Maico EZR B Series, Mounting And Operating Instructions, Page: 16 / 38

UK │ 3. Safety instructions and warnings
14
Danger if the relevant regulations
for electrical installations are not
observed.
 Before installing the electrics, shut down all
supply circuits, deactivate the mains fuse and
secure it so it cannot be switched back on.
Attach a warning sign in a clearly visible place.
 Be sure to observe the relevant regulations
for electrical installation; e.g. EN 50110-1, in
Germany this is particularly VDE 0100, with
the corresponding parts.
 A mains isolation device with contact
openings of at least 3 mm at each pole is
mandatory.
 Only connect unit to a permanently wired
electrical installation with type NYM-O/NYM-J
(3 x 1.5 mm² or 5 x 1.5 mm²) cables.
 The units may only be operated using the
voltage and frequency shown on the rating
plate.
 Make electrical connections according to
wiring diagram.
 The degree of protection stated on the
rating plate is only guaranteed if installation is
undertaken correctly and if the connection
cable is correctly guided through the cable
grommet into the terminal box. The grommet
must tightly seal the cable sheathing. The
terminal box cover must be correctly fitted, so
that the surrounding sealing has close contact
all the way around the terminal box IP 54/IP 55
only guaranteed in horizontal installation
position or, in the case of vertical installation,
with downward air flow direction.
 With protection class I, connect the PE
conductor and check the connection.
 Check protective-conductor opening on
housing.
 Unit may also be energized even when at
a standstill and may be switched on automa-
tically by sensors (time delay, humidity etc.) or
by the thermal protection in the motor winding.
Maintenance and fault finding only permissible
when carried out by trained specialists.
Risk of death from carbon monoxide
when operating with air-ventilated
fireplaces. Ensure sufficient supply air intake
during operation with air-ventilated fireplaces.
The fans may only be installed in rooms,
apartments or residential units of a compa-
rable size, in which air-ventilated fireplaces
are installed if:
● a parallel operation of air-ventilated
fireplaces for liquid or gaseous fuels and the
air-extracting equipment can be prevented
via safety devices, or
● the extraction of exhaust gas from the air-
ventilated fireplaces is monitored by special
safety equipment.
Exercise caution when handling
packaging materials.

Observe applicable safety and accident
prevention requirements.
 Store packaging material out of the reach
of children (risk of suffocation).
4. Product information
4.1 Unit versions
● EZR ... B and EZR 25/4 D: Single-phase
AC models 230 V, 50 Hz
● DZR ... B and DZR 25/4 D: Three-phase
AC and pole-changeable three-phase AC
models 400 V, 50 Hz
4.2 Product description
● Duct fans in nominal sizes Ø 250 to Ø 600.
● Any installation position. Air extraction or
ventilation, depending on installation
position.
● The speed of EZR/DZR fans can be
controlled. Exception: The speed of the
DZR 40/2 B cannot be controlled.