RZ eta-engl Kopie - HOWATHERM

6
Optimum outflow
Direct drive
Controlability
F7 F7
Maintenance benefits and operating
reliability
In addition to our efforts to minimize the
electrical power consumption of this range,
maintenance behaviour and operating reliability
were priority optimization objectives
for our development engineers.
In this respect, too, the elimination of the
belt drive provides major advantages. The
F7
time-consuming and costly replacement of
the belt, re-tensioning and belt monitoring
are no longer an issue. Since no belt
abrasion takes place, the pressure-side filter
becomes redundant as well. And a
non-existent fan bearing needs no maintenance
and, of course, cannot fail.
The load on the motor bearing exerted by
the fan wheel is actually smaller than that
imposed by belt tension. As a result, availability
rates will be increased.
Single intake fans with backward curved
blade wheels, direct driven, turned 90° to
the operating plane. Optimum inflow in
the air direction without flow deflection
losses.
The arrangement of the motor right in the
airflow results in optimum cooling. The
use of high-efficiency motors additionally
reduces the amount of energy converted
into heat. Direct coupling to the fan eliminates
wheel drive and belt losses; motor
speed is varied by the frequency control
action of a frequency converter.
The basic control capability of the fan permits
an on-demand flow control, e.g., to
account for filter resistance in normal service,
different resistances in mixed-flow
mode, or varying resistance levels across
the cooler during dry or demoisturizing
operation.