3
Rectangular Centrifugal Fans – InlineVent
®
SKR/KR ...
Installation and Operating Instructions
NOTE
Do not transport the fan on the connection cables, terminal box or impeller!
Do not stand under suspended loads!
2.3 Receipt
The shipment must be checked for damage and correctness immediately upon delivery. If there is any damage,
promptly report the damage with the assistance of the transport company. If complaints are not made within the agreed
period, any claims could be lost.
2.4 Storage
When storing for a prolonged time, the following steps are to be taken to avoid damaging influences: Motor protection
by dry, airtight and dust-proof packaging (plastic bag with desiccant and humidity indicators). Vibration-free, water-tight
and constant-temperature storage at a temperature in the range -20 °C to +40 °C. In case of a storage period of more
than three months or motor standstill, maintenance must be carried out before start-up according to chapter 8. In case
of reshipment (above all, over longer distances; e.g. by sea), it must be checked whether the packaging is suitable for
the form and route of transport. Damages due to improper transportation, storage or putting into operation are not lia-
ble for warranty .
2.5 Performance data
The unit type plate gives an indication of the mandatory electrical values; which must be coordinated with the local sup-
ply network. The fan performances* were established on a test stand according to DIN EN ISO 5801.
NOTE!
The maximum current in regular operation may deviate or be higher than the nominal current! Observe unit type
plate data!
2.6 Noise data
Noise data that refers to certain distances apply to free field conditions. With regard to installation, the sound pressure
level can differ significantly from the catalogue data, as it is highly dependent on the installation conditions, i.e. on the
absorption capability of the room and the room size among other factors.
2.7 Air flow direction and direction of rotation
The fans have a fixed direction of rotation and air flow direction (they are not reversible), which are marked on the units
with arrows (direction of rotation red, air flow direction blue). The air flow direction can be set through the installation.
Incorrect direction of rotation can lead to lower air volumes, increased noise levels and increased power consumption,
which can destroy the motor.
2.8 Protection against contact
- Rectangular centrifugal fans SKR../KR.. are not delivered with fan protection guards as standard. Depending on the
installation conditions, protection against contact may be necessary on the suction and/or discharge side. Corre-
sponding protection guards are available as accessories.
- Fans which are protected by their installation method (e.g. installation in ventilation ducts or closed assemblies) do
not require protection guards if the plant provides the necessary level of safety. Please note that the operator is
responsible for complying with the current standard and can be held liable for accidents as a consequence of missing
protection systems.
2.9 Motor protection
All rectangular centrifugal fans have thermal contacts (TC) fitted in the motor windings. These protect the motor against
overloading. Triggered thermal contacts indicate incorrect operating conditions, the cause of which must be remedied.
With regard to units
KRW 180/2/30/15
KRW 225/2/40/20
KRW 225/2/50/25
the thermal contacts are connected in series with the winding and they disconnect the power supply if the motor tem-
perature is too high. The automatic reset takes place after cooling.
With regard to units
KRW 315/4/50/25
SKRW 315/4/50/25
KRW 355/4/60/35
SKRW 355/4/60/35
KRW 400/4/70/40
SKRW 400/4/70/40
KRW 450/4/70/40
SKRW 500/4/80/50
KRW 500/4/80/50
and
3~/400 V three-phase units,
the thermal contact connections are fed to the terminal block in the terminal box and
connected to a motor protection device (see accessories).
Note
If the thermal contacts are triggered frequently (standstill), the fan must be inspected by a specialist according
to chapter 1.4.
UK
WARNING
NOTE
