9
Disconnect the damper from the power supply (electric mains) prior to any work on the unit.
Power mains connection shall only be performed by a qualified electrician.
The nominal electrical parameters of the fan are given on the manufacturer's label.
Any tampering with the internal connections is prohibited and will void the warranty.
The fans take 230 V 50/60 Hz single-phase alternating current.
The fan connections (cables and wires) must be durable, insulated and heat-resistant.
The external lead-in (230 V 50/60 Hz) must be equipped with an automatic circuit breaker
built into the stationary wiring to disconnect all the mains phases.
The location of the QF external switch must ensure unobstructed access for shutting down
the fan quickly if required.
The protection trip current must be consistent with the current consumption of the fan.
The recommended nominal current of the automatic cutout switch is 0.6 A,
2
the recommended minimum conductor cross-section is 0.5 mm .
The conductor cross-section values are given for reference only while the actual selection
must be based on the maximum permissible wire heating which depends on the wire type,
its insulation, length and installation method (i.e. overhead, in pipes or inside the walls).
CONNECTION TO POWER MAINS
TECHNICAL MAINTENANCE
STORAGE REGULATIONS
The technical maintenance of the fan includes periodic cleaning of the fan surfaces from
dust and dirt.
The filter must be replaced on a need-to-do basis, but at least every 6 months.
The impeller cleaning and filter replacement steps are given in Fig. 9.
The impeller blades must be thoroughly cleaned from dust and dirt every 6 months.
The fans must be stored in the original packing in a well-ventilated area at temperatures
from +5 °C to +40 °C and relative air humidity up to 80 % (at Т= +20 °C).
VP
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