Type: Posts; User: handymanjack
Ok Thanks will try wed. How about the txv sizes?
Ok! Then use two 3.5 ton expansion valves? And also use long radius ells, but how about the tees they will be straight?
I charged unit til i had a 14 SH
No! Some people bought a ahu to replace their leaking coil one. Thier old unit is a r-22 single circuit. They were told that no more R-22 AHU 7.5 ton can be found so they bought this dual circuit...
I am changing out a 7.5 ton R-22 single circuit AHU, to a 7.5 ton 410A dual circuit. I know i have to change expansion valve back to R-22. But what else?
Is the air handler in the attic? Is the attic insulated? If not this maybe your problem.
Your return air needs to come from the high wall or ceiling. Then check pressures.
Hey thanks I'll add freon. 410A oh well!
dry bulb 74
2 ton air handler had .55 nordyne said change to .53 even though book said .50
chart say's 31 superheat. Condenser air in 83, Return air in 74
Broan unit. low 130- high 295 suction line temp 74. Return air 75, supply vent
63. Outside temp 82.changed to .53 orifice. 50 feet of line set Afternoon gets 84 in house. 2nd floor unit. 1.5 ton...
moved return to high wall today. Numbers changed. House was 86 at 9:00am
12:30 i finished return. House was 84 when i left. Temp 95 outside, house has no wall or attic insulation or attic fan. High...
Well I'm back. Nordyne has figured the question out.
Remember i said no insulation! move low wall return to high wall
sorry, unit is a broan , nordyne product
checking unit again thursday will update Thanks
It keep it somewhat cool. Owner has a portable unit in his bedroom. This being a sign unit did not keep up. All numbers seem to check out. Sorry about wet bulb didnot check. Also charging chart only...
didnot check superheat. Has expansion valve. temp took at return grille. Home has a wooden chase as return? did not check wet bulb
I recently installed a 2 1/2 ton split a/c and 95% furnace in attic. Old system was 2 1/2 ton. It has iced up 5 times. Each time i changed duct or added some freon 410A system. Return is a 18" 12'...