Motor Operating Instructions; Fault Finding Chart - Lowara TDB Série Instructions Pour L'installation Et L'emploi

Installation, Operating and Maintenance Instruction

10. Motor Operating Instructions

The following instructions must be followed
exactly, to guarantee
installation, at the operation and at the
maintenance of the motor. All persons should
be directed to the present manual which is
performing these tasks. The neglect of the
instructions can
guarantee.
Electrical connections
Make sure that the rated voltage corresponds to
the supply voltage.
Ground the pump before making any other
connection.
We recommend
differential switch (30 mA) be installed as extra
protection against lethal electric shocks in the
event of faulty grounding.
Connect the pump to the mains using a multiple-pole
switch or other device
disconnection (interruption of all the supply wires) from
the mains, with a contact separation of at least 3 mm.
Remove the terminal board cover by first removing the
screws.
Carry out the connections as indicated on the back of
the terminal board cover, and as shown in fig. 3 - 4.
The single-phase version has a built-in overload
protection; the three-phase version must be equipped
by the user with a magneto-thermal switch or
magnetic starter with overload and undervoltage
protection, a thermal relay and fuses installed
upstream.
The overload relay must be set to the motor current
rating. The thermal relay may be set to a current value
slightly lower than the full load value when the electric
pump is definitely underloaded, but the thermal
overload protection must not be set to current values
higher than the full load values.
Checking the rotation direction of electric pumps
with three-phase motors.
The direction of rotation may be checked before the
pump is filled with the liquid to be pumped, provided
it is run for very short starts only.
The pump must not be run until it is filled with
liquid.
Continuous dry running will damage the
mechanical seal beyond repair.
If the direction of rotation is not anti-clockwise when
facing the pump from the suction side interchange two
supply leads.
TDB, TDV
the safety at
cause the loss of
that a high sensitivity
ensuring multiple-pole
page 67

Fault finding chart

the
PROBLEM
1. The pump doesn't
start
the
2. Overload protection
trips:
– accidentaly
– systematically
Model TDB, TDV
PROBABLE CAUSE POSSIBLE
REMEDIES
A) No electrical power A) Supply electrical
B) Blown fuses: power
B1 Because B1 Replace fuses with
inadeguate (blowing adequate ones
current too low) B2 Repair the motor
B2 Because the motor or replace the cable
or the supply cable C)Reset the protection
are damaged (if it trips again see
C) Overload protection problem 2)
previously tripped
A) Momentary loss of
a phase
C) Incorrect setting C) Set to rated current
D) The pump's D) Close the delivery
delivery is higher than valve until the capacity
the rated one returns to the rated
E) Dense and viscous value
liquid E) Determine the
actual power
requirements and
replace the motor
accordingly
Revision 01
Issue 06/2012