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hodgy911
15-06-2010, 02:17 AM
new to ac gota a roof top unit suctions and head pressure fine airflow is good too but the suction keeps freezing back from outlet of evap to comp.low superheat but subcooling is fine its an orfice not txv

goshen
15-06-2010, 04:54 AM
new to ac gota a roof top unit suctions and head pressure fine airflow is good too but the suction keeps freezing back from outlet of evap to comp.low superheat but subcooling is fine its an orfice not txv
Hi double post ??????????????????????????????????:rolleyes:?????????????????????????????????????

cdub
20-06-2010, 07:21 PM
You should check your evap. coil if the superheat is low. That should be telling you that your not boiling off the right amount of referigerant in the coil. Which could be caused by of course dirty return filters, dirty coil, collapsed return air. Check the indoor fan to be sure its running up to speed.

sedgy
20-06-2010, 07:36 PM
hi hodgy911,
put the indoor fan on high speed

monkey spanners
20-06-2010, 08:24 PM
What they ^ said, Also would be worth checking the indoor blower wheel for dirt/dust, it doesn't take much to reduce the amount of air it moves.

Could it have a restricted drier and or have been overcharged?