Question about Electronics - Others
I am trying to replace the start and run capacitors for a grain bin fan. The old parts were taken out and wires removed before I became involved so I don't know how to connect the new parts. The wiring diagram which was in the unit is very old & worn- I've tried to make a photo copy and mark in the info which was worn off. I believe the appropriate diagram is the one in the center.
There are two start capacitors which are 216-259 microfarads. (They are the black cyclindrical looking items in the photo). The run capacitors are 20 micro farads. (They are the oblong silver colored items in the photo.)
I don’t understand physically how these are connected. I tried several scenarios and the motor just hums.
Please help. (If the photos didn't get attached because they are too large, please give me an e-mail address where I can send them. Thanks so much
SOURCE: Wiring compressor
The two terminal cap is only for the new fan motor. Connect the compressor wire back where you found it, on the 3 terminal cap. It's the terminal marked, "herm". The "common" terminal on the 3 terminal cap must still be connected to one side of the 220 power at the contactor. One side of the 220 goes to the common on the compressor. The other side of the 220 goes to the run winding on the compressor AND the common terminal on the 3 terminal capacitor.
Posted on Jul 22, 2008
Posted on Aug 28, 2008
Hi again, OK, Well since I don't have a wiring diagram and the colors don't help. I am also going to assume it is 110VAC. The larger wires are probably the run or primary, it you remember which ones were connected it will help with polarizing. ( getting it to run in the right direction as well as the start and primary working together). You can use the two terminal switch but you should use a three wire cord. Use the switch to break the neutral and ground the case. The connections should be as follows: Connection 1, would have one of the primaries and one of the starts to neutral. Connection 2, the other start to the relay. Connection 3, the coil side of the relay to the remaining primary. ( if the relay has two connections on one end and one on the other it would be the single) Connection 4, the 3rd position on the relay to hot. That is how a split phase is wired. You may find a simple wiring diagram on the net if you type split phase motor wiring diagram. Good Luck to you, this should Fixya!
Posted on Mar 04, 2009
SOURCE: pool motor wiring
First and foremost, you need to check the Motor's voltage requirements, and match it to the voltage of the GFI you have connected to the House current.
The best way to do this is to use a volt meter at the GFI receptacle. Although it's likely the voltage at your GFI receptacle is 120Volts AC, you shouldn't guess on this. If you know what circuit breaker this GFI is using to get power.... you may be able to determine the GFI's voltage if you know how to distinquish between a single pole breaker and a two pole breaker (120Volts is derived from a sigle pole breaker, 240volts from a two pole breaker-which is twice the size of a single pole breaker).
Now the Motor: Most common Pool Motors are dual winding motors, on which, the voltage requirement could be changed to match the voltage supplied. On such a motor, there's a compartment where the cord is attached. Within this compartment, there's a configuration of screws or terminal points, and a related schematic which depicts the proper connections for each of the voltage options. By following these schematics, you will know how to connect the motor based on the available voltage supplied by your GFI protected receptacle.
Posted on Mar 23, 2009
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