IMP Pumps GHN(M)(D)basic(auto) & SANbasic 40-100 flanges - Manual (Page 16)

-16-
GB
- 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. 3), attached on the bottom of motor cover. Before doing that unwind the
upper cover (Fig. 1 - POS. 2).
Fig. 3
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.1-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.
The red flash lamp conveys the error number. After a sequence of flashes a longer interval
proceeds and the number of flashes between two intervals indicates the error code.
During the operation and with high temperatures of the pumping fluid the pump
will warm up. Do not touch the pump! Danger of burns!
6.2 Setting the speed for the pumps GHN, GHND, GHNM,
GHNMD ( basic)
Each pump is able to cover the areas of three hydraulic characteristics. To achieve this,
it has an inbuilt electric motor with three different revolution speeds. For achieving the
selected characteristics or speeds , the pump has a push button (Fig.1-POS.
4), with which we change speeds.