Checking Direction Of Rotation; Switching The Pump On; Switching Frequency; Maintenance - Biral EBZ Série Notice De Montage Et D'utilisation

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– Close the stop valve on the pressure side of the
pump and open the stop valve on the suction side
completely.
– Loosen the vent screw (LV).
– Then remove a plug from one of the pump flanges
(depending on the position of installation of the
pump, the plug must be higher than the LV).
– Fill the medium through the filling opening until
the suction line and the pump are completely filled.
– Screw the plug in again and tighten it and then
tighten the vent screw.
The suction line can be partially filled and
Caution
vented, if possible even before the instal-
lation of the pump. In addition, a filling
device can be fitted before the pump.
9.2 Checking the direction of rotation
Before the direction of rotation is checked,
Caution
the pump must be filled with the pumping
medium and vented.
The correct direction of rotation is indicated by
arrows on the fan cover of the motor. Viewed from
the fan, the pump must rotate in clockwise direction
(to the right).
– Switch the pump on briefly and check the direction
of rotation. If necessary, change the phases on
the electrical feed.

9.3 Switching the pump on

– Before switching the pump on, the stop valve on
the suction side of the pump must be opened
completely. The stop valve on the pressure side
of the pump should only be partially opened.
– Switch on the pump.
– When the pipe system has been filled with the
pumping medium, the stop valve on the pressure
side of the pump should be slowly opened
completely.
If the pump was equipped with a motor
Caution
of lower power because of a planned
restriction of pumping flow, ensure that
this value is not exceeded. Otherwise the
motor will be overloaded. The same applies
in the case of single operation of a twin
pump designed for parallel operation. You
may be able to measure the differential
pressure in order to ensure that the
pressure conditions are correct.
– Measure the max. motor consumption in amps
and compare the value with the rated current on
the motor rating plate.
– Throttle the stop valve on the pressure side of the
pump until the current consumption corresponds
to the value given on the motor's type plate.

9.4 Switching frequency

Motors smaller than 4 kW: max. 30 switchings
per hour.
Other motors: max. 15 switchings per hour.

10. Maintenance

Before beginning maintenance work, the
Caution
pump must be taken out of operation,
completely separated from the mains
supply and prevented from being switched
on again.
Work only to be done
by specialist personnel!

10.1 General

Each time before dismantling, close off the suction
and pressure side, unscrew fuses and empty the
pump.

10.2 Dismantling the pump insert with motor

(Figure 15.3/15.4)
Undo the screws (Item 11). Lift out complete insert
with motor.
Assemble in the reverse order.
The motor block with larger motors from 4 kW is
expediently lifted out using a block and pulley.
Before lifting, the insert is loosened with the aid of a
wedge or lever which is placed between the pump
casing (Item 1) and/or pump cover (Item 3)
(see Sections 15.3 to 15.4).

10.3 Aligning the pump shaft

If the motor was separated from the pump during
assembly or during a repair, the pump shaft must be
aligned after installation of the motor, as follows:
Check the concentricity of the motor shaft with a dial
gauge. The maximum shaft deflection at the front
impeller seat may be 0.05 mm.

10.4 Changing the mechanical shaft seal

(Figure 15.3/15.4)
Remove the pump insert as described in Section
10.2. Then loosen the hexagon bolt (Item 25) or nut
(Item 13) and remove disc (Item 24), impeller (Item 2)
and wedge (Item 15). Remove packing ring of the
mechanical shaft seal from the shaft sleeve (Item 5)
and from the shaft and counter-ring in the pump
cover (Item 3). If the shaft sleeve (Item 5) is eroded
in the region of the seals, it should be replaced.
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