Question about Bryant 462AJC021BA Air Conditioner

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No cool 80 supply temp

410a unit in cool mold pressures 148 Low 275 high with 80 something supply temp inside

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Check amp draws on ahu. Sounds like heater is on as well, pressures are reasonable

If you need further help, reach me via phone at https://www.6ya.com/expert/thomas_092728000e6acb79

Posted on Mar 08, 2016

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That is a high suction pressure should be running about 46 psig and head pressure should be amibent temp or outside temp and add 25 to it. that will give you approximate head temp. sounds like you have a dirty condenser I would clean it. Check your amp draw on your compressor if its high then I would check for dirty condenser. You can clean it with a stiff hair brush go up and down do not go sideways because you can damage your fins on the coil. Then take a water hose and wash it out. turn off the power to the unit before cleaning do not clean with compressor running. turn off the breaker box. I hope this helps.

Posted on Jul 15, 2010

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??? 80 degrees ??? Anything below 100 psi is going to start freezing up. 410a refrigerant is approximately 32 degrees at 100psi. Typically a 410a low pressure switch will open at 50 psi.

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DRHQ0421 HI PRESSURE SWITCH


Any pressure switch in the same range will work. R22 Rage about 350 cutout 275 cut in. R410A 550 cutout 450 cut in. Most F22 Head pressure ranges about 225 to 275 depending on the Ambiant temp. 410A about 350 to 425 psi. Keep in touch Johnstone supply handles Coleman evcon go to ther website or call there toll free number in your area and give them the model number and they can match it or cross it over to one that will work. Rus

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Indoor unit temperature between 60F & 70F after R22 charge..


The pressure changes with temperature, it is not a true gauge to ensure a proper charge.

You should have a 15 to 20 degree temp drop across the evap coil. (return air vs supply air)

Can you verify that the compressor is running?
Not the condenser, but the compressor located inside the condenser (outdoor unit)

it really sounds like it is still undercharged.
Check the temp drop, let me know what it is.
Also tell me what the outdoor ambient temp is.

( for example.... 98 degree outdoors with 85 degree indoor temp could result in pressures something like 325 on the high side and 75 or 80 on the low side.
With the exact same unit, but 80 degree outdoor temp combined with 70 degree indoor temp, your pressures could read 215 low side and 55 low side. Not to mention that more efficient units often have higher pressures on the low side because they have more coil space and remove heat more efficiently)

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Sustion or low pressure depending on indoor temp about 70-75 head pressure will vary with a,bient temp. But no moe than 260 to 275. Rus

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