Filling the air conditioning
Prerequisite:
The engine is switched off.
Heating and air conditioning system is switched off.
The refrigerant circuit is evacuated and tight.
Vehicle must be positioned on the ground.
Injury hazard!
- Note and follow safety instructions on containers.
- Avoid contact with refrigerant; wear safety goggles and hand protection.
- For additional information see: HANDLING REFRIGERANT and NOTES ON AIR CONDITIONING REPAIR WORK .
Filling a raised vehicle will result in insufficient filling levels.
In some cases, Sanden SP-A2 refrigerant oil must be injected into the refrigerant circuit.
- Determine the quantities of new
refrigerant oil to be refilled:
In addition to the drawn off and recorded coolant oil level, add the following quantities (if applicable):
- Top up the refrigerant oil losses over time as per the table.
Table 1 indicates the permitted loss of refrigerant after a specific period of time. There is no leak. Refrigerant oil must not be topped up.
Table 2 indicates the coolant oil level which must be topped up after a specific period of time with an impermissible loss of refrigerant due to a leak.
Case 1 : Refrigerant loss is not exceeded as per Table 1:
- Top up missing refrigerant
- It is not permitted to top up the refrigerant oil
Case 2: Refrigerant loss is exceeded as per Table 1:
- Top up missing refrigerant
- Refrigerant oil must be topped up additionally as per Table 2
LOSS OF REFRIGERANT SPECIFICATIONTable 1/case 1 Number of years since last filling 0-1 1-2 2-3 3-4 4-5 Permissible loss [g] -> Do not top up refrigerant oil ≤ 30 ≤ 60 ≤ 90 ≤ 120 ≤ 150 LOSS OF REFRIGERANT SPECIFICATIONTable 2/case 2 Number of years since last filling Loss of refrigerant [g] Top up quantity refrigerant oil 0-1 < 120 0 0-1 120-150 10 0-1 > 150 20 1-2 < 180 0 1-2 180-210 10 1-2 > 210 20 2-3 < 240 0 2-3 240-270 10 2-3 > 270 20 3-4 < 300 0 3-4 300-330 10 3-4 > 330 20 4-5 < 360 10 4-5 > 360 20 - Add refrigerant oil as per the table if parts of the refrigerant circuit have been replaced:
Case 1: Part exchange as preliminary work for additional work and part exchange due to slow leakage (minor leak, e.g. hairline crack)
Case 2: Part exchange due to sudden leakage (major leak, e.g. line disconnection caused by accident)
PART EXCHANGE - LEAKAGE SPECIFICATIONCase 1 Case 2 Air conditioning compressor(1). (1). (1). Evaporator 10ml 35 ml Air conditioning condenser without integrated desiccant insert 20 ml 35 ml Air conditioning condenser with integrated desiccant insert 40 ml 55 ml Desiccant insert/dryer flask 20 ml 55 ml Per replaced refrigerant line 10ml 35 ml Safety pressure switch, gaskets 0 ml 0 ml (1) Air conditioning compressor: see 6452 LUBRICATING THE AIR CONDITIONING COMPRESSOR . - Top up determined coolant oil level into the refrigerant circuit.
- Fill the amount of refrigerant as per the nameplate into the refrigerant circuit.
- Disconnect the high pressure line and low pressure line on the vehicle.
- Drain the high pressure line and low pressure line.
- Once again close the refrigerant filler neck on the vehicle with the sealing caps.TECHNICAL DATA SPECIFICATION
Fill quantity refrigerant R134a/1234yf (G14/G15/G16/G30/G31/G32/G38) B47/B57/B57O/B57S/E 550 g B58TU1 550 g B48/B58TU0 600 g N6302 650 g N63T3 650 g
