KKT Chiller cBoxX180, R410 A 3 Ph 400 v,77kw

[rizwankhan]

Hello ,
Any one help me in kkt chiller 77 kw using in beverage plant ,,with four Danfoss compressors ,,,The two new compressors have been replaced filter core while 24 kg gas charged in system ,,after fifteen days the system LP tripping while low pressure reached on 100 psi lower set point and machine stop,,on that time observation discharge pressure 410 reduce 350 and suction pressure 135 reduce 90 psi bother reduce run time ,,electronic expansion valve Siemens using there,,pressure are not constant both suction and discharge

[AliCanGonc]

Might be a problem on the condenser fan regulation. This happens on cold ambient? system runs with air cooled condenser?

[HwT]

Do you have a leak? What is the subcooling and superheat?

[rizwankhan]

yes its running two air cool condensers fan,,,as well as expansion device ,,siemens ,MVL661.20-2.5

[rizwankhan]

there is no leakage,,,super heat 5.1Kkkt1.jpg

[AliCanGonc]

Check the EXV % opening state. If the expansion valve goes around %10-20 while you have these trips, you have a low water flow rate. you might need to check if the pumps are running good, or strainers are clean.

if this only happens on very cold ambient, than you should change the condenser fan kick in-out setpoints. (if you do not have the opportunity to do so, than try to close 1 stage of fan and see what happens. )