On/O Cycling (Cycle Rate Limit); Start-Up Sequence - Danfoss VRJ Application Manuallines

Application Guidelines
On/o cycling
(cycle rate limit)

Start-up sequence

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AB141686422149en-US0401
Operating conditions
The on/o cycling protection is included in the
variable speed drive. There is no need for extra
on/o cycling protection.
To ensure correct lubrication of all the
mechanical parts, VRJ compressors start with
a de ned ramp-up, and stay at a xed speed
for some seconds. Then the compressor speed
increases up to the desired set point according to
capacity request.