Electrical Connection Of Pumps; Start Up Loading And Deaeration - IMPPUMPS GHN Serie Montage- Und Wartungsanleitung

5.2 Electrical mains connections
GHN (basic, auto), GHND (basic, auto) pumps are provided with built-in, three
phase electric motor, to be connected with A.C. mains of 3~400 V, 50Hz.
GHNM (basic, auto), GHNMD (basic, auto) type pumps have built-in, single
phase electric motor 1x230 V, 50 Hz.
The motor is internally protected with bimetal switch. The electric motor
have a built-in, thermal cutout, that will switch off the electric motor when it is
overheated.
The fuse for isolation of all poles from the mains should be incorporated in
accordance with the national electrical installation standards.
The motor protection switch Iskra MIS MS 25, Schrack ALEA or similar switches
are appropriate fuses.
The connecting wire has to be connected over a cable entry M20 (Fig.2 –
POS.7).
- All water connections must be installed at a level at which the pipeline and/or hydraulic
casing of the pump and/or motor casing are not flooded.
- Check that the mains voltage agree with the particulars stamped on the rating plate.
- Fuse on the side of mains: please refer to the rating plate.
- The pump / system must be earthed (grounded) in accordance with the appropriate
standards.

5.2.1 Electrical connection of pumps

Electrical connections of the pump must be carried out in accordance with the wiring
diagram (Fig. 4), attached on the bottom of motor cover. Before doing that unwind the
upper cover (Fig. 2 - POS. 2).
6. S
tart up
6.1 Loading and deaeration
In the pumps of types GHN (basic auto), GHND (basic, auto), GHNMD (basic, auto),
GHNMD (basic, auto) the rotor is submerged and provided with special water-lubricated
bearings. Before putting the pump into operation, it has to be filled with water and
deaerated. Deaerate the pump by unscrewing a screw on the back side of the electric
motor (Fig.2-POS.5). Air will flow out through the cleft between the motor shaft and the
bearing. When water starts to flow out, close the valves at both the suction and pressure
side of the pump. Start the pump and check the direction of shaft rotation. In case of a
wrong direction a built-in flash lamp will start to blink with red light.
The pump is also provided with other detectors for identifying errors, listed in the table below.
All manuals and user guides at all-guides.com
Fig. 4
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