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Chapter 6
2. FRENIC5000G11S/P11S Series
6-4
Caution
The information described in this catalog is for the purpose of selecting the appropriate products.
Before actually using this product, be sure to read the instruction manual carefully to ensure proper
operation.
1. Features a built-in PID control function.
• Excess blower airflow can be eliminated constantly maintain-
ing a fixed amount of dissolved oxygen in the aeration tank.
This results in energy savings.
• The use of a built-in PID control function makes conventional
controllers unnecessary. Controlling the amount of dissolved
oxygen can easily be achieved simply by installing a sensor
(4 to 20mA) that detects dissolved oxygen.
2. Greater energy savings realized with the auto-
matic energy saving operation function.
• The energy saving effect is not as impressive for aeration
tank blowers compared with the results achieved with other
types of blowers. However, energy savings are significantly
enhanced once the automatic energy saving operation is
activated, when the system has sufficient treatment capacity.
3. Unnecessary to resort to any special sound-
proofing measures; Fuji inverter drives a motor
with silent motor sound.
• We have succeeded in eliminating most of the unpleasant
motor sound that usually comes from the motor which is
driven by the inverter. The inverter, whose sound levels are
comparable to those of commercial power sources.
■
Wiring diagram/System configuration
2. FRENIC5000G11S/P11S Series
2.1 Using with Aeration Tank Blowers
■
Advantages
Keypad panel
Aeration tank
Constant surface
level
Dissolved oxygen
sensor
Aeration blower
CM
G
DC REACTOR
(DCR)
Sensor power
supply unit
4 to 20mA
current output (*)
(+)
(-)
Control power supply
Alarm output
(for any fault)
"Inverter running"
signal output
Output for cooling fan
operation for inverter panel
L2/S
L3/T
13
12
11
C1
FWD
CM
X1(Hz/PID)
FAB (MCCB)
Device for setting the amount
of dissolved oxygen
0 to 1k
Ω
From sensor current
output (*) (4 to 20mA)
Relay for operation
command FX
Relay for PID control cancel
P1
P(+)
DB
30C
30B
30A
Y5C
Y5A
Y1
CME
FRN G11S-
VR
(+)
(
-
)
Built-in
resistor
(DBR)
U
V
W
L1/R
Hz/PID
30
RUN
RUN
Chapter6-2(P4˜5).p65
07.8.9, 12:51
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