Okay fellas this one has me banging my head against the wall and nothing seems right . Here is the scenario .New house (8 months old, Moved in in DEC.), new Condensing unit 3 ton Goodman model CLQ30-1B, new coil model CSCF3642N6AA, new airhandler also Goodman.
I decided to give it a once over when I noticed it was having a hard time cooling the house down.
I checked the pressures and they were as follows :
90 psig suction
suction line temp 61*
liquid line temp 85*
Evaporator temp of 53*
Condensor temp 110*
with these numbers my superheat would be 8* and my subcooling would be 25*.
My first train of thought was flow rater was feeding too much refrigerant causing head to be low and suction to be high .What was alarming is that the .065 flow rater was still attached to the Cond unit. I thought something was up when I seen it out there.
I called Goodman and spoke with a Technical assistance guy and he confirmed what I had thought . He told me that I most likely had a .078 flow rater installed and I needed a .065 in there. I mostly do commercial and Industrial and it has been along time since I had done any residential ,and I know alot of this have changed, so I wanted to call and make surebefore I changed anything.
I decided to swap them out this morning and I pumped the unit down ,changed flow raters , pulled a 29" vaccum . Opened the valves and was running a 100 psig suction and a 300+ (Liquid) all with a 78* house. I start to wonder if I installed the flow rater in backwards ,so I reverse it and vac back dwn to 29", now 110 psig suction and 200(Liqiud) .
House still having a hard time coming down to temp .
Any thought or ideas would be welcomed ?
I am tempted to put it back the way it was before and leave it , but a 53* coil seemed high to me when it should be 40!