Hi, this is a 4- ton unit you have. To understand freon pressure in a system, you have to be trained in temperature/pressure relationships. For your system, depending on the outdoor temperature, will depend on what the pressures are, and will be, in your unit. The hotter it gets outside, the faster and higher freon pressures will rise. Lets take a new package unit like your Intertherm unit, clean coils and all. With a outdoor temperature of lets say 90 degrees F, the pressure on the high side in your compressor and system should be at 265p.s.i., and the low side at around 64 p.s.i.. Your pressers in your system are constantly changing due to temperature increase or decrease. Different freons will also have different pressures then what you have R-22. The new R410A they have come out with for the a/c of now and future will be almost 2 and 1/2 times higher then the R-22!! Takes beefed up gauges, the compressor and parts that have freon in them are extra heavy duty, so it depends on the ambient temperature. When the unit is off, the pressure in the system equalizes to around 125p.s.i. on each service valve. If you are in need of help ask me and I would be happy to walk you through what ever you are doing. I am here to help for free of charge to you and this is on my personal time, so please just ask. I hope this has helped you. You do no more now then most people about pressure and temperature relationships on air conditioning. Please be kind when you rate me. That would be very good of you. I will be here if you need me. Sincerely, Shastalaker7 A/C & Heating Contractor PS A tip: R-22 will boil, or has a boiling point of around -43 degrees below zero! Water as you know is 212 degrees above zero. You can get frost bite very fast.
Answers & Comments
Hi, this is a 4- ton unit you have. To understand freon pressure in a system, you have to be trained in temperature/pressure relationships. For your system, depending on the outdoor temperature, will depend on what the pressures are, and will be, in your unit. The hotter it gets outside, the faster and higher freon pressures will rise. Lets take a new package unit like your Intertherm unit, clean coils and all. With a outdoor temperature of lets say 90 degrees F, the pressure on the high side in your compressor and system should be at 265p.s.i., and the low side at around 64 p.s.i.. Your pressers in your system are constantly changing due to temperature increase or decrease. Different freons will also have different pressures then what you have R-22. The new R410A they have come out with for the a/c of now and future will be almost 2 and 1/2 times higher then the R-22!! Takes beefed up gauges, the compressor and parts that have freon in them are extra heavy duty, so it depends on the ambient temperature. When the unit is off, the pressure in the system equalizes to around 125p.s.i. on each service valve. If you are in need of help ask me and I would be happy to walk you through what ever you are doing. I am here to help for free of charge to you and this is on my personal time, so please just ask. I hope this has helped you. You do no more now then most people about pressure and temperature relationships on air conditioning. Please be kind when you rate me. That would be very good of you. I will be here if you need me.
Sincerely,
Shastalaker7
A/C & Heating Contractor
PS A tip: R-22 will boil, or has a boiling point of around -43 degrees below zero! Water as you know is 212 degrees above zero. You can get frost bite very fast.