Esma Automatic Ultrasonic E789-OMS User manual

Celebrating over 30 years of excellence in manufacturing ultrasonic cleaning
equipment, electropolishing equipment and associated chemistries
ESMA, Inc.
P. O. BOX 734 * SOUTH HOLLAND, IL 60473 * (800)-276-2466 * AX [phone]
1

Celebrating over 30 years of excellence in manufacturing ultrasonic cleaning
equipment, electropolishing equipment and associated chemistries
ESMA, Inc.
P. O. BOX 734 * SOUTH HOLLAND, IL 60473 * (800)-276-2466 * AX [phone]
2

Celebrating over 30 years of excellence in manufacturing ultrasonic cleaning
equipment, electropolishing equipment and associated chemistries
ESMA, Inc.
P. O. BOX 734 * SOUTH HOLLAND, IL 60473 * (800)-276-2466 * AX [phone]
3
Instructions for Ultrasonic Washer
E789-OMS
1. INTRODU TION
The E789-OMS Automatic Ultrasonic Washer automatically performs a cleaning cycle, the major steps of which are:
•Ultrasonic cleaning
•Ultrasonic rinsing (hot tap water)
•Hot air drying
The E789-OMS unit has a primary rinse solenoid, which is connected to the hot tap water supply. The E789-OMS is
equipped with a chemical metering pump for precision distribution of the exact amount of liquid detergent concentrate.
Use only Esma brand detergent concentrates when operating the E789-OMS with metering pump. The result is a
finished product ready for the next step (sterilizing, packaging, assembly, storage). The three consists of four sections: 1)
Tank Module-to be installed in the counter 2) ontrol Module-to be installed in front of counter 3) Power Module to be
installed under the counter. A Metering Pump is mounted on the tank module and is used to automatically feed
detergent concentrate during the fill cycle.

Celebrating over 30 years of excellence in manufacturing ultrasonic cleaning
equipment, electropolishing equipment and associated chemistries
ESMA, Inc.
P. O. BOX 734 * SOUTH HOLLAND, IL 60473 * (800)-276-2466 * AX [phone]
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The Tank Module is manufactured from 316 stainless steel with 12 potting transducers mounted on the bottom. The
tank is equipped with two fill solenoids, and a drain solenoid. The tank is fitted with a 304 stainless hinged cover housing
the fan and heater for air-drying.
The ontrol Module is manufactured from 304 stainless and contains the switches to start the ILL, CLEAN or ULL
CYCLE cycles and stop the process manually, if needed.
The Power Module contains the self-tuning modular circuit boards, programmable controller, high velocity fan to cool the
electronics and R I filter to eliminate high frequency noise.
The Metering Pump is a Gorman-Rupp bellows metering pump. The supplied inlet tube from the
metering pump should be inserted into a gallon jug of Esma cleaning solution concentrate. The pump
is configured to “meter” a 1% concentrate during the fill cycle, approximately 180ml. Please use only
proper detergent which is formulated for use with the E789-OMS model.
PLEASE READ THESE INSTRUCTIONS THOROUGHLY BE ORE INSTALLATION AND OPERATION. CALL
800-276-2466 I YOU HAVE ANY QUESTIONS

Celebrating over 30 years of excellence in manufacturing ultrasonic cleaning
equipment, electropolishing equipment and associated chemistries
ESMA, Inc.
P. O. BOX 734 * SOUTH HOLLAND, IL 60473 * (800)-276-2466 * AX [phone]
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2. INSTALLATION
If the control module is to be placed directly in front of tank, allow 5 inches between counter opening and front of cabinet
(diagram 1). Also, 28 inches of clearance is necessary under the counter for drains.
ontrol Module - Cut opening of 4 ¼” x 10 ¼” in front of cabinet. The overall flange of unit on front of cabinet is 5” x 12”,
so center unit accordingly. Module will be mounted later with 4, No. 8 wood screws.
Tank abinet - Cut opening of 16” wide X 15” depth in top of counter. The overall flange of unit on top of counter is 18
¾” wide X 18” deep, so center the unit accordingly. Secure unit to counter with 8, #10 stainless wood screws supplied.
Tank Module should be set in counter first. Place the tank-mounting screws into pre-drilled holes in counter and tighten
down with #8 flat head screws, which are supplied. (DO NOT OVERTIGHTEN).
Power Module measures 8’ x 16” x 18”D. However, 1” of clearance is necessary both at the front and back of unit for
proper ventilation. The electrical connections, from tank and control modules, attached to the top of the module, require
additional 2 to 3 inches of space.
The Metering Pump should be monitored to assure that there is solution in the jug. Due to the length of tubing, it will
take one cycle for the metering pump to become “primed”. Once the pump is primed, a 1% solution concentrate will
automatically be added to the water during the fill cycle. Please regularly check to make sure that there is adequate
cleaning solution in the jug.
3. PLUMBING HOOK-UP
A. Water Input
The primary solenoid should be connected to a hot water source.

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equipment, electropolishing equipment and associated chemistries
ESMA, Inc.
P. O. BOX 734 * SOUTH HOLLAND, IL 60473 * (800)-276-2466 * AX [phone]
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This solenoid has a ½” NPT female opening. A ½”MNPT x 3/4”MGH adapter has been supplied for hot water hookup
using a standard washing machine water supply hose (not supplied). It is recommended that a filter washer be
installed into the water supply hose to prevent sediment debris from entering solenoid from water source. The high-
pressure hose should connect the solenoid to a shut-off valve (not supplied) at your water source.
Also, a backflow regulator (not supplied) may have to be attached at your water source to comply with local
regulations.
B. Water Output
A 1” male NPT x 3/4” female NPT x 1½” male NPT PVC adapter is supplied to connect the overflow port (1” female
NPT coupling located at the bottom back of unit) to the drain solenoid. When this adapter is installed – connect a
vented drain (P-trap) to 1 ½” male NPT on adapter.

Celebrating over 30 years of excellence in manufacturing ultrasonic cleaning
equipment, electropolishing equipment and associated chemistries
ESMA, Inc.
P. O. BOX 734 * SOUTH HOLLAND, IL 60473 * (800)-276-2466 * AX [phone]
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4. ELE TRI AL
The unit is rated at 1500 W, 120 VAC, 50/60 HZ. Only the power module is plugged into your 120VAC supply (diagram).
The Tank Module has two plugs. Both plugs are attached to power module at receptacles C & E.
ontrol Module plug (M) plugs into power module receptacle (G).
Only the plug from power module (A) is to be connected to your power source. Unit must be electrically grounded. The
power cord must be connected to a three-way grounded outlet. or 2-wire service, an adapter with external ground wire is
necessary. Connect the green grounding wire of the adapter to the screw, which holds the electric outlet plate cover to the
socket. DO NOT OPERATE UNIT WITHOUT PROPER GROUNDING. A fuse, 15AMP, 120VAC, is located on the power
module.
5. ONTROL FUN TION
A. Main Switch: (Located on Power Module) When unit is ready for operation, put the main switch to ON and the
indicator light on the Power Module and the Control Module will be ON.
B. Run-Reset Switch: Located on Control Module, must be in the RUN position for the programmable controller to
operate. If during the program cycle you want to stop the process, turn switch to RESET position and the program
cycle will discontinue. Move switch back to RUN position and program will START over at the beginning of the fill
cycle when start button is pushed.
Use run-reset switch only for emergency stopping of unit.
. Fill/ lean/Full ycle Switch:
Fill and Hold ycle: Must start at ILL position and push start button. After tank is filled the cycle will stop
and allow instruments to soak prior to continuing the clean/rinse/dry steps. Move switch to CLEAN position. When
instruments or parts have been added, push START button and the clean/rinse/dry cycle will begin. You cannot

Celebrating over 30 years of excellence in manufacturing ultrasonic cleaning
equipment, electropolishing equipment and associated chemistries
ESMA, Inc.
P. O. BOX 734 * SOUTH HOLLAND, IL 60473 * (800)-276-2466 * AX [phone]
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start the clean cycle if the fill cycle is not completed. This is a safety precaution so the ultrasonics will not operate
without any liquid in the tank.
Full ycle: When this cycle is selected the unit will run a complete cycle of fill/clean/rinse/dry by pressing
the START button.
6. PRELIMINARY START-UP
After plumbing is completed, conduct the following test to determine if there are any leaks in the system.
A. Turn main power ON
B. RUN-RESET switch to ON
C. ILL/CLEAN/ ULL CYCLE switch to ILL
D. Close cover
Push START button and gradually open the inlet valve you installed in the rinse line to bleed the air out of the line; them
immediately open valve completely. It is important that the inlet valve doesn’t restrict the flow to less than 3.5GPM or the
fill time will have to be increased. After 90 seconds, the fill solenoid will close, and the water will be up to the overflow
drain opening. It is possible that during the first cycle the inlet valve was not manually opened fast enough to allow
3.5GPM for the entire 90 seconds. To test the overflow-rinse line, leave ILL/CLEAN/ ULL CYCLE switch on ILL and
push the start button and water will flow into tank for additional 90 seconds. Now you can check your plumbing for leaks.
AUTION: When conducting this leak test, make sure the power module is not under the plumbing in order to avoid
getting the electronics wet.
To test the drain plumbing, move ILL/CLEAN/ ULL CYCLE switch to CLEAN and push START button to start the
ultrasonic cleaning cycles (make sure fan inlet and outlet of power module are not obstructed). The clean cycle will
cavitate for 10 minutes before the tank will drain. The entire clean cycle and times are given in the procedure section.
You can stop the clean cycle at any time by turning the RUN-RESET switch to RESET and the program will revert back to
the beginning of the ILL CYCLE.

Celebrating over 30 years of excellence in manufacturing ultrasonic cleaning
equipment, electropolishing equipment and associated chemistries
ESMA, Inc.
P. O. BOX 734 * SOUTH HOLLAND, IL 60473 * (800)-276-2466 * AX [phone]
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7. OPERATION
The basic principle of operation is the enhancement and acceleration of
the cleaning action through ultrasonic cavitations. Instruments, or parts
to be cleaned, are placed in the basket (or cassette racks) and lowered
into the tank.
NEVER PLACE PARTS DIRECTLY ON THE BOTTOM O THE TANK. The
baskets and cassette racks have rubber supports to keep parts off
bottom of tank.
8. PRO EDURE
1. Turn main power ON
2. Turn RUN-RESET switch to RUN. (Should remain in RUN position at all times.
3. Set ILL/CLEAN/ ULL CYCLE switch to ILL.
4. Verify that the metering pump inlet supply is inserted into a gallon jug of an approved Esma cleaning concentrate
(see section on cleaning agents).
5. Lower basket with instruments, or parts, on support rack.
6. Close cover.
7. Push START button and water will enter the tank for 90 seconds.
8. At this point more instruments (or parts) could be added when available, or move ILL/CLEAN/ ULL CYCLE
switch to CLEAN, push START button and the cleaning program will automatically proceed through the cycle as
follows:

Celebrating over 30 years of excellence in manufacturing ultrasonic cleaning
equipment, electropolishing equipment and associated chemistries
ESMA, Inc.
P. O. BOX 734 * SOUTH HOLLAND, IL 60473 * (800)-276-2466 * AX [phone]
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E789-OMS UNIT
Function Time/Seconds
1. Ultrasonic cleaning 600
2. Drain 150
3. ill 90
4. Ultrasonic 60
5. Ultrasonic/Rinse 60
6. Ultrasonic 60
7. Ultrasonic/Rinse 60
8. Ultrasonic 60
9. Drain, Dryer, an 150
10. Drain, Dryer, an 480
11. Drain, an 60
12. Buzzer 5
TOTAL 1835 seconds
(30 ½ minutes)
9. WATER ONSUMPTION
In the program, 5 gallons of water are used on the initial fill cycle with an additional 5 gallons used in the fill-rinse steps,
C to H, for a total of 10 gallons of hot water used per cycle.
If any changes in the rinse programs are required, consult the manufacturer.

Celebrating over 30 years of excellence in manufacturing ultrasonic cleaning
equipment, electropolishing equipment and associated chemistries
ESMA, Inc.
P. O. BOX 734 * SOUTH HOLLAND, IL 60473 * (800)-276-2466 * AX [phone]
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10. DRYING
Incoming air is heated in the tank cover to 160° and forced by the fan through the tank chamber before exhausting
through the tank cover. CAUTION: Do not touch the cover during the drying cycle because some areas will be hot. Also,
NEVER place any towel or obstruction over the fan intake on cover. After 7 minutes of hot air drying, the parts are left in
the tank for 2 minutes to allow some cooling to take place before handling. The air temperature during the hot air drying
can be increased or decreased by adjusting a thermo-switch located in dryer cover at hot air exit. Please contact
manufacturer for more details.
11. PRESOAKING OF INSTRUMENTS
or maximum effective cleaning, it is best if blood and other substances do not dry on the instruments. Therefore, fill the
tank with hot water and cleaning agent and use the tank as a holding vessel for instruments until enough have
accumulated to warrant cleaning.
12. LEANING AGENT
Use only Esma brand detergent concentrates when operating the E789-OMS with metering pump. Esma produces
3 powerful liquid cleaning agents:
•Esma-Shine E105
•Esma-General Purpose E589
•Esma-Zyme E1240.
DO NOT use powdered detergents; some powders take too long to go into solution. The metering pump is engineered to pump only
the correct amount of detergent concentrate into the tank during the fill cycle. Esma brand detergents are formulated to meet the
pump ratios. The metering pump has been factory calibrated to meter in 180ml of detergent concentrate during the fill cycle. By
not using the correct cleaning agent problem can arise with final rinsing of parts if too much suds are generated.

Celebrating over 30 years of excellence in manufacturing ultrasonic cleaning
equipment, electropolishing equipment and associated chemistries
ESMA, Inc.
P. O. BOX 734 * SOUTH HOLLAND, IL 60473 * (800)-276-2466 * AX [phone]
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13. MAINTENAN E
Periodically, the drain screen in tank will have to be removed and cleaned. The accumulated lint and debris could slow
down the draining enough so tank will not be emptied of cleaning solution when rinse cycle begins.
Once a month, open power module and vacuum any dust that might have been drawn in by the fan. Never operate unit
with cover of power module off.
The tank is manufactured of 316SS and the modules of 304SS. Clean with a commercially available cleaner for stainless
steel kitchen appliances.
OR ASSISTANCE CALL 800-276-2466 or 708-331-1855
14. TROUBLE SHOOTING
•If there seems to be erratic behavior with a component, or if the fill and/or clean cycle seem to have changed,
always go through the following procedure:
oTurn RUN-RESET switch momentarily to RESET and then back to RUN. The program will now clear and
revert to the beginning calling for a ILL CYCLE. Move ILL-CLEAN switch to ILL and push START
regardless of if the tank has water in it.
oIf the problem persists, continue with trouble shooting or call
manufacturer.
The POWER and RUN lights are ON.
The PLC has 8 outputs. These outputs are as follows:
00 ---- Primary ill Solenoid Valve
01 ---- Ultrasonics
02 ---- Drain Solenoid Valve
03 ---- Dryer Heating Element
05 ---- Buzzer
06 ---- Dryer/Cooling an

Celebrating over 30 years of excellence in manufacturing ultrasonic cleaning
equipment, electropolishing equipment and associated chemistries
ESMA, Inc.
P. O. BOX 734 * SOUTH HOLLAND, IL 60473 * (800)-276-2466 * AX [phone]
13

Celebrating over 30 years of excellence in manufacturing ultrasonic cleaning
equipment, electropolishing equipment and associated chemistries
ESMA, Inc.
P. O. BOX 734 * SOUTH HOLLAND, IL 60473 * (800)-276-2466 * AX [phone]
14
PROBLEM AUSE REMEDY
Rinse solenoid is noisy, pulsating and little or no
water coming into tank when output 00 is ON
Particles or other accumulation has
entered bleed line of solenoid
Low water pressure
Solenoid needs to be cleaned out (see instruction sheet for fill
solenoid) Make sure filter screen is in place prior to valve
5-10 PSI water pressure is required to operate solenoid
No ultrasonics when output 01 is ON. Large cooling
fan in power module is ON.
use blown on circuit boards. Need repair—check that cooling fan is operating during
cleaning.
No ultrasonics when large cooling fan is O when
output 01 is on
Low water level in tank has activated low
level safety control
Rise solenoid problem, or insufficient
water supply.
In line fuse to PLC is blown.
Relay for fan and circuit boards not
working.
As above (fill solenoid problem)
Replace 1.5Amp/120V fuse
Replace relay
Dryer gets too hot an inlet on top off cover is blocked
Thermostat inside cover needs adjustment
Dryer an not working with output 06 on
Remove obstacle
Contact manufacturer
Replace in-line fuse to PLC
Dryer is cool with output 03 ON Thermostat needs adjustment if there is
some heat.
Relay in control module is faulty
Contact manufacturer
Replace relay
Tank drains with output 02 O Debris lodged in drain solenoid Clean out solenoid (see instructions) and make sure drain
screen in place in tank
Tank does not drain with output 02 0N Drain screen clogged.
Y strainer clogged
Solenoid not operating
Clean and replace screen.
Clean out Y strainer
In-line fuse to PLC is blown or clean out solenoid valve