page 38 of 91 USB-QFLCII-14804/0
4.4.2 Closed-position sensor (formerly deposit sensor) requirements
When the system is shut down, the closed-position sensor should signal the
correct closing of the flap. If the sensor signal does not indicate a closing of
the flap when the system is off, a fault should be indicated and the system
must be shut down.
Monitoring the closed
position sensor The system may be restarted again only after inspecting the inlet isolation device and the
chamfered pipe connection for possible deposit accumulations and after removing any
deposits found.
Closed-position sensor monitoring (See also Section 12.1 Q-FlapCompact
II/Plus inlet isolation device sequence of operation with REMBE
®
monitoring panel):
The sensor provides a “1” signal when the flap is closed.
• The closed position will be delayed until after the fan ceases running.
• The monitoring of the signal is time related and must be adjusted (normally 10 to
180 sec).
• An alarm “malfunction inlet isolation device” will be activated if the flap does not
reach the closed position
within the set time. It may not be closing to due
accumulated deposits.
Following a manual check and acknowledgement that debris is cleared, the unit
is ready to be operated.
WARNING
If no closed-position sensor signal is sent during fan shutdown, this
could indicate deposit accumulations or that the flap blade is not
properly closed!
This also creates a shutdown alarm and must be reset after the debris is
cleared. The system must not be put back into operation until the inlet isolation
device is inspected for deposit accumulations and cleaned or the reason for
the lack of a closed position sensor signal is detected and resolved.
---------------------------------------------------------------------------------------------------------
Monitoring during
system operation
No signal ("0" signal) is released to the monitoring panel on system start-up and
the flap blade opens. The monitoring panel must be designed to ensure that the
closed-position sensor monitored during the entire system operation. See also
Section 12.1 Q-FlapCompact II/Plus inlet isolation device sequence of operation
with REMBE® monitoring panel.
To Next Page
Loading...
