Biral HX 502-1 [27/60] English

6.4 Deblocking

Switch pump off.

Shut the stop valves before and after the pump.

Risk of burning if the pump is touched.

Pump and motor can be very hot.

Depending on the operating pressure

(sealing, slide valve), the pump rotor can become

blocked.

On pumps with a screw plug, check the shaft’s

direction of rotation.

There is a risk of scalding

Depending on the temperatur and system pressure, hot pump

medium can escape in the form of liquid or steam.

Warning

There is a risk of scalding

Depending on the temperature and system pressure, hot pump

medium can emerge in the form of liquid or steam.

- Never remove the screw plug completely –

the pump can suck in air.

Powerful escape of liquid.

- Switch the pump on and off 5 to 8 times until

only water emerges at the screw plug.

- Tighten screw plug.

- Increase system pressure again

- Switch pump on.

6.3 Deaerating

Deaeration of the pump, in particular the motor area, is

implemented automatically after a short period of operation.

However, if very rapid deaeration is required, proceed as follows:

- Switch pump off

- Reduce system pressure to 0.5 bar

- Release the screw plug so far

(approx. one turn in an anti-clockwise direction)

until water emerges.

english

After undoing the screw plug (water emerges through

the bearing clearance) deblock the rotor shaft with a screwdriver.

Rotate the shaft end until the resistance decreases.

Fit screw plug.

Open the stop valves before and after the pump.

Switch pump on.