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Technical Instructions

QVE1901U Flow Switch

Document Number 155-711
September 20, 2012

Information in this publication is based on current specifications. The company reserves the right to make changes in specifications and models as
design improvements are introduced. Product or company names mentioned herein may be the trademarks of their respective owners.
© 2012 Siemens Industry, Inc.

Siemens Industry, Inc.

Building Technologies Division
1000 Deerfield Parkway
Buffalo Grove, IL 60089-4513
USA
+1-847-215-1000

Your feedback is important to us. If you have
comments about this document, please send them
to

[email protected]

Dimensions

Cutting the Paddle

Line Size

Inches

(mm)

L3 in. (mm)

0.75 (20)

1.69 ± 0.039 (43±1)

1.00 (25)

1.93 ± 0.039 (49±1)

1.25 (32)

2.13 ± 0.039 (54±1)

1.50 (40)

2.50 ± 0.039 (64±1)

2.00 (50)

2.91 ± 0.039 (74±1)

3.00 (80)

4.09 ± 0.039 (104±1)

4.00 (100)

4.49 ± 0.039 (114±1)

6.00 (150)

4.49 ± 0.039 (114±1)

8.00 (200)

4.49 ± 0.039 (114±1)

2.00 (50)

3.00 (80)

4.00 to 8.00 (100 to 200)

Line Size

0.75 (20)

1.00 (25)

1.25 (32)

1.50 (40)

SEN0538R1

Flow Switch

SEN0539R1

1.50

(38)

4.72

(120)

1.81

(46)

2.91

(74)

0.78

(20)

1/2-14 NPT

3.42

±0

(87±

Dimensions in Inches (Millimeters).

Document No. 155-711

Printed in Germany

Page 8

Содержание QVE1901U

Страница 1: ...ype NO NC Housing IP 65 excluding conduit adapter Maintenance free Application The QVE1901U Flow Switch is used in HVAC installations to monitor the flow of fluids in hydraulic systems especially in refrigeration heat pump and heating installations for example for use with condensers boilers heat exchangers and so on Product Number QVE1901U Warning Caution Notations WARNING Personal injury loss of...

Страница 2: ...ng on the contact type See Adjusting the Switching Unit Reed Contact 3 Paddle System 1 Shaft Flow Magnet 4 Magnet 2 SEN0528R1 N S N S Figure 1 Switching Value Table for Water at 68 F 20 C Make Contact NO Red Arrow Break Contact NC White Arrow 1 2 V SEN0529R1 1 2 V SEN0530R1 1 2 V SEN0530R1 1 2 V SEN0529R1 Line Size Inches mm Max Flow Rate gpm m 3 h Setpoints gpm m3 h Factory Setting Setpoints gpm ...

Страница 3: ...ter in the flow switch can result in frost damage Mechanical installation General installation instructions First clean the pipe system where the flow switch is installed and remove any magnetic particles such as welding residue The laminar path length in front of and behind the flow switch must be at least 10 times and 5 times the pipe diameter respectively The nominal installation position of th...

Страница 4: ...ons WARNING Danger of death due to electrical voltage Always disconnect power to the system before connecting wires of the main cable CAUTION Destruction or damage of reed contact Note the maximum contact loads stated on the type plate The maximum contact loads stated on the type plate switching voltage switching current and switching capacity refer to pure ohmic loads and may not be exceeded unde...

Страница 5: ...ly cable through the screwed conduit adapter g the pressure ring l and the rubber insert k into the cable socket d See Figure 8 Connect the wires as shown in the connection diagram below SEN0535R1 Reed Contact Reed Contact Not Occupied Not Occupied Reed Contact Not Occupied Reed Contact 1 2 3 1 2 3 Figure 9 Press the core j into the cable socket d until it locks into place See Figure 6 SEN0593R1 6...

Страница 6: ...ching head SEN0536R1 To Open Here Figure 10 Loosen the locking screw 0 1 2 5 mm hexagon socket screw and position the switching unit until the red or white arrow is visible at the entry of the switching contact guide to make contact or break contact respectively 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 ...

Страница 7: ...conditions Operation and storage 4 F to 176 F 20 C to 80 C Ambient humidity 95 rh Norms and standards conformity to Low voltage directive 2006 95 EEC Product standard EN 60204 1 Materials color Housing Polyamide black non wetted component Union nut Brass non wetted component Body Brass Threaded adapter 1 2 NPT Brass Paddle system PPO Noryl GFN3 black Axle Stainless Steel Magnet Hard ferrite Seal N...

Страница 8: ... Your feedback is important to us If you have comments about this document please send them to SBT_technical editor us sbt siemens com Dimensions Cutting the Paddle Line Size Inches mm L3 in mm 0 75 20 1 69 0 039 43 1 1 00 25 1 93 0 039 49 1 1 25 32 2 13 0 039 54 1 1 50 40 2 50 0 039 64 1 2 00 50 2 91 0 039 74 1 3 00 80 4 09 0 039 104 1 4 00 100 4 49 0 039 114 1 6 00 150 4 49 0 039 114 1 8 00 200 ...

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