Johnson Controls WRZ Series Installation Manual page 3

• Avoid metal obstructions, including equipment rooms
and elevator shafts, and concrete or brick walls
between the sensor and the ZFR or ZFR Pro Series
Router, or WRZ-7860 Receiver.
• Do not locate the sensor in recessed areas or metal
enclosures.
• In mesh network applications, install the sensors in
range of two or more ZFR or ZFR Pro Series Routers.
Redundancy in the layout provides the best reliability in
wireless installations.
• Do not mount the sensor closer than 0.61 m (2 ft) or
farther than 30 m (100 ft) from the ZFR or ZFR Pro
Series Router, or 45 m (150 ft) from the WRZ-7860
Receiver.
• The optimum indoor line-of-sight transmission range
between the sensor and the ZFR or ZFR Pro Series
Router is 15 m (50 ft).
Installing the WRZ Series Sensor
About this task:
Use the factory-installed double-sided adhesive foam tape
on the back of the device to surface mount the WRZ Series
Sensor. To mount the sensor base with adhesive foam
tape, complete the following steps :
1. Clean the mounting surface to ensure that the
adhesive foam tape sticks to the surface.
Note: The mounting surface, mounting base,
and ambient temperature must be at least 10°C
(50°F) when you mount the sensor base with
adhesive foam tape.
2. Remove the sensor housing from its mounting
base as shown in the following figure.
3. Peel off the protective paper from the factory-
installed strips of adhesive foam tape on the back
of the mounting base.
4. When positioned correctly, the arrow between
the terminal slots on the inside of the mounting
base points up. Ensure that the mounting base is
upright, tamper-resistant set screw on top, and
press the base firmly onto the clean mounting
surface.
During normal operation, the WRZ Series Sensor is
in a suspended sleep mode to conserve battery life.
The sensor periodically wakes up, reads its sensor
values, and sends the sensor data to the associated
controller. The wake-up time varies, depending
on the sensor type and changes in value. When
you adjust the setpoint dial or press the manual
occupancy override button, the sensor wakes up
immediately and sends its data. See
WRZ Series Sensor for Operation
Figure 3: Removal of the Sensor housing from its mounting
base
Removing a mounting base installed with
double-sided adhesive foam tape
About this task:
Preparing the
To remove or relocate a sensor mounted with double-
sided adhesive foam tape, complete the following steps:
1.
2.
3.
WRZ Series Wireless Room Sensors Installation Guide
Important: Do not turn on the WRZ Series
Sensor until an installed receiver or controller
operates in the same RF range. If this condition
is not met, the sensor uses a higher-than-
normal battery current as it attempts to find
a receiver or controller in range, resulting in
reduced battery life.
Important: During start up and commissioning
or in a power-outage situation, the associated
controller may be shut down for extended
periods of time. To further conserve on battery
life, the WRZ Series Sensor adjusts its rejoin
attempt time to much longer periods, 6 times
every 2 minutes for the first 10 minutes, then
once every 30 minutes for 72 hours, and then
once for each day thereafter. This may cause
the sensor to be offline to the system until it
rejoins. When you adjust the setpoint or press
the manual occupancy override button, the
sensor wakes up and begins its normal update
sequence.
Remove the sensor housing from its mounting
base. See Figure 3.
Carefully twist the base off of the surface to remove
the mounting base from the mounting surface.
Remove the adhesive foam tape from the
mounting base and clean the mounting base to
remove any leftover adhesive.
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