joweibee
27-04-2012, 03:36 AM
Hi Guys,
Newbie here.
We have this environmental chambers wherein we use a cascade system using R404A for the high stage and R508B for the low stage, when is use this chamber for medium temperature only e.g 0*C wherein it will only use the High stage compressor, it does run well and reach the setpoint but when i use it for low temp like -40C where it needs the R508B compressor, the temperature goes up instead of going down. the standby pressure of R508B is within its specification but when i run it, the suction pressure goes to 0 Psi.
any idea from you guys?
thank you in advance..
Newbie here.
We have this environmental chambers wherein we use a cascade system using R404A for the high stage and R508B for the low stage, when is use this chamber for medium temperature only e.g 0*C wherein it will only use the High stage compressor, it does run well and reach the setpoint but when i use it for low temp like -40C where it needs the R508B compressor, the temperature goes up instead of going down. the standby pressure of R508B is within its specification but when i run it, the suction pressure goes to 0 Psi.
any idea from you guys?
thank you in advance..