Trouble Shooting; Single Phase Wiring Connection; Max Lenght Cables - DAB 150T Installations- Und Bedienungsanleitung

eng
8 Operating troubles
Troubles
The pump starti and a)
stops.
b)
c)
The pump fails to a)
deliver or the b)
discharge flow is too c)
small,
d)
Pump starti too often. a)
b)
c)
9

Single phase wiring connection

10 Cables lenght
Diver Model Sect. mmq
75
100
Max. lenght
150
200
Cause
Incorretct voltage or voltage drop.
Open-circuit in motor power cord.
The motor protection trips out.
Voltage low.
Suction strainer clogged.
Wrong direction of rotation (three-
phase motor).
No water in borehole, or level too
low.
Differential on pressare-sensitive
switch too small.
Float or electrodes (PMS)
incorrectly placet.
The bladder tank is too small or is
insufficiently pressurized.
Nero
Black
Grigio
Grey
Marrone
Brown
Giallo/verde
Yellow/Green
1 1.5
40 60
30 45
20 35
10 25
a) Check the voltage durino starting; if the cable cross-section is too
small, the voltage drop may be such that the motor cannot function
normally.
b) Measure the resistance between phases. Refit the pump if
necessary and check the cable.
c) Check the current settino on the thermal relay and compare it to the
indicated value. Important: do not insist if the relay trips out
repeatedly (try to locate the cause); forced operation of the unit
could damage the motor (by overheating) in a very short time.
a) Check the supplì voltage at the box.
b) Refit the pump: unclog and clean.
c) Interchange two phase wires at the box.
d) Check the level; it must be at least 150 mm above the pump
strainer (with pump running).
a) Increase the Stop/Start difference.
b) Ad just the distance between them so that the time between the
stopping and starting of the pump reasonable.
c) Chek and ad just the pressures (On/Off). Chek the pressure in the
tank. Add a tank to increase capacity or change the tank.
1
T
2
3
C
1- Comune-Common
2- Marcia-Main
3- Avviamento-Auxiliary
C- Condensatore-Capacitor
T- Termico-Thermic relay
2.5
100
70
55
40
Remedial action
L1
N
8