It depends...
did the refrigerant lines get brazed, system vacuumed and charge released?
Is there 220 wired to the unit?
I know...it is an information request. I answer when I know what the situation is.
Did you already have the air conditioner?
Does it just need wired at the furnace?
I do not have enough information to give you an answer yet. There is no charge for information requests.
one wire to Y and the other to C
Billy
HVAC Technician
35 years experience, HVAC