ACORN ENGINEERING FIELD SERVICE
TOLL FREE
800-743-8259 •
LOCAL
626-855-4866 •
FAX
626-855-4863
INSTALLATION, OPERATIONS & MAINTENANCE MANUAL
Please visit
www.acorneng.com
for most current specifications.
-SO Sensor Operation
Range Adjustment
3. Move hand in front of sensor to distance of 2” to 4”
within 5 seconds and wait until red light flashes
quickly.
1. Make sure power supply is disconnected from
sensor and make short circuit on red wires.
See DETAIL A.
2. Connect power supply to sensor. Red light should
be flashing.
5. Hold hand at desired sensing distance until red light
stops flashing and solenoid activates.
See DETAIL C.
4. Move hand to desired sensing distance.
See DETAIL B.
DETAIL A
DETAIL B
DETAIL C
Transformer must
be plugged into a
GFI protected
circuit. Fixture must
be earth grounded
per N.E.C. or
applicable codes.
Jumper
By Others
-SO Sensor Operation or -PPZ Programmable Piezo Pushbutton
SENSOR OPERATION & CONNECTIONS
®
MERIDIAN 3791-LO
Part #: 9927-140-001
Page 12 of 28
Date: 03/06/19
-SO SENSOR
-PPZ PUSHBUTTON
RED
BLUE
RED
BLUE
TRANSFORMER
SOLENOID VALVE
