5) Loosen the appliance mounting screws attached to the octogonal junction
box.
6) Align the sensor in the junction box so that the mounting screws on the
box line up with the slotted holes on the sensor's housing.
7) Push the sensor up into the junction box carefully and twist it so that the
mounting screws are seated in the slots.
8) Tighten the two screws to secure the sensor to the junction box.
9) Adjust the settings of the sensor if required by accessing the controls on
the housing (see Figure-6). See the Settings Section for customizing the
performance of the sensor.
10) Snap the front cover onto the sensor housing and restore circuit power.
NOTE:THERE IS A 45 SECOND WARM-UP PERIOD WHEN POWER IS FIRST APPLIED.
♦SETTINGS
1) The 6420 sensor has 9 DIP switches under the cover that can be used to adjust the
sensitivity, time delay, walk-through mode, vacancy mode, audible alarm, visual alarm,
and Hold ON features. See Figure-7 for all available DIP switch settings and defaults.
NOTE:THE SENSORS ARE PRESET AT THE FACTORY TO ALLOW FOR QUICK
INSTALLATION IN MOST APPLICATIONS.
NOTE:BEFORE MAKING ADJUSTMENTS, BE SURE OFFICE FURNITURE IS
INSTALLED, LIGHTING CIRCUITS ARE TURNED ON, AND HVAC SYSTEMS ARE IN THE
OVERRIDDEN/ON POSITION.
Sensitivity Setting: Switch 1
50% - Sensor's coverage is smaller; about half of the widest range.
100% - Maximum range of the Sensor's PIR coverage (1,200 sq-ft).
Time Delay: Switches 2, 3, 4
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 set time delay, the sensor will turn the lights off. The sensor can select the time
delay using Autoset, or you can select a fixed time delay.
Autoset records occupancy patterns and uses this history to choose an optimal time
delay from 5 seconds to 30 minutes. Autoset behavior starts immediately and is refined
continually has data is collected.
Walk Through Mode: Switch 5
Turns the lights off 3 minutes after initially occupied, if no motion is detected after the
first 30 seconds. If motion continues beyond the first 30 seconds, the selected time
delay will apply. Only when the fixed time delay is set greater than or equal to 5 minutes
is the walk-through mode in effect.
Vacancy Mode: Switch 6
The manual-on function is achieved by using a momentary switch. The switch is
connected to the sensor's "Manual ON" and "Common" terminals. When the
momentary switch is pressed, the load will revert to the opposite state. With the
vacancy mode enabled, the momentary switch must be pressed upon entering the room
to turn the lights on. When the room is unoccupied and the time delay ends, the
momentary switch must be pressed to turn the lights on again, if there is no movement
detected within the first 30-second period.
With the vacancy mode disabled, the lights can be turned on using the momentary
switch and will stay on as long as motion is detected. After which, the set time delay will
apply. Pressing the momentary switch while the load is on will turn the load off and as
long as motion is detected, the load will stay off. 5 minutes after no motion is detected,
the sensor will revert back to the automatic-on mode.
Audible Alert: Switch 7
When this feature is enabled, 1 minute, 30 seconds, or 10 seconds before the time
delay expires, the sensor buzzer will "chirp" indicating the time delay is almost over.
Visible Alert: Switch 8
When this feature is enabled, 1 minute before the time delay expires, the sensor will
flash the load once indicating the time delay is almost over.
Hold ON: Switch 9
When this feature is enabled, all sensing functions are bypassed and a momentary
switch (if installed) will be invalid. The load will stay on until the DIP switch is disabled.
Ambient Light Level Adjustment
To adjust the ambient light level (to accomodate amount of
daylight entering the room), rotate the "Light" trimpot as needed.
Turn towards the "-" if enough daylight enters the room for it's
intended use (lights will not turn on when motion is detected).
Turn towards the "+" if lights should turn on regardless of amount
of available daylight. Range is 100Lux to Daylight.
♦TROUBLESHOOTING
Lights to not turn on with occupancy.
PIR Activity LED does not flash:
1) Check that the circuit breaker has been turned back on.
2) Be sure that the PIR Sensitivity is set for 100% (DIP Switch 1 to ON)
3) Check all sensor and power pack wire connections.
4) Check for 24VDC input to the sensor between the red and the black low-voltage
wires.
●If 24VDC is present, replace the sensor.
●If 24VDC is not present, check the high-voltage connections to the power pack.
●If high-voltage connections are good, and high-voltage is present at the proper value,
replace the power pack.
PIR Activity LED flashes:
1) If the sensor's Light Level trimpot has been turned to the "-", the lights may be held
off by the sensor because of the available ambient light in the coverage area. In this
case, try covering the PIR Sensor lens and the PIR Activity LED with your hand. If the
lights turn on, readjust the Light Level trimpot towards the "+" as needed for the desired
operation.
2) Check all sensor and power pack wire connections.
3) Check for 24VDC at the power pack's Control (blue wire) connection to the sensor
while the sensor is activated. If there is no voltage, replace the sensor. If there is
voltage, replace the power pack.
Lights to not turn off automatically.
1) Sensor may be experiencing activations from some type of interference outside the
coverage area. (See Unwanted Sensor Activations below.)
2) Check all sensor and power pack wire connections.
3) Disconnect power pack blue wire.
●If lights do not turn off, replace the power pack and reconnect wiring.
●If lights turn off, the problem may be the sensor or wiring between the sensor and
power pack.
4) Reconnect the blue wire.
5) Turn sensitivity and time delay to minimum, and allow the sensor to time out.
●If lights turn off, the sensor is working properly. Adjust sensitivity and time delay for
the sensor.
Unwanted Sensor Activations (LED flashes).
Possible Causes:
1) Sensor located too close to HVAC or VAV vents with heavy air flow.
2) The PIR sensitivity may be set too high.
Possible Solutions:
1) Relocate the sensor.
3) Set PIR Sensitivity to 50% (DIP Switch 1 to OFF).
♦WARRANTY
Model 6420 360º Passive Infrared Low-Voltage Occupancy Sensor INSTRUCTIONS
THREE YEAR LIMITED WARRANTY
If this product fails because of a manufacturing defect within three years after purchase,
we will replace it at no charge. Our warranty does not cover damage caused by accident,
abuse, or misuse. We assume no further liability with respect to the sale or use of this
product.
This warranty is in lieu of all other warranties, expressed or implied, including the
warranty of merchantability. We make no warranty with respect to the fitness of any
goods for the user's particular application. This warranty gives you specific legal rights,
and you may also have other rights which vary from state to state.
Figure-6
Figure-7
Light
