Eliwell RGF 312 - Page 36

RGF 300
36/53
4.1 MAX. OUTPUT regulation (P4 trimmer) - PHASE 1
fig. 29
P4
MAX
.
OUTPUT
M = 100%
m = 0%
Limits the maximum operating voltage (from 100% to 0%).
It is useful for limiting the maximum capacity or noise of the fan when turning at max.
speed.
It is set in the factory to the max. value ‘
M’
which corresponds to the max. voltage
supplied to the fan and equal to 100% of the control value.
To regulate the
MAX. OUTPUT
voltage correctly, proceed as follows:
1)
bring the
P5
trimmer (manual control of minimum voltage) to position ‘
M’;
2)
turn the
P4
trimmer starting from position ‘
M
’ as far as the desired MAX. voltage value;
3)
bring the
P5
trimmer to minimum value ‘
m’
: the output voltage to the load will have the
P4
value as
MAX
.
4.2 MIN. OUTPUT regulation (P5 trimmer) - PHASE 1
fig. 30
P5
MIN
.
OUTPUT
m = 0%
M = 100%
Allows manual regulation of the minimum output voltage from 0 to 100%.
During the calibration starting phase, it is used to check the regulator for correct cutting
regulators and the fans for correct rotation.
It is also used as reference for
CUT-OFF
calibration (
P6
) and calibration of the max.
output voltage (
P4
).
Regulation of trimmer
P5
supplies the fan with a constant minimum voltage when the automatic control is
not working or the control input is disconnected.
Rotate
P5
anticlockwise starting from position ‘
m
’ until the desired minimum voltage is reached.
Mm
100% 80%
Mm
cc
Max. output
setting
0
400
Vac
P4 100%
P5
%C
P4 80%
SP
Mm
0% 20%
Mm
cc
Min. output
setting
400
Vac
P4
P5 20%
%C
SP
P5 0%