●Occupancy: In occupancy mode (auto on, auto off with auto reset), the lights or fan turn
on automatically when the space is occupied. The YT-C2 Series sensor switch
automatically turns off the lights or fan after the time delay. If the lights or fan are turned
off manually, automatic on is re-enabled when no motion is detected for one minute. This
way, the lights or fan will remain off if they were deliberately turned off.
IMPORTANT: When installing two YT-C2 Series sensor switches,either sensor can turn
the lights on. For the lights to turn off, both sensors must time out, or you must manually turn
them off.
Adjust the Time Delay
The Time Delay Dial, labeled as TIME, controls how long the light or fan stays on after no
motion is detected. The minimum setting is 15 seconds (fully counterclockwise) and the
maximum setting is 30 minutes (fully clockwise). Adjust the setting as desired for your area.
Adjust the Sensitivity Range of the Sensor
●The Sensor Sensitivity Range Dial, labeled as SENSE, lets you adjust the sensor to avoid
unwanted motion detection such as hallway traffc.
●To decrease sensitivity, turn the setting counterclockwise. To increase sensitivity, turn the
setting clockwise. The sensor’s default setting is 3 (75%). You can adjust it from setting
1 (50%) to setting 5 (100%).
Figure 5: Wire diagram for YT-C2 with regular 3-way wall switch
Adjust the Ambient Light Level
The Ambient Light Level Dial, labeled as LIGHT, lets you adjust the sensor to detect whether
other light sources (such as sunlight) are enough to light the space without turning on the
lights. If you would like the sensor to consider the amount of ambient light in your area, turn
the dial counterclockwise. If you would rather not use the ambient light level, leave it on the
maximum, default setting (5). This will allow the sensor to turn the light on and off regardless
of ambient light.
Lights or Fan Will Not Turn On
Push the On/Off button. The load should turn on. If not:
1. Check the light bulb and/or motor switch on the fan.
2. Turn off power to the circuit and check the wire connections.
Lights or Fan Will Not Turn Off
●Ensure that no motion is occurring in the coverage area until the set time period.
●Ensure that the sensor is at least 6 ft (2 m) away from devices that are a signifcant heat
source (e.g., heater, heater vent, and high wattage light bulbs). Hot air currents and heat
-radiating devices (such as 100W incandescent bulbs) can cause false detection.
●Push the On/Off button to Off. If the lights or fan do not turn off, turn off power to the circuit
and check wire connections.
Lights or Fan Turn Off Too Quickly
The time delay or sensitivity range may be improperly set. Refer to the Adjustment and
Programming section.
Lights or Fan Turn on When Movement Is Detected in Adjacent Areas
If the sensor’s location gives it a view of other areas or hallways,the lights will turn on when
motion is detected in those areas. Try adjusting the sensitivity range (refer to the Adjustment
and Programming section). You may need to move the sensor to another location.
Lights or Fan Turn on When the Area is Unoccupied
The sensor may be mounted too closely to an air conditioning or heating vent. Move the
sensor to another location or close the vent.
TROUBLESHOOTING
Wire according to the wiring diagram below (see fgure 5).
IMPORTANT: The YT-C2 must be installed in the wiring wall box that connects to the load.
INSTALLATION AND WIRING
OPTION A
WIRING YT-C2 WITH REGULAR 3-WAY SWITCH
GROUND wire in each wiring box to the green
terminal on YT-C2
from the lamp (LOAD) to the white wire on the YT-C2
box to the black wire of the YT-C2.
on the YT-C2.
YT-C2 MOTION SENSOR INSTALLATION
Figure 7:
Lift the screwdriver upward
to open the cover.
Adjust Operation Modes
The YT-C2 Series sensor switch has two operation modes:
●Vacancy: In vacancy mode (manual on/off, auto off), press the On/Off button to turn the
light or fan on or off like you would a standard switch. The YT-C2 Series sensor switch
automatically turns off the lights or fan after the time delay.
1. Connect the green or non-insulated (copper)
GROUND wire in each wiring box to the green
terminal on Regular Switch.
2. (SKIP #2 IF NEW INSTALLATION) Traveler #2 has
to be removed and installed where the hot was.
3. Connect TRAVELER 2 to Regular Switch common
screw (dark screw).
4. Connect the POWER wire(HOT) and TRAVELER 1
wire to the Regular Switch screw(light color screw).
REGULAR SWITCH INSTALLATION
Wire according to the wiring diagram below (see fgure 6).
Figure 6: Sensor orientation, wire connections, and wall box assembly when wiring the YT-C2
Series sensor switch with another YT-C2 Series sensor switch
To program the sensor, frst remove the cover:
1. Insert a small fathead screwdriver into the notch
located on the bottom of the cover below the sensor.
2. Gently lift the screwdriver upward to unlatch the
cover (see fgure 7).
ADJUSTMENT AND PROGRAMMING
OPTION B
WIRING YT-C2 WITH ANOTHER YT-C2 3-WAY SWITCH
Blue-Traveler 2
TOP
Red-Load
(power to
lamp or fan)
Black-Traveler 1
White-
Neutral
Ground
Terminal
Dark screw
Traveler 1
Ground
Terminal
Traveler 2
Line(power from
circuit box)
power from
AUX YT-C2
Master YT-C2
TOP
Ground
Terminal
White-
Neutral
Black-Traveler 1
Blue-Traveler 2
to AUX YT-C2
Red-Load
(power to
lamp or fan)
power to
Master YT-C2
AUXILIARY YT-C2
TOP
Blue-Traveler 2
to Master YT-C2
Line(power
from circuit box )
Black-Traveler 1
White-
Neutral
Ground
Terminal
Red – capped
MASTER YT-C2 MOTION SENSOR INSTALLATION
1.Connect the green or non-insulated (copper)
GROUND wire from the circuit to the green
wire on master YT-C2
2.Connect the NEUTRAL wire from the circuit
and from the lamp (LOAD) to the white wire
on the master YT-C2.
3.Connect the lamp power (LOAD) to the red
wire on the master YT-C2.
4.Connect the TRAVELER 1 wire from the black
wire of the auxiliary YT-C2 to the black wire
of the master YT-C2.
5.Connect the TRAVELER 2 wire coming from
the blue wire of two YT-C2 that you are wiring.
1.Connect the green or non-insulated (copper)
GROUND wire from the circuit to the green
wire on master YT-C2
2.Connect the NEUTRAL wire from the circuit
and from the lamp (LOAD) to the white wire
on the master YT-C2.
3.Cap the red wire on the auxiliary YT-C2.
4.Connect the power wire from the circuit box (HOT)
to the black wire on the auxiliary YT-C2 and to the
TRAVELER 1 wire.
5.Connect the TRAVELER 2 wire coming from
the blue wire of two YT-C2 that you are wiring.
AUXILIARY YT-C2 MOTION SENSOR INSTALLATION
1. Insert the switch into the wall box by positioning the lens at the top and the On/Off button
at the bottom.
2. Secure the switch to the wall box with the screws provided.
Attach the new UL listed cover plate(include)and secure it to the wall box with the
4. Restore the power to the circuit by turning on the breaker or replacing the fuse.
Finish Installation
YM2108T
REV 1.1
Note: After the time setting is expired, the switch is set to auto off. If motion is detected
within 30 seconds of auto off, switch will turn on automatically.
Note: If the switch is manually turned off, the motion sensor detection will pause for
15 seconds and then resume normal.
3.
screws provided.
