LVO Manufacturing RW1548 User 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]
__________________________________________________________________________________________________________________________________________________________________
1
W A R R A N T Y
LVO Manufacturing Inc. warrants equipment manufactured by it to be free from defects in material
and workmanship for a period of one (1 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 it's 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
1 Locate and record the 12 digit serial number located on the upper left-hand side of the pan 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]
__________________________________________________________________________________________________________________________________________________________________
2
Table of Contents
Warranty 1
Table of Contents 2
Specifications 3
Electrical Data Breakdown 4
Warnings and Cautions 5
Introduction 6
Installation Instructions 7
Start-Up Procedures 11
Sequence of Operation 13
Operation of Machine 14
Trouble Shooting - Electric Machine 17
Trouble Shooting - Gas Machine 18
Trouble Shooting - Steam Machine 18
Parts List 19
Preventive Maintenance 21A
Drawings:
General View 22
Floor Model with Ramp 23
Three View: - Gas Wash Heat - Pit Model 24
Three View - Electric Wash Heat - Floor Model 25
Three View - Steam Wash Heat - Floor Model 26
Concrete Pit Specifications 27
Stainless Steel Pit - General 28
Stainless Steel Pit Liner - Top View 29
Stainless Steel Pit Liner - Side View 30
Bun Pan Rack 31
Cake Pan Rack 32
Bowl/Utensil Rack 33
Rinse System 34
Floor Grate and Screen Location 35
Electric Wash Heat - Control Circuit Ladder Diagram 36
Gas or Steam Wash Heat - Control Circuit Ladder Diagram 37
Electric Wash Heat - Control Circuit Schematic with 700 cfm Fan 38
Gas Wash Heat - Control Circuit Schematic with 700 cfm Fan 39
Steam Wash Heat - Control Circuit Schematic with 700 cfm Fan 40
Trouble Shooting Flowchart 41

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
RW1548 SPECIFICATIONS
OVERALL DIMENSIONS
WIDTH = 57” (60” WITH SIDE SUPPORT ANGLES
DEPTH = 65”
HEIGHT (OVERALL = 92-1/2” (94-1/2” GAS
HEIGHT (PIT MODEL = 81-1/2” ABOVE FLOOR
HOT WATER SYSTEM
1” HOT WATER SUPPLY REQUIRED, UNION PROVIDED
140° F. WATER REQUIRED AT THE MACHINE
168 GPH AT 20 PSI (14 GAL./CYCLE x 12 CYCLES/HR.
RINSE BOOSTER: TWO 9kW HEATING ELEMENTS IN A 20 GAL. RINSE TANK
FULL LOAD AMPS
208 VOLT 230 VOLT 460 VOLT
ELECTRIC 133.1 122.3 62.1
GAS/STEAM (INJECTED 95.6 88.4 45.2
STEAM (RECIRCULATING 45.6 43.2 22.6
GAS SYSTEM (GAS MACHINES ONLY
½” GAS SUPPLY CONNECTION
NATURAL: 7” W.C. MINIMUM INLET, 6” W.C. MAIN MANIFOLD = 66,000 BTU
PROPANE: 11” W.C. MINIMUM INLET, 10” W.C. MAIN MANIFOLD = 66,000 BTU
4” STAINLESS STEEL CHIMNEY
STEAM SYSTEM (STEAM MODELS ONLY
¾” STEAM LINE, 10-15 PSI - 37 LBS. / HR. AVERAGE – INJECTED
76 LBS. / HR. AVERAGE – RECIRCULATING
WASH SYSTEM
10 HP & 5 HP PUMPS IN SERIES RECIRCULATE APPROXIMATELY 240 GPM @ 60 PSI.
HEAT: >ELECTRIC – ONE 9 kW AND ONE 4.5 kW HEATING ELEMENT
>GAS – THREE 22,000 BTU RATED INFRARED BURNERS = 66,000 BTU
>STEAM – DIRECT INJECTION, 10-15 PSI, 37 LBS / HR AVERAGE
RECIRCULATED, 10-15 PSI, 76 LBS / HR AVERAGE
65 GALLON WASH TANK
1-1/2” COPPER DRAIN
8” STEAM EXHAUST VENT COMPANION FLANGE

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
Electrical Data for MODELS RW1548 - Electric
Voltage 208 230 460
Phase 3 3 3
Pump Motor (5HP + 10HP 43.6 41.2 20.6
Control Circuit 2.0 2.0 2.0
Wash Heaters (one 9kW + one 4.5kW 39.5 35.9 18.9
Rinse Heaters (two 9kW 50.0 45.2 22.6
Total 133 1 122 3 62 1
Exhaust Fan (Opt. 2.0 2.0 2.0
Electrical Data for MODELS RW1548 - Gas
Voltage 208 230 460
Phase 3 3 3
Pump Motor (5HP + 10HP 43.6 41.2 20.6
Control Circuit 2.0 2.0 2.0
Rinse Heater (two 9kW 50.0 45.2 22.6
Total 95 6 88 4 45 2
Exhaust Fan (Opt. 2.0 2.0 2.0
Electrical Data for MODELS RW1548 - Steam
Voltage 208 230 460
Phase 3 3 3
Pump Motor (5HP + 10HP 43.6 41.2 20.6
Control Circuit 2.0 2.0 2.0
Total 45 6 43 2 22 6
Exhaust Fan (Opt. 2.0 2.0 2.0
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]
__________________________________________________________________________________________________________________________________________________________________
5
General Warnings and Cautions
1. 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.
Gas Model Warnings and Cautions:
1. Installation must conform with local codes and the National Fuel Gas Code, ANSI Z223.1.
In Canada: Installation must be in accordance with CGA Standard CAN/CGA-B149.1, Natural Gas
Installation Code or CAN/CGA-B149.2, 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 .
3. Do not obstruct the flow of ventilation and combustion air to the machine.
4. Gas model pan washers are equipped with an electronic ignition which 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.
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]
__________________________________________________________________________________________________________________________________________________________________
6
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 racks, pots, pans, bowls, and utensils. LVO rack washers are constructed of 14 gauge stainless
steel (cabinets and 12 gauge stainless steel (framework . The interior piping, rinse system, wash
arms, and screens are stainless steel. The control panel is assembled with UL approved components
and is housed in a stainless steel control box. Because of its sturdy construction, it will deliver years
of powerful, thorough cleaning.
The machine is equipped with heating element(s in the rinse tank to boost the rinse water to a
sanitizing 180 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 heating element(s for heating the wash water. The gas
models use a series of 22,000 BTU infrared burners. Steam models use 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, 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]
__________________________________________________________________________________________________________________________________________________________________
7
Installation Instructions
Step 1 READ: Read and understand these instructions thoroughly before attempting any part of the
installation procedure.
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 yellow 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 16" should be allowed along the sides of the
machine (36" for side with control box and no less than 12" 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 . The legs are adjustable by turning the small end one
way or the other. Legs are not required for pit models.
When a pit is used it can be installed prior to receiving the machine. There are two types of
pits to choose from: concrete (see page 27 or stainless steel (see pages 28 - 30 . Concrete
pits are the most common. They are usually installed by a general contractor. Note that the
drain system will also be installed at this time. Generally concrete pits are painted to make
them water proof.
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 (see pages 28 - 30 .
Prior to receiving the rack washer, the service lines can be stubbed in close to where the rack
washer will be installed (see page 22 . This will speed up the completion of the installation
once the machine is in place.

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
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 backside
where the pumps are located.
Once the machine is in the pit, the front floor grate should be set in place. The machine
should then be moved ahead to eliminate any gaps between the machine and the floor grate
yet leaving enough a 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 pages 24 - 26 of this manual (see page 3 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 set in a pit do not require a drain connection because the wash tank drains
directly into the pit.
Step 5 WATER SUPPLY HOOK-UP: The factory recommends 140° F (120° F minimum hot
water at the machine (see page 3 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 pages 24 - 26 . 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.
Step 6 STEAM VENT: The machine is equipped with a collar for 8" duct work as shown on pages
24 - 26. 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 8" 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. All seams should also be sealed with
silicon.
Generally the machine is ordered with a 700 cfm, 1/2 Hp squirrel cage fan. The 700 cfm fan
and adapter (provided should be mounted and siliconed directly to a flange on the top of the
machine before the duct work 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 breaker and

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
contactor for the 700 cfm fan are provided. The 700 cfm fan is controlled by a timer and runs
for a short time at the end of each cycle.
Note: Consult the factory before connecting any fan not supplied with the machine
Step 7 ELECTRICAL CONNECTION: 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 page 3 or page 4 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 on the control panel.
Next the hook-up can be made to the main power block. On 230 VAC machines the wild leg
must be connected to the center terminal.
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 models 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 page 3 for gas pressure settings .
Verify the type of gas supply to be used, either natural or LP, and make sure the marking on
the gas data plate agrees with that of the supply. The gas line hook-up must be made with a
union at the location shown on page 24 (see page 3 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 stainless steel gas chimney runs up the backside of the machine (see page 3 for size of
chimney . A draft diverter is included with the machine (shipped inside the machine with the
other accessories . The draft diverter must be installed on top of the factory installed
chimney. The Type B gas flue can then be continued to the outside of the building per local
codes.
The initial start-up of the burners should not be done until the following start-up procedures
for the machine have been completed.

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]
__________________________________________________________________________________________________________________________________________________________________
10
Step 9 STEAM HOOKUP (Steam models only): A steam line is required to supply the steam
injector or recirculated steam heat exchanger coil (see page 3 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 on page 3 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]
__________________________________________________________________________________________________________________________________________________________________
11
Start-Up Procedures
Warning: These instructions must be followed or damage to the machine will result.
Step 1: Close the drain valve (see location on page 24 - 26 . On machines equipped with Auto Fill
and Auto Drain, the drain valve will automatically close when the Auto Fill button is pushed.
Step 2: Open the main water supply valve (if the machine is equipped with the Auto Fill option skip
to Step 3 , then open the fill valve (see location on pages 24 - 26 . Fill the machine to the top
of the scrap trays. The machine is equipped with a low water protection device and will
not run without sufficient water in the wash tank
Step 3: 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. This should light the amber power light. If not, check this bulb
and the other two bulbs to make certain they are tight.
Machines equipped with the Auto Fill option can now be filled by pressing the Auto Fill
button. (If the building pressure is quite high, some water may run out the overflow at the end
of the fill cycle .
Note: The machine has a door safety 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 clear and red light go 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 one more time 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 pump for proper rotation by pressing the start button and observing the wash
pressure gauge on the front of the machine for 5 to 10 seconds. Then press the stop button.
The wash pressure should be 45 - 60 psi. If the pressure is erratic and only rises to about 25
psi, the pump is running backwards. The pump will also have a noticeable growl when
running backwards. The outside two wires that feed the power block in the control panel
should be reversed. 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]
__________________________________________________________________________________________________________________________________________________________________
12
Step 8: With the power on, the wash and rinse heating systems should be checked. The rinse tank
should take 5 to 10 minutes to reach 195 F and the wash should take approximately 60
minutes to reach 150 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 that main
gas valve and the gas valve in the control panel are open. During initial start-up gas machines
may have to be turned on and off several times to bleed the air out of the gas lines. Wait
about a minute after turning the machine off before turning it back on. If the machine still
does not appear to be heating up properly call LVO Manufacturing at 1-800-346-5749.
Step 9: Adjust the pressure regulator (see location on pages 24 - 26 . 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: If the machine is equipped with the 700 cfm fan option (see page 8 for a description of the
fan option check to make sure that it is rotating in the correct direction. If the fan is
blowing into the machine rather than out the vent the two outside wires on the three phase fan
connection in the control panel need to be swapped. Recheck to confirm proper rotation.
Step 11: Replace all covers and peel off the plastic protective coating and tape etc. from the machine
which 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]
__________________________________________________________________________________________________________________________________________________________________
13
Sequence of Operation
-Power switch "ON".
-LOGO logic control is energized.
-Fill button (optional energizes fill solenoid.
-Low water safety switch closes terminals 1 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 times out.
-After the rinse timer (or optional fan timer has timed out, all timers are reset, and the red/clear
indicator lights are 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]
__________________________________________________________________________________________________________________________________________________________________
14
Operation of the Machine
Initial Daily Start-Up
1. 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 screen are in place (see page 35 .
WARNING: Do not operate washer without all screens in place
3. Close the drain valve.
4. Open fill valve and fill wash tank to the top of the scrap trays or until water begins to run out of
the overflow. If the machine is equipped with the Auto Fill option push the Auto Fill button
to fill the unit.
5. Turn power "ON" and 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 pages 31 -
33
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.
The utensil basket can be placed in the bowl/utensil rack and washed along with a load of
bowls or buckets.
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.
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.

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]
__________________________________________________________________________________________________________________________________________________________________
15
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.
(Note: On machines equipped with a logic control, the timer and relay functions are performed
internally.
Select the 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 page 8 for a description of the fan options the fan
will start after the rinse is finished. After the rinse or fan cycle is finished the red and clear
lights 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.
10. Throughout the day as the machine is being used, the scrap tray screens (see page 35 for
location of screens should be periodically removed from the machine, dumped out, washed
out in the sink and replaced in the machine.
Final Clean-Up
At the end of each day's use, the operator of the machine must clean the machine according to the
following procedure:
1. Check and clean any plugged wash nozzles.
If necessary, the wash arm assembly can be removed by pulling out the grip ring pin, sliding
the assembly out of the hub, and rinsing with the spray gun.
2. Drain the machine.
3. Remove the floor grates and scrap trays (see page 35 for location , empty them out and wash them
off in the sink.
4. Spray down the inside of the machine.
5. Brush off the heating element (electric models , probes, and anyplace that doesn't come clean from
spraying with the hose.
NOTE: (Electric Models) Brushing the element clean is very important in
prolonging the life of the element

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]
__________________________________________________________________________________________________________________________________________________________________
16
6. Check and clean the rinse nozzles with a piece of wire to keep them from plugging up with lime
and scale.
7. Spray down the inside of the machine again.
8. Remove the pump inlet screen (see page 35 for location of 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 and the scrap tray screens.
10. Close the drain and leave the machine empty of water until it is to be used again.
11. (For Pit Models Only Remove front floor grate(s and spray pit floor from front toward the rear.
Clean pit drain thoroughly. Water back-up from a clogged drain will cause major burner
damage! DO NOT allow overspray on burner when cleaning. Burner firing problems will
result. When cleaning is completed, replace 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]
__________________________________________________________________________________________________________________________________________________________________
17
Trouble Shooting - Electric Machines
Problem Cause Cure
Machine won't run No power to machine Check building power supply
Not enough water Fill machine to overflow level
Door open Close door tightly
Wash pressure too high Nozzles plugged Remove debris from nozzles
Wash pressure too low Pump running backward See installation instructions
Pump screen clogged See cleaning instructions
Excessive suds Change soap or use less
Missing wash nozzles Replace nozzles or wash arm
Missing wash arm end plugs Replace wash arm end plugs
Wash temperature too low Temp Control set too low Adjust wash temp control*
Wash element blown Replace wash heating element
Rinse temperature too low Temp Control set too low Adjust rinse temp control*
Water supply too cold Set building hot water to 140° F
Rinse element blown Replace rinse heating element
No rinse water Nozzles plugged See cleaning instructions
Solenoid valve stuck Clean solenoid valve or replace
Rinse strainer clogged Clean pressure regulator/strainer
Rinse does not shut off Rinse solenoid stuck open Clean or replace solenoid valve
Faulty rinse timer** Replace rinse timer
Utensils not clean Wash time too short Use a 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
** On machines equipped with a logic control, timer and relay functions are performed internally.
* Wash and rinse temp controls are located on the gauge panel on the front/side of machine.
WARNING: Do not set rinse temp control above the boiling point of water. The boiling point of
water decreases with increased elevation at approximately 2° F per 1000 ft of elevation.

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]
__________________________________________________________________________________________________________________________________________________________________
18
Trouble Shooting - Gas Machines
(Same as electric model except for the following
Low wash temperature
1. Check temp control setting.*
2. Check switches, fuses, and breakers that control the burners.
3. Check to be sure electrical power and gas supply have not been interrupted to the burners.
4. Check that all shut-off valves in the gas line and main gas valve are in the "OPEN"
position.
5. Reset ignition control and try again. To reset control:
a. Turn on-off selector switch to the "OFF" position.
b. Wait one minute, turn power switch "ON".
6. If above steps do not light the main burner, call your local gas appliance service technician.
Provide the person working on the machine with the ignition system information
included with this owner's manual.
WARNING: Do not attempt to light the burner manually
Trouble Shooting - Steam Machines
(Same as electric model except for the following
Low wash temperature
1. Check temp control setting.*
2. Check boiler pressure.
3. Check to be sure electric signal is being sent to the steam solenoid.
4. Verify that strainer in steam line is open.
5. Check steam solenoid.
* Wash and rinse temp controls are located on the front/side of the machine.
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 1000 ft of elevation.

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]
__________________________________________________________________________________________________________________________________________________________________
19
RW1548 Replacement Parts List
HEATING PARTS
PART NUMBER DESCRIPTION
509-5004 WASH & RINSE ELEMENT, 9KW 208 VOLT
509-5005 WASH & RINSE ELEMENT, 9KW 240 VOLT
509-5006 WASH & RINSE ELEMENT, 9KW 480 VOLT
509-5132 HIGH LIMIT THERMOSTAT
509-5016 INFRARED BURNER
509-5019 IMMERSION WELL
509-5026 NWH 1/2" STEAM INJECTOR (INJ. STEAM MODEL
510-5164 1/2" STEAM SOLENOID 24V (STEAM MODEL
509-5050 DIRECT SPARK IGNITION GAS VALVE
509-5051 DIRECT SPARK IGNITION CONTROL MODULE
509-5052 SPARK IGNITOR
509-5053 FLAME SENSOR
509-5064 IGNITION CABLE, 8’6”
509-5094 5”-7” GAS REGULATOR CONVERSION KIT
509-5097 7”-11” GAS REGULATOR CONVERSION KIT
511-5127 SENSOR WIRE
509-5099 LP GAS ORIFICE (#54
509-5100 NAT. GAS ORIFICE (#45
WASH SYSTEM PARTS
PART NUMBER DESCRIPTION
103-2025 HUB ASSEMBLY
103-2048 BASIC HUB REPAIR KIT
103-2049 COMPLETE HUB REPAIR KIT
519-5038 GRIP RING PIN FOR HUB
503-5019 3/4" THREADED PIPE PLUG
510-5089 5 HP BERLELEY PUMP & MOTOR 208-230/460 VOLT
510-5090 10 HP BERKELEY PUMP & MOTOR 208-230/460 VOLT
510 5100 PUMP IMPELLER – 10 HP
510-5096 BERKELEY PUMP SEAL KIT 5 & 10 HP
510-5092 BRASS SLEEVE
510-5095 GASKET FOR EXT. BRACKET 5 & 10 HP
130-2010 WASH ARM ASSEMBLY

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
GAUGE PARTS
PART NUMBER DESCRIPTION
509-5153 TEMP CONTROL – DIXELL
509-5151 TEMP CONTROL NTC SENSOR - 15’ LEAD
509-5133 TEMP DISPLAY - RINSE MANIFOLD
509-5134 TEMP DISPLAY NT SENSOR - 10’ LEAD
509-5060 PRESSURE GAUGE - WEISS 2-1/2”
509-5061 WEISS LENS - 2-1/2”
509-5096 GAUGE SNUBBER
RINSE AND FILL SYSTEMS PARTS
PART NUMBER DESCRIPTION
510-5011 RINSE NOZZLE, 1/4" GG10
510-5138 1" SOLENOID VALVE 24V
510-5026 1" PARKER SOLENOID VALVE REPAIR KIT
510-5050 1" PRESSURE REGULATOR
510-5052 1" VACUUM BREAKER
510-5067 1" VACUUM BREAKER REPAIR KIT
510-5053 1" BALL VALVE
514-5057 3/8” X 12’ SPRAY HOSE
519-5043 BRASS SWIVEL
519-5027 SPRAY GUN
MISCELLANEOUS PARTS
PART NUMBER DESCRIPTION
510-5145 1-1/2" NPT BALL VALVE
517-5011 4” CASTERS FOR RACKS
517-5015 DOOR LATCH
517-5018 DOOR LATCH STRIKE
517-5020 INSIDE DOOR HANDLE RELEASE
517-5024 DOOR HINGE
517-5025 LATCH - KASON
517-5026 STRIKE – KASON