve to fully load. Smaller machines may
not require the full 90 seconds to load.
•
This process must be completed quickly because the indicator will abandon the calibration after a period
of time. Please note the red LED will flash approximately ¼ second every 5 seconds indicating the indi-
cator is active and that the calibration has not been fully completed.
12. Once the compressor is fully loaded, push the calibration button twice, and the red LED will flash rapidly for
approximately 3 seconds. Do not attempt to move slide valve until red LED turns
Off
. When the red LED
stops flashing the loaded position is set.
13. At this time the sensor will have an output of 20 mA. This can be verified on the
Operating Data
screen.
14.
UNLOAD
and
LOAD
the machine to confirm calibration. Refer to the
Compressor Capacity
on the
Operating
Data
screen. It should track the slide valve between 4 mA and 20 mA.
15. Stop the compressor by touching
STOP
.
16. Reinstall the cover.
17. If the transducer was rotated, restore it to the original orientation and tighten the setscrews.
18. Return load/unload needle valves to their original positions to ensure proper slide valve movement.
Sensor Calibration
Instruction Manual | GEA Omni™
Control panel
234
GEA Refrigeration North America, Inc. | E_806550_2 | Generated 12.01.2016
Содержание Omni
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