Bitzer oil problem

[Peter_1]

The Bitzer screws I've seen had an oil pressure control but not an oil level.

[Gingerair]

I think it's a oil level switch.

Harry, have you checked the superheat in cooling, both at the expansion valve & compressor suction ??
Are you familiar with how to do this ??

[HARRY 7]

Here you can see in bottom the oil level switch.
Yes gingerair, i know how to do this,but the compressor works only for one minute,then it stops.

[lma]

Hello Harry,

add enough oil to bring you to the minimum operating level.
Run the plant on either cooling or heating, the cycle that you have no oil problems in.
Watch the oil level until it reaches the highest running level that you can see.
Stop the plant, drain the oil.
Start the plant run allow the oil level to rise again. Repeat until you take out the oil you put in.


Kind Regards Andy D

Makes the most sense to me.... you need to obtain more information in the safest possible way and that means... add the oil and run the system and see the behaviour.... does the oil run out again ? does it trip on the oil pressure switch ?if it does .. at what temperature does it happen ? ...

[oldesky]

I think Andy might be on the money. If the oil comes back on cooling you may need to check condenser design for cooling and or put a timer set to bring on the cooling mode occasionaly to return the oil.

[HARRY 7]

Hello to everybody.I went to the chiller today.I put oil in the system about 20lt.[The compressor takes 22lt].
The oil level switch was reset,but i cannot see the oil level in the sight glass.I was watching it during the filling.What could had happened?

I started the system for about twenty minutes,still no level in sight glass,and have the
below measurements in heating:

HP=260PSI
LP=42,4PSI
SUPERHEAT AT SUCTION VANE=9C
SUBCOOLING AT FILTER DRIER=8.7C
ENTERING WATER=37.7C
LEAVING WATER=39.7C
DISCHARGE TEMP=80C
OUTDOOR TEMP=10C

I checked the oil return from the accumulator.No restriction or oil there.

[JFK]

Hi Harry,

Just a concern have your problem solved?

[Peter_1]

I'm interested too Harry

[HARRY 7]

Hello guys!Sorry for not answering!I put oil in compressor but the alarm was still engaged.So i replaced the oil level switch and the problem solved!Thanks everybody for the help!