AC question. Electric expansion valve??

Xringer · 11-19-09, 08:05 PM

I was reading about the 'Electric expansion valve' here,
Electric Expansion Valve Control - Feature Articles - Extra Edition - Air Conditioning, Heating & Refrigeration NEWS
How they help maintain a "constant head pressure", when I remembered
seeing one on the diagram of my new Sanyo mini-split..

It's down on the lower right side. Looks like it might be a Motor controlled valve.?

Anyways, I noticed a connection on the block diagram called, MVO. Lower right.

Magnetic Coil?? I never understood what that MVO was.. Is it the 'Electric expansion valve' control??

The other mystery is "Reactance" upper left side. Is that a pickup coil
for a spinning magnet on a motor? For speed control feedback?

11-19-09, 08:05 PM	#1
Xringer Lex Parsimoniae Join Date: Feb 2009 Location: Woburn, MA Posts: 4,918 Thanks: 114 Thanked 250 Times in 230 Posts	AC question. Electric expansion valve?? I was reading about the 'Electric expansion valve' here, Electric Expansion Valve Control - Feature Articles - Extra Edition - Air Conditioning, Heating & Refrigeration NEWS How they help maintain a "constant head pressure", when I remembered seeing one on the diagram of my new Sanyo mini-split.. It's down on the lower right side. Looks like it might be a Motor controlled valve.? Anyways, I noticed a connection on the block diagram called, MVO. Lower right. Magnetic Coil?? I never understood what that MVO was.. Is it the 'Electric expansion valve' control?? The other mystery is "Reactance" upper left side. Is that a pickup coil for a spinning magnet on a motor? For speed control feedback?