Siemens QFA3100, QFA3101, QFA3160, QFA3160D, QFA3171 Installation Instructions Manual

Installation Instructions

Q-Series Outdoor Air Relative Humidity
Sensors

QFA3100

Outdoor air humidity sensor (2%),
0 to 10 Vdc

QFA3101

Outdoor air humidity sensor (2%),
4 to 20 mA

QFA3160

Outdoor air humidity sensor (2%),
0 to 10 Vdc/Temp 0 to 10 Vdc

QFA3160D

Outdoor air humidity sensor (2%),
display

QFA3171

Outdoor air humidity sensor (2%),
4 to 20 mA/Temp 4 to 20 mA

QFA3171D

Outdoor air humidity sensor (2%),
display

QFA4171

Outdoor air humidity sensor (2%),
4 to 20 mA/Temp 4 to 20 mA, certified

QFA4171D

Outdoor air humidity sensor (2%),
with displa y

QFA4160

Outdoor air humidity sensor (2%),
0 t 10 Vdc/Temp 0 to 10 Vdc, certified

QFA4160D

Outdoor air humidity sensor (2%),
with displa y

Accessories

AQF3101

Sensor filter cap

AQF4150

Replaceable, certified sensor tip

AQF3100

Sun shield

74 662 0104 0

US 1/2-inch rigid conduit adapter

Document No. 129-416

October 5, 2009

and Relative Humidity & Temperature

Product Description

The Q-Series Outdoor Air Relative Humidity, and
Relative Humidity & Temperature Sensors monitor
and transmit changes in humidity and temperature to
the building control systems. These units are
especially suited for applications where precise,
stable humidity sensing is required. Standard
models available are 2% and 2% certified, for both
humidity only and combination humidity with
temperature sensing. Sensors are offered with either
4 to 20 mA or 0 to 10 Volt output signals.

Product Numbers

Part Number Description

0 to 10 Vdc/Temp 0 to 10 Vdc with

4 to 20 mA/Temp 4 to 20 mA with

Required Tools

Expected Installation Time

30 minutes

Prerequisites

• Ensure that the appropriate field wiri ng is

• Ensure that all wiring complies with National

Installation

• Phillips screwdrivers, sizes No. 1 and No. 2

• Medium flat-blade screwdriver

• Wire cutters/strippers

• Tape measure

• Medium-duty electric drill

• Drill bit for wall anchor hole

• Marker or pencil

• Two No. 10 screws and wall anchors

installed.
Appropriate wiring is one or more twisted pair or

three conductor cables (plenum or non-plenum
as required) within the maximum wiring run
length for the humidity/temperature controller.
The maximum recommended length is 750 feet
(229 m).

Electric Code (NEC) and local regulations.

4 to 20 mA/Temp 4 to 20 mA, certified

0 t 10 Vdc/Temp 0 to 10 Vdc, certified

Item Number 129-416, Rev. BA Page 1 of 2

1. Determine where the sensor is to be located and
install the Sun Shield, AQF3100, as shown in
Figure 1. The installation surface determines
which mounting components are to be used.

NOTE: The shield must be mounted vertically

as shown in Figure 1.

2. Remove sensor cover and install plug in
knockout next to sensing probe. See
Figure 1 (2).

3. Pull the field wiring through the conduit and into
the sensor base. See Figure 2.