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69sixpackbee · 07-16-2003, 07:42 PM

To optimize the cooling using 134 in R-12 systems, get a larger, condenser and add a fan as suggested. 134 needs approx. 20% MORE condenser area than that of R-12 even though you use approx. 20% LESS refrigerant. The old POA system works well when replacing the orifice with a Ford blue tube. It is HIGHLY recommended to change out your old A/C hoses with new barrier type EPDM pieces. It will work well just make sure that the orig. mixing doors seal properly and the heater valve is operating properly as well. You can add a manual shut-off throttling valve in the heater line as well.

07-16-2003, 07:42 PM	#12
69sixpackbee Registered User Join Date: Jan 2001 Location: Sabinal, Texas Posts: 1,706	To optimize the cooling using 134 in R-12 systems, get a larger, condenser and add a fan as suggested. 134 needs approx. 20% MORE condenser area than that of R-12 even though you use approx. 20% LESS refrigerant. The old POA system works well when replacing the orifice with a Ford blue tube. It is HIGHLY recommended to change out your old A/C hoses with new barrier type EPDM pieces. It will work well just make sure that the orig. mixing doors seal properly and the heater valve is operating properly as well. You can add a manual shut-off throttling valve in the heater line as well.