CLAS AC 1020 Manuel - Page 14

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AC 1020

COOLING SYSTEM FILLING/DRAINING DEVICE

STEP 2: LEAKAGE CONTROL

• Before starting the filling process, it is important to check that the system is properly

sealed. To do so, hold the vacuum in the circuit for a few seconds. If the needle of the

pressure gauge on the waste fluid tank rises, there is probably a leak in the circuit. If the

needle remains in place, you can close the suction valve of the Y-adapter (Fig. 2) while

leaving the cone in place in the vessel for filling.

STEP 3: FILLING OF THE CIRCUIT

ATTENTION: If the filling is not done immediately after the draining (open

circuit cold engine), it will be necessary to put the circuit under vacuum

beforehand. To do this, follow the instructions in steps 1 and 2 again.

• To begin the operation, open the filling valve (orange hose) (Fig.9). Set the "Air flow" valve

to "Pressure" and the "Tank" valve to "New" (Fig.8). To avoid accidentally pressurizing

the system, the pressure exerted will be limited by the device to 0.5bar.

The operation should take between 3 and 5 minutes.

• When all the new fluid in the tank has been transferred to the system, close the filling

valve and turn the two valves on the front panel to OFF (Fig. 1 and Fig. 2).

STEP 4: LEVELING THE EXPANSION TANK

• Remove the cone from the expansion tank and carefully place it on its holder. Replace

the cap on the expansion tank. Start a purge phase by starting the installer and letting

it run until the fan starts. Then check the fluid level in the expansion tank and adjust the

level if necessary with the machine or with a pitcher.

The replacement operation is complete.

Filling

hose

Open

Fig. 8

Drain

hose

Closed

Fig. 9