high sbcooling in heay low in ac

[beenthere]

yeah i thought about the unmatched possibility ill get the m/s numbers but no i got the trurn air with a ductulator duct is sealed and not kinked so i figured it was pretty close thanks for the tip about superheat though. makes sense.

You figured out return air flow with a duculator?

[Barrettservices]

[QUOTE=gravity;15287331]Sounds to be over charged in heating.

You need 450cfm/ton for heating mode.

Where do you get this number? I do heatpumps all the time and have never got them to pull 450cfm/ton and they work great. All specs i have ever seen say 375 -400 a ton is fine. Or am i wrong?

[garyed]

The SST is warmer than the outdoor air.
The possible causes I can think of are overcharge, metering device over feeding & low indoor airflow.
We can eliminate the outdoor TXV over feeding so there's not much left. I wouldn't be surprised if it had both low airflow & was over charged.

[bkmichael65]

[QUOTE=Barrettservices;15296451]

Sounds to be over charged in heating.

You need 450cfm/ton for heating mode.

Where do you get this number? I do heatpumps all the time and have never got them to pull 450cfm/ton and they work great. All specs i have ever seen say 375 -400 a ton is fine. Or am i wrong?

Heat mode calls for the same airflow as cooling. 400 +/- 50 a ton

[gravity]

heating needs more airflow because the coil is smaller. look it up

[Barrettservices]

heating needs more airflow because the coil is smaller. look it up

I did and in every rheem air handler manual i looked into they show the same cfm for heat or cool mode with a chart that shows cfm compared to static pressure and not one is over 400 cfm/ton and they will even accept as low as 350cfm/ton. Also we are regulated in california by calcerts and they never test for anything over 350cfm/ton period.

Where are you seeing this?