6
RD.. and VD.. – Roof Fans
Installation and Operating Instructions
3.3 Electrical connection
WARNING
The fan must be isolated from the mains power supply and secure against being switched on again before
all maintenance and installation work or before opening the terminal compartment!
– The electrical connection and start-up must only be carried out by qualified electricians according to the information
in the terminal box / isolator switch and the attached wiring diagrams.
– All relevant standards, safety regulations (e.g. DIN VDE 0100), as well as the technical connection conditions of ener-
gy suppliers are to be adhered to!
– An all-pole mains switch / isolator switch is mandatory for installation sizes Ø 180 to 250!
– The casing must be dismantled for electrical connection for sizes 180 to 250 in the terminal box version.
– Network configuration, voltage and frequency must be consistent with the rating plate information.
– In principle, the motors are wired in the clockwise field of rotation for clockwise rotation.
– Protective conductors, including additional equipotential bonding, must be properly installed!
– Check the waterproofing of the connection cable and tight clamping of the strands.
– The insertion of the supply line must be carried out by specialists! The connection line in the terminal box/ isolator
switch (IP 65) must compensate for the potential fan vibrations.
Installation accessories for the terminal box/isolator switch must meet the requirements of IP 65.
Never lay cables over sharp edges!
3.4 Start-up
WARNING
The rotating impeller can crush fingers.
Ensure protection against contact before start-up!
The following inspection work must be carried out or checked before the start-up:
– Check designated use of fan
– Check permissible transport media temperature
– Compare power consumption to rating plate data
– Check fan for professional electrical installation
– Check protective conductor connection
– Remove assembly residues from the fan or duct
– Check all parts for tightness, particularly screws, nuts, protection guards. Do not loosen screws in the process!
– Check fan for solid mounting! The terminal box / isolator switch and motorised impeller unit must be freely accessi-
ble.
– Ensure that the suction and outlet areas cannot be accessed by unauthorised persons.
– Check tightness of all connections (if necessary)
– Check free movement and direction of rotation of impeller by briefly switching on;
wear protective glasses when
checking
.
– Compare power consumption to rating plate data
– Test motor protection device for functionality. Check fan for vibration and noise during test run. In case of excessive
vibration and/or noise, it can be assumed that the fan is operating outside of its operating range. In this case, contact
the manufacturer by all means!
– Check the waterproofing of the connection cable and tight clamping of the strands
– Do not operate fan outside of specified characteristic curve (see catalogue / internet) . The fan must run at its spe-
cified operating point.
– In order to ensure sufficient motor cooling, a minimum speed/voltage, which also depends on on-site resistances,
wind
pressure,
etc.,
must
be
observed
for
voltage
controlling
through
phase
control.
It must be selected so that a safe, jolt-free start-up and operation are ensured.
3.5 Operation
Regularly check the proper functioning of the fan:
– Free movement of the impeller
– Power consumption in the range of the type plate data
– Check any vibrations and noises
– Formation of dust or dirt deposits in the casing or on the motor and impeller
– In case of problems with one of the aforementioned points, maintenance must be carried out according to the
instructions in chapter 4.
UK
ATTENTION
nmr
WARNING
WARNING
ATTENTION
l
NOTE
☞
