2891804 - 5040A10 Air conditioning refrigerant CIRCUIT - Draining and Refilling
1. Use the special Cleaner 134 draining/repressurizing equipment.
Let the engine run with the
air conditioning switched on for 10 - 15 minutes.1. Undo the repressurizing valve plugs.2. Before attaching the connectors to the needle valves, move the
knurled ring nut upwards. | For improved safety, the rapid
attachment connectors for the equipment connection pipes have different
diameters: the one for the low pressure side is larger and the one
for the high pressure side is smaller. |
3. Connect the high pressure connecting pipe (HIGH) to the corresponding
rapid attachment valve.4. Connect the low pressure connecting pipe (LOW) to the corresponding
rapid attachment valve.
Start the procedure for draining
the coolant fluid, following the instructions in the equipment manual.1. Whilst draining the system, the fluid removed from the compressor
should be collected in a special container. | The fluid is extremely hygroscopic:
avoid leaving the containers open. |
Refill the system with the same amount
of recommended fluid shown on the container.
| Type | Component | Name | Qty. |
|---|
| - | Oil | Air conditioner compressor | PAG UCON 488 | - |
If certain components are replaced,
the following quantities of fluid must be added for each of the
components replaced:
- Drier filter, 15 cm3
- Pipes, 5 cm3 /m
- Evaporator, 40 cm3
- Condenser, 40 cm3
In the case of accidental breakages which
result in the rapid draining of the system (in less than 5 minutes),
it is not possible to determine the exact amount of fluid which
has escaped because of the high pressure of the fluid. Add 50 cm
3
of fluidStart the coolant fluid repressuring procedure,
following the instructions in the equipment manual.Introduce the recommended quantity of coolant
fluid.
| Type | Component | Name | Qty. |
|---|
| - | Coolant fluid [kg] | Air conditioning circuit | R134a | 0.650 |
In the case of damage to the compressor
or other system components followed prolonged exposure to the air
of the pipes (more than 6 hours), the system "WASHING"
procedure has to be carried out, proceeding as follows.Clean the pipes connected to the compressor
using an air line.Connect the (now drained) system to the
repressurizing equipment.Introduce the recommended quantity of coolant
fluid at the high pressure side.Recover the coolant fluid from the low
pressure side.Repeat the introduction and recover the
fluid.Proceed with the system draining and repressurizing operations
as described previously. | If the system is being washed,
the entire amount of fluid in the system is eliminated. |
Refill the system with the recommended
amount of fluid.
| Type | Component | Name | Qty. |
|---|
| - | Oil (cm3) | Air conditioner compressor | PAG UCON 488 | 265 |
