I have a chance to buy several amana ptac units (ptc074D series) they are rated at 265 vac I only have 220vac. Will they work at 220vac? Is there a conversion kit needed?

Question edited for a lot more clarity.

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Probably this one. Talk to your installer.

https://www.amana-ptac.com/products/ptac/hec154j

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Question edited for clarity and toss in some CAPS.

You can get wired or wireless.

https://www.amana-ptac.com/products/ptac

Fitting

https://www.google.com/search?q=amana+ptac+connect+to+wall+thermostat

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Maybe something here will help you....

https://ptac4less.com/blog/troubleshoot-reset-amana-ptac/

switch on unit bad or wire burned off terminal

Try 1st link for Support Request, 2nd link enter zip code
http://shop.panasonic.com/hvac/how-to-buy/distributor-locator.dot
http://shop.panasonic.com/hvac/how-to-buy/distributor-locator.dot

You'd need to supply a "Buck-Boost" transformer to do this properly. Technically, the 265 VAC is one hot leg and neutral of a 480 VAC 3 Phase Y system that measures 277 VAC. The 265 number comes from this:

265 is the standard nameplate voltage for a 277 volt motor or AC unit.

230 is standard name plate for 240.
200 is standard name plate for 208
460 is standard name plate for 480.
110 is standard name plate for 120.

Most electricians call the hot leg / neutral circuit "277V AC".

Some popular "Buck-Boost" transformers will convert 208 to 240 and 240 to 208 volt systems, and 240 to 277 and 277 to 240 volt systems - among many other variations. These are auto-transformers as the primary secondary windings share a connection. KVA ratings differ significantly from name plate because of this fact. You should contact a qualified electrician to not only size, but wire the transformer for you. Failure to install a Buck-Boost transformer - and running this unit on 240V AC mains will cause premature failure of motors - fans and compressor due to overheating. This can also result in a fire hazard.

I hope this helps and good luck!

You can actually google PTAC units or window a/c units and a whole bunch of stuff will come up.Some of the things that will appear are foroms where people give their own opinions/reviews of the one they purchased and have used for a couple of months or so.Some people will say don't ever buy this,etc. etc.They also have a rating system that averages out everyone's ratings.

Need to know if the ac volts is a typo, as there is 240 volt 220 volt 50 hz. and 60 hz? U.S. or another country?

The Amana parts line # is 1-800-227-2919, you can also obtain parts numbers and names from their website, www.amana-ptac.com.
Please rate this answer and let me know if this helps.