Analize This AC Preformance

[MikeySq]

Do you ever work on your own stuff at home?? well I don't that often haha! I gotta say I have limited experience with Residential A/C. My system here at my place I don't think is doing that good of a job at cooling the place here, Yesterday it wouldn't even drop below 80*F where the stat is located, even with the temp outside yesterday around 85F and a bit of sun on 3 bigger windows with blinds closed it couldn't keep up. zoning issue maybe?

I'm going to pass on some info and we'll see what you guys think about this contraption!

R-22
Unit: Carrier M#38CK01834 (1.5ton??)
Coil: Custom Coils Inc. M#SA6979 (btu's ??)
Air handler: Temp Mizer High Velocity M# HV-52H 650CFM
Metering Device: Inline Orface

Measured at Condensing Unit
Suction: 67psi @ 42F(low superheat?)
Liquid: 210psi @ 97F
Condenser Air: 84F in, 95F out

Evap Air: 78F return, 61F Supply

Bristol pump M#H29B16UABCA OC 25
241V at contactor, 5.3A(@67psi suction)

Mike

[2old2rock]

Slightly undercharged? What's your target SH?

[BigJon3475]

http://www.bristolcompressors.com/pr...=60&Standard=E

[smittyii]

if you got 17 degrees drop across evap coil you should be cooling. any heat gain?

[southerncomfort]

What is the sq ft of the area being cooled?
A 17 degree split is good and you arent undercharged by much with those system pressures

[MikeySq]

I liked the 17 degree drop, but like i mentioned earlier i think it's just air distribution(i said zoning) and yeah i think the evening sun in the front windows are a bit of heat gain, and this is the room the stat is located. Probably nothing I can do. Space is just under 1200sq ft.

I'm not a fan of a fixed metering device and i was thinking of removing it and slapping in a TEV and a small reciever after the condenser. Think I would get better efficiency out of this or would it increase the load on the condenser. Or would it work OK i wonder. I'm sure i'd have to throw a potential relay and a start cap on the PSC compressor aswell. I may get bored haha!
Mike

[Mrfixit39]

Check Ur Filter!:d

[MikeySq]

Check Ur Filter!:d

ok, yip she's new, lol

[aircooled53]

superheat= maybe 4*
Might want to undress that evaporator and check it for dirt.If you get pressures up to maybe 76psig and superheat doesn't change then I would check coil for metering problem.

[sskzekeman]

Get the cfm, the supply and return WB temps to get delta h to determine the actual system cooling.

[BigJon3475]

Get the cfm, the supply and return WB temps to get delta h to determine the actual system cooling.

http://efficientcomfort.net/jsp/PsychroCoilCalc_Web.jsp

Get CFM wb and db entering and exiting evap. then use that calc above.

[MikeySq]

this is the info I like to see,

My CFM is 650 and I'll get some temps. DB temps I have but to get some WB temps just put my Digi thermometer probes in a wet rag and and take a reading, how do you guys get your WB readings with basic tools?

mike

[beenthere]

Digital sling.