inverter comp with vapour injection

[MikeHolm]

OK, you lucky guys in Europe have all the good toys. Copeland makes an inverter scroll with EVI and I tried to find them over here through my normal wholesalers, no one has heard of them. 50hz only.

So my question is....so what? It is a DC motor (I think), can't I bring one over from Europe and put a 60hz inverter on it?

I haven't called copeland yet but I know they won't tell me to buy one from Europe.

[Brian_UK]

Don't know about R410a models but you can get a 60Hz R22 one from Sanyo.....

http://www.yukselteknik.com/dokumanl...alog/sanyo.pdf

[MikeHolm]

Yea, I saw that but not too much in the 1ph dept, unfortunately. Defo not much for 410A. Thanks anyway.

[Peter_1]

Yea, I saw that but not too much in the 1ph dept, unfortunately. Defo not much for 410A. Thanks anyway.

Mike, it is a normal AC motor but they use an SV to pulse hotgas on a chamber above the scroll and they lift this way the scroll at regular intervals so that it runs freely. There's a special controller to regulate the SV. Sure you can use it on 60Hz.

[Peter_1]

If you put an inverter on a digital scroll, then you do'nt need a digital scroll but a normal scroll. A digital scroll can go as low as 1% of it's full load where a VFD controlled one only can be reduced to 30 HZ (of its designed 50 Hz)
It all depends how low you need to go in your lowest capacity step.

[MikeHolm]

Thanks Peter, the vapour injection is more important than the VFD and I know it can be done without a special port. My goal is a higher CT at low ambient (-20) and while the VFD is nice, it won't get me the improved low end. Danfoss has a nice EVI comp but it is only in 38kw/3 ph and up so no good for my needs.