FREEZE 12®
Conversion Data

WT. OF R-12
WT. OF FREEZE 12
OUNCES  FREEZE 12
 
1 lb.
.9000 lb.
14.4 oz
 
2
1.80 lbs.  (1 lb. 12.8 oz)
28.8
 
3
2.70 lbs.  (2 lbs. 11.2 oz.)
43.2
 
4
3.60 lbs.  (3 lbs. 9.6 oz)
57.6
 
5
4.50 lbs.  (4 lbs. 8.0 oz.)
72.0
 
6
5.40 lbs.  (5 lbs. 6.4 oz.)
86.4
 
7
6.30 lbs.  (6 lbs. 4.8 oz.)
100.8
 
8
7.20 lbs.  (7 lbs. 3.2 oz.)
115.2
 
9
8.10 lbs.  (8 lbs. 1.6 oz.)
129.6
 
10
9.00 lbs.  (9 lbs. 0 oz.)
144.0


When charging the A/C system with Freeze 12, use the above chart to match the manufacturers requirements. Freeze 12 is lighter than R-12, so less refrigerant is needed to equal the same volume in the cooling system. Recover the R-12 from the A/C system at the Low Side to leave behind as much mineral oil as possible. Because some oil is lost during recovery and when changing accumulator/drier or receiver/drier, for maximum A/C system performance, it is recommended that 3 ounces of Polyol Ester lubricant (also known as Ester lubricant) be added to the A/C system before charging with Freeze 12.

Install new Freeze 12 service fittings (Johnsen’s # S19002 - Low Side, #S19000A or #S19001A - High Side). If the A/C system being converted is equipped with a High Pressure Relief Valve, a High Pressure Cutout Switch must be installed in accordance with EPA SNAP regulations. Deep evacuate (using Sercon # SR1255A Deep Vacuum Pump or equivalent) to remove any residual R-12 and/or any non-condensables.

Recharge the A/C system with approximately 10% less Freeze 12® than the recommended factory R-12 charge (refer to the chart above). When the A/C system is fully charged with Freeze 12, the suction line pressure will be about 5-10 psig lower than it was with R-12, depending upon the system. When charging the A/C system with Freeze 12 into the suction line, note that the pressures will rise and then level off as the system becomes filled. DO NOT OVERFILL THE SYSTEM! Overfilling may cause damage to the compressor and other A/C components! When the A/C system is fully charged, drive the vehicle for approximately 5 minutes with the A/C controls set at maximum A/C to initially balance the system. Thereafter, operate the system normally. Finally, install the Freeze 12 service label (Johnsen’s # S19020A).