true or false

[wannafreeze]

If the adjusting spring on the crankcase pressure regulator (CPR) is tightened,the range of refrigerant pressures that can enter the compressor will increase.

true or false.

[icemeister]

The CPR valve is a close on rise of outlet pressure type of regulating valve. Increasing the spring pressure will increase the valve's controlled pressure setpoint. It will not increase the "valve's" controlled range.

I would have to choose "false".

On the other hand, If you read the question to mean the increase in maximum operating pressure increases the operating range of the "compressor", then I would choose "true".

None of the above.

[Edited by icemeister on 08-01-2004 at 08:37 PM]

[mccool]

True.
The higher the spring pressure is the higher crankcase pressure has to be to close the valve.

[hvacbear]

Originally posted by mccool
True.
The higher the spring pressure is the higher crankcase pressure has to be to close the valve.

once again true

[hi-tork]

I think CPR stands for Cardio Pulmonary Resuscitation... :-)

[hi-tork]

I think CPR stands for Cardio Pulmonary Resuscitation... :-D

[Diceman]

All pressure regulators work that way.