Location Considerations For Wireless; Zone Sensors; Height Requirements; Mounting Surfaces - Trane BCHE Installation, Operation And Maintenance Manual

Installation - Controls

Location Considerations for Wireless

Zone Sensors

Placement of the sensor is critical to proper operation (the
receiver is factory mounted). For most installations, barriers
limit proper radio signal strength more than distance. For
best radio transmission range and reliability, mount the
receiver and sensor in line of sight. Where this is not
possible, try to minimize the number of barriers between
the pair of devices. In general, sheetrock walls and ceiling
tiles offer little restriction to the transmission range for the
sensor is as follows:
• Open range: 2,500 ft (packet error rate = 2%)
• Usable range: 200 ft
• Typical range: 75 ft

Height Requirements

It is recommended that you mount the back plate a
maximum distance of 54 inches above the floor. If a parallel
approach by a person in a wheelchair is required, reduce
the maximum height to 48 inches.
Note: Consult section 4.27.3 of the 2002 ADA (Americans
with Disability Act) guideline, and local building
codes, for further details regarding wheelchair
requirements.

Mounting Surfaces

Using the hardware provided, mount the back plate of the
sensor to a flat surface such as sheetrock or plaster, or an
electrical junction box. The sensor must be mounted plumb
for accurate temperature control and to ensure proper air
movement through the sensor.
• If mounting onto sheetrock or plaster, use the plastic
threaded anchors (pre-drilling holes is not usually
necessary) and the two M3.5 x 20 mm mounting
screws.
• For mounting onto an electrical junction box, use the
two 6-32 x 3/4 in. screws.

Zone Sensor Dimensions

Refer the wall-mounted zone sensor dimensions in the
following figure. Position the sensor on an inside wall three
to five feet above the floor and at least 18 inches from the
nearest outside wall. Installing the sensor at a lower height
may give the advantage of monitoring the temperature
closer to the zone, but it also exposes the sensor to airflow
obstructions. Ensure that air flows freely over the sensor.
72
Figure 66. Wall-mounted wired and wireless zone
sensor dimensions
0.31 in.
2.90 in.
0.12 in.
4.68 in. 3.39 in.
0.63 in.
1.45 in.
2.62 in.

Wired Zone Sensor

Refer to the unit wiring schematic for specific wiring details
and point connections.
1. Note the position of the setpoint adjustment knob and
gently pry the adjustment knob from the cover using the
blade of a small screwdriver.
2. Insert the screwdriver blade behind the cover at the top
of the module and carefully pry the cover away from the
base.
3. To mount the sensor back plate: (see the following
figure).
a. Hold the back plate against the mounting surface
and mark the screw locations.
b. Secure the back plate against the mounting surface
using included hardware.
TYP R.07 in.
(R1.9)
TYP 0.24 in.
1.08 in.
2.48 in.
BCX-SVX002A-EN