Pumpdown of Trane Chiller RTHB 450

[skygod007]

Hi all,
I have a Trane Chiller with model number: RTHB 450. Could someone please inform me on proper pumpdown sequence of this chiller? It has a condenser isolation valve after the condenser. This would still be part of the liquid line, if I am not mistaken. Could that be used to pumpdown? Could someone give me the correct procedure in doing this step by step.
Regards,
Skygod

[frederik79]

Hi all,
I have a Trane Chiller with model number: RTHB 450. Could someone please inform me on proper pumpdown sequence of this chiller? It has a condenser isolation valve after the condenser. This would still be part of the liquid line, if I am not mistaken. Could that be used to pumpdown? Could someone give me the correct procedure in doing this step by step.
Regards,
Skygod

are you sure they use that valve to pump down ??.
in some cases they use that valve compr off => valve off
why .. to stop liquid migrating.

if its used for pump down => temp ok => valve on
compressor stops on low pressure.

hope this helps a little