Suction/discharge Pressure

[pramodphilip]

This compressor is a heavy duty chiller compressor(Copeland). This is having a temp. cut in- cut out settings of 8 to 12 degree celsius. When the compressor is running it is having a suction pressure of 60 psi and discharge pressure of 160 psi, but as soon as it cuts off discharge pressure equalises with the suction pressure and comes to 120 psi. And the cooling side is also not that effective. It is just cooling only. What may be the problem?
:mad:
Thanks and Regards
P.Philip

[moideen]

This compressor is a heavy duty chiller compressor(Copeland). This is having a temp. cut in- cut out settings of 8 to 12 degree celsius. When the compressor is running it is having a suction pressure of 60 psi and discharge pressure of 160 psi, but as soon as it cuts off discharge pressure equalises with the suction pressure and comes to 120 psi. And the cooling side is also not that effective. It is just cooling only. What may be the problem?
:mad:
Thanks and Regards
P.Philip
mone eda.......philipe...tell me ur comp model no;compressor amps;and chiller model no:
cheers

[icecube51]

is there a TEV or capillary ?

i think that it equalizes after the compressor stops, so if there's a capillary it has a small marble inside it filter,whits functions as a flow valve.

but for the temperature you have to see if there is enough of refrig. do your calculations.;)

Ice:cool:

[jure]

Do you have a electromagnetic valve on the liquid line, it shold be right before the TXV

[GXMPLX]

Why do you start a different thread, stick to the one you already started!

Pressures equalizing is not nessesarily a problem. It only COULD be if the equalization is fast that could indicate an efficiency problem.

Compressor model?
Refrigerant?
While suction is at 60 psi what are:
Water flow?
Evaporator inlet temperature?
Evaporator outlet temperature?

Condenser fluid temperature?

Only with this data you could START to diagnose the system.