Acorn Meridian 3792 User manual

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MERIDIAN MODEL# 3792
CORTERRA ADA-COMPLIANT
WASHFOUNTAIN
Acorn Engineering Company
15125 Proctor Avenue •P.O. Box 3527
City of Industry •CA •USA •91744-0527
Phone: [phone] Fax: [phone]
Faxback: 888.226.7624 Web Site: www.acorneng.com
Field Service 800.743.8259
L1000802 Rev. H – 03/07/05
REQUIRED ITEMS FOR INSTALLATION – NOT SUPPLIED
•7/16” Hex Wrench
•Plumbers Putty
•Teflon Tape
•Slotted Screwdriver (for Metering Adjustment)
•Socket and Driver for Center Reject Bit
•3/8” Fixture Anchoring Hardware (and Appropriate Tools)
TRUE SIZE
0152-006-000
10-32 UNF x 3/4” Center
Reject Hex Socket Flat
Head Screw – Qty. 12
TRUE SIZE
TRUE SIZE
0337-050-000
1/4” Lock Washer – Qty. 12
(For –ST option – Qty. 16)
0331-005-000
1/4” Flat Washer – Qty. 8
(For –ST option – Qty. 12)
0206-002-000
1/4”-20 UNC x 1” Hex
Head Cap Screw – Qty. 4
TRUE SIZE
TRUE SIZE
0206-004-000
1/4”-20 UNC x 1/2” Hex
Head Cap Screw – Qty. 4
TRUE SIZE
0302-005-000
1/4”-20 Hex Nut– Qty. 8
(For –ST option – Qty. 12)
TRUE SIZE
TRUE SIZE
0331-031-000
1/4” Fender Washer
Qty. 4
0296-025-199
Allen Head Bit With
Center Reject – Qty. 1

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L1000802 Rev. H – 03/07/05
Rough-In Dimensions For Standard 34” Rim
For –SO Sensor
Operation: Supply
120V/60Hz 3 Amps
(Max.) Electric
Receptacle.
Finished Floo
r
1/2” NPS Valve Supplies
1-1/2” O.D. Waste Outlet.
3/8” UNC Anchoring Points –
10 Places. Hardware by Others.
Some available options may affect installation procedures.
Please review the entire manual before proceeding. Corterra
and stainless steel should be protected throughout installation to prevent damage to surface
finish. Refer to the Care and Cleaning section of this manual.
For lower rim heights, decrease vertical dimensions
by subtracting the difference between standard 34”
rim height and lower rim height from all dimensions.
(i.e. For 30” rim height, decrease waste outlet height from
25” to 21”, etc.)
Frame “V” Notch

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L1000802 Rev. H – 03/07/05
1. Disassemble access panels and deck assembly
from frame. Anchor frame to wall using 3/8”
mounting hardware by others.
2. -See DETAIL A. Place deck assembly on frame,
making 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
p
rovided.
DETAIL
B
DETAIL A
DETAIL C
Deck Support
Flanges
Frame Joggle
Angle

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L1000802 Rev. H – 03/07/05
3. Install grid strainers with
plumbers putty. Assemble
waste piping using Teflon
tape and make-up connection.
4B. For –ST Single
Temperature valves, attach valve
assembly to mounting channel and then install in
fixture using 1/4” lock washers, 1/4” flat washers, and 1/4”-20 hex
nuts provided. Flush supply lines. Connect valve.
Before making up the
supply connections, the
supply lines must be flushed
of all foreign material such
as pipe dope, pipe chips,
solder, sand, etc.
VALVE RESTRICTIONS:
Maximum Pressure 100 PSI.
Max. Temperature 130°F.
Valve Outlet Temp. 105°F Max.
Mounting Channel
Valve Assembly
4A. For standard and –MXT valves, install valve
using 1/4” lock washers, 1/4” flat washers and 1/4”-20
hex nuts provided. Flush supply lines. Connect valve.

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L1000802 Rev. H – 03/07/05
-H Hand Operation
Timing Screw.
Turn timing screw
to adjust metering.
Turn timing screw clockwise
to increase timing.
Ferrule Nut
Do not overtighten ferrule
nuts.
Valve Shown Upright For Reference Only
¼” Min.
Ferrule Nut
Leave a minimum
1/4” of polyethylene
tubing through the Ferrule Nut on the pushbutton
assembly. This is necessary to ensure proper
tubing connection.

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L1000802 Rev. H – 03/07/05
-SO Sensor Operation - Standard
-SO Sensor Operation Range Adjustment
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.
3. Move hand in front of sensor to distance
of 2” to 4” within 5 seconds.
4. Wait until red light flashes quickly and
move hand to desired sensing distance.
See DETAIL B.
5. Hold hand at desired sensing distance
until red light stops flashing. 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.
Valve Shown Upright For Reference Only
Jumper
By Others

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L1000802 Rev. H – 03/07/05
-SO-BAT Sensor Operation – Battery Powered
To service or install batteries
remove access panel by removing
10-32 x 3/4” screws from front of
fixture using allen head bit
provided (socket & driver
by others). Replace panel
when finished.
Acorn does not provide batteries for –BAT units.
Each station requires (6) AA batteries.
Valve Shown Upright For Reference Only

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L1000802 Rev. H – 03/07/05
-DV Soap Option
5. Install front and side access panels using 10-32 x 3/4” screws provided.
Soap Filler
DETAIL D
DETAIL
D

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L1000802 Rev. H – 03/07/05
TROUBLE SHOOTING FOR HAND PUSHBUTTON OPERATED VALVES
Normal Valve Function: Hand pushbutton operated valve has an adjustable flow time of 5 to 60 seconds.
CONDITION: WATER DOES NOT FLOW
Probable Cause:Solution:
Water Main Closed. Open Water Main.
Checkstops Closed. Open Checkstops.
Debris or Scale in Checkstop Strainer. Remove Checkstop Strainer and Clean.
Air Leaks from 1/8” O.D. Tubing or Fittings. Replace Damaged Tubing or Fitting.
Pushbutton Air Diaphragm Leaks. Replace Pushbutton Air Diaphragm.
Servomotor Diaphragm Center Hole is Blocked. Remove Blockage.
Servomotor Upper Diaphragm is Damaged. Replace Servomotor Upper Diaphragm.
Low or No Water Pressure at Supplies. Increase Water Pressure to 30 PSI Minimum.
CONDITION: WATER DRIPS, WON’T SHUT OFF
Probable Cause:Solution:
Servomotor Diaphragm Offset Hole is Blocked. Remove Blockage.
Servomotor Seat is Damaged. Replace Servomotor Seat.
Servomotor Plate or Diaphragm is Obstructed. Remove Cause of Obstruction.
Servomotor Timer Assembly is Damaged. Replace Servomotor Timer Assembly.
CONDITION: REDUCED WATER FLOW
Probable Cause: Solution:
Valve Riser Tubing is Crimped. Straighten Valve Riser Tubing.
Debris or Scale in Checkstop Strainer. Remove Checkstop Strainer and Clean.
Blockage in Valve Flow Control. Remove Blockage.
Low Water Pressure at Supplies. Increase Water Pressure to 30 PSI Minimum.
Lime Deposits in Hot Water Pipes. Remove Lime Deposits with Appropriate Cleaning Solution.
CONDITION: PREMATURE WATER SHUT OFF.
Probable Cause:Solution:
Air Leaks from 1/8” O.D. Tubing or Fittings. Replace Damaged Tubing or Fitting.
Pushbutton Air Diaphragm Leaks. Replace Pushbutton Air Diaphragm.
MINIMUM / MAXIMUM WATER PRESSURE (PSI) 30 / 100. MAXIMUM WATER TEMPERATURE 130°F.

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L1000802 Rev. H – 03/07/05
TROUBLE SHOOTING FOR 9 VOLT DC SENSOR OPERATED VALVES
Normal Valve Function: 9 Volt DC sensor operated valve has flow time of 90 seconds maximum. To reactivate,
the user must move out of and return to the sensing area.
CONDITION: WATER DOES NOT FLOW
Indicators:Probable Cause:Solution:
Sensor Flashes Continuously
Every 2 Seconds When Hands
are Within Range.
Low Battery Warning. Replace Battery.
Circuit Breaker Tripped. Reset Circuit Breaker.
Battery Completely Used Up. Replace Battery.
Defective 9VDC Transformer. Replace Transformer.
Transformer Polarity Crossed. Replace Transformer (Sensor may be
Damaged and Need Replacement).
Unit is in “Security Mode” After 90
Seconds of Constant Detection.
Remove Sources of Detection and Wait
30 Seconds Before Checking.
Range is too short. Increase Range.
Range is too long. Decrease Range and Wait 30 Seconds.
Sensor is Picking Up a Highly
Reflective Surface.
Eliminate Cause of Reflection and Wait
30 Seconds Before Checking.
Sensor Does Not Flash When the
User’s Hands are Within Range.
Defective Sensor. Replace Sensor.
Stops or Water Main Closed. Open Stops or Water Main.
Bad Sensor to Solenoid Connection. Ensure Wires make Proper Contact.
Debris or Scale in Solenoid
Assembly.
Remove Solenoid, Pull Out Plunger and
Spring, and Clean with Scale Remover
Solution or Pressurized Air.
Debris or Scale in Diaphragm. Remove Diaphragm and Clean
Sensor Flashes Once When
User’s Hands are Within Range.
Debris or Scale in Strainer. Remove Strainer and Clean.
CONDITION: FALSE TRIGGERING;
WATER FLOWS CONTINUOUSLY
Indicators:Probable Cause:Solution:
Debris or Scale in Diaphragm. Remove Diaphragm and Clean.Sensor Flashes when User’s
Hands are Within Range. Diaphragm is Defective or Torn. Replace Diaphragm.
Sensor is Dirty or Covered. Clean or Uncover Sensor and Wait 30
Seconds.
Decrease Range and Wait 30 Seconds.
Sensor Does Not Flash when
User’s Hands are Within Range. Range too long or Highly Reflective
Surface, Sunlight, Bright Lights etc.
are Triggering Sensor.
Eliminate Cause of Reflection or Correct
Lighting Problem.
CONDITION: WATER FLOWS
CONTINUOUSLY BUT STOPS
WHEN HANDS ARE WITHIN RANGE
Indicators:Probable Cause:Solution:
Water Runs Continuously When
Sensor Not Activated. Sensor
Flashes When Hands are Within
Range and Water Shuts Off.
Solenoid Polarity Crossed. Disconnect Solenoid and Reverse
Polarity.
MINIMUM / MAXIMUM WATER PRESSURE (PSI) 30 / 100. MAXIMUM WATER TEMPERATURE 130°F.