Datasheet

Liebert
®
MPX
™
Installation and Assembly
18
3.3 Temperature/Humidity Sensor Installation—Optional
Optional Liebert
®
SN temperature/humidity sensors are available to assist in monitoring conditions
in the rack. Liebert SN sensors are designed for installation in a Knurr
®
Miracel
™
without tools, but
each may be placed in any area to monitor temperature and humidity levels. Each connects to the
Liebert RPC
™
, which makes readings available to Liebert MPX
™
monitoring methods.
Only one mounting method is addressed in this manual: attaching a single sensor with a bracket to a
Knurr Miracel frame member. For details on other mounting locations and methods, refer to the
Liebert SN quick-start guide, SL-20840, or to the Liebert RPC user manual, SL-20825. Each is
available at Liebert’s Web site, www.liebert.com
To install a sensor on a Knurr
®
Miracel
™
frame member:
1. Assemble the Liebert SN and sensor bracket:
a. Insert the sensor bracket base into one end of the sensor support as shown in Figure 16.
b. Snap the sensor into the other end of the sensor support.
2. Choose where in the rack to install the sensor assembly. Emerson recommends placing the sensor
in the area that is likely to be warmest.
3. Hold the sensor bracket on a T-slot on the Knurr Miracel frame where the sensor will be placed.
4. Insert the included quarter-turn fastener through the rectangular hole in the sensor bracket base
and into the T-slot (see Figure 16).
5. Turn the fastener clockwise 90 degrees, a quarter of a turn.
6. Route the sensor cable to the Liebert RPC and insert it into the card’s external sensor port.
For further details, refer to the Liebert RPC user manual, SL-20825, which shipped with the card
and is available at Liebert’s Web site: www.liebert.com
Figure 16 Temperature/humidity sensor mounting
Sensor Bracket Base
Quarter-Turn Fastener
Rectangular protrusion passes
through bracket slot (above) and
into T-slot on Knurr Miracel frame
member (below).
Sensor Support
Liebert SN Sensor
Liebert SN
Sensor Cable