Siemens QVE1902.010 User manual

CM1N1596en
2017-02-16 Building Technologies
s
1
596
Flow switch
For liquids in piping DN 10…25
QVE1902.010
QVE1902.015
QVE1902.020
QVE1902.025
xContact load: max. AC 230 V, 1 A, 26 VA
DC 48 V, 1 A, 20 W
xNominal pressure PN10
xManual contact setting (NO/NC contact)
xHousing protection type IP 65 / Protection class II
xMaintenance free
Use
In HVAC plants to monitor the flow of liquid medium in hydraulic systems, in
particular, refrigeration, heat pump and heating plants, e.g. for evaporators, boilers,
heat exchangers, etc.
Hindustan Hydraulics & Pneumatics, Chennai - 01.
Phone : [phone]
E-Mail : [e-mail]
Contact person : V. Anandha krishnan - 98409 21885

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Siemens Flow switch QVE1902.0.. CM1N1596en
Building Technologies 2017-02-16
Type summary
Type / ASN Order number (SSN) Name
QVE1902.010 S55720-S199 Flow switch
QVE1902.015 S55720-S200 Flow switch
QVE1902.020 S55720-S201 Flow switch
QVE1902.025 S55720-S202 Flow switch
Ordering
When ordering, please specify the quantity, type, and product name.
Sizing
Switching value table for water at 20 °C
Type (ASN) DN Threading
[inch]
Qmax
[l/min]
Factory setting (range) [l/min]
QVE1902.010 DN 10 �20 3.2 (2.8…3.7) 2.7 (2.0…3.4 3.6 (3.1…4.1)
QVE1902.015 DN 15 ½30 4.2 (3.6…4.9) 3.4 (2.8…4.0) 4.4 (3.7…5.1)
QVE1902.020 DN 20 ¾80 7.6 (6.9…8.4) 7.1 (6.1…8.2) 8.7 (8.0…9.5)
QVE1902.025 DN 25 1130 12.0 (10.8…13.3) 10.5 (8.9…12.1) 13.1 (12.0…14.3)
Engineering notes
xThe flow switch QVE1902.0xx is not a safety component in terms of Directive
2006-42-EC.
xOperational safety of the supplied device is only guaranteed when used properly
(monitoring the flow of liquids). Under no circumstances may the indicated limit
values (see "Technical data") be exceeded.
xYou must ensure that the materials used in the flow switch are sufficiently
chemically and mechanically durable against the medium to be monitored as
well as external influences.
xComply with maximum contact load for the reed contact. The maximum contact
load indicated on the type label applies to Ohm loads only and may not be
exceeded under any circumstances.
High voltage or current spikes may occur when switching, in particular, inductive
or capacitive loads (e.g. relay coils, capacitors). Even a short overload may
destroy (fusing of contacts) or damage (reduced life cycle) reed contacts.
Use appropriate and tested safety measures.
xSelect suitable measures to prevent the medium from freezing.
Do not operate, e.g. testing, the flow switch using pure water if operated in
ambient temperatures of <4°C. Residual water in the flow switch may result in
frost damage.
Warning
Caution
Hindustan Hydraulics & Pneumatics, Chennai - 01.
Phone : [phone]
E-Mail : [e-mail]
Contact person : V. Anandha krishnan - 98409 21885

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Siemens Flow switch QVE1902.0.. CM1N1596en
Building Technologies 2017-02-16
Mounting instructions
xA smoothing section of at least 10 x or 5 x the pipe diameter respectively must
be planned prior to and after intended location.
xFirst, clean the pipe system where the flow switch is installed and remove any
magnetic particles, e.g. wielding residue.
xDo not use grease or oils to seal the flow switch or its piping.
xhorizontal, at a maximum angle of 45°, as well as
xvertical
See illustration below
xEnsure when mounting that the arrow points parallel to the pipe axis and
indicates the direction of flow.
xInstall the section of piping for the flow switch the same as a valve in the existing
piping.
Installation notes
xComply with all local regulations on electrical systems.
xOnly qualified personnel may do the electrical installation.
xAlways de-energize the system before connecting the wires of the mains cable.
xThe connecting cable to relieve tension has a reserve loop so that there is
sufficient "play (cable)" when making fine adjustments to the switching unit.
Orientation
Hindustan Hydraulics & Pneumatics, Chennai - 01.
Phone : [phone]
E-Mail : [e-mail]
Contact person : V. Anandha krishnan - 98409 21885

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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:
xLoosen 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.
xYou 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.
xCarefully retighten the locking screw.
xWe 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
xPlease make sure that there are no external magnetic fields in the immediate
vicinity of the flow switch, since these can impair device operation.
xEnsure that the maximum operating pressure is not exceeded.
Service notes
xNever remove a flow switch or its body from a system under pressure.
xThe 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 : [phone]
E-Mail : [e-mail]
Contact person : V. Anandha krishnan - 98409 21885

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Siemens Flow switch QVE1902.0.. CM1N1596en
Building Technologies 2017-02-16
Disposal
The device is considered an electronics device for disposal in terms of European
Directive 2012/19/EU and may not be disposed of as domestic garbage.
xDispose of the device through channels provided for this purpose.
xComply with all local and currently applicable laws and regulations.
Technical data
Field of use
Permissible media
Medium temperature
Piping diameter
Nominal pressure
All liquids
(not suitable for ammonia)
-20…100 °C (Medium may not freeze)
DN 10…25
PN 10
(piping approved for PN 25)
Contact
Type of switch
Max. contact rating
Max. switching capacity
Length of connecting cable/cross section
External supply line protection (EU)
Closes as flow increases
*
)
Opens as flow decreases *)
Reed contact
AC 230 V, 1 A / DC 48 V, 1 A
26 VA or 20 W
1.5 m / 0.5 mm2
Fuse slow max. 10 A
or
Circuit breaker max. 13 A
Characteristic B, C, D according to
or
Power source with current limitation of
max. 10 A
Switching point adjustment
Setting range
Manual, set at the factory to
the middle of
the setting range
See Sizing on page 2
Protection class
Housing
II according to EN 60730-1
IP65 according to EN 60529
Storage, transportation, operation
Temperature
Humidity
0…70 °C
<95 % r.h.
Product standard EN 60204-1
Safety of machinery - Electrical
equipment of machines
EU Conformity (CE) CM1T1596xx
**)
The product environmental declaration CE1E1596
*
*
)
contains data on
environmentally compatible product design and assessments (RoHS compliance,
materials composition, packaging, environmental benefit, disposal).
Excl. packaging See under "Dimensions and weight"
Switching unit/connecting cable
Housing and paddle system/piping
Polyamide / PVC
PPE+PS Noryl FE1630PW / brass
Black
*) Applies to delivery state (switching function can be inverted as needed).
**) The documents can be downloaded from http://siemens.com/bt/download.
Functional data
general
Switching function
Degree of protection
Environmental conditions
Standards and Directives
Environmental
compatibility
Dimensions / Weight
Material
Housing color
Hindustan Hydraulics & Pneumatics, Chennai - 01.
Phone : [phone]
E-Mail : [e-mail]
Contact person : V. Anandha krishnan - 98409 21885

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Siemens Flow switch QVE1902.0.. CM1N1596en
Building Technologies 2017-02-16
Dimensions and weight
Dimensions in mm
Type (ASN) Nominal
width dia
Qmax
[l/min]
G
[inch]
L
[mm]
h
[mm]
H
[mm]
Weight
[g]
QVE1902.010 DN 10 20 G� 11 41.5 101.5 255
QVE1902.015 DN 15 30 G½ 11 41.5 101.5 220
QVE1902.020 DN 20 80 G¾ 15 46.0 105.5 239
QVE1902.025 DN 25 130 G1 15 55.5 115.5 315
Published by:
Siemens Switzerland Ltd.
Building Technologies Division
International Headquarters
Gubelstrasse 22
6301 Zug
Switzerland
Tel. [phone]
www.siemens.com/buildingtechnologies
© Siemens Switzerland Ltd 2017
Delivery and technical specifications subject to change
Hindustan Hydraulics & Pneumatics, Chennai - 01.
Phone : [phone]
E-Mail : [e-mail]
Contact person : V. Anandha krishnan - 98409 21885