Siemens QVE1902.010 Manuale utente

CM1N1596en

2017-02-16 Building Technologies

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 : 2534 3066, 2534 5625, 2534 5587

E-Mail : hhp@hindustanhydraulic.in

Contact person : V. Anandha krishnan - 98409 21885

2 / 6

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 : 2534 3066, 2534 5625, 2534 5587

E-Mail : hhp@hindustanhydraulic.in

Contact person : V. Anandha krishnan - 98409 21885

3 / 6

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 : 2534 3066, 2534 5625, 2534 5587

E-Mail : hhp@hindustanhydraulic.in

Contact person : V. Anandha krishnan - 98409 21885

4 / 6

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

(closer)

RED arrow increasing closing

decreasing opening

(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 : 2534 3066, 2534 5625, 2534 5587

E-Mail : hhp@hindustanhydraulic.in

Contact person : V. Anandha krishnan - 98409 21885

5 / 6

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

Circuit breaker max. 13 A

Characteristic B, C, D according to

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 : 2534 3066, 2534 5625, 2534 5587

E-Mail : hhp@hindustanhydraulic.in

Contact person : V. Anandha krishnan - 98409 21885

6 / 6

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]

[inch]

[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. +41 41-724 24 24

www.siemens.com/buildingtechnologies

Delivery and technical specifications subject to change

Hindustan Hydraulics & Pneumatics, Chennai - 01.

Phone : 2534 3066, 2534 5625, 2534 5587

E-Mail : hhp@hindustanhydraulic.in

Contact person : V. Anandha krishnan - 98409 21885

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