Maico ESR 12-2 Montage- Und Betriebsanleitung Seite 9

3.1 Equipment overview ESR.. S
and DSR.. S unit, Fig. A
1 Housing
2 Angle plate
3 Terminal box with cable screw-
connections
4 Coupling
5 Clip-locks
6 Housing cover
7 Cover
8 Impeller
T Rating plate with air direction arrow
3.2 Product description
Sound-insulated ventilation box. Very quiet
operation, thanks to double-wall, sound
insulated housing. With statically and
dynamically balanced centrifugal impeller:
● ESR.. S impeller with blades folded back-
wards for optimum efficiency.
● DSR.. S impeller with blades folded back-
wards for optimum efficiency.
● ESR.. EC impeller with blades folded back-
wards for optimum efficiency.
● ESR.. impeller with blades folded forwards.

The motor is designed for continuous
operation.
● 230 V model = ESR.. S, ESR.. EC and
ESR.. units
In the event of thermal overload, the motor
overload protection switches the unit off.
● 400 V model = DSR.. S units
Potential-free terminal connections, which
must be connected to a Maico MV 25
protective motor switch or the control circuit
of a contactor.
● On and Off is to be carried out using a
separate switch (this should be supplied
by the customer).
● ESR.. S and ESR.. units are speed
controllable. See recommended Maico
accessories for speed control.
● ESR.. EC units are speed controllable
through a 0...10 V signal potentiometer,
e.g. Maico ST-EC.
3.3 Intended use
● Supply of small to medium air volumes at
high resistances.
● For ventilation or air extraction (depending
on installation direction) of commercial
premises, showrooms, offices, conference
rooms, changing rooms.
● Can also be used as air extraction system
for machine areas or workspaces.
● For surface mounting indoors.
● For direct installation in ventilation ducts.
Any installation position. It must be
possible for the housing cover to be
removed and the fan unit to be cleaned.
● Connection on the inlet and outlet side with
nominal sizes Ø 125 to Ø 400, depending
on unit type.
● ESR.. EC: Speed setting is allowed with
the control units listed in the current Maico
range; see Maico catalogue or the Internet.
3.4 Predictable misuses
Maico is not liable for damages caused by
use contrary to the intended purpose.
Under no circumstances should the unit
be used:
● for conveying greasy air.
● if the intake opening or ducts are blocked.
● close to flammable materials, liquids or
gases.
● for conveying chemicals, aggressive gases
or vapours.
● in areas subject to explosion hazards.
● in combination with a frequency converter.
GB
9