21
OPERATION RULES
The fan is rated for connection to 220...240 V / 50 Hz power mains
and is designed for continuous operation always connected to
power mains.
The air motion direction in the system must match the pointer on the
fan casing.
The fan is rated for operation at ambient temperature from +1 °C up
to +45 °C.
The fan does not require grounding.
SAFETY RULES
All operations related to the fan electrical connections, servicing and
repair works are allowed only after the fan disconnection from
power mains.
All mounting and servicing operations are allowed for duly qualified
electricians with valid electrical work permit for electric operations
at the units up to 1000 V after careful study of the present user's
manual.
The single-phase power grid must comply with the acting local electrical
norms and standards. The fixed electrical wiring must be equipped
with an automatic switch that is used for connection of the fan to
power mains with gap on all poles at least 3 mm.
Make sure the impeller and the casing are not damaged before
starting installation. The casing internals must be free of any foreign
objects which can damage the impeller blades.
Misuse of the product or any unauthorized modification are not allowed.