Is my central a/c charged properly?

Question

outside air temp. 85 deg. inside vent temp. 53 deg. airfilter inlet temp 76. suction line temp under insalation is 46 deg.(seems too cold). low side pressure is 61 psi. high side pressure is 180 psi. evap coils are clean and good filter. two ton thirteen seer. house is 900 square foot.

Answer 1

You need to know if you should be charging by superheat method (fixed metering device), or sub cooling (has expansion valve).

The name plate will indicate the sub cooling for expansion valve system and a superheat chart is probably behind the condenser service panel for a piston type coil.

Sounds like normal readings for an expansion valve system.

Answer 2

The proper drop in temperature is 18-22 degrees F. between  supply and return. I would say your running your fan too slow, or your coil is dirty. You are not moving enough air across the coil. Is your filter clean?

Answer 3

It seems like you're asking the question because you feel the supply air is too cold - makes the system uncomfortable to live with.  But, you don't reduce that by messing with the refrigerant charge.  You're getting a 23 degree drop which is a lot - but then, you're cooling 900 square feet with a two ton unit.

The only way to make the supply air warmer is to increase air flow.  Are any registers blocked?  Is that 'good filter' too restrictive?  Can the blower speed be increased?

It sounds like the system wasn't properly sized when it was installed.  Everybody wings it when they really should be doing proper heat loss calculations.  They figure bigger is better but then someone like you doesn't like that arctic blast coming from their registers.