Siemens QAM2020.045 Owner's manual

1000
Ω
Nickel RTD
Sensors
Technical Instructions
Document No. 155-330P25
September 5, 2008
Siemens Industry, Inc.
QAM2020.045, QAM2020.020 and
QAM2020.010
Duct Point Sensor
QAE2020.005 Immersion Sensor
QAC2020U Outside Air Sensor
QAA24U Room Sensor
QAA25U Room Sensor with
Remote Setpoint Adjustment
QAP22 Cable Temperature Sensor
Application The 1000 ohm Nickel temperature sensors are used in HVAC installations to measure
room, outside air, duct or liquid temperature. They can also be used to provide
changeover from heating to cooling, or vice versa.
They are designed for integration in terminal units such as fan coil or induction units.
The sensors can be installed either by the terminal unit manufacturer or on site.
Product Numbers
Table 1.
Product Number Description
QAM2020.045
Duct point sensor, 18-inch
QAM2020.020
Duct point sensor, 8-inch
QAM2020.010
Duct point sensor, 4-inch
QAE2020.005
Immersion sensor
QAC2020U
Outside air sensor
QAA24U
Room sensor
QAA25U
Room sensor with remote setpoint adjustment
QAP22
Cable temperature sensor

Technical Instructions 1000 ΩNickel RTD Sensors
Document Number 155-330P25
September 5, 2008
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. Products or company names mentioned herein may be the trademarks of their respective owners.
© 2008 Siemens Industry, Inc.
Siemens Industry, Inc.
Building Technologies Division
1000 Deerfield Parkway
Buffalo Grove, IL 60089
+ 1 847-215-1000
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Document No. 155-330P25
Printed in the USA
Page 2
Principle of
Operation The sensor's nickel sensing element measures the air or medium temperature.
The resistance of the sensing element changes as a function of the ambient
temperature.
Mechanical Design The QAP22 Cable Temperature Sensor sensing element is incorporated in the
1000 Ohm Nickel RTD sensors. It is a nickel resistor housed in a metal sleeve so that it
is mechanically and electrically protected. The connecting cable inside the metal sleeve
is provided with a strain relief.
•The QAA24U and QAA25U room sensors have a temperature sensor mounted
on a circuit board.
•The plastic housing has a detachable wall plate.
Specifications
QAM2020.045,
QAM2020.020,
QAM2020.010,
QAE2020.005,
QAC2020U and QAP22
Range of use –13°F to 203°F (−25°C to 95°C)
Sensing element Siemens Ni1000 at 32°F (0°C)
Permissible ambient temperature
Cable –13°F to 203°F (−25°C to 95°C)
Intermittent (two hours/day) –13°F to 230°F (−25°C to 110°C)
Permissible ambient humidity 95% rh 30 days
Connecting cable (QAP22) PVC, 20 AWG
Length 6 feet (1.8 m)
QAA24U and QAA25U Range of use 32°F to 122°F (0°C to 50°C)
Sensing element Siemens Ni1000 at 32°F (0°C)
Permissible ambient temperature 32°F to 122°F (0°C to 50°C)
Permissible ambient humidity <85% rh
Wiring screw terminals for wires of 2 × 16 AWG or 1 × 12 AWG
Minimum 20 AWG
Installation Complete installation instructions are provided with the sensors.
Accessories AQM2000 Flange gasket kit (if adjustable depth is required for QAM2020.045 duct
point temperature sensors)
ARG70 Wall plate kit (required for wall box mounting)
Wiring
Legend:
B1 Temperature sensor
signal
B2 Setpoint signal
M Measuring, neutral
Figure 1. QAP22,
QAM2020.045, QAM2020.020,
QAM2020.010 and
QAE2020.005.
Figure 2. QAA24U.
Figure 3. QAA25U.