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F
Integrated Fire Protection System
Electrical Section – Dry-pipe Vacuum Sprinkler System - Electric Release
FM-060M-0-114B
3- FLX-PC
®
Vacuum / Pressure Controller
The
FLX-PC
®
VACUUM / PRESSURE CONTROL
unit is equipped
with a microcontroller based circuit that uses a piezoelectric
type pressure sensor to analyze the pressure in real time in
a piping network and perform various control operations. It
includes a LCD type display with 2 lines of 16 characters
that displays the status of the system. A single push-button
on the side is used to perform the various commands.
The
FLX-PC
®
unit is powered by the release control panel
and consumes very little energy. Various pre-established
parameters allow to conduct supervisory and fire protection
system release via connections to the release control panel.
The
FLX-PC
®
unit allows the control of the start-stop cycle of
the vacuum pump according to pre-established parameters.
Figure 2 - Internal arrangement of the FLX-PC
®
unit
CONTROL
PUSH-BUTTON
SERVICING CONNECTOR
19 20 21 22 23 24 25 26 27
10 11 12 13 14 15 16 17 18
1 2 3 4 5 6 7 8 9
P1
P2
P3
P4
ON
SW1-2
RV1
FACTORY SET
LCD CONTRAST ADJUSTMENT
PRESSURE TRANSDUCER
FACTORY SET
CONFIGURATION FOR
OPERATION MODE AND
FAST DETECTION
FACTORY WIRED
CONNECTION JACKS
1/2-NPT CONNECTION TOWARDS PIPING
LCD DISPLAY
FM-061H-2-8A
WIRING TOWARDS
JUNCTIONS BOX
3.1 Display in Normal Condition
The system pressure is displayed in real time on the first line
(see
PRESSURE UNITS CONVERSION
section for a list of other
units of pressure).
- 0 . 1 8 0 B A R
1 6 8 : 3 0 : 2 5 5 : 2 0
The second line shows information on the operation of the
vacuum pump. The hour meter on the left represents the
time (in hours: minutes: seconds) between the last two starts
of the pump; this gives an idea of the frequency of the pump.
The hour meter on the right represents the operation time of
the pump (in minutes: seconds) during its last start.
The limit of the time meter on the left is 9999:59:59. The
one on the right is 99:59. Each counter restarts at zero
when the limit is reached.
In the attached example, we can see that the pump starts
approximately once a week (the last two cycles of the pump
having been separated from 168 hours, 30 minutes and
25 seconds) and that the last startup time was 5 minutes,
20 seconds.
This information is useful for identifying a change of state in
the pipe network or a change in the performance of the
pump. In a normal state of supervision, the frequency and
duration of operation should be constant with time.
3.1.1 LCD Display Intensity
The brightness of the LCD display is kept at a low level. By
pressing the push-button momentarily, the display reaches
its full brightness; the full brightness will be kept for a period
of one minute.
The contrast of the LCD display is calibrated at the factory,
but can be changed via the RV1 adjustment potentiometer
located inside the case.
