page 91 of 91 USB-QFLCII-14804/0
12. Annex
12.1 Q-FlapCompact II/Plus Inlet isolation device sequence
of operation with REMBE
®
, Inc. Monitoring Panel
Before start up:
Flap is locked closed (no voltage on release mechanism), closed-position (formerly known as deposit sensor) reads
flap as closed, wear and tear sensor (Plus models only) reads normal. Green light is illuminated indicating system
normal. Shutdown relay is active, enabling system to be started (Normal).
On command to start system:
Signal from starter/vfd that the motor is starting closes start contacts, voltage is applied to locking mechanism, coil
releasing flap. Timer starts, Flap opens, closed-position sensor reads movement of flap. Timer (15 Sec) removes
voltage from coil activating lock, wear and tear sensor (Plus models only) reads normal. Green light illuminates
indicating system normal. Shutdown Interlock relay is normal.
On command to shut down:
Signal from starter that fan is running is removed, Timer for closed position sensor starts, flap starts to close, Wear
sensor is normal, closed position sensor indicates flap closed, closed position sensor Timer expires and system is
shut down normally, ready to start. Shutdown Interlock relay is normal
Alarms:
Closed-Position Alarm. If the closed-position sensor does not see flap closure at shutdown (within the time
allowed by timing relay) a red light is illuminated and alarm lock out created to not allow restart
of equipment until
the flap is cleared .Shutdown Interlock Relay is deactivated disabling the fan and all associated equipment. Only
after a check of the flap and the chamfered pipe connection and the clearing of all obstructions can the system be
reset and put back into operation. Manual reset required.
Wear Alarm. If the wear sensor reads open indicating wear on the aluminum plate on the
bottom of the flap, Yellow
light illuminates indicating inspection and maintenance required on Q-Flap at next available shutdown. No lockouts
activated. In case of visible abrasions on the flap and pipe connection they must be replaced.
System Incident Alarm. If, while the system is running, the closed-position sensor sees a flap closure
indicating a
deflagration in the vessel, Red alarm light will be illuminated and the Shutdown Interlock Relay is deactivated. This
will shut down and lockout all associated equipment. Alarm
will be activated and system will be locked out. Manual
reset required.
Flap Failure Alarm. If the closed-position sensor does not see the flap open before the Locking
mechanism is re-
activated, Yellow light will illuminate and a flap failure alarm will be created. System must be check for debris
preventing flap opening or fan failure. This is not a manual reset alarm.
Wear Sensor. The wear sensor is used to monitor abrasion in the unit during operation. If wear
is indicated, the
unit should be inspected at the next available shut down. Once the unit is shut
down it should not be restarted until
the flap and chamfered pipe connection are inspected.
The wear sensor is monitored by means of a safety barrier. The barrier sends a normally closed signal to the
monitoring device signaling an alarm if the circuit is broken or cable is disconnected. The unit may continue to
operate but must be serviced in a timely manner if an alarm is present.
If there is visible abrasion on the inlet isolation device or pipe connection,
the blade and connection should be replaced immediately!
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