Minimum Line Length Between Branch Distributor Box and Evaporator

benkitesurfs

I'm installing an LG RED system with a single condenser and 3 evaporators. One lineset runs to a branch box, from which individual line sets run to each of the evaporators. My line length from the condenser to the Branch Box is ~10m and the line sets from the branch box to 2 of the evaporators is is about 15m each. The 3rd evaporator sits right next to the branch box, so in a perfect world my line length would only be ~2m to that unit. But LG says that no individual line set should be less than 5m.

Does anyone know why this is? I understand that a short overall line length could result in an over-charged system, and undue compressor load, but why would it matter if the distance between the branch box and one of the evaporators was short?

The tubing that I have available for this run is ~3m - I can certainly coil it to keep it as long as possible, but if its critical that its at least 5m long, I will have to buy another line set, as well as set aside enough space for a larger coil.

GGross

The system may not work as designed, and you may get a bunch of vibration noises, worst case scenario the compressor gets damaged. Most importantly the manufacturer will not warranty the broken parts from this, probably try to get out of all warranty since the unit is not installed per spec.

Piping and wiring to manufacturers spec is critical. As the installer it is really the only technical thing they ask you to do and half the work is done for you already