LG Heat Pump Need Neutral?

josephny

I had 3 LG heat pumps units installed (LUU18HHV, LUU24HHV and LYY48HHV) and I just noticed that the wiring to each unit includes 2 hots and a green ground. No neutral wire.

I opened the outdoor disconnect but not the wiring panel on the LG units.

I know enough to know that a ground does not take the place of (or serve the same purpose as) a neutral. Nonetheless, this is a single family house in a rural area and the grounds and neutral lines are all tied together in the breaker panel.

Is this okay?

Here's a pic:




(Don't know why a black and a red were used.)

Jamie Hall

If the equipment has no need of 120 volts -- which is actually rather common -- there's no need for a neutral. Black and red are the two colours normally used for hot lines. White would be a neutral and green ground. It would appear from the photo that somoone used a white wire for a hot, however. They should have marked it, but... that often gets overlooked.

I personally am not at all keen about the bare ground that close to the left hand break block, but... that's me.

mattmia2

If the equipment is 240v only the ratings plate will say 240vac, it it needs 120v so it needs a neutral it will say 120/240 vac.

GGross

Not familiar with the LYY part number, but the others are 208/230

when you hook up the control wire to the heads those are polarity sensitive and must be connected to the corresponding terminal on both the IDU and ODU

josephny

Thank you all!

The unit says 208/230.

Other than the ground being too close, and the white instead of red used for a hot line to the unit, it sounds like I'm fine.

Thank you!!