WARNING!
Explosion hazard due to incorrect installation!
Fuses and circuit breakers are no adequate motor
protection. Inadequate motor protection can lead to
an explosion.
More on fans:
Appendix A.1 ‘Ziehl-Abegg RH..C / ER..C fan’
Appendix A.2 ‘Nicotra Gebhardt RLM... fan’
5.6.4 Equipotential bonding
Personnel:
Skilled qualified electrician for Ex areas
Equipotential bonding prevents electrostatic ignition
hazards.
Connect wires and cables safely and permanently and
so that they cannot come loose.
Fig. 38: Terminal point for equipotential bonding on the
AHU base frame
Connect the following components to the equipotential
bond (by others):
Air handling unit, Fig. 38
Ducts and flexible connectors
Duct insulation
Components and devices by others
Conductive components such as metal cable ducts
Bypass all non-conductive components (e.g. flexible
connectors, anti vibration elements) with an equipoten-
tial bonding cable.
5.6.5 Lightning protection for outdoor
units
Explosion-proof air handling units for outdoor installation
need to be fitted with an adequate lightning protection
system (by others). Connect all metal parts of the sup-
porting construction (ladders, platforms etc.) with earth
conductors. Air handling units themselves are like a
metal enclosure and are hence protected against light-
ning anyway.
Metal constructions with internal components (ducts,
pipes etc.) must not be used for the dissipation of light-
ning energy. To avoid direct lightning strikes, such con-
structions have to be installed such that they are pro-
tected by existing arrest equipment (lightning rods etc.).
To prevent flash overs between the metal constructions
and the arrest equipment of the lightning protection
system, the metal constructions have to be included in
the lightning equipotential bonding arrangement to IEC/
EN 62305-1 (VDE 0185-305-1).
5.7 Integrating the air handling unit
with the central BMS
It is the duty of the system owner/HVAC contractor to
integrate the air handling unit with the building services
and to ensure conformity,
Installation
Integrating the air handling unit with the centr...
Air handling unit X-CUBE Ex
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