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4. Electrical connections
WARNING!
Before starting installation ensure that the
electrical circuit you are working on has been shut off.
The appliance must be earthed!
4.1 230Vac supply connection (EC motor)
Power supply to this appliance must be made by wiring
into the terminals within the fan motor. See diagrams in
chapter 6.
The installation must comply with all applicable local and/
or national standards i.e. NEN 1010.
There should be a suitable electrical circuit with a main
fuse. There is an electrical diagram further on in this guide.
The power supply is 230Vac (50 Hz) with earth.
The fan must to be equipped with a 230Volt isolation
switch or power plug. This switch should disconnect phase
and neutral (not earth) and have a 3mm contact opening
at least. Switches or power plugs must be accessible at all
times.
4.2 EC motor connection options
The SD-EC is equipped with an on/off thermostat. This
thermostat is connected with the 0-10V control of the
motor. The thermostat measures the temperature near
the fan and switches on the motor when the set temper-
ature has been reached. For correct setting of tempera-
tures, see paragraph 5.1
Besides setting the temperature, the fan speed has to be
set. This van be done in the following ways:
1. Maximum speed only
2. Speed regulator
3. External via 0-10V d.c.
4.2.1 Maximum speed only:
The maximum speed can be set by installing a wire be-
tween the contacts [T2] (Out) and [S3] (In) on the 6-pole
connector. The fan will always run at the maximum speed.
See chapter 6, diagram 3.
4.2.2 Speed regulator (potentiometer)
On contacts [T1], [T2] and [S3] of the 6-pole connector,
the optional speed regulator GA3955, or a 3 wire potenti-
ometer can be used. Please make sure that the resistance
of the potentiometer has a value of 10kΩ. See chapter 6,
diagram 4.
4.2.3 External via 0-10V d.c.
On contacts [T1] and [S3] of the 6-pole connector an ex-
ternal voltage can be connected to control the speed. See
chapter 6, diagram 5.
ATTENTION!
Attention
The SD-EC needs 2 signals in order to run.
The thermostat contact on the WCU has to be closed and
the speed setting has to be made. If one of these signals is
missing, the motor will not run.
5. Setting, operation and maintenance
WARNING!
Before starting maintenance make sure that
the electrical circuit you are working on has been isolat-
ed.
The appliance must be earthed.
5.1 Setting the thermostat
Set the thermostat of the SD unit approx. 4 to 7°C above
the ambient temperature desired at 1.5m above floor
level. The smaller the difference between the room ther-
mostat setting and that of the SD destratification fan, the
longer the unit will be operative.
5.2 Operation
The SD does not need manual control, it is automatic.
Generally temperature setting has to be done by
the installer. The user is allowed to do following settings:
•
Set the temperature at which the fan should ven-
tilate.
•
Turn ON/OFF main switch
•
Change fan speed by adjusting the speed regulator
ATTENTION!
Attention:
Do not set the louvres at an angle greater
than 20°. This will reduce the air volume and in turn the
throw.
5.3 Maintenance
In areas where heavy dust is present, it may be necessary
to clean the fan & guard with compressed air once a year.
If the guard is covered with severe dust, the fan will not
provide optimal performance.
Check if the appliance turns ON and OFF as it should on
the thermostat.
Pay attention on:
•
The ON and OFF switching from the thermostat
•
The smooth rotation of the fan
•
Remove the dust from the appliance
•
Check that the fan does not have severe vibration
because of unbalance on the fan blades
5
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