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airheatman
airheatman, HVAC Technician
Category: HVAC
Satisfied Customers: 7724
Experience:  Furnace, A/C and heat pump specialist.
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JUST CHECKING R 22 LEV. WHAT SHOULD THE PRESS GH AND LOW?

Customer Question

JUST CHECKING R 22 LEV. WHAT SHOULD THE PRESS HIGH AND LOW? THE EVAP FROZE UP ONCE LAST YEAR AND ONCE LAST WEEK
JA: I'll do all I can to help. How long have you been dealing with this?
Customer: I JUST PUT THE GAUGES ON TODAY, I WORKED ON CARS FOR 30 YEARS. NOT SHOURE WHAT THE GAUGES SHOULD BE AT
JA: Do you plan on doing the work yourself?
Customer: JUST TO CH. WHEN WE NEED TO REPLACE I WILL HAVE IT INSTALLED
JA: Anything else we should know to help you best?
Customer: NO JUST SEEING IF WE CAN MAKE IT LAST THE SUMMER
JA: OK. Got it. I'm sending you to a secure page on JustAnswer so you can place the $5 fully-refundable deposit now. While you're filling out that form, I'll tell the HVAC Technician about your situation and then connect you two.
Submitted: 5 months ago.
Category: HVAC
Expert:  airheatman replied 5 months ago.

Pressures should run approximately 69 psg on suction and head may vary between 225 and 250.The 69psig converts to a 40 degree coil.

Expert:  airheatman replied 5 months ago.

Note from image below, 69psig is ideal with a 40 degree coil. Coil will start icing at about 55psig as that converts to a 32 degree coil.

(Note the green scale on gauge shows coil temperature)

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