Eliwell RGF 312 - Rgf 300 Easy Reference Commissioning Guide

RGF 300
48/53
6.0 rgf 300
EASY REFERENCE COMMISSIONING GUIDE
Having connected the supply and load to the regulator, the control system commissioning operation must be
divided into two phases in order to separate the
definition
of the regulator
work voltage limits
(
P4-P5-P6
)
from the
surround control values (P3-P2
with mA - Vdc - °C) in automatic regulation:
QUESTION ANSWER HOW TO PROCEED
Should the fan reach
100
% speed in
automatic regulation?
(
P4)
•
NO
•
YES
•
With
P5
in position
M
, turn
P4
clockwise slowly starting from
‘
M
’ until the desired max.
voltage is reached.
•
Turn
P4
to position ‘
M
’
Should the fan constantly rotate at a
fixed speed regardless of the
automatic regulation signal?
(
P5)
•
YES
•
NO
•
Starting from ‘
m
’, turn
P5
slowly anticlockwise until
reaching the desired voltage
•
Turn
P5
to position ‘
m
’
The fan starts rotating at
100 VAC
.
How can you find this
CUT-OFF
(rotation start) value?
(
P6)
Starting from ‘
m’,
slowly turn
P5
anticlockwise until reaching the
voltage value that turns the fan
slowly
( e.g.:
100VAC
)
Having found the correct value with
P5
, starting from ‘
m
’, turn
P6
slowly anticlockwise until the
supply
STOP
threshold (
Led
RL1=OFF
with
J14=3
) so as to
overlay it on the
P5
value.
Once the
P4, P5
and
P6
values have been defined and therefore become fixed reference parameters, define
the work field values (
P2
Proportional Band) and work point value (
P3
Set-point) in the:
“MASTER”
CONFIGURATION with control in
mA / Vdc / °C
P3,
point where the system reaches maximum supply to the load, starting from
MIN.OUT
or
CUT-OFF
P2,
point where the system reaches the
MIN.OUT
control value for the fans
How can you determine the
proportional band?
(P2)
Use the P2 trimmer.
First, check the trimmer's work
parameters (
fig. 32
).
Starting from position ‘
m
’, turn
P2
anticlockwise until the position
considered as the optimum
regulation is reached.
How can you determine the Set-
Point?
(P3)
Use the P3 trimmer.
First, check the scale zone in which
to operate (
fig. 34
).
Starting from position ‘
c
’, turn
P3
clockwise or anticlockwise until the
position considered as the optimum
regulation is reached.
Once
P2
and
P3
have been positioned, check the modulation system and slowly correct by using:
P3
(
+/-
) if the Set-point is not working at the required pressure or temperature, and with
P2
(
+/-
) if the fan voltage variation is too fast or too slow.