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I agree.

Trane parts has them.

You are correct speed change will not occur until the reference is above the minimum Freq. In this case as stated by someone, your minimum is 20 Hz or 33.3 %. Be careful with the minimum reference....

Sound like you need a professional to make recommendations.

Regards.

Nothing wrong with multiple motors on a drive. Here is the criteria: [1] Total amps of motors must not exceed the drive rating. [2] HP of all must be equal.[3] Each motor must have its own OL relay....

Actually, my earlier post is the recommended procedure to have some redundancy. The movement of the entire aux assembly can sometimes be an issue and this takes care of that.

Your "I" problem is most likey caused by a defective aux contact on the run contactor. The transition contacts are gold plated and can eventually fail. Take a standard relay and wire the coil in...

Dumb question. Did you check the 1st stage tang operator assembly?
It can give simular symtoms and is a lot less work.

Regards.

They do not like to sell the boards by itself. Try installing a standard contactor if the busses will allow and eliminate the constant 120 vac wire. Also make sure the Xformer will handle the...

2nd.....say what????

Trane.com

err, crane, maybe?

Here goes,4 contactors, Shorting, Start, run and transition.
1. Shorting contactor pulls in forming center of Wye.
2. Start contactor pulls in starting motor in Wye.
3. Transition
Old way. ...

Hmmm, Face and bypass maybe?

Well, now I have an excuse not to work hard anymore. LOL

Just saw your signature. I'm a liberal, I work hard, happy most days. Does that mean you only work hard to annoy others? LOL

You obviously don't read well. I ask a general question.
By the way which benefits are you willing to give up and pay for your self?

Heres my 2 cents.
I am proud to be union. With that said, everyone must decide what is best for them and theirs. I take offense to my union brothers using degrading words like"scab, rats etc." Most...

Look on the bright side of the Bards. If the entire plant is down, atleast you'll be cool.

enjoy.

See your friendly local Trane parts Dept.

Nitrogen! Never.
You must use a recovery machine.

Hey max, what are you smoking, or did you just miss a key?
LOL

Ouch!

Err, I think that is highly unlikly that all five reliefs would go at the same time. I could see one maybe. The chiller should have shut down on high head before that occurs. Then again, anything is...

What about transition?