Installation Instructions

ManualsBrandsSiemens ManualsSensors HumidityKC Certificate QFM2101

Document No. 129-413

October 5, 2009

Q-Series Relative Humidity (RH) and

Relative Humidity & Temperature (RH/T) Duct Sensors

Item Number 129-413, Rev. CA Page 1 of 3

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

Number

Humidity

Signal

Accuracy

♦

QFM2100

0 to 10 Vdc

±5%

QFM3100

±2%

QFM2101

4 to 20 mA

±5%

QFM3101

±2%

QFM4101

±2% Certified

Table 2. Relative Humidity and Temperature.

Product

Number

Temperature

Signal

Humidity

Signal

Accuracy

♦

QFM2160

0 to 10 Vdc 0 to 10 Vdc

±5%

QFM3160

±2%

QFM3160D

QFM4160

±2% Cert.

QFM2171

4 to 20 mA 4 to 20 mA

±5%

QFM3171

±2%

QFM3171D

QFM4171

±2% Cert.

QFM2110

Pt 1KΩ

0 to 10 Vdc

±5%

QFM2120

Ni 1K

Ω

QFM3110

Pt 1K

Ω

±2%

♦

Applies to humidity only

NOTE: Sensor tips on QFM31… and QFM41…

models are field replaceable.

Additional Reference Documents

Product Number Technical Instructions

QFM21…

155-748

QFM3160

155-749

QFM4160

155-750

Required Tools

• Phillips screwdrivers, No. 1 and No. 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.

Summary of content (3 pages)

PAGE 1
Installation Instructions Document No. 129-413 October 5, 2009 Q-Series Relative Humidity (RH) and Relative Humidity & Temperature (RH/T) Duct Sensors Additional Reference Documents Product Description Product Number 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.
PAGE 2
Document No. 129-413 Installation Instructions October 5, 2009 • Instructions a. Remove the sensor cover. 1. Drill a 7/8-inch diameter hole into the duct at the desired location of the sensor. 2. Decide if the sensor will be mounted directly to the duct or if the mounting flange will be used. • Sensor Mounting Bracket Installation a. Use the bracket as a template, and drill two holes with a No. 26 (0.147-inch) drill bit. See Figure 1(B). b.
PAGE 3
Document No. 129-413 Installation Instructions October 5, 2009 Wiring Diagrams Figure 4. Rh Sensors, 4 to 20 mA. Figure 3. Rh Sensors, 0 to 10 Vdc. Figure 5. Rh/T Sensors, 0 to 10 Vdc. Figure 6. Rh/T Sensors, 4 to 20 mA. NOTE: For individual panel wiring details, see the appropriate hardware manual. Figure 7. Rh/T Sensors, Thermistor RTD, 0 to 10 Vdc.