Refrigerant Lines With Inner Heat EXCHANGER, Removing And Installing: Installing

WARNING: This page does not describe the selected car, but rather 23 other vehicles, including the 2017 Audi S5, 2017 Audi A5 Quattro, 2016 Audi S5, 2016 Audi A5 Quattro, and 2015 Audi S5. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Checking Connections In Expansion Valve -B- And On Refrigerant Line -D-

Courtesy of AUDI OF AMERICA, LLC

Installation is done is reverse order, observe the following:

NOTE:

Electrical connections and routing. Refer to Wiring Diagram.

-- Thoroughly clean all the connections in the expansion valve -B- and in the refrigerant line -D- with the inner heat exchanger.

-- Check the connections in the expansion valve -B- and on the refrigerant line -D- for damage.

-- Replace the quick-coupling connection on the refrigerant line with inner heat exchanger. Refer to REFRIGERANT LINES, DISCONNECTING FROM QUICK-RELEASE COUPLINGS AND CONNECTING

-- Replace the O-rings -A and C-. For the correct version. Refer to the Parts Information.

NOTE:

Follow the instructions for installing the O-rings. Refer to REFRIGERANT CIRCUIT SEALS .

-- Coat the O-ring seals lightly with refrigerant oil before installing. Refer to REFRIGERANT CIRCUIT SEALS .

-- Make sure the O-rings fit properly inside the grooves on the refrigerant line connections -D-.

-- Tighten the bolts -E- for the refrigerant line -D- with inner heat exchanger.

Tightening specification -E- : 10 Nm.

NOTE:

On certain versions, the refrigerant line with an inner heater core -A- also has a weight (balance) -B- to reduce noise. When installing the refrigerant lines with an inner heat exchanger and the plenum chamber bulkhead, make sure the weight and the refrigerant line are not too close to the other components or touching them.

Fig 2: Identifying Refrigerant Pipe Weight

Courtesy of AUDI OF AMERICA, LLC

-- Clean the connections on the refrigerant pipe and check for damage.

Fig 3: Inspecting Refrigerant Line Connection

Courtesy of AUDI OF AMERICA, LLC

-- If applicable, inspect the alignment pin -4- for damage and check that it is seated correctly.

-- Inspect the guide ring -2- on the refrigerant line connection for damage.

NOTE:

Coat the O-ring with refrigerant oil before installing. Refer to REFRIGERANT CIRCUIT SEALS .

Make sure the O-ring fits correctly inside the groove in the refrigerant pipe.

-- Insert the O-ring seal -3- into the groove -arrow- on the refrigerant line connection -1-.

-- The cover -1- must sit correctly on the refrigerant pipe -2- as illustrated.

Fig 4: Identifying Refrigerant Pipe Connection

Courtesy of AUDI OF AMERICA, LLC

-- Make sure the rubber bushing -4- is seated in the mount.

-- Install the refrigerant pipe -6- on the inner heater core and tighten the bolt -5-.

Tightening specification: 9 Nm.

-- Attach the refrigerant line -3- to the quick-coupling connection. Refer to REFRIGERANT LINES, DISCONNECTING FROM QUICK-RELEASE COUPLINGS AND CONNECTING .

NOTE:

Install refrigerant line such that it is not strained.

Check installation position of refrigerant line to expansion valve (it should not come in contact with other components).

-- Install the remaining removed components.

-- Evacuate the refrigerant circuit and fill it. Refer to REFRIGERANT CIRCUIT (Refrigerant R134a, Servicing; Refrigerant Circuit, Using Service Station).

-- Operate the A/C system after filling the refrigerant circuit. Refer to A/C SYSTEM, STARTING OPERATION AFTER FILLING REFRIGERANT CIRCUIT .

-- Turn on the ignition.

-- Check the DTC memory and erase any displayed entries using the Vehicle Diagnostic Tester in the "Guided Fault Finding" function.