Data Sheet for Product

Shorting plug in the mid position (R2) = − 10...+ 120 °C (factory setting),
Shorting plug in the right position (R3) = 0..70 °C
• For activating the test function:
Shorting plug in the horizontal position: The values according to the table "Test
function active" will be made available at the signal output.
In the event of fault, the output signal will reach 0 V (4 mA) after 60 seconds.
Accessories (not included with standard delivery)
Name Material
Nominal
pressure
Type of sealing
Immersion
length
Type
reference
Compression fitting
V4A (1.4571)
PN16
Threaded with sealing means
---
AQE2102
Protection pocket
Brass (CuZn37)
PN10
Threaded with sealing means
100 mm
ALT-SB100
Protection pocket
Brass (CuZn37)
PN10
Threaded with sealing means
150 mm
ALT-SB150
Protection pocket
V4A (1.4571)
PN16
Threaded with sealing means
100 mm
ALT-SS100
Protection pocket
V4A (1.4571)
PN16
Threaded with sealing means
150 mm
ALT-SS150
Protection pocket
V4A (1.4571)
PN40
With flange for flat seal
100 mm
ALT-SSF100
Protection pocket
V4A (1.4571)
PN40
With flange for flat seal
150 mm
ALT-SSF150
For other protection pocket accessories, refer to Data Sheet N1194.
Engineering notes
If the nominal pressure exceeds PN10, protection pockets made of stainless steel
(V4A) are required. The temperature measuring range must be selected on the sensor,
if required.
To power the sensor, a transformer for safety extra low-voltage (SELV) with separate
windings for 100 % duty is required. When sizing and electrically protecting the
transformer, local safety regulations must be observed.
When sizing the transformer, the power consumption of the temperature sensor must
be taken into consideration. For correct wiring, refer to the Data Sheets of the devices
with which the sensor is used.
The permissible cable lengths must be observed.
When laying the cables, it must be observed that the longer the cables run side by side
and the smaller the distance between them, the greater the electrical interference.
Twisted pair cables are required for the secondary supply lines and the signal lines.
Mounting and installation notes
Depending on use, the sensor should be located as follows:
• For flow temperature control (heating flow):
– Directly after the pump if the pump is located in the flow
– 1.5 to 2 m after the mixing valve if the pump is located in the return
• For return temperature limitation:
In the return at a location where the temperature can be correctly acquired
The sensor should be installed in an elbow such that the immersion rod or the
protection pocket faces the direction of flow. The water must be well mixed where the
temperature is acquired. This is downstream from the pump or, if the pump is mounted
in the return, at least 1.5 m after the mixing point.
The sensor should be mounted such that the cable does not enter from the top.
With all types of sensors, the immersion length must be a minimum of 60 mm!
The sensor must not be covered by lagging.
Fault
Cable routing and
cable selection
3/6
Siemens Immersion temperatur sensors QAE2164..., QAE2174... CE1N1782en
Building Technologies 2014-07-30