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Re: Time for another case study
Posted to HVAC Forum on 7/21/2020 2 Replies

Hello Dean:

You mentioned the system contained 100% R134a, but was there any air in the refrigerant?

Air can be present with 100% pure refrigerant, causing excessive high side pressures such as you describe.I see this often, and it confuses many techs. Login to read more.

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