How to make R134a the old Refrigerator R12
Channel: MANNY T. MARINO SCHOOL TRAINING VIDEO CHANNEL
Date: 21/03/2021

There are three replacement refrigerant options for R12 systems: R134a, R401a, R401b. R134a is regarded, by manufacturers and adherents to the Montreal Protocols alike, as the best replacement refrigerant.

little reminder
How much is 134a in a R12 system?
Charge with 134a between 70-80% of the original R12 charge amount. Note: Hot gas valve will need to be adjusted during the charging process to properly adjust the low side by-pass pressure to 20psi. Replace any O-rings with 134a compatible.

This anther LINK to watch:
https://youtu.be/-umD9Ic_LBM
https://youtu.be/D03orjrfpzY
https://youtu.be/O3oPs8OmR7k
https://youtu.be/WfcXH_Tjs8k
https://youtu.be/FRIkVIV4TVg