wattstopper UT-305 User manual
Specifications
Voltage 18-28VDC/VAC, half wave rectified AC
Current Consumption
Model UT-305-1, Model UT-305-2..............................30mA
Model UT-305-3 ..........................................................35mA
Power Supply .................................Watt Stopper Power Packs
Operating Temperature..................... 32° to 131°F (0° to 55°C)
Time Delay Adjustment.................................... 5 to 30 minutes
Walk-Through Mode ...3 minutes if no activity after 30 sec.
Test Mode.5 sec. upon intial power-up or DIP switch reset
Ultrasonic Coverage
Model UT-305-1 ................................................ up to 500 ft2
Model UT-305-2 .............................................. up to 1000 ft2
Model UT-305-3 .............................................. up to 2000 ft2
Sensitivity Adjustment ..... Minimum to Maximum (trimpot)
Frequency .................................................................. 40kHz
Installation Instructions
UT-305
Ultrasonic • Low Voltage
Occupancy Sensor
UNIT DESCRIPTION
The WattStopper UT-305 sensors turn lighting systems on and off based on
occupancy.
SmartSet™ technology allows the sensor to be installed with minimal adjustments.
SmartSet automatically adjusts the time delay to usage patterns in the controlled
space.
The UT-305 can be configured to turn lighting on, and hold it on as long as it detects
cccupancy. After no movement is detected for a user specified or SmartSet time (5
to 30 minutes) the lights are switched off. A “walk-through” mode can turn lights
off after only 3 minutes, if no activity is detected after 30 seconds of an occupancy
detection.
The UT-305 operates on 24V supplied by Watt Stopper Power Packs. The sensors
can operate on 24VDC, 24VAC, or half wave rectified AC.
COVERAGE PATTERN
The UT-305 is available in 3 models. Each model has a different size coverage
pattern. The coverage shown represents walking motion at a mounting height of
8 to 10 feet. For building spaces with lower levels of activity or with obstacles and
barriers, coverage size may decrease.
Drawings not to scale.
0'
5'
12'
16'
23'
0'
5'
16'23'45' 12'
12'
16'
23'
12' 16' 23' 45'
UT-300/305-3
UT-300/305-2
UT-300/305-1
UT-300/305-3
HALLWAY
APPLICATION
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PLACEMENT GUIDELINES
Depending upon obstacles such as furniture or partitions, the area of coverage may
be less or more than the sensing distances shown in the coverage pattern. This
must be considered when planning the number of sensors and their placement. It is
also recommended to place the sensor 4 to 6 feet away from air supply ducts.
Mount the sensor to the ceiling. The UT-305 is designed for a ceiling height of about
8-10 feet. Mounting above or below this range will significantly affect the coverage
patterns. As a general rule, each occupant should be able to clearly view the sensor.
Open Ofce Area Coverage: To get complete coverage in an open office area, install
multiple sensors so that there is approximately 20% overlap with each adjacent
sensor’s ultrasonic coverage area.
One UT-300
Coverage Area
20%
Ultrasonic
Overlap
One UT-305
Coverage Area
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Each WattStopper BZ series power
pack can supply power for 4 UT-305
sensors. When using more sensors
than this, multiple power packs are
required.
Refer to the wiring diagram on the next
page for the following procedures:
Connect the low voltage:
• REDwire(+24VDC)frompowerpack
tothe+24V terminal on the sensor.
• BLACKwire(Return)frompower
pack to Common terminal on the
sensor.
Wiring a SINGLE LIGHTING LOAD CONTROLLED BY OCCUPANCY–connect:
• BLUEwirefrompowerpacktoControlOutterminalonsensor.
To add a MANUALSWITCHsuchastheLVS-1MomentaryToggleSwitch,orRS2-3
LowVoltageMomentarySwitchtotheaboveapplications–connect:
• WirefromonesideofswitchtoCommonterminalonsensor.
• WirefromothersideofswitchtoManSwitchterminalonsensor.
WIRING DIRECTIONS
CAUTION
TURN POWER OFF AT THE CIRCUIT BREAKER BEFORE
INSTALLING POWER PACKS OR SENSORS.
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UT-305
Ultrasonic
Occupancy Sensor
U.S.Patents:
5,640,113
Patent Pending
40kHz Ultrasonic
+24VDC/VAC
Connect to Watt Stopper
Class 2 Power Packs
For Indoor Use Only
03624r2
Control Out.
Man. Switch
+24V
Common
LISTED
88T9
Appliance
Control
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800.879.8585
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White
Black
Red
Line Voltage
Wire Color Legend
Load #1
Load #2
(Optional)
UT-305
Rear Housing
Depluggable
Terminal
Front Cover
Ceiling
Spring Clips (2)
Blue
Control Out
+24V
Common
Low Voltage
Class 2
Line
Voltage
Line
Neutral Feed Through
Power Pack
Black
Red
#1 #2
Line Voltage
Switches
Standard wiring with local off switch
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Manual-On wiring with low voltage momentary switch
LVS-1
Load
Rear Housing
Depluggable
Terminal
Front Cover
Ceiling
Spring Clips (2)
Blue
Control Out
Black
+24V
Low Voltage
Class 2 Line Voltage
Line
Neutral Feed Through
Power Pack
Man.Switch
Red
UT-305
Common
For low voltage
momentary switch, set
DIP switch #1 ON
Man.Switch
Jumper
Back
of
LVS-1
Common
White
Black
Red
Line Voltage
Wire Color Legend
Rear
housing
Front
cover
Ceiling
Spring clips (2)
Depluggable terminal
MOUNTING THE SENSOR
Directly to Ceiling
1. Attach the plastic spring clips to
the edge of the sensor in the slots
provided.
2. Cut a 3.5” to 4” round hole in
the acoustic ceiling tile at the
mounting location. A 3.5” hole is
recommended for a secure fit.
3. Pull the low voltage wire from the
power pack to the sensor through
the hole.
4. Connect the low voltage wires to
the appropriate terminals on the
sensor.
5. Push the sensor up through the
hole until the Spring Clips hold the
sensor securely in place.
6. Snap the front cover onto the
sensor.
Using an Octagonal J-Box
1. Pull the low voltage wires from the
power pack into the J-Box through
the conduit knockout.
2. Connect the low voltage wires to
the appropriate terminals on the
sensor.
3. Loosentheappliancemounting
screws attached to the J-Box
4. Align the sensor in the J-Box so
that the mounting screws on the
box match the key holes on the
sensor’s rear housing.
5. Push the sensor up into the J-Box and twist it so that the mounting screws are
seated in the keyhole slots.
6. Tighten the two screws to secure the sensor to the J-Box.
7. Snap the front cover onto the sensor.
Ceiling Mount
Depluggable terminal
Rear
Housing
4" Octagonal J-Box
(at least 1.5" deep)
Front
Cover
Ceiling
Screws
J-Box Mount
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SENSOR ADJUSTMENT
The sensors are factory preset to allow for quick installation in most applications.
Verification of proper wiring or coverage, or customizing the sensor’s settings can
be done using the following procedures. To make adjustments, open the Front Cover
with a small screwdriver.
Before making
adjustments, make
sure the office
furniture is installed,
lighting circuits are
turned on, and the
HVAC systems are in
the overridden/ on
position. VAV systems
should be set to their
highest airflow. Set
the Time Delay to the
desired settings. See
“DIP Switch Setting”,
next page.
To Test Occupancy Sensors
1. EnsuretheUltrasonicActivityLEDisenabled(DIPswitch6ON).
2. Ensure the Time Delay is set for Test Mode* using the “5 seconds/SmartSet”
setting. (DIP switches 3, 4, & 5 are OFF).
3. Ensure that the Ultrasonic Sensitivity trimpot is set to about 90%, clockwise.
4. Remainstill.TheLEDshouldnotash.Thelightsshouldturnoffafter5seconds.
(If not, see “Troubleshooting.”)
5. Move about the coverage area. The lights should come on. Adjust the Ultrasonic
Sensitivityasnecessarytoprovidethedesiredcoverage(GreenLEDindicates
activation from the ultrasonic sensor).
When testing and adjustment is complete, reset DIP Switches to the desired
settings, and replace the cover on the sensor.
* Test Mode is a temporary state that starts when you first set the sensor’s DIP
switches for the “5 sec/SmartSet mode” (switches 3, 4, 5 OFF). If you need to
invoke the Test Mode and the DIP switches are already set for 5sec/SmartSet,
toggle DIP switch 5 ON then back to the OFF position. This provides a 5 minute
test period. During the test period, the Time Delay is only 5 seconds.
Keyhole slots
(for mounting to
4" octagonal box)
Double gang
mudring
mounting holes
DIP switches
Ultrasonic
sensitivity
trimpot
ON
12345678
ECE
Ultrasonic
transducer
cones
Ultrasonic
activity
LED (Green)
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DIP SWITCH SETTING
The UT-305 has 6 DIP switches. They are used
to set manual/automatic on/off functions, time
delayandsensoractivationLEDsettings.
On Mode: Switch 1
The Manual ON function is facilitated by
installing a momentary switch such as a Watt
StopperLVS-1MomentaryToggleSwitch,or
RS2-3LowVoltageMomentarySwitch.This
switch connects to the sensor’s Manual (Man.)
Switch and Common terminals as shown in the
wiring diagram. Each time the switch is pressed,
the load changes state. The sensor’s operation
as related to the manually operated switch is
determined by the setting for DIP switch 1.
Manual On: In this mode, the switch is required
to turn on the load. The sensor is then used to
keep the load on, based on occupant activity.
After the time delay ends the manual switch
must be used to turn the load on, if there is no
movement detected within the 30 second re-
trigger period.
Automatic On: This mode uses occupancy as
well as switch activation to turn the load ON. A
manual switch provides the following additional
functionality:
a. The load can be turned ON by manual switch
activation and it stays on as long as occupancy
is detected. The sensor time delay operates as
programmed. When the load turns OFF due to
lack of occupancy detection, the load can be
turned ON again by occupancy detection or switch activation.
b. Activating the manual switch while the load is ON turns the load OFF.
• WhentheloadisturnedOFFmanually,aslongasthesensorcontinuestodetect
occupancy the load stays OFF. Five minutes after the last occupancy detection,
the lights stay off and the sensor reverts to the automatic-on mode.
• WhentheloadisturnedOFFmanually,pressingtheswitchagainturnstheload
Logic Conguration Chart
5 sec/Auto
10 minutes
10 minutes
15 minutes
15 minutes
20 minutes
30 minutes
5 minutes
345
Time Delay
= walk-through mode
LED
Disabled
Enabled
6
= ON
= OFF
= Factory Setting
1
Auto On
Manual On
On Mode
2
Normal
Override
Override
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ON and the sensor reverts to the automatic-on mode.
• Oncethesensorreturnstoautomatic-onmode,eithertheswitchoroccupancy
detection can turn the load ON.
Override: Switch 2
Tooverrideallsensorfunctions,setDIPswitch2totheONposition.ThegreenLED
comes on and stays on for the duration of the override.
This bypasses the occupancy detection control functions of the sensor, but still
allows the lights to be manually controlled with a light switch, if one is installed.
Time Delay: Switches 3, 4, 5
The sensor will hold the lights on as long as occupancy is detected. The time delay
countdown starts when no motion is detected. After no motion is detected for the
length of the time delay, the sensor will turn the lights off. The sensor can select the
time delay using SmartSet, or you can select a fixed time delay.
• SmartSetrecordsoccupancypatternsandusesthishistorytochooseanoptimal
time delay from 5 to 30 minutes. SmartSet behavior starts immediately and is
refined continually as history is collected.
Walk-through mode turns the lights off three minutes after the area is initially
occupied, if no motion is detected after the first 30 seconds. If motion continues
beyond the first 30 seconds, the selected time delay applies.
LED: Switch 6
Whenenabled,thegreenUltrasonicActivityLEDonthesensorwilllightwhenthe
sensor detects motion.
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