Venting air from the low temperature circuit

AR20.00-P-1145H

Venting air from the low temperature circuit

4.6.13

ENGINE

275, 279, 285

6

Venturi nozzle

7

Pressure tube

M

Connection

U

Connection

Vacuum-type cooling system filler with low-temperature circuit (NTKL) adaptation

1

Vacuum box

2

Switches

4

Coolant reservoir

5

Control unit

6

Venturi nozzle

A

Connection

B

Connection

C

Valve

D

Valve

E

Coolant drain

F

Connection

G

Connection

H

Valve

Prepare bleeding: line routing shown on model 230

1

Vacuum box

A

Connection

J

Coolant feed point

4

Coolant reservoir

B

Connection

S

Waste air hose

5

Control unit

E

Coolant drain

Z

Compressed air

6

Venturi nozzle

F

Connection

Perform bleeding: line routing shown on model 230

1

Vacuum box

E

Coolant drain

S

Waste air hose

5

Control unit

G

Connection

U

Connection

6

Venturi nozzle

J

Coolant feed point

Z

Compressed air

 Danger !

Risk of injury to skin and eyes suffering scalding from contact with hot coolantspray. Risk of poisoning from swallowing coolant.

Do not open cooling system unless coolant temperature is below 90 °C. Open cap slowly and release the pressure. Do not pour coolant into beverage containers.
Wear protective gloves, protective clothing and safety glasses.

AS20.00-Z-0001-01A



Notes on coolant

AH20.00-N-2080-01A

1.1

Connect diagnostic system in order to actuate circulation pump for low-temperature circuit

Model 216, 221



ENGINE 275 in MODEL 216, 221

AD00.00-P-2000-04A

 Only conduct ventilation procedure on a cold engine

1.2

Prepare actuation of circulation pump for low-temperature circuit

ENGINE 275, 285

MODEL 215, 220

AR20.00-P-1145-01M

MODEL 230

AR20.00-P-1145-01R

MODEL 240

AR20.00-P-1145-01H

 Only conduct ventilation procedure on a cold engine

 Cooler vacuum filling device

*285589002100

 NTKL Adaption

*285589012100

2

Screw on the connection (M) at the pressure tube (7) of the venturi nozzle (6)

 The venturi nozzle (6) will lose its function if used without the pressure tube (7). The venturi nozzle (6) does not generate a vacuum, but creates excess pressure at connection (U) if the compressed air is connected without the pressure tube (7).

 When first assembling the venturi nozzle (6) connection (M) on the workshop equipment compressed air system must be closed.

3

Fill coolant reservoir (4) with coolant

 20 liter

4

Open low-temperature circuit at filler neck and screw on tester cap

 Cooler vacuum filling device

*285589002100

 ENGINE 279
Test cap

*210589009100

 ENGINE 275, 285
Test cap

*124589009100

5

Empty vacuum box (1)

6

Prepare low-temperature circuit for bleeding and check for leaktightness

AR20.00-P-1145-02R

7.1

Bleed low-temperature circuit using circulation pump and vacuum

ENGINE 275, 285

AR20.00-P-1145-03R

 ENGINE 275, 285
Test cap

*124589009100

7.2

Carrying out the bleeding process for the low-temperature circuit

ENGINE 279

AR20.00-P-1145-03R

 ENGINE 279
Test cap

*210589009100

8

Close off vacuum-type cooling system filler

 Close off connections (A, B) and close diagnostic sockets for low-temperature circuit.

 Cooler vacuum filling device

*285589002100

9

Unscrew test cap and close off low-temperature circuit

 ENGINE 279
Test cap

*210589009100

 ENGINE 275, 285
Test cap

*124589009100

10.1

Close off diagnostic system

MODEL 216, 221



AD00.00-P-2000-04A

10.2

Replace switch (2) for manual actuation of the circulation pump against a relay

MODEL 215, 220, 230, 240