Page 2
FLX-PC
®
Vacuum / Pressure Controller
Operation Manual
FM-060M-0-84B
Vacuum Pump Control
The system is designed to maintain a level of vacuum in the
piping network between -0.150 BAR and -0.180 BAR. These
values are fixed and cannot be changed.
Supervisory pressure
The pump starts at -0.150 BAR and stops at -0.180 BAR.
- 0 . 1 5 0 B A R +
When the pump is in operation, the sign [
] appears to the
right of the first line.
Note
: The vacuum pump will not operate if a trouble
condition is present on the
FLX-PC
®
unit.
Forced Shutdown
The forced shutdown of the vacuum pump takes place when
the deluge valve is operated, an automatic sprinkler has
been activated or that the vacuum pump has worked for a
period of more than 35 minutes.
- 0 . 1 8 0 B A R *
When the pump is shutdown, the sign [
] is displayed to the
right of the first line.
To allow the vacuum pump to start, you must first correct the
situation and put the system in normal condition of operation.
Refer to the section
B
MECHANICAL SECTION
of the
Operation
and
Maintenance
Manual
of
the
F
IRE
F
LEX
®
VACTEC
®
system.
Once the system is back in operating condition, press and
hold the push-button for 5 seconds to restart the vacuum
pump. Release the push-button as soon as the pump starts
or until the sign [
] disappears.
Note
: The history display appears after 3 seconds; do not
release the push-button before the end of 5 seconds.
Low and High Pressure
A supervisory signal is transmitted to the release control
panel in the following situations:
- 0 . 1 4 0 B A R
L O W P R E S S .
When the vacuum level reaches -0.140 BAR. This can
happen if the vacuum pump does not work. Refer to the
section
D
VACUUM SUPPLY
of the Operation and
Maintenance Manual of the
F
IRE
F
LEX
®
VACTEC
®
system to
correct the situation.
If the vacuum level reached -0.220 BAR, this indicates a high
level of vacuum and this situation is abnormal. Refer to the
section
D
VACUUM SUPPLY
of the Operation and
Maintenance Manual of the system
F
IRE
F
LEX
®
VACTEC
®
to
correct the situation.
- 0 . 2 2 0 B A R
H I G H P R E S S .
Note
: Supervisory signals are kept latched for a period of
5 seconds.
Alarm Pressure
Note
: This section do not applies to vacuum single interlock
pre-action systems.
An alarm pressure signal is transmitted to release control
panel when the vacuum level reaches -0.130 BAR.
- 0 . 1 3 0 B A R
A L A R M P R E S S .
Note
: Alarm signal is kept latched for a period of 5 seconds.
Operation Mode
The
FLX-PC
®
unit can be configured to match the different
types of interlock for a pre-action system, via switch SW1
located inside the case. This switch is configured at the
factory and should not be changed.
Quick Detection of Sprinkler Opening
The
FLX-PC
®
unit can be configured so that it can quickly
detect an automatic sprinkler opening; this configuration is
done via the switch SW2 located inside the case. When this
mode is enabled, the letter [D] is displayed to the right of the
first line. This allows for a time of operation less than
5 seconds between the automatic sprinkler opening and the
opening of the deluge valve.
- 0 . 1 6 0 B A R D
A L A R M S P K
This operation is valid under the following conditions:
Sprinkler K Factor
Network Capacity
K5.6(80) to K<11.2(161)
2000 US gal (7.57m
3
)
K11.2(161) to K<25.2(363)
3000 US gal (11.4m
3
)
K25.2(363) and bigger
4000 US gal (15.1m
3
)
An alarm pressure signal is transmitted to the release control
panel when a variation of the vacuum corresponding to the
opening of a vacuum sprinkler is detected.
