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Siemens
Flow switch QVE1902.0..
CM1N1596en
Building Technologies
2017-02-16
Commissioning notes
The switching unit is factory set as a make contact, i.e. the reed contact opens if
the set switching point is breached.
Type of contact
Setting
Flow rate
Electric contact
NO
(closer)
RED arrow
increasing
closing
decreasing
opening
NC
(opener)
WHITE arrow
increasing
opening
decreasing
closing
The setting can be changed as needed by the customer:
x
Loosen the locking screw (Phillips-head screw) and position the switching unit
until the red or white arrow are visible at the entry of the switching contact guide
for a desired normally open (NO) or normally closed (NC) contact respectively.
x
You can use the arrow length to make fine adjustments to the switching point:
Adjust to the arrowhead means: Switching point is at a lower flow rate.
Adjust to the arrow end: Switching point is at a higher flow rate.
x
Carefully retighten the locking screw.
x
We recommend using thread locker to secure the locking screw on the switching
unit after carrying out individual adjustments.
NO contact (red arrow)
NC (white arrow)
Operating notes
x
Please make sure that there are no external magnetic fields in the immediate
vicinity of the flow switch, since these can impair device operation.
x
Ensure that the maximum operating pressure is not exceeded.
Service notes
x
Never remove a flow switch or its body from a system under pressure.
x
The flow switch is maintenance-free and cannot be repaired by the user.
Contact type factory
setting
NO or NC contact
Setting the
switching unit
Hindustan Hydraulics & Pneumatics, Chennai - 01.
Phone : 2534 3066, 2534 5625, 2534 5587
E-Mail : [email protected]
Contact person : V. Anandha krishnan - 98409 21885
