Siemens LMV5 Quick Start Manual page 23

7MF1564 Pressure Sensors
The 7MF1564 series of pressure sensors mount by their 1/4" NPT threads located on the "nose" of
this pencil type of pressure sensor. The sensor can be mounted in any orientation, however the
sensor must be mounted on a cold drip leg so that the sensor will detect pressure but will be
isolated from high temperature steam. These sensors are typically used on steam boilers.
Note: Low range steam sensors (0-15psi and 0-30psi) 4-20mA sensors should not be used
on boilers that are subjected to a vacuum condition after shutdown. For these
applications, use a 0-10VDC sensor or a higher range 4-20mA sensor.
An electrical plug is included on the back of the sensor that will accept liquid-tight conduit fittings.
Please see Section 1, page 4 for part numbers.
Please see Section 10-1 for specifications.
QAE2020.005 Temperature Sensors
The QAE2020.005 Nickel 1000 temperature sensors mount by their 1/2" NPT threads which are
located on the 1/2" diameter thermowell. The thermowell should be completely immersed in the
medium that it measuring. These sensors are typically used on hot water boilers up to 266
can also be used for ambient temperature, if desired. A small LB is included on the back of the
sensor for connecting conduit and for making electrical terminations.
Note: The QAE2020.005 is a replacement for the discontinued 556-541.
Please see Section 10-1 for specifications.
LMV5 QSG Rev 4
Figure 2-4.4 7MF1564 Dimensions (inches)
Figure 2-4.5 QAE2020.005 Dimensions (inches)
Sec 2 Pg 7 www.scccombustion.com
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