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Installation—Sensors
•
Metal barriers between the receiver and the sensor (for
example, plastered walls with metal lathe or metal roof
decks)
•
Thick, solid concrete walls between the receiver and
the sensor
•
Placing the sensor inside metal enclosures
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.
Before beginning installation, consider the location
considerations below. Also, refer to the unit wiring
schematic for specific wiring details and point
connections.
Location Considerations
Avoid mounting the sensor in an area subject to the
following conditions:
•
Dead spots, such as behind doors or in corners that do
not allow free air circulation.
•
Air drafts from stairwells, outside doors, or
unsectioned hollow walls.
•
Radiant heat from the sun, fireplaces, appliances, etc.
•
Airflow from adjacent zones or other units.
•
Unheated or uncooled spaces behind the controller,
such as outside walls or unoccupied spaces.
•
Concealed pipes, air ducts, or chimneys in partition
spaces behind the controller.
Location Considerations for Wireless Zone
Sensors
Placement of the sensor is critical to proper operation (the
receiver is factory mounted on fan-coil units). For most
installations, barriers limit proper radio signal strength
more than distance. For best radio transmission range and
30
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
Fan Mode Switch Installation
The fan mode switch ships loose inside the unit accessory
bag. Follow the steps below to install the fan mode switch.
Items needed:
2 x 4 electrical junction box
1. Remove the brown wire if not using a field-supplied
damper.
2. Remove the terminals, cut and strip wires as required
for installation.
3. Level and position a 2 x 4 electrical junction box.
4. Follow the instructions given in
Control Interconnection Wiring, " p. 41
wires as shown in the wiring diagram. Refer to the
typical wiring diagram or to the unit specific diagram
on the unit.
5. Position the fan mode switch over the junction box
with the two screws supplied.
Zone Sensor Installation
Follow the procedure below to install the wired zone
sensor module.
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:
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.
4. To install the zone sensor module to a standard
junction box:
a. Level and install a 2 x 4-in. junction box (installer
supplied) vertically on the wall.
b. Pull the control wires through the cutout. Attach the
module to the wall using the screws provided.
5. Strip the insulation on the interconnection wires back
0.25-inch and connect to TB1 (for wired sensors).
6. Screw down the terminal blocks (for wired sensors).
7. To replace the cover:
"Wall-Mounted
and route the
UV-SVN02C-EN
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