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Rules for a correct ductwork
•
each duct must serve a maximum of 2 fans – DO NOT
EXCEED this limit
•
if multiple fans share the same duct, they must belong to
the same refrigerant circuit and the same air-cooled
exchanger system.
IMPORTANT:
The duct connections on the units must not generate any
mechanical stress on the fan supporting structure.
Install an access hatch at each duct outlet to promote
maintenance of ventilation components.
Fan motor electrical protection
In case of a locked rotor or an overload, the motors of each
circuit are electrically protected by the circuit variable speed
drive.
Each drive follows a variable current characteristic, based on
the frequency from 10 to 60 Hz and the number of controlled
fans.
If a fan stops working, the drive automatically detects the
malfunction.
Refer to the control manual for the list of alarms specific to
this option.
12.2.9 - Power factor correction (Option 231)
The power factor correction is active for all of the machine's operating conditions.
The power factor performance is guaranteed at 0.95 when the unit is running in conditions which require a power supply that
exceeds the Eurovent standard condition.
A capacitor battery is controlled by a controller which reads the current draw by the unit and adjusts the power factor to a
setting of 0.95.
The capacitors are dry type: no risk of leakage or fire.
The capacitors are selected for each unit as per below table:
Unit size RBM/P
160
180
200
220
260
300
330
360
400
430
470
520
Capacitor capacity
kVAR
30
30
30
40
40
50
50
60
60
70
70
80
Capacitor 1
Capacity
kVAR
10
10
10
10
10
10
10
20
20
10
10
20
Ir
A
14
14
14
14
14
14
14
29
29
14
14
29
Capacitor 2
Capacity
kVAR
20
20
20
10
10
20
20
20
20
20
20
20
Ir
A
29
29
29
14
14
29
29
29
29
29
29
29
Capacitor 3
Capacity
kVAR
-
-
-
20
20
20
20
20
20
40
40
40
Ir
A
-
-
-
29
29
29
29
29
29
58
58
58
WARNING:
Operation of the unit without capacitors raises the current.
Содержание 30RBM 160
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