Quote Originally Posted by Edwin View Post
Quick question - does anyone know how much R134A refrigerant a dual-evaporator system requires? The only information I've been able to find is from an early workshop manual, which specifies 1kg of R12 (presumably for a single-evaporator system).
If it's got a receiver, charge weight is quite uncritical.


I'd charge to pressure of the low and hi side. Start off with a "drop charge" of 750 gms of R134a and monitor low side and centre vent temperature.

And trim the charge accordingly.