ENGLISH
9
ENGLISH
R
S
T
W2
U2
V2
W1
V1
U1
W2
U2
V2
W1
V1
U1
R
S
T
230 V
400 V
W2
U2
V2
W1
V1
U1
R
S
T
400 V
Eccentric reduction cone for pump uptake.
Concentric reduction cone for pump drive.
The following diagram must be observed:
Never start the pump with the stop valves closed, as this would increase the temperature of the liquid and steam bubbles
would form in the pump, causing mechanical damage. If possible, install a by-pass or discharge circuit linked to a liquid
recovery tank.
11. ELECTRICAL CONNECTION
Warning: Always observe safety regulations!
Rigorously respect all circuit diagrams appearing inside the junction box and those appearing in this manual.
Electrical connections must be performed by an expert electrician with the necessary requirements established by current
regulations
Rigorous compliance must be made with the indications of the electricity supply Company.
THE CURRENT MUST BE TURNED OFF before entering the junction box to start the pump.
The system must be protected by a differential switch (Ifn=30ma).
In the case of triple phase motors with star-triangle starters, we must ensure that the time of commutation between the start
and the triangle be as short as possible (for Powers to 40 HP
≤
3 sec )
Check the mains voltage before making any connection. If the voltage corresponds to the voltage that appears on the plate,
connect the cables to the junction box with priority for ground.
MAKE SURE THAT THE GROUND INSTALLATION IS EFFECTIVE AND THAT SUITABLE CONNECTION
MAY BE UNDERTAKEN.
Pumps must always be connected to an external switch.
Motors must be protected with suitable motor protection, carefully calibrated with respect to the current appearing on the
plate.
Should the protection fuse of a triple phase motor be activated, it is recommendable to change the other two fuses
alongside the one that has blown.
Connection diagram
L = 2 times the pipe diameter
M = 10 times the pipe diameter
Tank
Stop valve
Eccentric cone
Stop valve
Return pipework
Concentric cone
Manual instalació CF-2, BR-2, CF-4, MAGNUS CR, CRB, NKM, NKP, KONTRA_SACI - juny 2016 20/06/16 07:13 Página 9
