jcb JS300 Service Manual page 380

Safety Procedures
The air conditioning system includes a pressurised closed
circuit containing a non-CFC, environmentally friendly
refrigerant, Type R-134a. Any service procedure which
breaks into the closed circuit and therefore requires
discharging of the system, must only be carried out by
service personnel with specialist knowledge of air
conditioning systems. The following guidelines should be
adhered to by all personnel servicing the air conditioning
system.
!M
WARNING
The air conditioning system is a closed loop system
and contains pressurised refrigerant. No part of the
system should be disconnected until the system has
been discharged by a refrigeration engineer or a
suitably trained person. You can be severely
frostbitten or injured by escaping refrigerant.
4-3-4-1_2
!M
WARNING
The air conditioning system is a closed loop system
and contains pressurised refrigerant. No part of the
system should be disconnected until the system has
been discharged by a refrigeration engineer or a
suitably trained person. You can be severely
frostbitten or injured by escaping refrigerant.
4-3-4-1_2
!M
WARNING
The air conditioning system is a closed loop system
and contains pressurised refrigerant. No part of the
system should be disconnected until the system has
been discharged by a refrigeration engineer or a
suitably trained person. You can be severely
frostbitten or injured by escaping refrigerant.
4-3-4-1_2
!M
CAUTION
Do not operate the air conditioning system when there
is no refrigerant in the system, otherwise the
compressor will be damaged.
4-3-4-4
1 It is critical that the correct refrigerant (R-134a) is
used and that charging is done only by qualified
personnel. As a precaution, in case of accidental
leakage, discharging and charging of the vehicle
B-11
Section B - Body and Framework
Heater/Air Conditioning SYSTEM
refrigerant system must be conducted in a well
ventilated area.
2 Containers of refrigerant should be stored in a cool
environment away from direct sunlight.
Do not carry out welding operations close to the air
conditioning refrigerant circuit. A poisonous gas is
produced when refrigerant comes into contact with
naked flames. Do not smoke or allow naked flames
close to the refrigerant circuit.
BF-1-9
3 Do Not perform welding operations close to
refrigerant hoses (maintain a distance of at least 0.5m
from hoses).
4 Do Not steam clean refrigerant system components.
5 When charging or discharging the refrigerant system
refrain from smoking. Naked flames must not be
allowed in the immediate vicinity. The refrigerant does
not give off a poisonous odour, however, when it
comes into contact with a naked flame, a poisonous
gas is produced.
6 When handling refrigerant, rubber gloves and
goggles should be worn. Operators should ensure
that no refrigerant comes into contact with the skin.
Particular care should be taken when connecting or
disconnecting charging hoses or pressure switches.
When these components are connected to the
system, a short release of refrigerant occurs. This
results in a high velocity, very cold gas being emitted
from the connection point.
9813/5100-1
Operation Overview
!M
WARNING
B-11