Installation Instructions

Document No. 129-485
Installation Instructions
November 2, 2015
Page 2 of 3 Siemens Industry, Inc.
WRTS Installation
1. Select a location for the WRTS, following the
standard rules for room temperature sensor
placement. Locate the WRTS no further than
100 feet from the nearest FLNX on its WFLN,
ideally in a location where there are no major
RF obstructions (for example, metal or concrete
walls) between the two.
Always mount the sensor vertically. Locate the
sensor as follows:
• Per design specifications, and local
regulations.
• Where the air circulates around it freely (not
in recessed areas or behind doors).
• Allow a minimum of 4 inches (10 cm) free
space above and below for proper airflow
and the front cover removal tool.
• Away from drafts caused by doors, windows,
outside walls, air registers, return air
plenums, etc.
• Away from heat sources such as strong
lights, fireplaces, direct sunlight, etc.
• On an inside wall, about 5 feet (1.5 m)
above the finished floor.
• The line of sight distance (through walls) to
the nearest FLNX ideally should be less
than 100 feet (30 m).
2. Mount the WRS base plate to the wall.
• If used, leave sufficient room to install the
Lockable Thermostat Guard. See Lockable
Thermostat Guard Technical Instructions
(155-723).
• If mounting to drywall, see Drywall Base
Plate Mounting for instructions.
3. Remove the plastic insulating strip between the
battery in the WRTS battery holder (or insert the
battery) to power-up the WRTS.
NOTE: Even though the WRTS is now
powered, it will stay in a low-power
sleep mode until commissioned.
If the WRTS has an LCD panel, the
displayed value will not change until
the WRTS is bound to an FLNX/TEC.
4. Snap the sensor front to the sensor base plate
by first hooking the sensor front to the top
latches, and then rotating the cover downward
until it latches.
5. 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.
NOTE: There is a perforated label containing
the 16-digit EUID number on the back
of the WRTS. It can be removed and
used for wireless communications with
the WRTS using the TLX.
6. Commission the WRTS per the WFLN Start-up
Procedures (140-0649)
CAUTION:
If a WRTS cannot communicate with its
FLNX for an extended period of time due
to the WFLN not being commissioned or
the FLNX is out of range, remove the
battery to avoid excessive battery drain.
Drywall Base-Plate Mounting (Figure 2)
1. Using the sensor base plate as a template, mark
the top and bottom mounting hole locations for
drywall mounting.
2. Drill two 3/16-inch (4.8 mm) mounting holes and
mount the two wall anchors.
4. Orient the UP arrow on the base plate at the top
and mount on the wall as follows:
a. Level the sensor base plate.
b. Tighten the two mounting screws to the
sensor base plate.
CAUTION:
Over-tightening may cause the sensor
base plate to crack or bend.
The installation is now complete.
Figure 2. Drywall Mounting.