LVO Manufacturing RW2580 User manual

LVO Manufacturing, Inc.
RW2580 Pan-Washer
Owner’s Manual

LVO Manufacturing, Inc.
LVO Manufacturing, Inc.LVO Manufacturing, Inc.
LVO Manufacturing, Inc.
808 N. 2
nd
Avenue E., P.O. Box 188
ock apids, IA 51246
www.lvomfg.com
[phone]
1-800-346-5749 Fax [phone]
2
Warranty
LVO Manufacturing Inc. warrants equipment manufactured by it to be free from defects in
material and workmanship for a period of one ( ) year from date of delivery except as noted below.
LVO will not be held responsible for damage or unsatisfactory performance due to negligence,
accident, alteration, unauthorized repair, improper installation or startup (see owner’s manual),
improper application, or improper maintenance (see owner’s manual).
Parts found, on factory inspection, to be defective in workmanship or materials during the
warranty period will be replaced (parts and labor, not overtime), provided the Buyer returns the
defective parts to LVO Manufacturing Inc. within 30 days, transportation prepaid. LVO
Manufacturing Inc. will pay UPS 2nd Day Air shipping charges for parts (with the exception of
excessively large or heavy items) covered on warranty if the machine is not operational.
LVO Manufacturing Inc. reserves the right to make changes in design and construction of its
products without imposing any obligation upon itself toward products previously manufactured.
This warranty is in lieu of any other warranties, expressed or implied, made on the part of
LVO Manufacturing Inc. who does not accept responsibility to any purchaser of its products for any
representation or warranty made by dealers or salespersons beyond those herein expressed including
any implied warranties of merchantability or fitness for a particular purpose.
Warranty Procedure
) Locate and record the 2 digit serial number located on the control box side of the rack washer.
2) Gather as much information about the problem as possible.
3) Call LVO Manufacturing Inc. at 1-800-346-5749 and request
technical service. Prior to performing any warranty work, you must
call the factory for a warranty authorization number (WA- ). This
warranty authorization number must be on every invoice we receive for
services rendered on the machine. Without this authorization number
the invoice will not be paid. The warranty number must also be
included with the defective part returned.

LVO Manufacturing, Inc.
LVO Manufacturing, Inc.LVO Manufacturing, Inc.
LVO Manufacturing, Inc.
808 N. 2
nd
Avenue E., P.O. Box 188
ock apids, IA 51246
www.lvomfg.com
[phone]
1-800-346-5749 Fax [phone]
3
Table of Contents
Warranty ................................................................................................................................................... 2
Table of Contents ..................................................................................................................................... 3
RW2580 Specifications ............................................................................................................................ 4
Electrical Data .......................................................................................................................................... 5
Warnings & Cautions ............................................................................................................................... 6
Introduction .............................................................................................................................................. 8
Installation Instructions ............................................................................................................................ 9
Startup Procedures ................................................................................................................................. 3
Sequence of Operation ........................................................................................................................... 5
Operation of Machine ............................................................................................................................ 6
Preventative Maintenance ...................................................................................................................... 9
Trouble Shooting – Electric Machines ................................................................................................... 20
Trouble Shooting – Gas Machines ......................................................................................................... 2
Trouble Shooting – Steam Machines ..................................................................................................... 2
Trouble Shooting Flowchart .................................................................................................................. 22
Parts List ................................................................................................................................................ 24
Drawings:
(Drawing scales are approximate)
General View ......................................................................................................................................... 28
Four View – Electric .............................................................................................................................. 29
Four View – Gas .................................................................................................................................... 30
Concrete Pit Specifications .................................................................................................................... 3
Pit Clearance Specifications ................................................................................................................... 32
Stainless Steel Pit Liner ......................................................................................................................... 33
Bun Pan Rack ......................................................................................................................................... 34
Cake Pan Rack ....................................................................................................................................... 35
Bowl Rack .............................................................................................................................................. 36
Ladder Diagram – Electric ..................................................................................................................... 37
Ladder Diagram – Gas ........................................................................................................................... 38

LVO Manufacturing, Inc.
LVO Manufacturing, Inc.LVO Manufacturing, Inc.
LVO Manufacturing, Inc.
808 N. 2
nd
Avenue E., P.O. Box 188
ock apids, IA 51246
www.lvomfg.com
[phone]
1-800-346-5749 Fax [phone]
4
RW2580 Specifications
Overall Dimensions
Width – 57 ¼” Depth – 0 ¼”
Height – 97” Height above floor – 8 ¼” (Pit Models)
Wash Area – 3 ” x 76” x 69 ½” Height above floor – 97 ½” (Floor Models)
Hot Water System
¼” hot water supply required, union provided
40°F water required at the machine
260 GPH at 20 PSI (26 gal/cycle x 0 cycle/hr)
Rinse booster: (3) 9 kW heating element in a 30 gallon rinse tank OR
” steam coil in a 30 gallon rinse tank (Steam Only)
Full Load Amps
208 Volt 230 Volt 460 Volt
Electric 2 6.0 94.6 98.
Gas 43.8 29. 64.4
Steam 66.0 59.0 30.3
Gas System (Gas Machines Only)
¾” gas supply (Supply pressure .5” psi max)
Natural: 7” W.C. minimum inlet, 4 ¼” W.C. main manifold – 95,000 BTU
LP: ” W.C. minimum inlet, 5” W.C. main manifold – 85,000 BTU
4” stainless steel chimney in back corner of machine
Steam System (Steam Models Only)
½” steam line, 0- 5 PSI 25 lbs/hr average – Injected
25 lbs/hr average – Recirculating
Wash System
25 Hp pump recirculates approximately 280 GPM @ 55 PSI
Heat: Electric – (3) 9 kW heating elements
Gas – Power Burner - 95,000 BTU input (Natural), 85,000 BTU input (LP)
Injected & Recirculating Steam – 0 to 5 PSI, 25 lbs/hr average
60 gallon wash tank
2” copper drain
2” steam exhaust vent companion flange
(Requires PVC, CPVC, or stainless steel field installed duct)

LVO Manufacturing, Inc.
LVO Manufacturing, Inc.LVO Manufacturing, Inc.
LVO Manufacturing, Inc.
808 N. 2
nd
Avenue E., P.O. Box 188
ock apids, IA 51246
www.lvomfg.com
[phone]
1-800-346-5749 Fax [phone]
5
Electrical Data
Electrical Data for model RW2580 – Electric
208 Volt 230 Volt 460 Volt
25 Hp Pump Motor 64.0 57.0 28.3
Control Circuit 2.0 2.0 2.0
Wash Heater (three 9 kW) 75.0 67.8 33.9
Rinse Heater (three 9 kW) 75.0 67.8 33.9
Total Running Current 216.0 194.6 98.1
Exhaust Fan (Opt.) 2.8 2.7 .35
Electrical Data for model RW2580 – Gas
208 Volt 230 Volt 460 Volt
25 Hp Pump Motor 64.0 57.0 28.3
Control Circuit 4.8 4.3 2.2
Rinse Heater (three 9 kW) 75.0 67.8 33.9
Total Running Current 143.8 129.1 64.4
Exhaust Fan (Opt.) 2.8 2.7 .35
Electrical Data for model RW2580 – Injected or Recirculating Steam
208 Volt 230 Volt 460 Volt
25 Hp Pump Motor 64.0 57.0 28.3
Control Circuit 2.0 2.0 2.0
Total Running Current 66.0 59.0 30.3
Exhaust Fan (Opt.) 2.8 2.7 .35
Electrical Supply to the machine should exceed the figures by the amount required by local codes.
Note: Changing the voltage of the machine in the field requires different heating elements. Contact
the factory if this situation arises.

LVO Manufacturing, Inc.
LVO Manufacturing, Inc.LVO Manufacturing, Inc.
LVO Manufacturing, Inc.
808 N. 2
nd
Avenue E., P.O. Box 188
ock apids, IA 51246
www.lvomfg.com
[phone]
1-800-346-5749 Fax [phone]
6
Warnings & Cautions
General Warnings and Cautions:
. Service work on the machine should be done by either a factory representative or qualified local
service company. Contact the factory if the machine is under warranty.
2. Failure to follow the cleaning guidelines described in this manual will damage the machine and
will void the warranty.
3. This washer must be installed in accordance with local codes, or in the absence of local codes,
installed in accordance with the applicable requirements in the National electrical Code, NFPA 70,
Canadian Electrical Code (CEC), Part , CSA C22. , and Standard for Ventilation Control and Fire
Protection of Commercial Cooking Operations, NFPA 96
Gas Model Warnings and Cautions:
. Installation must conform to local codes and the National Fuel Gas Code, ANSI Z223. .
In Canada: Installation must be in accordance with CGA Standard CAN/CGA-B 49. , Natural Gas
Installation Code or CAN/CGA-B 49.2, Propane Installation Code.
2. Instructions should also be posted in a prominent location describing what to do in the event that
the smell of gas is detected in the vicinity of the machine. (This information can be obtained from
your local gas supplier).
WARNING: IF YOU SMELL GAS, SHUT OFF THE GAS SUPPLY TO THE
APPLIANCE, EXTINGUISH ANY OPEN FLAME, AND TEST ALL JOINTS WITH A
SOAP SOLUTION. IF ODOR PERSISTS, CALL YOUR GAS SUPPLIER
IMMEDIATELY.
AVERTISSEMENT: SI UNE ODEUR DE GAZ EST DÉCELÉE, COUPER
L’ALIMENTATION EN GAZ DE L’APPAREIL, ÉTEINDRE TOUTES LES FLAMMES
ET VÉRIFIER TOUS LES RACCORDS À L’AIDE D’UNE SOLUTION SAVONNEUSE.
SI L’ODEUR PERSISTE, AVERTIR IMMÉDIATEMENT LE FOURNISSEUR DE GAZ.
FOR YOUR SAFETY: DO NOT STORE OR USE GASOLINE OR OTHER
FLAMMABLE VAPORS OR LIQUIDS IN THE VICINITY OF THIS OR ANY OTHER
APPLIANCE.

LVO Manufacturing, Inc.
LVO Manufacturing, Inc.LVO Manufacturing, Inc.
LVO Manufacturing, Inc.
808 N. 2
nd
Avenue E., P.O. Box 188
ock apids, IA 51246
www.lvomfg.com
[phone]
1-800-346-5749 Fax [phone]
7
3. Do not obstruct the flow of ventilation and combustion air to the machine.
4. Gas model rack washers are equipped with an electronic ignition that automatically lights the
burners when the power switch is turned to the “ON” position and there is enough water in the
machine. To shut the burners off, the power switch should be turned to the “OFF” position.

LVO Manufacturing, Inc.
LVO Manufacturing, Inc.LVO Manufacturing, Inc.
LVO Manufacturing, Inc.
808 N. 2
nd
Avenue E., P.O. Box 188
ock apids, IA 51246
www.lvomfg.com
[phone]
1-800-346-5749 Fax [phone]
8
Introduction
This manual should be read and understood by everyone involved with the installation and operation
of the rack washer. Keep this manual in a safe place for future reference. Extra copies or replacement
copies can be purchased from the manufacturer.
Service work on the machine should be done by either a factory representative or qualified local
service company. Contact the factory if the machine is under warranty.
The LVO rack washer is designed for use in bakeries, restaurants, schools, hospitals, and hotels, to
clean pots, pans, bowls, and utensils. LVO rack washers are constructed of 4 gauge stainless steel
(cabinets) and 2 gauge stainless steel (framework). The interior piping, rinse system, wash arms, and
screens are stainless steel. Because of its sturdy construction, it will deliver years of powerful,
thorough cleaning.
The machine is equipped with a heating element in the rinse tank to boost the rinse water to a
sanitizing 80°F at the inlet to the machine. A rinse tank heated with recirculated steam is an option
available on some models.
The wash tank on electric models incorporates three 9 kW electric heating elements for heating the
wash water. The gas models use a 90,000 BTU power burner. Steam models use either a direct
injection system or a recirculated steam heating coil.
The pump recirculates wash water at approximately 55 pounds per square inch of pressure.
Each machine is equipped with two safety switches. The first is a low water cut-off, which shuts the
machine off when the water level in the wash tank falls below the required level. The other safety
device is a door switch, which prevents the machine from operating when the door is not completely
closed. An electrical schematic for your machine is posted inside the control box cover.
Detergent Feeders
This machine must be operated with an automatic detergent feeder, which is supplied by the customer,
including a visual means to verify that detergent is delivered or a visual or audible alarm to signal that
detergent is not available for delivery. Power for the feeder can be provided by the pump supply
connection in the control panel. See feeder equipment manual for additional information.

LVO Manufacturing, Inc.
LVO Manufacturing, Inc.LVO Manufacturing, Inc.
LVO Manufacturing, Inc.
808 N. 2
nd
Avenue E., P.O. Box 188
ock apids, IA 51246
www.lvomfg.com
[phone]
1-800-346-5749 Fax [phone]
9
Installation Instructions
Step 1 READ: Read and understand these instructions thoroughly before attempting any part of the
installation process.
WARNING: Not following these instructions may void warranty, cause
damage to the equipment and/or cause injury to anyone involved in the
installation or operation of this machine.
A copy of the installation instructions and start-up procedure is printed on the sheet attached to
the side of the machine. EVERYONE involved with the installation must be familiar with all
aspects of the installation procedure.
Step 2 POSITIONING: The factory recommends leaving as much room as possible around the
machine for future service work. No less than 6” should be allowed along the sides of the
machine (36” for side with control box), and no less than 2” between the rear of the machine
and the wall. Extra room around the machine will facilitate cleaning the washer area.
Note: Gas models should be installed in a location free of drafts.
Step 3 UNCRATING: Leave the machine fully crated until the washer is placed in the location
where it is to be installed. Inside you will find the accessories for the machine. Among these
will be the fan and the legs (if ordered).
When a pit is used, it can be installed prior to receiving the machine. There are two types of
pit to choose from: concrete or stainless steel. Concrete pits are the most common, and are
usually installed by a general contractor. Note that the drain system will also need to be
installed at this time. Generally, concrete pits are painted to make them waterproof.
A stainless steel pit is available for installations in buildings with basements. The stainless pit
can also be used as a liner with concrete poured around it. The stainless steel pit is equipped
with a coupler to allow the plumber to connect the drain.
Prior to receiving the rack washer, the service lines can be stubbed in close to where the rack
washer will be installed. This will speed up the completion of the installation once the
machine is in place.
There are many methods for setting the machine in the pit. Often, the machine is slid into the
pit from the front. Hydraulic jacks, pry bars, and pallet jacks or a forklift are usually necessary
to accomplish the task. Keep in mind that the heaviest part of the machine is the back where
the pumps are located.

LVO Manufacturing, Inc.
LVO Manufacturing, Inc.LVO Manufacturing, Inc.
LVO Manufacturing, Inc.
808 N. 2
nd
Avenue E., P.O. Box 188
ock apids, IA 51246
www.lvomfg.com
[phone]
1-800-346-5749 Fax [phone]
0
Once the machine is in the pit, the front floor grate(s) should be set in place. The machine
should then be moved ahead to eliminate any gaps between the machine and grates, yet leaving
enough space that the floor grate can be removed for periodic hosing down of the pit floor.
Step 4 DRAIN: Provisions for the drain should be made next. The rack washer has a copper drain
located as shown on the drawings (see specifications page for drain size). The drain should be
plumbed according to local code. Local ordinance may require a grease trap, vent, and/or a
floor sink. If required, these should be installed before the machine is installed. It is strongly
recommended that unions be used to allow the machine to be easily moved. Failure to do so
may void the warranty.
Models that sit in a pit do not require a drain connection, as the wash tank drains directly into
the pit.
Step 5 WATER SUPPLY HOOK-UP: The factory recommends 40°F hot water at the machine
(see specifications page for water line size). This may require a dedicated water heater for the
rack washer. If hard water is present, the manufacturer recommends installing a water softener
or calcium filter. Hard water deposits will shorten the life of many of the components on the
rack washer, resulting in higher maintenance costs. Please note that a union is installed at the
point of hook-up (see drawings). This will allow the machine to be moved for service and
cleaning. The customer must furnish a shut-off valve on the supply side of the union. This
shut-off should be easily accessible to the operator of the machine. Additionally, if the
machine is located a long distance from the water main, it may be necessary to supply a larger
line to the machine to insure proper water pressure and flow for the machine to operate
correctly.
Step 6 STEAM VENT: The machine is equipped with a collar for 2” duct work as shown on the
drawings. This duct should be directly vented to the outside of the building. DO NOT vent
into a wall, attic, or any other concealed space of the building, and avoid horizontal runs of
duct.
The factory recommends 2” plastic pipe or stainless steel duct for the vent. If stainless steel
is used, the duct work should be installed with reverse joints so that the condensate inside the
vent can drain back into the machine without leaking, and all seams should be sealed with
silicone sealant.
Generally, the machine ships with a Hp squirrel cage exhaust fan. The exhaust fan should be
mounted and silicone directly to the flange on the top of the machine before the duct is
installed. The ductwork attaches directly to the exhaust of the fan. Wire is provided to wire
the fan directly into the control panel. A dedicated circuit breaker and contactor for the fan are

LVO Manufacturing, Inc.
LVO Manufacturing, Inc.LVO Manufacturing, Inc.
LVO Manufacturing, Inc.
808 N. 2
nd
Avenue E., P.O. Box 188
ock apids, IA 51246
www.lvomfg.com
[phone]
1-800-346-5749 Fax [phone]
provided. The fan is controlled by a timer and runs for a short time at the end of the cycle, and
when the door of the machine is open.
Note: Consult the factory before connecting any fan not supplied with the machine.
While the machine is designed to be directly connected to a vent, local or state codes may
require a hood to be installed. Always check the local regulations prior to installing the vent.
Step 7 ELECTRICAL CONNECTIONS: The electrical connection to the machine should be made
by a qualified electrician. All steps should be taken to insure that the supply voltage to the
machine is the same as the rated voltage of the machine. Also, check that sufficient amperage
is supplied to the machine (see specifications page for ratings).
A main power shut-off, supplied by the customer, must be installed near the machine in a
place easily accessible by anyone operating or servicing the machine. The line from the main
shut-off to the machine should be watertight flex conduit. The factory strongly recommends
that a few extra feet be used to allow the machine to be moved if necessary. The wire used to
supply the machine must be heavy enough to carry the amperage load of the machine.
The first connection should be the main ground to the grounding lug at the lower right hand
corner of the control panel. Next, the hook-up can be made to the main power block.
Once the hook-up is complete, the circuit breakers in the control box of the washer must be
checked to make sure they are in the “OFF” position. The main switch on the wall can then be
turned on to power the machine.
Step 8 GAS CONNECTION (Gas Machines Only): A certified gas technician is required for the
hook-up and final adjustments of the burners. This is necessary to insure proper inlet and
manifold pressure for the gas machines (see spec page for gas pressure settings).
The gas line hook-up must be made with a union at the location shown on the gas machine
drawing (see spec page for gas line size). This line must have a shut-off valve (supplied by the
customer) installed near the machine and accessible by anyone operating or servicing the
machine.
A 4” stainless steel gas chimney runs up the back corner of the machine. A 6” draft diverter
and a 4” to 6” adapter are included with the machine (shipped inside the machine with the
other accessories). The adapter and draft diverter must be installed on top of the factory
installed chimney. The 6” Type B gas flue can then be continued to the outside of the building
per local codes.

LVO Manufacturing, Inc.
LVO Manufacturing, Inc.LVO Manufacturing, Inc.
LVO Manufacturing, Inc.
808 N. 2
nd
Avenue E., P.O. Box 188
ock apids, IA 51246
www.lvomfg.com
[phone]
1-800-346-5749 Fax [phone]
2
The initial start-up of the burners should not be done until the start-up procedures for the
machine on the following pages have been completed.
Step 9 STEAM CONNECTION (Steam Machines Only): A steam line is required to supply the
steam injector or recirculated steam heat exchanger coil (see spec page for size of steam line).
A strainer is already built into the machine but a union will be required in the supply line
(supplied by the customer). The specification sheet above lists the rated pressure and average
steam consumption rate for the machine.

LVO Manufacturing, Inc.
LVO Manufacturing, Inc.LVO Manufacturing, Inc.
LVO Manufacturing, Inc.
808 N. 2
nd
Avenue E., P.O. Box 188
ock apids, IA 51246
www.lvomfg.com
[phone]
1-800-346-5749 Fax [phone]
3
Startup Procedures
Warning: These instructions must be followed or damage to the machine will result.
Step 1: Close drain valve. See drawings for location. On machines equipped with and Auto Drain
option, the drain valve will automatically close when the Auto Fill button is pushed.
Step 2: With the circuit breakers in the control panel of the machine in the “OFF” position and the
main power supply to the machine connected, the ON-OFF switch on the button panel can
be turned to the “ON” position. Then wait approximately 5 seconds for the machine
controller to power up.
Note: The amber power light will not turn on until there is sufficient water in the machine.
Step 3: Fill the machine by pressing the Auto Fill button. The machine will continue to fill for 90
seconds past the point where the low water protection device is energized, turning on the
power light and temperature controllers. The machine is equipped with a low water
protection device and will not run without sufficient water in the wash tank.
Note: The machine has a door switch and will not operate with the door partially open.
Step 4: With the machine full of water and with the door closed, press the start button and let the
machine go through a complete cycle. The timers in the control panel will go through their
sequence, lighting the wash and rinse lights on the front of the machine. The cycle is
complete when the red light goes off and the amber light stays on. The pump will not run at
this time because the pump circuit breaker in the control panel is in the “OFF” position.
Step 5: Repeat Step 4 at least two times or until water can be heard spraying out of the rinse nozzles.
This ensures that the rinse tank is full of water before the heating element is energized.
Step 6: All circuit breakers in the control panel can now be switched to the “ON” position. This will
energize the heating system in the wash and rinse tanks.
Step 7: Check the pumps for proper rotation by pressing the start button and observing the wash
pressure gauge on the front of the machine for 5 to 0 seconds. Then press the stop button.
The wash pressure should be 45-60 psi. If the pressure is erratic and only rises to about 20
psi, the pumps are running backwards. The pumps will also have a noticeable growl when
running backwards. Disconnect power to the machine and reverse the outside two wires that
feed the power block in the control panel. Reconnect power and run the pump again to
confirm that it is operating correctly.

LVO Manufacturing, Inc.
LVO Manufacturing, Inc.LVO Manufacturing, Inc.
LVO Manufacturing, Inc.
808 N. 2
nd
Avenue E., P.O. Box 188
ock apids, IA 51246
www.lvomfg.com
[phone]
1-800-346-5749 Fax [phone]
4
Step 8: With the power on, the wash and rinse heating systems should be checked. The rinse tank
should take 5 to 0 minutes to reach 200°F and the wash should take approximately 60
minutes to reach 60°F. The times will vary depending on the temperature of the incoming
water. Note: The rinse manifold gauge measures the temperature of the rinse water just
before it enters the machine. Therefore, this temperature reading is only accurate while the
machine is rinsing.
If the machine is not reaching temperature, check to make sure that all the breakers in the
control panel are in the “ON” position. If the wash tank is gas heated, make certain the main
gas valve is open. During initial start-up, gas machines may have to the gas control reset
several times to bleed the air out of the gas lines. If the machine still does not appear to be
heating up properly, call LVO Manufacturing at -800-346-5749.
Step 9: Set the rinse pressure by changing the pressure adjustment valve located on the back of the
machine. The pressure should be set at 20 psi on the rinse gauge while the machine is
rinsing. Variations in building water pressure may require the pressure to be increased or
decreased from its factory setting.
Step 10: Machines are equipped with an Auto Fill and have a timer in the electrical panel that
controls the fill valve. Adjust the timer so that the machine fills to the overflow tube (or
until water just begins to run out of the machine’s drain) when the Auto Fill button is
pressed.
Step 11: If the machine is equipped with the fan option, (see Step 6 in the Installation Instructions for
a description of the fan option) verify that it is rotating in the correct direction. If the fan is
blowing into the machine rather than out the vent, switch the two outside wires on the three
phase connection in the control panel. Recheck to confirm proper rotation.
Step 12: Replace all covers and peel off the plastic protective coating, tape, etc. from the machine that
may have been used to prepare the machine for shipping.

LVO Manufacturing, Inc.
LVO Manufacturing, Inc.LVO Manufacturing, Inc.
LVO Manufacturing, Inc.
808 N. 2
nd
Avenue E., P.O. Box 188
ock apids, IA 51246
www.lvomfg.com
[phone]
1-800-346-5749 Fax [phone]
5
Sequence of Operation
 Power switch is switched “ON”
 Control panel logic control is energized
 Fill button energizes the fill solenoid
 Low water safety switch closes terminals and 4 in the control panel if there is sufficient
water in the wash tank
 Amber indicator light comes on
 Wash and rinse temp controls are energized
 Temp controls energize wash and rinse heating systems
 Door safety switch is energized
 Stop and Start buttons are energized
 Start button is pushed energizing the internal timing functions of the logic control
 Red indicator light is energized
 Wash timer (Light, Medium, or Heavy) starts, energizing the pump contactor for set amount of
time
 Wash time runs out energizing the rest timer
 After set amount of rest time, the rinse timer starts, energizing the rinse solenoid valve and
clear indicator light
 If the machine is equipped with the exhaust fan option, the fan timer runs for the set time when
the rinse cycle is completed
 After the rinse timer (or optional fan timer) has timed out, all timers are reset, and the red
indicator light is de-energized

LVO Manufacturing, Inc.
LVO Manufacturing, Inc.LVO Manufacturing, Inc.
LVO Manufacturing, Inc.
808 N. 2
nd
Avenue E., P.O. Box 188
ock apids, IA 51246
www.lvomfg.com
[phone]
1-800-346-5749 Fax [phone]
6
Operation of Machine
Initial Daily Startup
. Check if the inside of the machine has been properly cleaned since its last use. If not, clean
the machine (refer to Final Clean-Up on the following page for cleaning information).
2. Make sure scrap tray screens and the pump inlet screens are in place.
WARNING: Do not operate washer without all screens in place.
3. Close the drain valve.
4. Turn power switch to “ON” position, allow approximately 5 seconds for the internal logic
controller to power up, and push the Auto Fill button to fill the unit.
5. Allow wash and rinse temperatures to come up to recommended levels.
6. While machine is warming up, the first load can be prepared and placed in the machine. If the
pans are excessively dirty, they should be pre-soaked and scraped before being placed in
the rack. Pan preparation will reduce the need to change the wash water and will speed-up
the entire washing process. The correct manner for loading the racks is illustrated on the
drawings later in this manual.
7. Once the machine has reached the recommended temperatures, detergent should be added to
the wash water. Detergent should be used according to the recommendations of the
chemical supplier. A non-suds detergent is necessary and local water conditions should be
considered when selecting the concentration of the detergent. An automatic soap dispenser
should be installed at the job site by the chemical supplier. There should be a visible or
audible means of determining detergent delivery. If they have any questions concerning
the installation of their dispenser to the LVO rack washer, they can call the factory for
advice (800-346-5749).
8. The rack of pans can now be placed in the machine. The rack should be centered in the
machine to subject the pans to the full force of the spray arms.
WARNING: Loose items and glassware should not be put in the washer. The high
pressure wash cycle will damage them and potentially the machine.
Bowls or buckets can be washed by placing them in the bowl/utensil rack with the tops
toward the lower side of the shelf to facilitate draining.
The utensil basket is to be used to contain smaller items such as paddles, whisks, scrapers,
etc.
CAUTION: When loading the machine make sure that nothing will obstruct the path of
the wash arms. This will avoid damage to the machine and to the items being washed.

LVO Manufacturing, Inc.
LVO Manufacturing, Inc.LVO Manufacturing, Inc.
LVO Manufacturing, Inc.
808 N. 2
nd
Avenue E., P.O. Box 188
ock apids, IA 51246
www.lvomfg.com
[phone]
1-800-346-5749 Fax [phone]
7
When loading bowls, pans, or buckets into the machine make sure they are loaded in a
manner that will allow the wash water to drain out of them.
9. The machine cycle is completely automatic with adjustable wash, rest, and rinse timers. The
timers are located in the control panel and are factory set to the following recommended
values:
Wash: Light 3 Min
Medium 5 Min
Heavy 7 Min
Rest: 20 Sec
Rinse: 60 Sec
Fan (Optional) 30 Sec
Select length of wash (Light/Medium/High) with the 3 position selector on the button
panel and push the green start button to initiate the wash cycle. The red indicator light will
come on. At the end of the wash cycle, the red light will stay on and the 20 sec rest will
begin. The rest period allows the wash water and suds to drain from the pans. After the
rest cycle, the rinse cycle begins. During the rinse cycle, the clear indicator light will come
on. If the machine is equipped with a fan timer (see above for a description of the fan), the
fan will start after the rinse is finished. After the rinse or fan cycle is finished, the red light
will go off. The cycle is now complete. The amber power light will stay on as long as the
power switch is in the “ON” position and there is enough water in the machine.
0. Throughout the day as the machine is being used, the scrap tray screens should be periodically
removed from the machine, dumped out, washed out in the sink and replaced in the
machine.
Final Cleanup
At the end of each day’s use, the operator of the machine must clean the machine according to the
following procedure:
. Check and clean any plugged wash nozzles. Use a piece of wire to push any obstruction
out of the nozzle into the wash arm. When all of the nozzles have been cleared, close
the door; push the start button running the machine for a few seconds to blow the
debris out of the wash arms. Push the red “STOP” button. If necessary, the wash arm
assembly can be removed by pulling out the grip ring pin and sliding the assembly out
of the hub.
2. Turn the machine off and open the drain valve. For machines equipped with the Auto
Drain option, press Drain Button.
3. Remove the scrap trays, dump them out, and wash them off in the sink.

LVO Manufacturing, Inc.
LVO Manufacturing, Inc.LVO Manufacturing, Inc.
LVO Manufacturing, Inc.
808 N. 2
nd
Avenue E., P.O. Box 188
ock apids, IA 51246
www.lvomfg.com
[phone]
1-800-346-5749 Fax [phone]
8
4. Spray down the inside of the machine.
5. Brush off the heating element (electric models) and anywhere that doesn’t come clean
from spraying with the hose.
Note: On electric models, brushing the element is very important in prolonging
the life of the element.
6. Check and clean the rinse nozzles.
7. Spray down the inside of the machine again.
8. Remove the pump inlet screen and clean it thoroughly in the sink.
Note: While removing the screen be careful not to allow any debris to fall into the
pump inlet opening.
9. Replace the pump inlet screen, scrap tray screens, and floor grates.
0. Close the drain and leave the machine empty of water until it is to be used again.
. (For pit models only) Remove the front floor grate(s) and spray pit floor from front toward
the rear. Clean the pit drain thoroughly. Water backup from a clogged drain will cause
major burner damage! DO NOT allow overspray on the burner when cleaning. Burner
firing problems will result. When cleaning is complete, replace the floor grate(s).

LVO Manufacturing, Inc.
LVO Manufacturing, Inc.LVO Manufacturing, Inc.
LVO Manufacturing, Inc.
808 N. 2
nd
Avenue E., P.O. Box 188
ock apids, IA 51246
www.lvomfg.com
[phone]
1-800-346-5749 Fax [phone]
9
Preventative Maintenance
● Turn off power and drain machine, making sure it drains freely.
● Check machine for general cleanliness. Make sure the pump screen and scrap trays are clean and
properly in place. Wash heating elements (electric models only) must be cleaned on a daily basis
for proper operation. Check for plugged wash and rinse nozzles. If necessary, the entire wash arm
assembly can be removed by pulling out the grip ring pin and sliding the assembly out of the hub.
These items are part of the daily maintenance schedule.
○ Check for excessive play in the hub/wash arm assemblies. Excessive wear can affect the wash
pressure and shorten the life of some hub components. Hub repair kits are available from the
factory.
○ Close drain valve and fill machine, making sure drain does not leak (some water may initially run
out of the drain through the overflow). Run through a Light, Medium, and Heavy wash cycle,
checking for proper timer operation.
● Check if Power, Wash, and Rinse lights are working.
● Check if pump pressure during wash cycle is within recommended range (45-60 psi).
● Check if rinse pressure is approximately 20 psi. Note: This must be checked during rinse cycle for
accurate reading.
○ Make sure steam exhaust fan is working properly. See Step 6 in the Installation Instructions for
proper operation.
● Allow machine to heat up to recommended temperatures, making sure the temperature controls are
operating properly. Wash temperature and Rinse Tank temperature should be noted at this time.
The rinse water temperature gauge is accurate only during rinse cycle and should be checked
while machine is rinsing.
Note: If a qualified technician is available, current readings for heating elements should be taken
to ensure they are heating properly.
○ Machines with slide-up doors, door cables and connections should be inspected for damage or
excessive wear and replaced if necessary. Make sure cable pulleys turn freely and door switch is
still adjusted properly.
○ Pump motor(s) should be greased occasionally depending on usage. Once or twice yearly should
be sufficient under normal use.
Note:
Items above marked ● are easily identified visually and should be checked on a daily basis. Other
items should be checked periodically, depending on usage.
Time required for complete inspection may vary, depending on wash timer settings, heat up time, etc.
One to two hours is a reasonable amount of time unless problems are encountered that need attention.
If any problems or questions arise, call the factory for assistance.

LVO Manufacturing, Inc.
LVO Manufacturing, Inc.LVO Manufacturing, Inc.
LVO Manufacturing, Inc.
808 N. 2
nd
Avenue E., P.O. Box 188
ock apids, IA 51246
www.lvomfg.com
[phone]
1-800-346-5749 Fax [phone]
20
Trouble Shooting – Electric Machines
Problem Cause Cure
Machine won’t run No power to machine Check building power supply
Not enough water Fill machine until overflowing
Door open Close door tightly
Wash pressure too high Nozzles plugged Remove debris from nozzles
Wash pressure too low Pump running backwards See Installation Instructions
Pump screen clogged See Cleaning Instructions
Excessive suds Change soap or use less
Missing wash nozzles Replace nozzles or wash arm
Upper pump not starting Check pressure switch
Wash temperature too low Thermostat set too low Adjust wash thermostat*
Wash element blown Replace wash heating element
Rinse temperature too low Thermostat set too low Adjust rinse thermostat*
Water supply too cold Set building hot water at 40°F
Rinse element blown Replace rinse heating element
No rinse water Nozzles plugged See Cleaning Instructions
Solenoid valve stuck Clean or replace solenoid valve
Rinse strainer clogged Clean pressure regulator/strainer
Rinse does not shut off Rinse solenoid stuck open Clean or replace solenoid valve
Utensils not clean Wash time too short Use longer wash
Water too hard Install softener
Wash temperature too low Adjust thermostat*
Detergent problem Consult chemical supplier
Improper stacking of utensils See racking instructions
* WARNING: Do not set rinse thermostat above the boiling point of water. The boiling point of
water decreases with increased elevation at approximately 2°F per 000 ft of elevation.