Re: A/C recharge questions

["Barton P. Chambers" <bchambers@atlantic.nos.noaa.gov>]

Hi Vladimir,

> Why the Bentley recommends to evacuate system before recharging?

This procedure applies to *all* conventional air conditioner systems using 
refrigerant under vacuum.  If you wish to successfully charge one of these 
systems, it is *absolutely* essential to pump out the remaining refrigerant
under vacuum, or you *will* get air in your system, and lose the ability
to cool.

> Is it possible just to add a pound of refigerant ?. 

No, (well, yes, it is possible, but not it you want the system to function
correctly afterwards.  see above.)

> oil needs to be added while adding refrigerant?

I don't know.  Sorry.


Cheers,

Bart Chambers
'77 Feline Varmint Felix, Gray Tabby
'86 Carrera Cabriolet, Guards Red
'87 *VW* Quantum Syncro (Stealth Quattro)