•Connect the external equipotential bonding connection to electrical ground.
•Tighten the screws of the connection terminals and close the cover.
Intrinsically safe system:
•The end user is responsible for verification of the intrinsically safe circuits consisting of
the switches and the thermostat in combination with the barrier used. Artidor provides an
example of the descriptive system document which can be used for verification of the
intrinsically safe properties of the system.
•Use a screened cable of type Helukabel OZ-BL-CY 2x0,75 mm2, total length < 175 m.
•It is critical for the intrinsic safe system to use screened cables. Screens of connected
cables need to be connected as well. The junction box of the indoor unit provides Ex i
terminals for this purpose.
•The screens of the cables of the intrinsic safe circuits may not be connected to earth in
hazardous area. Do not connect the screens of the intrinsic safe circuits to earth of the
connection box.
•Remote control and temperature switch assembly in type of protection intrinsic safety Ex
ia IIC, only for connection to a certified intrinsically safe circuit with the following
maximum values:
Ui= 20 V, Ii= 100 mA, Pi= 100 mW, Ci= 0 µF, Li= 1 µH.
9. Design requirements outdoor unit
•For correct temperature control of the indoor unit, the compressor of the outdoor unit
should be switched off if the normally-closed temperature switch opens (T > 110˚C).
•Provide a protection against over-currents of the electric motor according to EN 60204-1
by means of a motor protection switch. The current limit is given at the wiring diagram.
•Using a frequency converter for changing the fan speed is not allowed.
•Earthing of the screen of the intrinsic safe circuits is prescribed at a single point in safe
area only. The screen of this circuit must be earthed at the same point as the intrinsically
safe circuit which it is screening (near the barriers).
•An example of the wiring diagram will be issued together with the indoor unit.
10. Commissioning
Before start-up of the electric fans
•Verify the tightening of all bolts and nuts (refer to table 2), in particular with regard to the
head screws for locking the motor to the wall plate and the wall plate to the structure.
•Check the free rotation of the impeller and the absence of skidding, rotating it by hand.
Ensure absence of foreign objects in the fan.
