and charging the system. Although R-12 is considered
the safest refrigerant for automotive air-conditioning
systems, the containers are under considerable pressure
at ordinary temperatures. To prevent accidents or
damage to the system, you must observe the following
. Do not subject the containers to excessive heat
and do not store them in direct sunlight or near a shop
. Use hot water (fig. 13-2) or rags saturated with
water at temperatures not to exceed 125°F when
refrigerant containers must be warmed for system
. Never use a direct flame or a heater to warm
containers or cans.
Figure 13-2.Warming the refrigerant by using hot water.
l Do not subject refrigerant containers to rough
l Do not drop or strike containers.
l Keep refrigerant tanks upright, and be sure the
metal cap is installed to protect the valve and safety plug
when the tank is not in use.
l Do not transport refrigerant tanks or cans in
vehicle passenger compartments.
l Cover the containers to protect them from direct
sunlight when they are carried in an open truck.
l When you dispense refrigerant from cans, use the
specified can valve that has provisions for puncturing
the can only after the valve is installed.