Instruction: Extract information from the supporting document to answer the given question.

Input:
Question: What is the code for the type of wall receptacle needed to plug in this 230V unit?
Document: No Complaints. research the plug type. It is a little different. Otherwise, I have no complaints about the system. aa
It seems to work great.The thru the wall a c type was pretty easy  to install.You remove a few screws [4] and the guts slide out.You screw the outer box in and slide the guts back in.I would say its quiet.I,m happy.
it weighs about 160lbs. don't try moving it on your own!you will need a 220V outlet for this to work. it DOES NOT plug into the standard 110V.i unpacked the unit and with a helper loaded it in the slot.
Now I have this crap unit installed in my wall, and I have to take it out, and back to the store. Beware of this unit as it only seems to cool the room it is installed in.
This Fridge is a beast though not the largest Frigidaire offers in a window or through-the-wall unit. It was delivered next day when I expected a week's time and was extremely welcome as my 50 year Amana 15000 BTU died during the July heat wave. Heavy and requiring me and the UPS driver to wrestle it of the truck and into the house, I suggest putting it on a stout stand or temporary table to disrobe it.
This AC was bought to replace an old 23,500 BTU thru the wall unit. I installed this myself in the same place where that old AC was. Install was rather easy, and I am not sure why people are saying that it was difficult or confusing. NOTE THAT YOU NEED A 220V OUTLET FOR THIS AC! !First, the people who say that this AC is noisy must not have installed it properly. For its size and power, this unit is very quiet.
Keep that in mind. Installing was about typical for this type heavy AC. I also noticed it reduces humidity rather well. I am very content with this AC.
then i remembered growing up we had one in the wall. located the panel and took out the wood filler panels exposing a nice hole for a new window a/c.let me give everyone a hint of advice. DO NOT TRY to buy any window a/c from say june to end of august. i don't know what it's like in other parts of the country but at least in my region (virginia) retailers can't keep up with the demand.
(b) It's 220V -- more-efficient than 110V units(c) the remoteIt can be used as a thermostat for the main unit (if in line-of-sight).
One was missing the remote. All were shipped in their original boxes, and the boxes were poor condition; there were exposed portions of the unit, with lots of tape that wasn't applied by the manufacturer. I returned all of them. I spoke with Amazon's customer service.
Answer: The manual that shows the plug is here:  http://manuals.frigidaire.com/prodinfo_pdf/Edison/FRA186MT2_0411.pdf .  Under the picture of the plug it says Plug Type (NEMA) 6-15P