User Manual

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Siemens Differential pressure sensor QBM64-P4 CA1N1921E
Building Technologies 2018-01-31
Mounting instructions
Mounting instructions are enclosed with the differential pressure sensor.
The QBE64-DP4 sensor can be connected directly with R
1
/8" screwed fittings. Special
precautions must be taken on site when mounting the sensors to ensure airtight screw
connections.
• Use standard T-fittings or drill and de-bur measuring holes, each 5 mm diameter, for
the pressure tapping points (A).
• An isolating bypass (5) can be fitted, to avoid overloading the pressure sensor on one
side while making adjustments.
• For inspection purposes, measuring circuits can be fitted with a measuring-T at the
sensor head.
Mounting for use with liquids:
• Always mount the sensor lower than the pressure measuring points
• Mount on a vibration-free surface
• Always evacuate the system
Supply Return
QBE...-DP...
P1
+
P2
–
2
2
3
3
4
4
1
1
A
A
+
–
5
ø max. 5 mm
90°
80357
4
Key:
A Measuring holes
1 Isolating valves
2 T-joints
3 Connection pieces (from mounting kit AQB 2002)
4 Copper pipes (from mounting kit AQB 2002)
5 Isolating bypass
For remote mounting, the sensor can be operated together with the AQB pressure
mounting kit in ambient temperatures of up to 70 °C for medium temperatures of up to
180 °C. Care must be taken in this case to ensure that the cooling efficiency of the
copper pipe is not reduced by additional heat sources or by restrictions to the air circu-
lation.
Disposal
• Dispose of the device via the channels provided for this purpose.
• Comply with all local and currently applicable laws and regulations.
Recommended
measures
Important note
Remote mounting