DAB NKV 1 Instructions De Mise En Service Et D'entretien page 21

Three-phase motors must be protected with an automatic switch (e.g. circuit breaker) calibrated at the values shown on the data
−
plate of the electropump.
In the case of three-phase motors with star-delta start, ensure that the switch-over time from star to delta is as short as
−
possible.(see table B, page 106).
In electropumps the terminal board may face in four different positions: slacken and remove the four retaining screws
between the motor flange and the support. Turn the motor into the desired position and replace the screws.
7.6 Starting
In accordance with accident-prevention regulations, the pump must be run only if the coupling (where provided) is suitably
protected. So the pump must be started only after having checked that the coupling protections are correctly fitted.
To obtain priming, proceed as follows: NKV (Fig.7):
Before filling the pump through the filling hole you must first partially unscrew the drainage pin/cap (when filling just unscrew it
−
by 3 or 4 turns) without forcing it.
After having removed the cap, fill the pump slowly through the filling hole so as to discharge any air pockets present inside.
−
Before starting the pump, close the filling cap and screw the drainage pin/cap all the way, without forcing it.
−
Vent by means of the screw on the part opposite the filling cap, as indicated in Fig. 7
−
Fully open the gate valve on intake and keep the one on delivery almost closed.
−
Switch on and check that the direction of rotation is correct, as indicated in Fig. 2, page 1. If not, invert any two phase leads,
−
after having disconnected the pump from the power mains.
Once the hydraulic circuit has been completely filled with liquid, gradually open the delivery gate valve until its maximum
−
opening.
With the pump running, check the supply voltage at the motor terminals, which must not differ from the rated value by +/- 5%.
−
With the unit at regular running speed, check that the current absorbed by the motor does not exceed the value on the data
−
plate.
DRAINAGE CAP
ENGLISH
FIG. 7
FILLING
CAP
NKV 1-3-6-10
18
FILLING
CAP
DRAINAGE
CAP
NKV 15-20-32-45-65-95
VENT SCREW
DRAINAGE
CAP