PSD-QS (02/16)
Page 47
Note:
Feel the top of the compressor to see if it has overheated. If it is hot, the internal
overload may be open. You may have to wait several hours for it to reset before
proceeding.
If the compressor draws a high amperage and does not start (amperage is approximately
locked rotor amperage
– LRA (See Figure 7)), the compressor is locked mechanically
and should be removed from the system and replaced. Verify before removing!
7. Motor Circuit Testing
Using a digital volt-ohmmeter (VOM), measure the resistance across the compressor
windings as shown in Figure 34. The power leads to the compressor must be
disconnected before taking an electrical measurement. A good rule of thumb for single
phase compressors is that start winding resistance (R
2
) is 3 to 5 times greater than run
winding resistance (R
1
).
Figure 34. Compressor Motor Circuit Testing
8. Grounded Windings
Summary of Contents for Prime-025
Page 15: ...PSD QS 02 16 Page 15 Figure 8 PSD Compressor Unit Electrical Schematic 230 1 60...
Page 16: ...PSD QS 02 16 Page 16 Figure 9 PSD Compressor Unit Electrical Schematic 230 3 60...
Page 17: ...PSD QS 02 16 Page 17 Figure 10 PSD Air Heating Cooling Water Heating Application...
Page 18: ...PSD QS 02 16 Page 18 Figure 11 PSD Air Heating CoolingWater Heating Field Wiring Diagram...
Page 20: ...PSD QS 02 16 Page 20 Figure 11a SureStart Mode of Operation...
Page 27: ...PSD QS 02 16 Page 27 Figure 15 Disassembled Plug Connector...
Page 34: ...PSD QS 02 16 Page 34 Figure 24 PSD Internal Flow Schematic...
Page 35: ...PSD QS 02 16 Page 35 Figure 25 PSD Piping...
Page 37: ...PSD QS 02 16 Page 37 Figure 26 Evacuation of PSD System...
Page 39: ...PSD QS 02 16 Page 39 Figure 27 Initial Charge of PSD System...
Page 41: ...PSD QS 02 16 Page 41 Figure 28 Final Charge of PSD System...
Page 44: ...PSD QS 02 16 Page 44 Figure 32 Start Up Process...
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