It is simple to get the right compressor,
order one from an American Standard dealer by giving them the model and serial number. Then they will look in the parts list for the right compressor. Ratings and operation are for a specific compressor tested in the factory.
It’s a LOT wiser to do it that way than to get a guesstimation of whatever a supply house has in stock.
http://www.heatpro.us energy businessmen’s knowledge
Yes, you really have to find out the MAKE and MODEL to get good answers. There IS more than one machine made.