joining 2 danfoss bd 50's together

[audiun]

Hi I have 2 bd 50 compressors and I am modding a 700L fridge to DC for a solar house. I am installing these bd50's 1 first and see how it goes then add the other if 1 cant do the job. I've noticed that danfoss have a compressor package with 2 bd35's connected together but I have been unable to find how they've connected the suction and discharge lines has anyone worked with the double bd35 packs kind regards Simon

[nike123]

http://www.ra.danfoss.com/TechnicalInfo/Literature/Manuals/06/bd_compressors_11-2009_pk100c902.pdf (http://www.great-water.com/pages/FB_drawings/fb52w-dim.htm)

Page 24!
Twin compressors have extra oil equalization outlet on housing which are connected together in assembly.
Ordinary BD 50 doesn't have that outlet and cannot be connected in parallel.

[edit by Brian_UK] Above link goes to a drawing, link below for the document..
http://www.ra.danfoss.com/TechnicalInfo/Literature/Manuals/06/bd_compressors_11-2009_pk100c902.pdf