Heat pump compressor ZH45K4E with frequency converter

[ENERGY-MW]

In my heat pump I have compressor ZH45K4E is it possible to connect it to frequency converter (to make it variable speed)? I understand there can be problems with greasing as oil circulation may decrease, but may be runing at 70-80% will not be harmfull, also COP will go down. Anybody has experience with it?

Now days I would install varaible speed compressor designd specially for this kind of operation and control.

[install monkey]

http://www.emersonclimate.com/europe/ProductDocuments/CopelandLiterature/C071002_0507_E_Scroll__Soft_Start__0.pdf bit of info

[install monkey]

http://www.emersonclimate.com/europe/ProductDocuments/CopelandLiterature/C070901_0303_0104_E_ScrollMotors_2.pdf found this too

[Brian_UK]

They do not recommend it but it may be possible if you can get clearance from Emmerson.

Read para 5.14, here...
http://www.emersonclimate.com/europe/ProductDocuments/CopelandLiterature/C060209_1111_0512_E_AGL_HPScroll_FULL_0.pdf

[ENERGY-MW]

from 5.14..... is possible but should not be done without specific Application Engineering review.

Thanks a lot. I will try to push some info from local representative and in meantime will start installation of ABB inverter.