Come on...I thouht this was going to be a challenge
you can use your dryer plug as a TEST only...24000 is alot for only 15 amp....even my 18000 used a double 20amp circuit breaker....and my 30,000 unit uses a double 30 amp...just like my electric dryer
I have several dryer plug to A/C type outlet setups, saves time for testing, all you do is unplug the dryer and plug in one of these conversions as needed...
I said TEST only, the permanent way would be to match the amps required to circuit breaker, in the even of an overload....thats for safety.....but actually, the electrician who hooked up my dryer plug used the circuit breaker from the stove that was no longer in service, and thats a double 50...and never had a problem....this also allows me to test electric stoves as well, as needed...
but just the same, make sure it's a 24000 unit, that should require 220 power....your plug should have a ground, and either both flat prongs hoizontal, or one vertical and one horizontal.....if they are both vertical...THAT'S 110 NOT 220
MY 30,000BTU unit has a heavy cord and plug almost like a dryer cord.....I just want you to be safe, anything can be rigged, but safety first.....
if you can, post a pic of the plug, and the model number plate showing the voltage....