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Siemens QFM2100 Installation Instructions Manual

Q-series relative humidity (rh) and relative humidity & temperature (rh/t) duct sensors.
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Q-Series Relative Humidity (RH) and
Relative Humidity & Temperature (RH/T) Duct Sensors

Product Description

Relative Humidity (RH) and Relative Humidity &
Temperature (RH/T) duct sensors monitor the
relative humidity or the relative humidity and
temperature in a duct, depending on the model.
Sensors are directly wired to the controller via
twisted pair and/or three conductor cables
(18 to 22 AWG). The number and type of cables
required depends on the model selected. All field
wiring is terminated in a terminal block on the sensor
body.
Product Numbers
Table 1. Relative Humidity Only.
Product
Humidity
Number
Signal
QFM2100
0 to 10 Vdc
QFM3100
QFM2101
4 to 20 mA
QFM3101
QFM4101
Table 2. Relative Humidity and Temperature.
Product
Temperature
Number
Signal
QFM2160
0 to 10 Vdc
QFM3160
QFM4160
QFM2171
QFM3171
4 to 20 mA
QFM4171
QFM2110
Pt 1KΩ
QFM2120
Ni 1KΩ
QFM2140
T1 PTC
QFM3110
Pt 1KΩ
Applies to humidity only
NOTE:
Sensor tips on QFM31... and QFM41...
models are field replaceable.
Item Number 129-413, Rev. 011
Accuracy
±5%
±2%
±5%
±2%
±2% Certified
Humidity
Accuracy
Signal
±5%
0 to 10 Vdc
±2%
±2% Cert.
±5%
4 to 20 mA
±2%
±2% Cert.
±5%
0 to 10 Vdc
±2%

Installation Instructions

Additional Reference Documents
Product Number
QFM21...
QFM3160
QFM4160

Required Tools

Phillips screwdrivers, #1 and #2
Wire cutters/strippers
Medium flat-blade screwdriver
Tape measure
Medium-duty electric drill
Marker or pencil
No. 26 (0.147-inch) drill bit
Small level
7/8-inch drill bit or hole saw
Two No. 8 × 1-inch sheet metal screws
Expected Installation Time
One hour
Prerequisites
Ensure that the appropriate field wiring is
installed.
Appropriate wiring is one or more twisted
pairs, or three conductor cables (plenum or
non-plenum as required), within the
maximum wiring run length for the individual
equipment controller. The maximum
recommended length is 750 feet (229 m).
Ensure that all wiring complies with National
Electric Code (NEC) and local regulations.
Mounting Information
Locate the sensor:
In the center of a duct.
Away from fans, corners, heating and cooling
coils, and so on.
Where it receives adequate airflow for proper
operation.
Document No. 129-413
October 13, 2004
Technical Instructions
155-748
155-749
155-750
Page 1 of 3

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   Summary of Contents for Siemens QFM2100

  • Page 1: Installation Instructions

    Product Humidity ♦ • 7/8-inch drill bit or hole saw Accuracy Number Signal • Two No. 8 × 1-inch sheet metal screws QFM2100 ±5% 0 to 10 Vdc QFM3100 ±2% Expected Installation Time QFM2101 ±5% 4 to 20 mA QFM3101 ±2%...
  • Page 2 Document No. 129-413 Installation Instructions October 13, 2004 • Direct installation: Instructions a. Remove the sensor cover. 1. Drill a 7/8-inch diameter hole into the duct at the b. Use the base as a template, and drill four desired location of the sensor. holes with a No.
  • Page 3: Wiring Diagrams

    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. Other product or company names mentioned herein may be the trademarks of their respective owners. © 2004 Siemens Building Technologies, Inc. Siemens Building Technologies, Inc.

This manual also for:

Qfm3100Qfm3101Qfm2101Qfm4101Qfm2160Qfm3160 ... Show all

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