Oil pressure issue Howden WRV255, stumped again

[Josip]

Hi, Tycho

It's a vertical oil separator, the sightglass is a vertical glass approx 40 cm long.

I know the internal design of the oil separator, the suction for the oil pump goes in below the level glass and it has an elbow going down once inside the separator, so the oil pump suction is another 15/20Cm below where the suction pipe enters the oil separator.

This unit is still running 15C hotter than the twin, so we are still going to try to replace the thermo element of the ORV to see if we can get it down to running conditions I am more happy with.

They recently expanded with 3 more WRV255 units on a separate system that are running equally high discharge temperature, so if we can get it down by replacing the ORV element, they will request the contractor for the other plant to do the same.

ORV is Amot or Danfoss ... thermostatic element can be different so does the oil temperature ... it is possible to replace element, but the main question is if the oil cooler is capable to cool the oil then the ORV will do the rest ...


Best regards, Josip