LG Install Questions
I found this site about two months ago and after reading this string of post decided to buy an LG 245 system with three heads to replace an old trane 10 seer heatpump in my retirement home. I now have all the parts sitting in the garage and have been reading the manuals. I have run the power and have the disconnect installed. I will wire the pigtail last. My question involves wiring the com line between the inside units and outside unit. My diagram shows three wires for each unit but the wire that came with the units has four wires. Besides L1, L2, and L3, do I use the fourth wire to run to the ground lug? Everything else seams pretty straight foward, I just am puzzled over wiring the com wire. I have an HVAC guy that will purge the lines and do the initial startup once I get the system wired.
Scott
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