I have started building my first cascade so i bought a danfoss KP15 pressure cut-off switch . This model can monitor both low side & high side . But ... I'm having doubts if the low side switch is needed . I mean , i could buy the KP5 (only high side) ... Is the low side cut-off switch needed in cascades ???

The high side monitor is connected right after the compressor discharge (before the oil separator) , while the low side is connected before the compressor accumulator (after the evap) . Is this right ???

I set the high side cut-off to 350Psi , but I don't know where to set the low side cut-off .

I'll use R507A for the first stage & R1150 for the 2nd .

http://www.danfoss.com/NR/rdonlyres/.../PFC00A102.pdf

http://au.refrignet.danfoss.com/prod...-53127889CD57}

http://refrignet.asean.danfoss.com/T...CPICD0B102.pdf