Acorn Meridian 3792 Instruction manual

ACORN ENGINEERING FIELD SERVICE
TOLL FREE 800-743-8259 • LOCAL 626-855-4866 • FAX [phone]
INSTALLATION, OPERATIONS & MAINTENANCE MANUAL
®
MERIDIAN 3792
Part #: 9927-142-001
Please visit www.acorneng.com
for most current specifications.
A C O R N E N G I N E E R I N G C O M P A N Y
P. O . B O X 3 5 2 7 • C I T Y O F I N D U S T R Y, C A 91 7 4 4 U . S . A .
T O L L F R E E 8 0 0 - 4 8 8 - 8 9 9 9 : : L O C A L 6 2 6 - 3 3 6 - 4 5 6 1
FA X 6 2 6 - 9 6 1 - 2 2 0 0 : : w w w. a c o r n e n g . c o m
A C O R N E N G I N E E R I N G C O M P A N Y
P. O . B O X 3 5 2 7 • C I T Y O F I N D U S T R Y, C A 91 7 4 4 U . S . A .
T O L L F R E E 8 0 0 - 4 8 8 - 8 9 9 9 : : L O C A L 6 2 6 - 3 3 6 - 4 5 6 1
FA X 6 2 6 - 9 6 1 - 2 2 0 0 : : w w w. a c o r n e n g . c o m
TABLE OF CONTENTS
Accessibility Overview ....................................3
Prior to Installation.......................................2
Dimensional Data........................................4
Rough-Ins . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 - 7
Troubleshooting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 - 22
Cleaning and Maintenance................................23
Components & Repair Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 - 30
Warranty Information ....................................31
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 - 17
Piezo Adjustment. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 - 20
REQUIRED ITEMS FOR INSTALLATION - NOT SUPPLIED
®
MERIDIAN
MODEL
3792
®
CORTERRA
ADA-COMPLIANT
KURVE DUAL BASIN
?7/16" Hex Wrench
?Chalk Line
?Hammer
?Carpenters Level
?1/2" NPS Supply Angle Stops And 1/2" NPS
Supply Flex Hose(s)
?1/4” Slotted Tip Screwdriver For Metering
Adjustment
?Teflon Tape
?Plumbers Putty
?Fixture Wall Anchors and Anchoring Hardware
(and Appropriate Tools) - For 3/8" Punching
(13 Count)
?Driver For 1/4” Shank Bit - For Center Reject Bit
Revised: 03/07/19

ACORN ENGINEERING FIELD SERVICE
TOLL FREE 800-743-8259 • LOCAL 626-855-4866 • FAX [phone]
INSTALLATION, OPERATIONS & MAINTENANCE MANUAL
®
MERIDIAN 3792
Please visit www.acorneng.com
for most current specifications.
Page 2 of 31
Part #: 9927-142-001
Important: Some options may slightly alter installation. To ensure proper installation
review the manual thoroughly and verify rough-ins before beginning any work. File this
manual with the owner or maintenance personnel upon completion of installation.
ANSI, UFAS or ADA compliance is subject to the interpretation and requirements of the
local code authority and is the responsibility of the installer for verification.
Provide 110-120VAC/60Hz/3A (MAX) electrical receptacle for factory supplied
120VAC/9VDC, 100mA plug-in transformer.
NOTE: Receptacle(s) must be wired to a GFCI protected circuit. Fixture must be earth
grounded per N.E.C. (National Electrical Code).
Teflon tape is recommended on all threaded waste and supply connections to reduce the
possibility of leaks.
Industry standard wall backing, for wall hung fixtures, is required. Installer provided wall
anchors and wall anchoring hardware must be appropriate for wall construction, and
have a minimum pull-out rating of 1000 lbs. (453.6 kg).
Prior to installation, supply lines must be flushed of all foreign material such as pipe
dope, chips, or solder. Debris or foreign material in water supply may damage valve.
Single Temp Valve Assembly: Recommended working water pressure is 30 psi (2.07
bars) minimum to 100 psi (6.89 bars) maximum. Maximum temperature is 130°F
(54.4°C). Maximum outlet temperature is recommended is 105°F (40.6°C). Valve
assembly must be drained prior to being subjected to freezing temperatures. A
checkstop is provided with this valve assembly.
T/P Mixing Valve Assembly: Recommended working water pressure is 30 psi (2.07 bars)
minimum to 125 psi (8.62 bars) maximum. Maximum hot water temperature is 180°F
(82°C). Temperature adjustment range is 85-115°F (29-46°C). Valve assembly must be
drained prior to being subjected to freezing temperatures. The valve assembly has
checks integral to the inlets however, angle stops are to be provided by the installer.
Revised: 03/07/19

ACORN ENGINEERING FIELD SERVICE
TOLL FREE 800-743-8259 • LOCAL 626-855-4866 • FAX [phone]
INSTALLATION, OPERATIONS & MAINTENANCE MANUAL
®
MERIDIAN 3792
Please visit www.acorneng.com
for most current specifications.
Page 3 of 31
Part #: 9927-142-001
ACCESSIBILITY OVERVIEW
ADA ages
6 thru 12
ADA
Adult
34" RIM
MAX.
4"
9"
121
2"
21"
21"
183
4"
27"
MIN.
21"
121
2"
4"
31" RIM
MAX.
24"
MIN.
21"
153
4"
21"
121
2"
4"
33" RIM
MAX.
29"
MIN.
21"
173
4"
9"
9"
OBC
Revised: 03/07/19

ACORN ENGINEERING FIELD SERVICE
TOLL FREE 800-743-8259 • LOCAL 626-855-4866 • FAX [phone]
INSTALLATION, OPERATIONS & MAINTENANCE MANUAL
®
MERIDIAN 3792
Please visit www.acorneng.com
for most current specifications.
Page 4 of 31
DIMENSIONAL DATA
15 "
53
4"
55"
221
2"
21"
4"
371
4"
11"
161
4"
Part #: 9927-142-001 Revised: 03/07/19

ACORN ENGINEERING FIELD SERVICE
TOLL FREE 800-743-8259 • LOCAL 626-855-4866 • FAX [phone]
INSTALLATION, OPERATIONS & MAINTENANCE MANUAL
®
MERIDIAN 3792
Please visit www.acorneng.com
for most current specifications.
Page 5 of 31
Part #: 9927-142-001
ROUGH-IN DIMENSIONS -ADA (Adult)
E
D
C
B
A
-120VAC, 60 Hz, 3A (Max.) GFCI Protected, Electrical Receptacle.
- 3/8" Diameter Mounting Holes, For Anchoring Points, 10 Places.
-Supply Stub-Outs with Stops for Valve 1/2" NPT Hot & Cold Supply Inlets.
-Waste Outlet for 1-1/2" O.D. P-Trap.
-Frame "V" Notch.
241
2"
34"
DECK
HEIGHT
24"
25"
3"
6" 4"
197
8"
273
8"
287
8"
327
8"
23"
TYP.
19" 15"
TYP.
211
2"
TYP.
D
A
E
B
C
H C
Revised: 03/07/19

ACORN ENGINEERING FIELD SERVICE
TOLL FREE 800-743-8259 • LOCAL 626-855-4866 • FAX [phone]
INSTALLATION, OPERATIONS & MAINTENANCE MANUAL
®
MERIDIAN 3792
Please visit www.acorneng.com
for most current specifications.
Page 6 of 31
Part #: 9927-142-001
ROUGH-IN DIMENSIONS -ADA
AGES 6 THRU 12 YEARS
E
D
C
B
A
-120VAC, 60 Hz, 3A (Max.) GFCI Protected, Electrical Receptacle.
-Waste Outlet for 1-1/2" O.D. P-Trap.
- 3/8" Diameter Mounting Holes, For Anchoring Points, 10 Places.
-Supply Stub-Outs with Stops for Valve 1/2" NPT Hot & Cold Supply Inlets.
-Frame "V" Notch.
211
2"
31"
DECK
HEIGHT
21"
22"
3"
6" 4"
167
8"
243
8"
257
8"
297
8"
23"
TYP.
19" 15"
TYP.
211
2"
TYP.
D
A
E
B
C
H C
Revised: 03/07/19

ACORN ENGINEERING FIELD SERVICE
TOLL FREE 800-743-8259 • LOCAL 626-855-4866 • FAX [phone]
INSTALLATION, OPERATIONS & MAINTENANCE MANUAL
®
MERIDIAN 3792
Please visit www.acorneng.com
for most current specifications.
Page 7 of 31
Part #: 9927-142-001
ROUGH-IN DIMENSIONS -OBC
ONTARIO BUILDING CODE
E
D
C
B
A
-Frame "V" Notch.
-120VAC, 60 Hz, 3A (Max.) GFCI Protected, Electrical Receptacle.
-Waste Outlet for 1-1/2" O.D. P-Trap.
-Supply Stub-Outs with Stops for Valve 1/2" NPT Hot & Cold Supply Inlets.
- 3/8" Diameter Mounting Holes, For Anchoring Points, 10 Places.
231
2"
33"
DECK
HEIGHT
23"
24"
3"
6" 4"
187
8"
263
8"
277
8"
317
8"
23"
TYP.
19" 15"
TYP.
211
2"
TYP.
D
A
E
B
C
H C
Revised: 03/07/19

ACORN ENGINEERING FIELD SERVICE
TOLL FREE 800-743-8259 • LOCAL 626-855-4866 • FAX [phone]
INSTALLATION, OPERATIONS & MAINTENANCE MANUAL
®
MERIDIAN 3792
Please visit www.acorneng.com
for most current specifications.
FIXTURE ANCHORING
DETAIL A
DETAIL C
Part #: 9927-142-001
Disassemble access panels and deck
1assembly from frame. Anchor frame to wall
using 3/8” mounting hardware by others.
-See DETAIL A. Place deck assembly on frame,
2making sure angle engages behind frame joggle.
-See DETAIL B. Assemble underside of bowls to
frame with 1/4”-20 x 1/2” hex bolts, 1/4” lock
washers, and 1/4” fender washers provided.
-See DETAIL C. Assemble deck support flanges to
outside of frame using 1/4”-20 x 1” hex bolts, 1/4”
lock washers and 1/4” flat washers provided.
DETAIL
B
Angle
Frame Joggle
Deck Support
Flanges
Page 8 of 31 Revised: 03/07/19

ACORN ENGINEERING FIELD SERVICE
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INSTALLATION, OPERATIONS & MAINTENANCE MANUAL
®
MERIDIAN 3792
Please visit www.acorneng.com
for most current specifications.
1
2
3
4
4
3
5
HINT: Teflon tape is recommended on all threaded waste and
supply connections.
NOTE: Continuous waste assembly will require field cutting and
fitting by the installer.
141
4"81
4"
6"
4"
Ref.
221
2"
Part #: 9927-142-001
Install grid strainer and close elbow to bowl
3using plumber's putty.
Á Rubber Gasket
 Flat Fiber Washer
à 1-1/2" -16 UNI Rough Chrome
Brass Jam Nut
Ä 1-1/2"-16 x 1-1/4" UNI Close Ell
with 3/8" NPT Clean-Out Plug
À Grid Strainer w/ 1-1/2" -16
UNE Threads
Assemble continuous waste piping using teflon
4tape on all threaded connections and make up
waste connections to 1-1/2” P-Trap.
Page 9 of 31 Revised: 03/07/19

ACORN ENGINEERING FIELD SERVICE
TOLL FREE 800-743-8259 • LOCAL 626-855-4866 • FAX [phone]
INSTALLATION, OPERATIONS & MAINTENANCE MANUAL
®
MERIDIAN 3792
Please visit www.acorneng.com
for most current specifications.
Part #: 9927-142-001
VALVE INSTALLATION
MX-TP VALVE (-H HAND OPERATED SHOWN)
!IMPORTANT
-ST SINGLE TEMPERATURE VALVE
as pipe dope, pipe chips,
supply lines must be flushed
supply connections, the
of all foreign material such
Before making up the
solder, sand, etc.
for MX-TP Valve, install valve using 1/4” Flat
AWasher, 1/4” Lock Washer and 1/4”-20 Hex Nut
provided. Flush supply lines. Connect installer
1/2” NPS supply hoses to valve.
supply lines. Connect installer provided 1/2”NPS hose to valve.
for -ST Single Temperature valves, install valve assembly in fixture using
B1/4” Flat Washer, 1/4” lock Washer and 1/4”-20 Hex Nuts provided. Flush
Page 10 of 31
VALVE ASSEMBLY
VALVE ASSEMBLY
Revised: 03/07/19

ACORN ENGINEERING FIELD SERVICE
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INSTALLATION, OPERATIONS & MAINTENANCE MANUAL
®
MERIDIAN 3792
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VALVE INSTALLATION & ADJUSTMENT
!IMPORTANT
Flush supply lines of all foreign material such
as pipe dope, pipe chips, solder, sand etc.
before making up supply connections.
Part #: 9927-142-001 Page 11 of 31
NOTE: Installation should be in accordance with
accepted plumbing practices.
3) Connect outlet of tempering valve to
spout(s) using 1/4” O.D. tube connections
provided.
1) Locate suitable place for mounting the valve
assembly. Valve assembly should be
accessible for service and adjustment and
as close to the point-of-use as possible.
Wall anchors and anchoring hardware, for
Ø3/8” mounting holes, provided by installer.
4) Turn on hot and cold water supplies. If any
leaks are observed, hand tighten
connections as necessary to stop leaks
before proceeding.
5) Turn on fixture and allow water to flow for 2
minutes. Measure water temperature at
outlet. If water is not at desired temperature,
adjust as necessary.
2) Connect hot and cold water to supply
valve using 1/2” NPTE connections.
2) Turn on fixture and run water for at least 2
minutes. Allow supply temperature to
stabilize.
3) Turn temperature stem counter-clockwise
for hotter or clockwise for colder outlet
temperature.
4) Tighten locknut to prevent accidental or
unauthorized temperature adjustment.
5) Re-check outlet temperature.
1) Loosen locknut.
Temperature Adjustment:
Valve Assembly Installation:
HINT: Angle stops are recommended
and is the responsibility of the installer.
LOCKNUT
WARMER
TEMPERATURE
STEM
Revised: 03/07/19

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INSTALLATION, OPERATIONS & MAINTENANCE MANUAL
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-SO Sensor Operation
Range Adjustment
2. Connect power supply to sensor. Red light should
be flashing.
1. Make sure power supply is disconnected from
sensor and make short circuit on red wires.
See DETAIL A.
4. Move hand to desired sensing distance.
See DETAIL B.
3. Move hand in front of sensor to distance of 2” to 4”
within 5 seconds and wait until red light flashes
quickly.
5. Hold hand at desired sensing distance until red light
stops flashing and solenoid activates.
See DETAIL C.
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
Part #: 9927-142-001 Page 12 of 31 Revised: 03/07/19
-SO SENSOR
-PPZ PUSHBUTTON
RED BLUE
RED
BLUE
TRANSFORMER
SOLENOID VALVE

ACORN ENGINEERING FIELD SERVICE
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INSTALLATION, OPERATIONS & MAINTENANCE MANUAL
®
MERIDIAN 3792
Please visit www.acorneng.com
for most current specifications.
To service or install batteries
remove access panel by
removing (4) 10-32 x 3/4"
screws from front of fixture
using allen head bit provided
(socket & driver by others).
Replace access panel when
finished.
-SO-BAT
Sensor Operation Battery Powered
SENSOR OPERATION & CONNECTIONS -BATTERY OP
Acorn does not provide batteries for -BAT units.
Each Pack requires (6) AA batteries.
Part #: 9927-142-001 Page 13 of 31 Revised: 03/07/19
-SO SENSOR
-PPZ PUSHBUTTON
RED BLUE
RED
BLUE
TRANSFORMER
SOLENOID VALVE

ACORN ENGINEERING FIELD SERVICE
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INSTALLATION, OPERATIONS & MAINTENANCE MANUAL
®
MERIDIAN 3792
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Ferrule Nut
1/4"
Min.
Ferrule
Nut
-H Hand Operated
1/8" O.D. AIR TUBE
1/4" O.D. WATER LINE
Leave a minimum 1/4” of polyethylene tubing
through the Ferrule Nut on the pushbutton
assembly. This is necessary to ensure proper
tubing connection.
Timing Screw
To adjust timing,
turn timing screw.
HAND OPERATION & CONNECTIONS
Turn timing screw clockwise to
increase timing.
Do not over tighten
ferrule nuts.
Part #: 9927-142-001 Page 14 of 31 Revised: 03/07/19

ACORN ENGINEERING FIELD SERVICE
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INSTALLATION, OPERATIONS & MAINTENANCE MANUAL
®
MERIDIAN 3792
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ACCESS PANEL INSTALLATION
Install front and side access panels using 10-32 x 3/4" center reject hex head screws provided.
Part #: 9927-142-001 Page 15 of 31 Revised: 03/07/19

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INSTALLATION, OPERATIONS & MAINTENANCE MANUAL
®
MERIDIAN 3792
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-DV SOAP OPTION RETRO-FIT & INSTALLATION
Part #: 9927-142-001
Remove Access Plug
Remove Corterra Plug
Install Soap Dispenser
Install Soap Filler
NOTE: Soap Tank Capacity = 1 Gallon
Do not exceed the capacity of the soap tank. Overfilling may result in spilling and pooling of soap
solution within the sprayhead enclosure and outside the soap tank.
Some soaps contain corrosive additives that can cause rust in soap dispensers.
Acorn Engineering Company recommends user/ maintenance personnel review
MSDS reports of soap and possible corrosive additives noted.
!WARNING
Remove top cover from
1unit. To remove cover, use
Allen head bit provided and
unscrew 10-32 x 3/4" long
vandal resistant fasteners
shown. Hex bit driver is
installer provided.
Remove Corterra plug from
2top cover and soap access
plug from bottom of
sprayhead enclosure.
Position and install soap
3tank in sprayhead
enclosure as shown and
install soap dispenser by
aligning dispenser with
drain adapter and fixing
with set screws as shown
Install soap filler assembly
4to top cover and replace.
Fill soap tank by removing
5filler cap and pouring soap
directly into tank. Do NOT
overfill.
Install Soap Tank
Sprayhead
Enclosure
Page 16 of 31 Revised: 03/07/19

ACORN ENGINEERING FIELD SERVICE
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INSTALLATION, OPERATIONS & MAINTENANCE MANUAL
®
MERIDIAN 3792
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Optional -KP Kick Plate Rough-Ins
Optional -KP Kick Plate Installation
Part #: 9927-142-001 Page 17 of 31
B
A
171
2"
TYP.
DIM
"A"
11"
DIM
"A"
DECK
HEIGHT
15" 34"
14-1/2" 33"
13-1/2" 31"
Sink Mounting Frame, Shown For Reference.
Ø1/4" x 3/8" Long Slots For Installer Provided
Wall Anchors And Anchoring Hardware.
A
B
Revised: 03/07/19

ACORN ENGINEERING FIELD SERVICE
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Programable Piezo Pushbutton
Programming Instructions (Flow Time Adjustment)
— 1 second timing mode: Each push of the button adds 1 second to the total timing cycle.
Prevision must be made to access the back of the piezo pushbutton. There is an LED on the back of the piezo
pushbutton under a layer of transparent epoxy, used as a programming indicator light.
In order to start the programming the piezo pushbutton, the button must be powered down. Disconnect the red power
cable and wait 20 seconds, then reconnect the red power cable.
— 20 second timing mode: Each push of the button adds 20 seconds to the total timing cycle.
— 5 second timing mode: Each push of the button adds 5 seconds to the total timing cycle.
To program the piezo pushbutton, you will need to be able to see the back of the piezo pushbutton.
As soon as the cable is reconnected the LED will start flashing, it will flash 4 times, then stays on for 3 seconds.
During the 3 second period, push the piezo button once, the LED will go out, now you are in the 1 sec timing mode
and each time the button is pushed the LED will flash, adding 1 sec to the total timing cycle.
To move on to the 5 sec timing mode, pause and wait for the LED to flash 2 times, now you are in the 5 sec timing
mode. Each time the button is pushed the LED will flash, adding 5 sec to the total timing cycle.
— Each timing mode (1 sec, 5 sec or 20 sec timing mode) can be sequenced up to 100 times, that is
the number of times, the button can be pushed, to increase the total timing cycle in each timing mode.
— When a timing mode is not required then do not push the button and wait for the next timing mode.
THE TIME SETTINGS PROGRAM USES 3 DIFFERENT TIMING MODES:
To move on to the 20 sec timing mode, pause and wait for the LED to flash 3 times, now you are in the 20 sec timing
mode and each time the button is pushed the LED will flash, adding 20 sec to the total timing cycle. After programing
is complete, pause and wait for the LED to flash 4 times and then 5 times, which completes the programming.
NOTE: This programming procedure moves along rapidly, there is
only about 2 or 3 seconds between programming operations.
The Button is factory set an 8 sec. timing cycle, if an 8 sec. cycle is adequate, then no programming adjustment
is required.
NOTE: Read the entire document before
trying to program the piezo pushbutton.
Page 18 of 31
Part #: 9927-142-001
®
MERIDIAN 3792
Revised: 03/07/19

ACORN ENGINEERING FIELD SERVICE
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Determine the
number of seconds
per timing cycle
1 Push = 1 Second
x 1 = sec
Fill in all the
Boxes below
1 Push = 5 Seconds
x 5 = sec
ADD
1 Push = 20 Seconds
x 20 = sec
ADD
Total timing cycle equals
seconds
EQUALS
Ÿ While the LED is steady on, push button.
PROGRAMING STEPS:
Ÿ LED turns off.
Ÿ You are in the 1 sec timing mode, immediately push the button, 1 push
equals 1 sec added to the total timing cycle.
Ÿ You are in the 5 sec timing mode, immediately push the button, 1 push
equals 5 sec added to the total timing cycle.
Ÿ You are in the 20 sec timing mode, immediately push the button, 1
push equals 20 sec added to the total timing cycle.
Ÿ Pause and wait for the LED to flash 2 times.
— Power down piezo button for 10 seconds.
Ÿ LED flashes, then stay on.
Ÿ Pause and wait for the LED to flash 3 times.
Ÿ Reconnect power.
Programming Instructions (Flow Time Adjustment)
Programmable Piezo Pushbutton
WORKSHEET
(FILL IN ALL BOXES, WHICH WILL SIMPLIFY THE PROGRAMMING PROCEDURE)
Page 19 of 31
Part #: 9927-142-001
®
MERIDIAN 3792
Revised: 03/07/19

ACORN ENGINEERING FIELD SERVICE
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INSTALLATION, OPERATIONS & MAINTENANCE MANUAL
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BLACK RED
BLACK SOLENOID
CABLE
RED POWER
CABLE
PROGRAMMING INDICATOR
LED LIGHT
TRANSPARENT
EPOXY FILLING
PIEZO
PUSHBUTTON
Page 20 of 31
Part #: 9927-142-001
®
MERIDIAN 3792
Revised: 03/07/19