30
Pictures for illustrating purposes only
ELECTRICAL CONNECTIONS
Failure to observe manufacturer’s installation recommendations will invalidate the manu-
facturer’s warranty.
Nota: for connecting optional ventilation pack or humidistat, please refer to pages n°21 & 40
of this manual.
3
2
L2
L1
N
L3
L
P
E
Series
EHU-750
Q1: 2 poles
2A
3 x 380V /
3 x 400V
50-60Hz
220-230V
50-60Hz
Q2: 3 poles
C) 3 neutral: 3 x 380-400 V
B) 3 X 380-400 V without neutral
L2
L1
N
L3
L
P
E
Series
EHU-750
3x380V
3x400V
50-60Hz
+ neutral
Q2: 4 poles
D) 3 phases without neutral: 3 x 380-400 V
In this case, a transformer (option) must be ins-
talled (See technical notice page n°33)
All works concerned with electrical installation must be carried out by a skilled and
qualified personnel.
Make sure that all incoming power supplies are isolated before installation and
maintenance of the EHU-750 humidifier.
1 - Power supply isolator and MCB ( near the unit )
2 - Power supply cable
3– Electrical compartment
WARNING :
Failure to fit an electrical power isolator and MCB as
part of the electrical installation significantly increases
the risk of electric shock, which can be fatal.
Q1 and Q2: MCB and electrical power isolation
The symbol Δ between Q1 & Q2 means that
these MCB are coupled. The power MCB Q2
and control MCB Q1 are mechanically linked
together. So if a fault is detected, the power and
the control circuits are switched off and there is
no voltage on the unit. The unit is really off
voltage.
ALL WORKS CONCERNED WITH ELECTRICAL INSTALLATION MUST BE CARRIED OUT BY A SKILLED AND QUALIFIED PERSONNEL
1
A) 2 x 220-230V
L3
L2
L
N
P
E
EHU-752
EHU-753-10
Q2: 2 poles
220 V /
230V
50-60Hz
L1
L
N
N
SERIES EHU-750 HUMIDIFIER
Installation - Step 5