20 - 2
Air Conditioning
- Refrigerant Charging and Discharging
Note: The procedures for refrigerant charging and
discharging must only be carried out by qualified service
personel who have received specialist training on the air
conditioning system.
!
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 suitable
trained person. You can be severely frostbitten or injured
by escaping refrigerant.
4-3-4-1/2
Refrigerant Recovery
The recovery process clears the system refrigerant proir to
servicing or for refrigerant renewal.
1 Ensure that the engine is OFF and the starter key
removed.
2 Connect the manifold to the system as shown, with the
blue hose connected to the system low pressure port.
DO NOT connect the red hose. Make sure that both
valves are closed.
3 Connect the yellow hose to the ‘Javac’ unit filter.
4 Connect the filter to the ‘Javac’ unit.
5 Connect the ‘Javac’ unit to an empty receiver bottle.
Weigh the bottle before and after filling to assess
system capacity.
6 Switch on ‘Javac’ unit and open the low pressure
manifold valve.
7 The ‘Javac’ unit will automatically switch off when a
pressure balance exists between the system and the
receiver bottle. Switch off ‘Javac’at main switch, but
leave the system connected. Switch on after 10
minutes, the ‘Javac’ will restart if residual pressure
remains.
8 Close valves and remove equipment.
Notes:
DO NOT fill the receiver bottle to more than 80% by weight.
DO NOT re-use refrigerant unless you are aware of its purity.
If the high pressure warning light on the ‘Javac’ unit comes
on, throttle back the manifold low pressure valve to provide
a restriction.
The JCB recommended ‘Javac’ unit only recovers refrigerant
as a gas. Other units can recover refrigerant as a liquid
and/or gas. ALWAYS check manufacturers instructions
before using.
Section B Body & Framework
9803/3280
Section B
20 - 2
Issue 1
Service Procedures
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