Maico DZR 25/4 D, Mounting & Operating Instructions, Page: 7 / 16

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Operating conditions
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Installation location, installation position
The fan is used in ducts with DN200…DN 600
(depending on the fan type). It can be mounted
in any installation position in dry rooms. The
complete unit may only be installed in walls,
ceilings, brackets etc. with sufficient load-bearing
capacity.
•
Protective grille
The fan/duct should be secured against the
danger of foreign bodies falling in or being sucked
in, in line with the safety requirements of equipment
and product safety legislation. In the case of free
inlet or outlet, you should install a protective grille,
in line with DIN EN 294 (DIN 31001).
•
Degree of protection
The fan complies with the degree of protection
indicated on the rating plate (IP54 or IP55) if
mounted horizontally, and, if mounted vertically,
with air flow direction downwards.
•
Temperatures
Please refer to the valid Maico catalogue for the
maximum permitted airstream temperature.
•
Rated voltage, Power frequency
The fan should only be operated using the
rated voltage and power frequency indicated
on the rating plate.
•
Fixed electrical cabling
The fan may only be connected to a fixed elec-
trical installation. This must be fitted with a mains
isolation device that has contact openings of at
least 3 mm at each pole.
Transport, Storage
•
When installing the fan, make sure that no loads
are placed on sensitive components, such as the
impeller or terminal box.
•
Maico will not consider any replacements or
guarantee claims in the event of incorrect transport
methods.
•
Storage: The fan should only be stored horizon-
tally in a suitable, dry room, with an ambient
temperature from –10 °C to +40 °C. Maico
assumes no liability for corrosion damage cause
by incorrect storage, for example, if the unit is
stored in a humid area. Long periods of storage
should also be avoided. Check the correct
functioning of the motor bearings before
installation.
Installation
Notes
•
We recommend the use of flexible cuffs and
couplings (types EL and ELA), a mounting foot
(FU) and vibration dampers (GP), to prevent the
transfer of vibrations onto the duct system.
•
Air flow direction, rotational direction
– in the standard model , the air-flow direction “A”
draws the air over the motor, see Fig. 2.1.
– Special models with fan with reverse air-flow
direction and non-reduced flow power. In this
case, the air-flow direction “B” blows the air over
the motor, see Fig. 2.2.
– Position “D” = Rotational direction of the
impeller
•
Airstream and rotational directions are indicated
by arrows marked on the fan housing
•
The fan is factory-set such that when it is connected
to the power, it delivers the maximum flow power.
The flow direction can also be reversed, by
swapping the power connections L1 and L2.
Please note that:
•
in reverse operation, the flow power is reduced
by about 35%,
•
the fan is designed for continuous use, i.e. not
for frequent changes of rotational direction, which
can cause the fan motor to heat up to more than
permitted limits.
Procedure
1. Prepare the ducting . Folded spiral-seams ducts
with a DN 200 to DN 600 diameter are allowed,
depending on the fan type. Use folded spiral-
seams duct with a diameter that matches the fan.
Please refer to the valid Maico catalogue for
dimensions. If necessary, separate any folded
spiral-seams duct at the installation site.
2. Installing a fan with an “FU..” mounting foot
on a wall, ceiling or bracket:
Secure the mounting foot at any position on the
fan housing using the self-tapping screws supp-
lied. Take note of the position of the terminal box
– it must be freely accessible.
3. Lay the folded spiral seams ducts flush against
the fan, on the intake and on the pressure side.
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