Siemens QFA3212.FWxN User manual

Installation Instructions
Document No. 129-104
December 11, 2017
Series
2200 and 3200 Relative
Humidity
and Temperature Room Units
Page 1 of 4
Product Description
These room units measure relative humidity and
temperature in the occupied space in which they are
installed. Models with display allow users to view the
measured temperature value. A version with
temperature setpoint adjustment is also offered.
The effective sensing range is 32°F to 122°F (0°C to
50°C), and the setpoint range is 55°F to 95°F (13°C
to 35°C). The humidity measuring range is 0 to
100% RH.
Hardware is included for installation on drywall or on
a 2” × 4” electrical box.
Product Numbers
QFA3212.FWxN QFA32SS.FWxN
QFA3212.EWxN QFA32SS.EWxN
QFA3232.EWxN
Accessories
AQA2200-INTL Room Unit Back Plate
(10-pack)
563-102 GSKT KIT Room Sensor Insulating
Gasket (10-pack)
(For hollow wall installations)
Caution Notations
CAUTION
Equipment damage or loss of
data may occur if you do not
follow a procedure as
specified.
Item Number 129-104, Rev. JA
Expected Installation Time
20 minutes
Required Tools
•Sizes 1 and 2 Phillips screwdrivers
•Small and medium flat-blade screwdrivers
•1/16-inch hex key
•Medium-duty electric drill
•3/16-inch (4.8 mm) drill bit
•One-inch (25 mm) hole saw
•Small level
•Tape measure
•Marker or pencil
Prerequisites
•Review these instructions before beginning.
•Installed: appropriate field wiring within the
maximum wiring run length for the individual
equipment controller. The maximum
recommended length is 750 feet (229 m) for
18 AWG; 300 feet (91 m) for 22 AWG.
•All wiring must comply with National Electric
Code (NEC) and local regulations.
Figure 1. Typical Temperature Room Unit.

Document No. 129-104
Installation Instructions
December 11, 2017
Page 2 of 4 Siemens Industry, Inc.
Mounting Information
Always mount the room unit vertically.
Locate the room unit:
•according to design specifications and local
regulations.
•where the air circulates around it freely (not in
recessed areas or behind doors).
•allowing a minimum of 4 inches (10 cm) free
space above and below for proper airflow, the
front cover removal tool, and the computer
communication cable.
•away from drafts caused by doors, windows,
outside walls, air registers, pipes, return air
plenums, etc.
•away from heat sources such as strong lights,
fireplaces, direct sunlight, etc.
•on an inside wall (preferably), about 5 feet
(1.5 m) above the finished floor, or per code
(ANSI, ADA, or local regulation).
Drywall Mounting (No Rough-in),
Typical
Base Plate Mounting and Wiring
1. Mark the center (cable) hole and the mounting hole
locations, using the room unit base plate as a
template. See Figure 3.
2. Drill two 3/16-inch (4.8 mm) mounting holes and
mount the two plastic wall anchors flush to below the
wall surface for stable mounting of the device.
3. Cut a 1-inch (25 mm) center hole with a hole saw.
NOTE: It is recommended that you use the
optional Insulating Gasket* on the back
of the Unit Base for hollow wall
installations.
When applying the adhesive-backed
gasket to the back of the unit base, orient
the gasket so that the cut-out arrow
portion of the gasket is in the upper
lefthand quadrant of the unit base. The
sensor base has an UP arrow molded
into the surface in the same quadrant
location (see Figure 6).
*Insulating gaskets are sold in 10-packs
(Part Number 563-102 GSKT KIT).
Figure 2. Insulating Gasket.
4. Pull about three inches (75 mm) of the cable through
the hole in the base plate.
5. Mount the room unit base plate on the wall, noting
the UP arrow:
NOTE: If required, position the back plate behind
the room unit base, aligning the top and
bottom mounting holes, prior to mounting
to the wall:
a. Install the two mounting screws provided, but
do not tighten.
b. Level the room unit base plate for appearance.
c. Tighten the two mounting screws to the room
unit base plate.
6. Cut the cable, leaving about three inches (75 mm)
on the room unit side of the drywall. Ensure that pin
Number 1 connects to the same wire at each end of
the cable.
NOTE: See Figure 2 for details on optional Gasket
application.
Figure 3. Drywall Mounting (No Rough-in), Typical.

Document No. 129-104
Installation Instructions
December 11, 2017
Page 3 of 4
7. Terminate the wires to the termination blocks on the
room unit's base plate. (See Figure 6.)
8. Feed the extra cable back through the hole.
Unit Set-up
Figure 4. Circuit Board
(Located inside Room Unit Cover.
1. If the device has a switch, determine if voltage or
current output is needed.
•For current, set the switch in the down position
(I).
•For voltage, set the switch in the up position (V).
NOTE: The output setting applies to all outputs
(humidity, temperature, and setpoint).
2. If selecting voltage, set the jumper:
•Use the top and middle pins for 0 to 5V.
•Use the bottom and middle pins for 0 to 10V.
NOTE: If the jumper is missing or removed, the
output voltage will default to
0 to 10V.
NOTE: The factory default for displayed temperature
units is °F. To change the display to °C, snip the
wire jumper (0 Ohm resistor R64) on the back of
the PCA.
Figure 5. Changing Display to °C.
3. Snap the room unit cover to the room unit base plate
by first hooking the room unit front to the top latches,
and then rotating the cover downward until it latches.
4. Loosen the safety set screw at the bottom of the
base one or two revolutions to lock the cover to the
base. Be careful not to loosen too far as the screw
can be completely removed from the base.
Electrical Box and Rough-in
Mounting, Typical
1. If a locator is attached to the rough-in device,
remove the locator by removing the two screws and
lightly rocking the locator to pull it free.
2. Untie the twist tie and pull about three inches
(75 mm) of the room unit cable through the hole in
the base plate.
3. Mount the room unit base plate on the wall, noting
the UP arrow:
a. Install the two room unit mounting screws
provided, but do not tighten.
b. Level the room unit base plate for appearance
only.
c. Tighten the two mounting screws to the room
unit base plate.
CAUTION:
Over-tightening may cause the room unit
base plate to crack or bend.
4. Continue with Drywall Mounting (No Rough-in),
Typical, Steps 6 through 8, and Unit Set-up.

Document No. 129-104
Installation Instructions
December 11, 2017
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. APOGEE is a registered trademark or Siemens Industry, Inc. Other product or company names mentioned herein
may be the trademarks of their respective owners. © 2017 Siemens Industry, Inc.
Siemens Industry, Inc.
Building Technologies Division
1000 Deerfield Parkway
Buffalo Grove, IL 60089
USA
+ 1 847-215-1000
Your feedback is important to us. If you have
comments about this document, please send them
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Document No. 129-104
Printed in the USA
Page 4 of 4
CAUTION:
To prevent equipment damage, do the
following:
If the room unit is powered by AC:
•AC Supply must be type NEC Class 2
and earth grounded at the secondary
neutral.
•Room Unit ACN (GND) must be
connected to the controller common.
•If the controller has a floating common,
that common must be connected to the
same earth ground point as the controller
AC supply.
If the room unit is powered by isolated
DC:
•Where power is current limited up to 300
mA, it is not required to earth ground the
controller isolated common.
•Room Unit DC-(GND) must be connected
to the controller common.
CAUTION:
Follow manufacturer’s Installation
Instructions and Wiring Guidelines for
connecting the controller to the Room
Unit.
For Siemens Controllers:
•APOGEE Controllers with common already
earth grounded are TXIO used on PXC
Modular, PXC Compact 36 Expansion and
P1 BIM or PTM used on MBC and RBC.
These do not require the earth ground wire
to be connected tothe controller.
•APOGEE Controllers with floating common
are PXC Compact 16/24/36, MEC, PXM,
LON TEC and PPM. These require the
earth ground wire to be connected to the
controller.
Figure 6. Typical Wiring Base.
(All terminals may not be present.)
Pin No. Function
Units with Blank Front
1 DC+ or ACH
2 DC- or ACN (GND)
3 Temp Output
4 Humidity Output
5* Passive Temp
6* Passive Temp Common
Units with Display
1 DC+ or ACH
2 DC- or ACN (GND)
3 Temp Output
4 Humidity Output
5* Passive Temp
6* Passive Temp Common
7 Setpoint Output
8 Override
9 Override Common
* Not available on “SS” models.
NOTE: If active temperature (0 to 5V/0 to 10V/4 to
20 mA) (Pin 3) rather than passive/resistive
temperature is used, Passive Temp Common
(Pin 6) does not need to be terminated.
The installation is now complete.