Maico EZR B Series, Mounting And Operating Instructions, Page: 17 / 38

4. Product information │ UK
15
● Reversing mode permitted. Flow rate in
opposite air flow direction reduced by
around 35 %. For reversing switch
 Internet or catalogue.
● Thermal properties of fan designed for
continuous operation. The fan motor may
heat up impermissibly if the direction of
rotation is changed frequently.
● EZR units (single-phase AC models) with
capacitor motor Capacitor in the terminal
box is ready to be connected.
● Thermal overload protection as standard.
Exception: On request for DZR 25/4 D and
pole-changeable units.
4.3 Thermal overload protection
The fan motor has thermal protection
(temperature sensor in the motor winding).
The overload protection automatically
switches off the fan via the external control
device in the event of overload (overheating).
Exception: Pole-changeable units and
DZR 25/4 D.
The fan must remain switched off long enough
for the motor and temperature limiter to cool
down, before starting the fan back up. Depen-
ding on size and temperature conditions, it
may take
up to 30 minutes to cool down.
Only switch unit on after this.
EZR …
Potential-free terminal connections, which
must be connected to e.g. an MVE 10 motor
protection switch or the control circuit of a
contactor circuit. The MVE 10 is not suitable
for EZR 25/4 D, EZR 30/6 B and EZR 35/6 B
units.
DZR ...
Potential-free terminal connections, which
must be connected to e.g. an MV 25 motor
protection switch or the control circuit of a
contactor circuit.
Pole-changeable units DZR … and
DZR 25/4 D
Overload protection with a motor protection
switch provided by the customer must be
ensured for pole-changeable units. Use an
optional pole changing switch, e.g. MAICO
pole changing switch P1 or WP1, to change
over the speed.
5. Operation: Switching on/off
The fan is switched on or off with a switch
that is to be provided by the customer.
The speed of EZR units can be controlled
steplessly with an optional speed controller.
EZR/DZR units can be switched in steps
using an optional 5-step transformer.
Ensure sufficient air supply during operation.
6. Technical data
For technical data,  the rating plate.
● For rating plate  the fan or these
instructions.
● For dimensions and characteristic curves
 catalogue or Internet.
● Internet  maico-ventilatoren.com or
QR code on the fold-out page.
Degree of protection
IP 55
*
Exception: IP 54 for
EZR/DZR …
D
Air volume, free outlet
or free inlet 500 to 14,800 m³/h, de-
pending on unit variant
Weight 5.7 to 41 kg, depen-
ding on unit variant
Maximum air flow
temperature 40 °C
*
IP 55 protection only guaranteed in hori-
zontal installation position or, in the case
of vertical installation, with downward air
flow.