The evaporator is removable for replacement in case of failure.
The evaporator is installed in the interior heating and air conditioning unit
The evaporator is made of aluminum tubes with external fins.
Passing through the evaporator tubes, the boiling refrigerant actively absorbs heat from the air blowing over the outer surface of the tubes.
The air is cooled and supplied to the passenger compartment.
Preparing the car for work
We install the car on a lift or a viewing ditch
Release the refrigerant as described in the article "draining the refrigerant"
Using a 13 wrench, unscrew bolts 3, figure 1, fasteners and disconnect tube 1 connecting the compressor to the evaporator (short part) and tube 2 connecting the condenser to the evaporator from the evaporator unit.
Installing plugs on the tubes
During these operations, the tubes must not be damaged!
Remove the instrument panel, described in the article - How to remove the instrument panel Lada Largus
We remove the heater, as described in the article - Repair of the heater and ventilation system of the car Lada Largus
Remove the heater fan
Using a Torx T-20 wrench, unscrew two self-tapping screws
Remove the radiator tube holder
Use the Torx T-20 key to unscrew the screw
Remove the heater radiator tubes
Using the Torx T-20 key, unscrew the self-tapping screw and wring out the three latches
Remove the heater core
Using a Torx T-20 wrench, unscrew the three screws at the bottom of the heater
Unscrew the two screws on the left side of the heater with the same tool
We unscrew the self-tapping screw located in the recess below the additional resistor of the heater fan
Unscrew the screw in front of the heater
Press the two latches in the front
We press one latch at the back of the heater
Disconnecting the left and right parts of the heater body
Having peeled off the foam seal, remove the evaporator shield
Remove the evaporator from the right side of the heater body
Unscrew the two screws with a 4 hexagon
Remove the plate and reducer
The evaporator tubes are sealed in the reducer with rubber rings
If the rings are deformed, then replace them
Install the evaporator in reverse order
In this case:
- - before installation, add compression oil to the evaporator in the amount according to the table in the article - How to unload and load the refrigerant of the Lada Largus air conditioning system;
- - before installing the evaporator unit, we replace the sealing rings with new ones. We apply compressor oil Sanden SP-10 on the o-rings;
- - tube bolt tightening torque 8 Nm
After that, you need to evacuate the system and load the R134a refrigerant, the load rate is 475 ± 35g.
Check the air conditioning system for refrigerant leaks and check the system's performance.
Air conditioner evaporator maintenance
In the evaporator, when the air conditioner is operating, moisture from the air condenses, and in dampness, fungus spores, molds and dangerous microbes quickly multiply. All this can cause respiratory diseases in humans.
To reduce the risk to health, it is recommended to clean the vaporizer once a year.
To perform the work, you will need a product for cleaning the car air conditioner with an extension hose, a compressor.
To prevent damage to the radiator, do not apply air pressure higher than 3-4 bar during the following operation.
Purge the radiator of the cooling system and the condenser from the side of the engine compartment with compressed air from the compressor.
Through the grilles of the radiator and bumper, we wash the condenser from the outside with water under minimal pressure so as not to damage its cells.
Blow the condenser again with compressed air.
This procedure only works if performed regularly.
In some cases, you have to repeat the procedure several times, especially if the condenser has not been cleaned for a long time.
To make it easier to work, you can remove the front bumper.
If the condenser is very dirty (when, for example, it is clogged with hardened dirt), the radiator of the cooling system can be removed.
It is allowed to wash the dirt from the condenser cells with a soft paint brush.
We vigorously shake the bottle with the preparation for cleaning the air conditioner and, holding the bottle vertically, we process the evaporator with foam through the condensate drain tube.
People and pets must be kept out of the vehicle during the following operation!
Starting the engine.
Turn on the air conditioning system, set the maximum speed of rotation of the electric fan of the air conditioner and close all windows.
We leave the car interior and close all doors for 10 minutes.
After 10 minutes, turn off the engine and ventilate the interior.