HGB- Line bursting frequently in Lierbert Emerson PEX130FA100

[sbkvelocity]

Dear All,

I am facing a frequent break down problem of Refrigerant Leak by bursting of HGB line after the HGB Solenoid Valve. Its a precision AC, Emerson/Liebert make with CEMS100 Controller with a cooling capacity of 30kW. There are four such units installed in the Data Center and all of these units have shown this problem at different time of the year. I have done certain observation and prepared an RCA. But somehow, I am not satisfied with my own analysis. Can someone help and enlighten on what can be a possible scenario where HGB is not successful.

I am attaching the RCA (In pdf format) which I have drafted to explain the case.

Rgds
Siddhant

[Emmett]

I am not at all familiar with this type of unit, and I am assuming that the leaking is from a cracked refrigerant line, if in fact this is true then I would be more inclined to think that there is some unwanted vibration on this line and that it should be properly secured.

[Magoo]

Possible the compressors are still bolted down hard for shipping.