Hi Everyone, we just installed a system with a fairly long (75' or so) 1 1/8 lineset. The evaporator is around 15-20' higher than the compressor. I started the system up and dialed the charge in. After the system was turned off for about 45 min I made a call for cooling and went out to the heat pump. The compressor was trying to slug liquid. I'm guessing the oil migrated over the 45 min. I'm fairly certain the fix for this is to install a P-trap. Where is the best location to put the trap???