Line set sizing?
What affects or damage can occur when running smaller diameter lines for a discharge or suction line? I know deff higher head pressures. I'm new to the field experts please chime in..Also new to the site hello everyone..
Possible shortened compressor life.
If the suction line is too small, you may not get proper oil return to the compressor. You also can have a reduced capacity.
An undersize vapor line doesn't hurt oil return.
Too large of a vapor line can.
WOW! I hope you don't do refrigeration! OOPS... Read it wrong Beenthere! Need to assure proper velocity Horizontal increase size, vertical decrease.
Last edited by heatingairman; 07-06-2008 at 11:12 PM.
Reason: Read wrong
Both A/C and refrigeration.
A vapor line 1 size undr will never hurt oil return.
The next size up however can on installs with the condenser vertically above.
Recommended min suction line velocity is 1000 FPM. I have vapor line sizing charts for unit that allow the vapor line to be sized for up to 3000 FPM.
I don't have any that approve less then 800 FPM. And they don't want a vertical rise to the condenser.
If you have line set sizing charts that allow 500FPM velocity in the vapor line, post them.