imo fans atex006

Electrical connection |
21
Changing the discharge direction
As a default, the Multiboxes have been designed
for an inline airflow direction. The airflow can be
changed from inline to 90° by replacing the side
panels.
MUB-EX
1.
2.
3.
Legend
1. MUB-EX with inline airflow direction (factory
assembly)
2. MUB-EX with 90° airflow direction
3. Change of airflow direction
8.4.1 Lightning protection device
♦ If the risk assessment shows that there is the risk of an atmospheric discharge, lightning protection measures must
be taken. For reasons of operational safety, provide for a suitable lightning protection system according to country
specific directives (e.g. DIN VDE 0185).
9 Electrical connection
Safety information
Danger
Risk of ignition of a potentially explosive gas/air atmosphere!
If the fan is connected to electricity via an additional connection box (not included in the scope of
delivery) in explosion capable area, the following points must be observed:
♦ A connection box (with its own certification and explosion-protection identification) which has been
selected as suitable for this area must be used.
♦ Wether the technical characteristics of components match the requirements of the explosion capable
area must be checked by the customer.
Protection against explosions regarding use of accessories:
♦ Electronic accessories without explosion-protection (e.g. RTRD control device and UEK motor protection)
must be installed outside the explosion capable area.
♦ Speed control by frequency converter is only admissible for devices with the „Pressure-proof
encapsulation Ex d“ ignition protection class.
Protection against explosions in general:
♦ Earth at the planned earthing point.
♦ In hazardous areas connect conductive components to a potential equalisation system.
Warning: Danger from electrical voltage!
♦ Observe the 5 rules of electrical safety, see 3.3 5 rules of electrical safety, page 3.
♦ Prevent the ingress of water into the connection box.
♦ Electrical connection may only be carried out by adequately qualified persons, details see Table 1 Qualifications, page
3.
Preconditions
♦ Potentially, the fans may become charged with static electricity. If this represents a risk, please contact Systemair.
♦ If fans with motors of ignition protection class „d“ are controlled by frequency converter, a thermal protection (PTC)
in the motor is necessary.
Connection
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