ED 3 M HS - DAB Pumps S.p.a.

ENGLISH
8.3 Electrical connections
8.3.1 Before connecting the power cables to line input terminals L1-N, ensure that the main switch on the power
distribution panel is in OFF position (O), and that no one can switch on the power accidentally.
8.3.2 Scrupulously observe all the regulations in force concerning safety and accident prevention.
8.3.3
Ensure that all the terminals are fully tightened, paying particular attention to the earth terminal.
8.3.4 Connect the cables to the terminal board as indicated in the wiring diagrams given in the enclosed booklet.
8.3.5 Check that all the connecting cables are in excellent condition, with the external sheathing unbroken.
8.3.6 Check that the differential switch that protects the system is of the right size.
Provide automatic protection of the supply line against short circuits by means
of the Curve C 16A Automatic Switch for panel type ED 1,3 M and 20 A for
panel type ED 3 M, ED 3 M HS.
8.3.7 The apparatus must be correctly and safely earthed as required by the
regulations in force.
8.3.8 Depending on the type of installation, limit the maximum length of the power cable as follows:
Panel model Max. line length ( m )
( section 1.5 mm 2 Max. line length ( m )
) ( section 2.5 mm 2 Max. line length ( m )
)
( section 4 mm 2 )
ED 1,3 M 15 30 45
ED 3 M 10 20 30
ED 3 M HS 10 20 30
8.3.9 Instrumental checks to be carried out by the installer:
a) continuity of the protection leads and of the main and supplementary equipotential circuits;
b) insulation resistance of the electric system;
c) test efficiency of the differential protection;
d) test the applied voltage;
e) test operation as indicated in point 8.5.
8.4 Supplying power to the control panel
After having correctly performed the steps described above, close the inner door of the panel, tightening the three
screws provided, turn the magnetothermal switch ref. QM1 to position 0. Supply power to the control unit, switching on
the main switch on the distribution panel. Turn on the isolating switch ref.. QS1. The electropump is not fed.
8.5 Starting the system
1. Ensure that the external commands (floats or thermostats) are in OFF position (command excluded).
2. Press the button ref.SB1 in MAN position. The electropump is fed as long as it is held down.
�� For systems with one float the start command is given by the float ref. A (the float ref. B must be jumped.
�� For systems with two floats, the start command is given by the maximum level float (connected to the terminals
ref. B) and the stop command by the minimum level float (connected to the terminals ref.A).
Avoid starting the system, turning the isolating switch (ref. QS1) with the switch ref.
QM1 in position I.
8.6 Alarm system
1. Check correct operation of the alarm float connected to the terminals ref. P (n°25-26).
2. With the alarm float in ON position check correct operation of the remote alarm connected to the terminals Q
(n°31-32), remembering that the contact as supplied in the standard version has no potential.
N.B.: The feeding circuit of the alarm system must be provided with a PELV safety circuit (CEI
EN 60204-1). Otherwise, ensure that the earth lead of the float is connected to the terminal
8.7 Using the panel to feed in-line circulating pumps
ED 1,3 M:
- Connect the circolator in L1-N of P1
- Make bridge 3-4 of B
- Connect the thermostat in 1-2 of A
ED 3 M:
- Connect the circolator in C-P of P1
- Make bridge K-K of P1
- Make bridge 3-4 of B
- Connect the thermostat in 1-2 of A
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