Biral MX 12-3 [19/56] English

Install stop slide valve before and after the pump.

This will avoid having to drain and refill the system

if the pump has to be replaced.

4.4 Position

of the terminal box

The delivery position

is position A, (corresponds

to assembly position F, K)

The arrow on the pump

housing indicates

the direction of flow.

The motor shaft always

has to be horizontal,

never vertical.

The terminal box must

not point downwards

(M,N,O,P) as otherwise

water may penetrate easily.

Before installing the pump,

the terminal box can be

turned by 90° in each case.

To do this, undo the casing’s

4 screws and turn the motor

head to the required

terminal box position.

Do not shift or damage

the seal between the motor

and pump casing.

After inserting the screws,

tighten them up diagonally.

4.6 Return valve

If a return valve has been installed, the pump has to be set up

(see point 6.4) so that the pump’s minimum delivery pressure

can exceed the valve’s closing pressure at any time.

english

4.5 Minimum pressure

At 75 °C, the minimum pressure at the pump intakes for reliable

lubrication of the sleeve bearings:

MX 10, MX 12, MX 13, M14, M15, SX12, SX13, SX15 0,1 bar

The values apply up to 500 m (1640 ft) above sea level.

Additional pressure for greater heights:

0.01 bar per 100 m (328 ft) additional altitude.

Additional pressure for: 90 °C 0.35 bar

110 °C 1.10 bar