Date: Tue, 7 May 1996 11:39:37 (EST)
Sender: Vanagon Mailing List <vanagon@vanagon.com>
From: "Eric Zeno" <eric.zeno@mail.industry.net>
Subject: AC RETROFIT R12 to R134a
VANAGON AIRCONDITIONING
RETOFITTING R12 SYSTEMS TO R134A SYSTEMS
MODEL: 1985-1992
This infomation came from Mitchell international 1995 data
Cautions: Part numbers for reference only. check with your
parts dept. for latest info.
Always use seperate refrigerant recovery, recycling
recahrging and etc. equipment. Damage to equipment
will resault.
Do not blow compressed air and nitrogen through the
compressor or expansion valve. Refrigerant circuits
retrofittied to use R134a must not be rinsed with R11.
Always replace receiver drier if refrigerant circuit
it left open.
Due to residual amounts of mineral based refrigerant oil
in systems retrofitted the newly installed PAG refrigerant
oil will discolor immediately after use. This is normal
does not indicate a refigerant related fault.
PARTS REQUIRED:
PAG refrigerant oil- Vanagon 240 cc(8 fl oz) Part No. G 052 100 A2
VANAGON
Eurovan 135 cc(4.5 fl oz) Part No. G 052 154 A2
EuroVAn
Adapter/Label kit Part No. 357 820 794
This is just adapers to the high and low press
service valves.
Reciever drier Vanagon up to 24 G 075000: 253 260 633 D
from 24 G 075001: 253 260 633 E
Eurovan 701 260 191 E
O-rings Rciever drier 803 260 749
(Canada Eurovan) 803 820 749A
O-rings compressor Vanagon 253 260 749
Eurovan 803 260 749 B
Refrigerant R134a Vanagon 1350 g (47.6 oz)
EuroVan 950 g (33.5 oz)
All part numbers for reference only
PROCEDURE:
-- Discharge and capture refrigerant R12 using appropreate equipment.
-- Evacuater system to remove any R12 contaminants.
-- Remove compressor, unscrew oil drain plug and drain refrigerant oil.
-- Replace defective components. Add PAG oil directly to new system
component, as per the following chart. Never exceed the total system
oil capacity.
Condenser 0 cc
Evaporator 60 cc (2 fl oz)
Receiver Drier 10 cc (.3 fl oz)
High Pressure Hose 10 cc (.3 fl oz)
Low Pressure Hose 10 cc (.3 fl oz)
Vanagon Total System Oil 240 cc (8 fl oz)
Eurovan 1 comp. Total System Oil 135 cc (4.5 fl oz)
-- Refill compressor, with remaining amount of PAG oil to equal the
total system oil, and install with new o-ring seals.
-- Replace receiver drier. Use new o-ring seals.
-- Install correct R-134a service valve, from adaper kit.
high pressure- 3/8" thread
low pressure- 7/16" thread
-- Evacuate system for a minimum of 30 minutes.
-- Charge system with refigerant R134a.
-- Perform a/c system quality check and leak test.
-- Install new R134a adhesive labels over R12 labels.
A personal note:
That's all there is to it in a Vanagon. I have installed AC in
a few autos but have not tried a R134 conversion yet. It sounds
to easy to be true. But to the best of my knowledge the source
of this infomation is very reliable. If anyone gives this a try
please Email me with the results.
ERic ZEno emz@nauticon.net
86 Syncro - Broken stablizer link this week
86 GL (FS)
72 240Z
1936 Chrysler
P.S. As I uploaded this file my secretary handed me my mail
with info on FRIGG FR12. Form Fit and Function compatable
with R12 HUmmm????