"New" Quincey Compressor doesn't run...

[TazioP3]

All,

I bought a remanufactured compressor last year and finally got around to moving it this week. The thing was rebuilt by a pro, bolted to a new tank and got a new Quincey tank. It ought to work.

I had a service disconnect from my old compressor (30A) and I put a Siemens magnetic starter after that and wired things up like I thought they should be. The closed pressure switch completes the coil circuit and pulls the two pole switch shut so that 120+ volts is available through L1 and L2 to M1 and M2 (T1/T2?).

The four conductors (two big and two small gauge) coming from the side of the 5 HP Baldor L1410T are numbered an the pictogram suggests that the rotation is reversible. I matched the numbers according to the picture and connected each matched pair to a conductor (8ga) originating from M1 and M2. Thus, I believe I have 120V+#1+#5 joined by one blue wiring nut and 120V+#8+#4 joined by the other blue wiring nut.

Everything is grounded.

When the switch is closed, the mag starter snaps it's switches closed and the compressor motor buzzes but does not spin. I do this only momentarily, but in about four attempts, no breakers are tripped. I manually rotated the compressor's flywheel and watched the belts rotate the motor. There seem to be no physical restrictions, so I decided it was a wiring issue. Just for fun, I reversed the rotation (again following the pictogram). I also tried it with the smaller gauge wires disconnected. Killing time, I reversed L1 and L2. I flipped breakers off and on, added more grounds.

The best I can get is the low pitched, subtle, groaning buzz.

Any ideas? I am starting to get frustrated, a little...

Thanks,

Bill

 

[DJDD]

I would have someone come out to check the compressor. You never know with rebuilts.

 

[pcmeiners]

"The closed pressure switch completes the coil circuit and pulls the two pole switch shut so that 120+ volts is available through L1 and L2 to M1 and M2 (T1/T2?). "
Measuring voltage between L1 and L2 do you have approx 0-120v or 240v ? If approx 240, then look in the housing for the capacitor, everything connected ? If 240v and capacitor connected, likely bad cap or the auxillary winding switch is malfunctioning. If 0-120v between L1 and L2, simple fix at breaker panel is needed.

From the pic, your motor wiring appears OK ..

 

[D KRAGER]

Check all the voltage, sounds like it's single phasing.

 

[GeorgiaHybrid]

What is the model number of your Siemens mag starter? Does it require a heater to be installed? I just got thru putting a 5 HP Baldor with a Siemens mag starter on a Quincy compressor. After a lot of help from Charles it is working fine. My only problem after I wired everything up was I had the motor running a normal rotation and mine needed a reverse rotation.

Let us know what you have and we will see if we can get you going. By the way, if the compressor will turn over, it should be fine.