two-stage copeland scroll compressors. design air university external view 1 st stage = 67% 2 nd...
DESCRIPTION
DESIGN AIR UNIVERSITY Customer Experience Majority of run 67% Majority of run 67% Delivers steady state cooling. Delivers steady state cooling. Eliminates temperature peaks & valleys from compressor cycling. Eliminates temperature peaks & valleys from compressor cycling. Better humidity control. Better humidity control. Majority of run 67% Majority of run 67% Delivers steady state cooling. Delivers steady state cooling. Eliminates temperature peaks & valleys from compressor cycling. Eliminates temperature peaks & valleys from compressor cycling. Better humidity control. Better humidity control.TRANSCRIPT
![Page 1: Two-Stage Copeland Scroll Compressors. DESIGN AIR UNIVERSITY External view 1 st stage = 67% 2 nd stage = 100% Used in 17 SEER AC](https://reader033.vdocuments.site/reader033/viewer/2022050807/5a4d1b8b7f8b9ab0599beff1/html5/thumbnails/1.jpg)
Two-Stage Copeland Scroll Compressors
![Page 2: Two-Stage Copeland Scroll Compressors. DESIGN AIR UNIVERSITY External view 1 st stage = 67% 2 nd stage = 100% Used in 17 SEER AC](https://reader033.vdocuments.site/reader033/viewer/2022050807/5a4d1b8b7f8b9ab0599beff1/html5/thumbnails/2.jpg)
DESIGN AIR UNIVERSITY
External view• 1st stage = 67%• 2nd stage = 100%• Used in 17 SEER
AC.
![Page 3: Two-Stage Copeland Scroll Compressors. DESIGN AIR UNIVERSITY External view 1 st stage = 67% 2 nd stage = 100% Used in 17 SEER AC](https://reader033.vdocuments.site/reader033/viewer/2022050807/5a4d1b8b7f8b9ab0599beff1/html5/thumbnails/3.jpg)
DESIGN AIR UNIVERSITY
Customer Experience• Majority of run hours @ 67%• Delivers steady state cooling.• Eliminates temperature peaks
& valleys from compressor cycling.
• Better humidity control.
![Page 4: Two-Stage Copeland Scroll Compressors. DESIGN AIR UNIVERSITY External view 1 st stage = 67% 2 nd stage = 100% Used in 17 SEER AC](https://reader033.vdocuments.site/reader033/viewer/2022050807/5a4d1b8b7f8b9ab0599beff1/html5/thumbnails/4.jpg)
DESIGN AIR UNIVERSITY
How does it work?• Solenoid opens or closes a
port on the internal scrolls.• Valve is actually a ring that
rotates.• Ring opens or closes the
bypass port.
![Page 5: Two-Stage Copeland Scroll Compressors. DESIGN AIR UNIVERSITY External view 1 st stage = 67% 2 nd stage = 100% Used in 17 SEER AC](https://reader033.vdocuments.site/reader033/viewer/2022050807/5a4d1b8b7f8b9ab0599beff1/html5/thumbnails/5.jpg)
DESIGN AIR UNIVERSITY
Internal assembly
![Page 6: Two-Stage Copeland Scroll Compressors. DESIGN AIR UNIVERSITY External view 1 st stage = 67% 2 nd stage = 100% Used in 17 SEER AC](https://reader033.vdocuments.site/reader033/viewer/2022050807/5a4d1b8b7f8b9ab0599beff1/html5/thumbnails/6.jpg)
DESIGN AIR UNIVERSITY
1st Stage Position• Solenoid is NOT energized.• Port is OPEN.• Only 2/3 of scroll compresses
refrigerant.• The other 1/3 is bypassed thru
the open port.
![Page 7: Two-Stage Copeland Scroll Compressors. DESIGN AIR UNIVERSITY External view 1 st stage = 67% 2 nd stage = 100% Used in 17 SEER AC](https://reader033.vdocuments.site/reader033/viewer/2022050807/5a4d1b8b7f8b9ab0599beff1/html5/thumbnails/7.jpg)
DESIGN AIR UNIVERSITY
Solenoid: “unpowered”
![Page 8: Two-Stage Copeland Scroll Compressors. DESIGN AIR UNIVERSITY External view 1 st stage = 67% 2 nd stage = 100% Used in 17 SEER AC](https://reader033.vdocuments.site/reader033/viewer/2022050807/5a4d1b8b7f8b9ab0599beff1/html5/thumbnails/8.jpg)
DESIGN AIR UNIVERSITY
Port open
![Page 9: Two-Stage Copeland Scroll Compressors. DESIGN AIR UNIVERSITY External view 1 st stage = 67% 2 nd stage = 100% Used in 17 SEER AC](https://reader033.vdocuments.site/reader033/viewer/2022050807/5a4d1b8b7f8b9ab0599beff1/html5/thumbnails/9.jpg)
DESIGN AIR UNIVERSITY
Port open
![Page 10: Two-Stage Copeland Scroll Compressors. DESIGN AIR UNIVERSITY External view 1 st stage = 67% 2 nd stage = 100% Used in 17 SEER AC](https://reader033.vdocuments.site/reader033/viewer/2022050807/5a4d1b8b7f8b9ab0599beff1/html5/thumbnails/10.jpg)
DESIGN AIR UNIVERSITY
2nd Stage Position• Solenoid is energized w 24 volts dc.
• Ring rotates & closes the port.
• The entire scroll capacity is delivered.
![Page 11: Two-Stage Copeland Scroll Compressors. DESIGN AIR UNIVERSITY External view 1 st stage = 67% 2 nd stage = 100% Used in 17 SEER AC](https://reader033.vdocuments.site/reader033/viewer/2022050807/5a4d1b8b7f8b9ab0599beff1/html5/thumbnails/11.jpg)
DESIGN AIR UNIVERSITY
Scroll internals• Solenoid operates on DC voltage.• Initial inrush is 18 to 28 volts DC.• Holding voltage is less.
![Page 12: Two-Stage Copeland Scroll Compressors. DESIGN AIR UNIVERSITY External view 1 st stage = 67% 2 nd stage = 100% Used in 17 SEER AC](https://reader033.vdocuments.site/reader033/viewer/2022050807/5a4d1b8b7f8b9ab0599beff1/html5/thumbnails/12.jpg)
DESIGN AIR UNIVERSITY
Solenoid: “powered”
![Page 13: Two-Stage Copeland Scroll Compressors. DESIGN AIR UNIVERSITY External view 1 st stage = 67% 2 nd stage = 100% Used in 17 SEER AC](https://reader033.vdocuments.site/reader033/viewer/2022050807/5a4d1b8b7f8b9ab0599beff1/html5/thumbnails/13.jpg)
DESIGN AIR UNIVERSITY
Port closed
![Page 14: Two-Stage Copeland Scroll Compressors. DESIGN AIR UNIVERSITY External view 1 st stage = 67% 2 nd stage = 100% Used in 17 SEER AC](https://reader033.vdocuments.site/reader033/viewer/2022050807/5a4d1b8b7f8b9ab0599beff1/html5/thumbnails/14.jpg)
DESIGN AIR UNIVERSITY
Port closed
![Page 15: Two-Stage Copeland Scroll Compressors. DESIGN AIR UNIVERSITY External view 1 st stage = 67% 2 nd stage = 100% Used in 17 SEER AC](https://reader033.vdocuments.site/reader033/viewer/2022050807/5a4d1b8b7f8b9ab0599beff1/html5/thumbnails/15.jpg)
DESIGN AIR UNIVERSITY
Staging Control Wiring• Separate wiring to terminal
block on compressor shell.
• Connects integrated compressor control to internal solenoid.
![Page 16: Two-Stage Copeland Scroll Compressors. DESIGN AIR UNIVERSITY External view 1 st stage = 67% 2 nd stage = 100% Used in 17 SEER AC](https://reader033.vdocuments.site/reader033/viewer/2022050807/5a4d1b8b7f8b9ab0599beff1/html5/thumbnails/16.jpg)
DESIGN AIR UNIVERSITY
Checking Solenoid
Use your ohmmeter.
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DESIGN AIR UNIVERSITY
Solenoid Molex Plug
![Page 18: Two-Stage Copeland Scroll Compressors. DESIGN AIR UNIVERSITY External view 1 st stage = 67% 2 nd stage = 100% Used in 17 SEER AC](https://reader033.vdocuments.site/reader033/viewer/2022050807/5a4d1b8b7f8b9ab0599beff1/html5/thumbnails/18.jpg)
DESIGN AIR UNIVERSITY
Molex unplugged
![Page 19: Two-Stage Copeland Scroll Compressors. DESIGN AIR UNIVERSITY External view 1 st stage = 67% 2 nd stage = 100% Used in 17 SEER AC](https://reader033.vdocuments.site/reader033/viewer/2022050807/5a4d1b8b7f8b9ab0599beff1/html5/thumbnails/19.jpg)
DESIGN AIR UNIVERSITY
Placement of probes
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DESIGN AIR UNIVERSITY
“Good” Ohm reading
32 to 60 ohms.
![Page 21: Two-Stage Copeland Scroll Compressors. DESIGN AIR UNIVERSITY External view 1 st stage = 67% 2 nd stage = 100% Used in 17 SEER AC](https://reader033.vdocuments.site/reader033/viewer/2022050807/5a4d1b8b7f8b9ab0599beff1/html5/thumbnails/21.jpg)
DESIGN AIR UNIVERSITY
Ohm check on Molex plug
• If resistance is infinite, the solenoid is electrically “open”.
• Compressor never operates on 2nd stage.
• The fix? Replace the compressor.
![Page 22: Two-Stage Copeland Scroll Compressors. DESIGN AIR UNIVERSITY External view 1 st stage = 67% 2 nd stage = 100% Used in 17 SEER AC](https://reader033.vdocuments.site/reader033/viewer/2022050807/5a4d1b8b7f8b9ab0599beff1/html5/thumbnails/22.jpg)