Installing Heating/Fresh Air Unit

NOTE: NOTIFICATION
Opened refrigerant system for repairs.

Risk of moisture getting into the refrigerant system.
Risk of contaminating the refrigerant circuit.
Risk of saturation and irreparable damage to desiccator.
Irreparable damage to the desiccator can damage the compressor and evaporator.
→ After opening the refrigerant circuit, close off the refrigerant lines/connections immediately using the relevant stoppers. To avoid contaminating the refrigerant circuit, the stoppers for the different refrigerants must be stored and used separately.

→ The desiccator must be replaced if the air humidity is high and if the refrigerant circuit is left open for a long time.

Information

You will need a second mechanic to help you with this step.

Install heating/fresh air unit -1- .
1. 1.1 Position heating/fresh air unit -1- with rubber sleeves -3- and engage it in the brackets -2- .
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Heating/fresh-air unit
Push water drain hose -1- onto connection piece for heating/fresh air unit -2- .

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Water drain hose for heating/fresh air unit

Information

The front sealing lip of the sleeve must be touching the entire circumference of the firewall.
Insert rubber sleeves -1- into the firewall and do not pull the reinforcement rings -2- through the firewall.

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Rubber sleeves
Secure heat exchanger supply and return hose -1 and 2- .
1. 4.1 Fit heat exchanger supply and return hose -1 and 2- .
2. 4.2 Fasten spring band clamps -3- using > VAS 6891 - Spring Band Clamp Pliers .
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Heat exchanger supply and return hose
Secure refrigerant line -1- .
Replace O-ring on refrigerant line -1- .
1. 5.1 Position refrigerant line -1- and push it on.
2. 5.2 Screw in and tighten screw -2- .
> Tightening torque 8 Nm (6 ftlb.)

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Refrigerant line
Secure line connection for refrigerant line between compressor and evaporator -1- .
1. 6.1 Replace O-ring on refrigerant line between compressor and evaporator -5- .
2. 6.2 Position refrigerant line between compressor and evaporator -5- .
3. 6.3 Connect line connection for refrigerant line between compressor and evaporator -1- .
4. 6.4 Screw in and tighten screw -4- .
  > Tightening torque 8 Nm (6 ftlb.)
5. 6.5 Clip in clip -3- .
6. 6.6 Connect and lock electric plug connection -2- .

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Line connection for refrigerant line between compressor and evaporator