FLIGHT TYPE DISHWASHERS

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FLIGHT TYPE DISHWASHERS MODELS STPC STPCW STPCW-D STBUW INSTALLATION & OPERATION MANUAL STERO, A DIVISION OF ILLINOIS TOOL WORKS INC. WWW.STERO.COM For additional information on Stero or to locate an authorized parts and service provider in your area, visit our website at www.stero.com. 3200 LAKEVILLE HWY. PETALUMA, CA 94954 Telephone: 800-762-7600 Fax: 707-762-5036

Transcript of FLIGHT TYPE DISHWASHERS

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FLIGHT TYPEDISHWASHERSMODELS

STPCSTPCWSTPCW-DSTBUW

INSTALLATION &OPERATION MANUAL

STERO, A DIVISION OF ILLINOIS TOOL WORKS INC.WWW.STERO.COM

For additional information on Stero or to locate an authorized parts andservice provider in your area, visit our website at www.stero.com.

3200 LAKEVILLE HWY.PETALUMA, CA 94954

Telephone: 800-762-7600Fax: 707-762-5036

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IMPORTANT FOR YOUR SAFETYONLY QUALIFIED PERSONNEL SHOULD PERFORM THE INITIAL FIELD STARTUPAND ADJUSTMENTS OF THE EQUIPMENT COVERED BY THIS MANUAL.

READ THIS MANUAL THOROUGHLY BEFORE OPERATING, INSTALLING ORPERFORMING MAINTENANCE ON THE EQUIPMENT.

Improper installation, adjustment, alteration, service or maintenancecan cause property damage, injury or death.

Post in a prominent location the instructions to be followed in the event the smellof gas is detected. This information can be obtained from the local gas supplier.

IMPORTANT

IN THE EVENT A GAS ODOR IS DETECTED, SHUT DOWN UNITS AT MAINSHUTOFF VALVE AND CONTACT THE LOCAL GAS COMPANY OR GASSUPPLIER FOR SERVICE.

FOR YOUR SAFETY

Do not store or use gasoline or other flammable vapors or liquids in thevicinity of this or any other appliance.

Shut off the gas before servicing the unit.

All gas joints disturbed during servicing must be checked for leaks.Check with a soap and water solution (bubbles). Do not use an open flame.

Shut off the steam before servicing the unit.

Disconnect the electrical power to the machine and follow Lockout/Tagout procedures. There may be multiple circuits. Be sure all circuits aredisconnected.

Electrical and grounding connections must comply with the applicableportions of the National Electric Code and/or other local electrical codes.

UL73 grounding instructions: This appliance must be connected toa grounded, metal, permanent wiring system; or an equipment-groundingconductor must be run with the circuit conductors and connected to theequipment-grounding terminal or lead on the appliance.

IN THE EVENT OF A POWER FAILURE,DO NOT ATTEMPT TO OPERATE THIS DEVICE.

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TABLE OF CONTENTSIMPORTANT FOR YOUR SAFETY..................................................................................................2GENERAL .........................................................................................................................................5

INTRODUCTION .........................................................................................................................5LOCATION OF DATA PLATE.....................................................................................................5TOOLS ........................................................................................................................................6

Standard ................................................................................................................................6Special ...................................................................................................................................6

PRE-INSTALLATION...................................................................................................................6Utility Connection Requirements ..........................................................................................6

INSTALLATION..................................................................................................................................7CODES AND STANDARDS .......................................................................................................7UNCRATING ................................................................................................................................7ASSEMBLY ..................................................................................................................................7

Load Section Installation .......................................................................................................8Unload Section Installation ...................................................................................................9Leveling ............................................................................................................................... 11Conveyor Peg Belt Installation .......................................................................................... 11Conveyor Peg Belt Tension Adjustment ........................................................................... 13Conveyor Stop Bar Switch Electrical Connection ........................................................... 13Curtain Installation ............................................................................................................. 14

VENTILATION DUCT CONNECTION (if required) ................................................................. 14Gas-Heated Dishwashers ................................................................................................. 14Steam or Electric-Heated Dishwashers ........................................................................... 14Electrical Connections ....................................................................................................... 14

UTILITY CONNECTIONS ......................................................................................................... 15PLUMBING CONNECTIONS ............................................................................................. 15

Water Supply Connections .......................................................................................... 15Drain Connections ....................................................................................................... 15Steam Connections ..................................................................................................... 16

GAS CONNECTIONS ........................................................................................................ 16Gas Lockout/Tagout Procedure .................................................................................. 16

ELECTRICAL CONNECTIONS ......................................................................................... 17Electrical Lockout/Tagout Procedures........................................................................ 17Main Electrical Supply ...................................................................................................17Chemical Supply Connections .................................................................................... 17

ADJUSTMENTS AND TESTS ....................................................................................................... 18PUMP MOTOR CHECK ........................................................................................................... 18CONVEYOR BELT TENSION CHECK ................................................................................... 18V-BELT TENSION ADJUSTMENT .......................................................................................... 18

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OPERATION ................................................................................................................................. 20OPERATING CONTROLS LOCATION................................................................................... 20

Push Button Control Box ................................................................................................... 20LCD Control Box ................................................................................................................ 20

OPERATING CONTROLS FUNCTION................................................................................... 21Push Button Control Box .................................................................................................... 21LCD Control Box ................................................................................................................. 21

RUN CYCLE .............................................................................................................................. 22Push Button Control Box ................................................................................................... 22LCD Control Box ................................................................................................................ 22

SHUTDOWN ............................................................................................................................ 23Daily Shutdown................................................................................................................... 23

MAINTENANCE .............................................................................................................................. 24PARTS REMOVAL ................................................................................................................... 24

Scrapper Spray Manifold Removal .................................................................................... 24Tree-Type Spray Manifold Removal .................................................................................. 24Curtain Removal ................................................................................................................ 25Strainer Pan Removal ....................................................................................................... 25

CLEANING ................................................................................................................................ 26Interior ................................................................................................................................. 26Spray Manifolds (Tree-Type and Scrapper) ..................................................................... 26Curtains .............................................................................................................................. 26Exterior ................................................................................................................................ 26

STAINLESS STEEL CARE...................................................................................................... 27Cleaning .............................................................................................................................. 27Preserving and Restoring .................................................................................................. 27

DELIMING ................................................................................................................................. 27TROUBLESHOOTING ................................................................................................................... 28

LCD DISPLAY MESSAGES..................................................................................................... 28OPERATIONAL TROUBLESHOOTING.................................................................................. 29

PRODUCT SUPPORT AND SERVICE ........................................................................................ 31STERO WARRANTY ..................................................................................................................... 32CALIFORNIA SAFE DRINKING WATER ANDTOXIC ENFORCEMENT ACT OF 1986, (PROP. 65) .................................................................. 33SERVICE AND INSTALLATION INSPECTION REPORT ............................................................. 35

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GENERAL

INTRODUCTION

Every Stero product is built with the highestquality components and innovative featuresthat have established Stero’s reputation asthe food service industry’s warewashingauthority.

Stero Flight-Type dishwasher models includethe standard, STPC, the wide model STPCW,and the STPCW-ER which features a two-stage auxiliary rinse.

Automatic warewashers contain heaters thatmaintain the proper water temperature in thedishwasher tanks. These heaters useelectricity, steam or gas. As a general rule,heaters maintain a tank temperature of 160ºF(71ºC) to ensure sanitation. Hot watersanitizing warewashing machines use abooster heater to raise the incoming, generalpurpose hot water to at least 180ºF (82ºC) forthe final sanitizing rinse.

The NSF requires an established amount ofheat content to ensure sanitation. The waterpressure for this cycle must be 20 PSI.

The dishwasher consists of the followingoperations:• Power Scrapper• Power Wash• Power Rinse or EcoRinseTM

• Final Rinse

LOCATION OF DATA PLATE

The data plate (Figure 1) is located on theMain Electrical Control Box. This data platecontains important information, including thedishwasher model and serial number.

Always have the model and serial numberbefore calling for parts or service.

Figure 1: Data Plate

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TOOLS

Standard• Standard set of hand tools• Gas leak detection equipment (gas-

heated equipment installation only)• Gas pressure Manometer (gas-heated

equipment installation only)

Special• NSF approved silicone sealant• Torx security screwdriver (correctional

facility equipment only)• Pipe joint compound• At least 50 Ft of rope

(conveyor belt installation)• Heavy–duty wire ties or bailing wire

(conveyor belt installation)

• Bubble level

• Floor jack

PRE-INSTALLATION

Utility Connection Requirements

Utility connections must be present and readyfor hook–up to the dishwasher. All utilitysupplies must comply with the electricalinformation labels, with the data plate, andwith all applicable local and national codes.

Electrical leads, water supply line(s), drainline, gas and steam supply and condensatereturn lines (if so equipped) must be present.The water supply must match the pressureand temperature specified on the data plate.The steam or gas supply (if so equipped) mustmatch the pressure and volume specified onthe data plate.

For units using a chemical dispensingsystem, appropr ia te d ispensers orcontainers should be installed and ready forconnection to the dishwasher.

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INSTALLATION

CODES AND STANDARDS

In the United States, the dishwasher must beinstalled in accordance with:

• State and local codes

• National Fuel Gas Code, ANSI-Z83.21,Commercial Dishwashing Machines(latest edition)

• National Fuel Gas Code, ANSI Z223.1(latest edition)

• National Fire Protection Association,NFPA 54 (latest edition)

• Underwriters Laboratories standard UL921, Commercial Dishwashers (latestedition)

• National Electrical Code NEC/NFPA 70(latest edition)

In Canada, the dishwasher must be installedin accordance with:

• Local codes.

• Canadian Electrical Code Part 1 CSAC22.1(latest edition)

• CAN/CSA-C22.2 Number 168,Commercial Dishwashing Machines(latest edition)

• CAN/CSA B149.1, Natural Gas andPropane Installation (latest edition)

UNCRATING

NOTE: As you unpack the equipment, checkthat all components shown on the shippinginvoice are present. Be sure to check forshipping damage. If shipping damage ispresent, contact Stero Customer Service at1-800-762-7600 and provide customer details,machine serial number and the extent ofdamage. Stero will file a freight claim basedon this information.

Unless authorized byStero Customer Service or its authorizedagent, a damaged unit should not beinstalled or operated.

To uncrate the dishwasher, perform the following:

The pallet should not be removeduntil the dishwasher has been moved to itsinstallation area. Damage can occur fromimproper lifting and uneven weight distribution.

Do not attempt to slide the dishwasheron its feet. This can bend the legs.

1. Remove all shipping and packagingmaterial from the machine, includingsupports and wrappings.

2. Leave the pallet in place to allow for easiermovement to the installation location.

3. Check for shipping damage as describedabove.

Exercise care to avoid damagingthe dishwasher or its components.

4. Move the dishwasher to the installationarea and remove the pallet.

ASSEMBLY

If the dishwasher does not require assembly,proceed to the LEVELING procedure.

NOTE: The dishwasher MUST be level forproper operation.

If the dishwasher requires assembly, proceedas follows:

1. When the main section of the dishwasherhas been moved to the installation area, usea bubble level, check that the main section islevel both front to back and left to right.

2. To adjust level, screw the feet in or outuntil the dishwasher is level both front toback and left to right.

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3. Once the main section is level, positionthe load section of the dishwasher nearthe load end of dishwasher main section.

4. Position the unload section near the unloadend of the main dishwasher section.

NOTE: Not all access panel screws arethe same length. Place the screws backinto the holes to aid in correct panelreinstallation and screw placement.

5. Tag and remove all the access panelsfrom the load section of the dishwasherincluding the table and enclosure panels.

6. Tag and remove all the access panelsfrom the unload section of the dishwasherincluding the table and enclosure panels.

7. Tag and remove all the access panelsfrom the main dishwasher section includingthe water line enclosure panels andelectrical junction boxes.

Load Section Installation

To install the load section, proceed as follows:

1. Remove the 5/16" hex head bolts andwashers from the butt joint on the loadside of the main dishwasher section.Retain for reinstallation.

Removebolts and washers,

thenreinstall.

Figure 2: Load End Tank Mount

2. Remove the 3/8" hex bolts, hex nuts, flatwashers and lock washers from the maindishwasher lower frame. Retain forreinstallation.

BoltsWashers

LockwashersNuts

Figure 3: Load End Frame Mount

3. For dishwashers equipped with anextended Vent Cowl, remove the 5/16" hexnut and washer from each side of the ventcowl and retain for reinstallation.

4. Remove the two (2) countersunk screws fromthe main dishwasher load end R/H Belt RollerGuard Extension. Retain for reinstallation.

5. Remove the two (2) countersunk screws fromthe main dishwasher load end L/H Belt RollerGuard Extension. Retain for reinstallation.

Remove4 screws,

thenreinstall.

Dishwasher

Main Section

Vent Cowl

To Dishwasher

Load Section

Figure 4: Load BeltRoller Guard Extension

7. Remove and discard any shipping tape fromthe load end drainpipe fitting and the maindishwasher load end drainpipe connection.

8. Using a Stero and NSF approved siliconesealant; apply a generous amount ofsilicone sealant to the entire Load EndButt Joint Gasket surface.

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9. Check to make sure everything is lined upproperly, then carefully move the loadsection into place with the maindishwasher. Make sure the Roller GuardExtensions and water line(s) are properlyaligned before proceeding.

10. Align the tank bolt mount holes by placinga drift punch into the frame tabs.

11. Install, but DO NOT tighten, the 5/16" hexbolts that were removed in step 6.

12. Apply pipe joint compound and connect,but DO NOT tighten, the drainpipeconnection between the main dishwasherand load end section.

13. Apply pipe joint compound and connect,but DO NOT tighten, the water lineconnection(s) located on the rear side ofthe main dishwasher load end.

14. Reinstall, but DO NOT tighten, the 3/8"frame hex bolts that were removed in step 7.

15. After checking to make sure all plumbingand electrical connections are properlyaligned, tighten all the 5/16" butt joints boltsand 3/8" frame bolts.

16. Once the butt joint bolts and frame boltshave been tightened, tighten all remainingplumbing connections.

17. For dishwashers equipped with an extendedVent Cowl, reinstall the two (2) 5/16" hexnuts and washers removed in step 3.

18. For rear access dishwashers, make surethe Splash Back Panel is properly installedand secured to the load section as illustrated.

InstallSplash Panel

over two (2) pins

Figure 5: Splash Back Panel Installation

19. Reinstall the Roller Guard Extensioncountersunk screws removed in steps 9and 10.

20. Route the wires from the load end remoteSTART/STOP switch through the sealtiteconnection on the junction box mountedon the main dishwasher.

21. Connect the four (4) wire connectors bymatching either the wire colors or the wirenumbers.

22. Connect all supply connections observingNational and local code requirements.

NOTE: Do not reinstall the access panels atthis time.

Unload Section Installation

To install the unload section, proceed as follows:

1. Remove the 5/16" hex head bolts andwashers from the butt joint on the unloadside of the main dishwasher section.Retain for reinstallation.

Removebolts and washers,

thenreinstall.

Figure 6: Unload End Tank Mount

2. Remove the 3/8" hex bolts, hex nuts, flatwashers and lock washers from the maindishwasher lower frame. Retain forreinstallation.

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OPENOPEN

SHUSHU

OPENOPEN

SHUSHU

BoltsWashers

LockwashersNuts

Figure 7: Unload End Frame Mount

3. For dishwashers equipped with an extended Vent Cowl, remove the 5/16" hex nutand washer from each side of the ventcowl. Retain for reinstallation.

4. Remove the two (2) countersunk screwsfrom the main dishwasher unload end R/HBelt Roller Guard Extension. Retain forreinstallation.

5. Remove the two (2) countersunk screwsfrom the main dishwasher unload end L/HBelt Roller Guard Extension. Retain forreinstallation.

Remove4 screws,

thenreinstall.

Dishwasher

Main Section

To Dishwasher

Unload Section

Figure 8: Unload BeltRoller Guard Extension

6. Remove and discard any shipping tape fromthe unload end drainpipe fitting and the maindishwasher unload end drainpipe connection.

7. Using a Stero and NSF approved siliconesealant; apply a generous amount ofsilicone sealant to the entire Unload EndButt Joint Gasket surface.

8. Check to make sure everything is lined upproperly, then carefully move the unloadsection into place with the main dishwasher.Make sure the Roller Guard Extensions andwater line(s) are properly aligned beforeproceeding.

9. Install, but DO NOT tighten, the 5/16" hexbolts that were removed in step 6.

10. Apply pipe joint compound and connect,but DO NOT tighten, the drainpipeconnection between the main dishwasherand unload end sections.

11. Apply pipe joint compound and connect,but DO NOT tighten, the water lineconnection(s).

12. After checking to make sure all plumbingand electrical connections are properlyaligned, tighten all the 5/16" butt jointsbolts and 3/8" frame bolts.

13. Once the butt joint bolts and frame boltshave been tightened, tighten all remainingplumbing connections.

14. Reinstall the Roller Guard Extensioncountersunk screws removed in steps 9and 10.

15. Route the pump motor wires and remoteSTART/STOP switch wires from the maindishwasher section unload end throughthe sealtite connection on the junction boxmounted to the unload section.

16. Connect the wire connectors by matchingeither the wire colors or the wire numbers.

17. For dishwashers equipped with anextended Vent Cowl, reinstall the two (2)5/16" hex nuts and washers removed instep 8.

18. Connect all supply connections observingNational and local code requirements.

NOTE: Do not reinstall the access panels atthis time.

Leveling

For proper operation, the dishwasher must belevel. To level the dishwasher after assembly:

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1. Using a bubble level, check that thedishwasher is level both front to back andleft to right.

2. Screw the feet in or out until the dishwasheris level both front to back and left to right.

Conveyor Peg Belt Installation

NOTE: Whenever possible, two installers shouldbe used to install the Conveyor Peg Belt.

NOTE: The Conveyor Peg Belt weighsbetween 300 lbs. (plastic) and 700 lbs.(stainless steel). Exercise care while handling.

Gloves should be used whilehandling the Conveyor Peg Belt to reduce thepossibility of personal injury.

To install the Conveyor Peg Belt, proceedas follows:

1. Loosen the two (2) Conveyor Motor Mountbolts. This will allow the V-belts to be removedfrom the pulleys and the Unload DriveSprockets will turn freely.

ConveyorMotor

TensionAdjustment

Screw

JamNut

V-BeltPulley

PulleyKey

Motor MountPlate

Conveyor MotorMount Bolts

Figure 9: Conveyor Motor V-BeltTension Adjustment

2. Open or remove all doors to gain accessto the dishwasher during Conveyor PegBelt installation.

3. Place the rolled up Conveyor Peg Belt atthe very end of the load end of thedishwasher.

4. Starting at the load end, thread a piece ofrope through the dishwasher, over the topof the Lower Spray Manifolds and continueto until you reach the Drive End shaft onthe unload end.

5. Thread the rope around the Drive Endshaft and back through the dishwasher.This time thread the rope below the LowerSpray Manifolds until the rope reaches theload section. Exit the rope through the lastload inspection door.

6. Uncoil the Conveyor Peg Belt as much aspossible on the floor, on the load end of thedishwasher. This makes it easier to feedthe belt into the dishwasher.

7. Lay the end of the Conveyor Peg Belt ontothe load section of the dishwasher with thepegs on the belt tilting away from themachine.

Conveyor Belt Direction

Figure 10: Conveyor Belt Direction

8. Fasten the rope to the center of the firstlower belt connecting rod (Figure 11).

9. Station one person on the unload end ofthe dishwasher and one at the load end.The person at the load end will feed theConveyor Peg Belt into the dishwasherwhile the person on the unload end pullsthe rope until the belt reaches the unloadDrive End Shaft.

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UpperTrack Guides

Figure 11: Upper Track Guides

10. Once the belt has reached the unloadDrive End Shaft, place the belt on thesprockets and have the person on the loadsection slowly pull on the rope. This willfeed the belt around the sprockets.

NOTE: Lift up on the Conveyor Peg Belt to makesure the belt rides on all the lower track guideswhile pulling it back through the dishwasher.

LowerTrack Guide

Load EndSprockets

Figure 12: Lower Track Guides

11. Once the Conveyor Peg Belt reaches theLoad End, unfasten the rope, pull the beltup and around the load end Sprockets andtemporarily tie the two ends together witha tie strap or a piece of wire.

12. Now pull the belt and move the temporarytied section to the unload section wherethere is more room to work.

13. Remove the tie strap or piece of wire andthe first lower belt rod.

14. Pull the two pieces of belt together andreassemble the lower rod matching theexisting pattern.

CORRECT INCORRECT

Wire

RollerGuide

Figure 13: Conveyor Peg Belt Assembly

15. Once the rod has been correctly assembled,reinstall the flat washer and cotter pin.

Conveyor Peg Belt Tension Adjustment

NOTE: A properly adjusted Conveyor PegBelt will sag approximately 1" – 1-1/2" betweenthe Lower Track Guides.

There are two (2) adjustable Take-up Bearingsat the load end of the dishwasher. To adjust theConveyor Peg Belt tension, proceed as follows:

1. Adjust the slack in the Conveyor Peg Beltby evenly tightening the Take-up Bearingslocated on both sides of the load section.

2. Measure the distance between the DriveEnd Shaft and the end of the load section oneach side. The distances should be equal toensure the Conveyor Peg Belt runs true.

Take-UpBearings

Adjust tensionto keep both sides

equal distance.

Tape Measures

Measure from theshaft to the end ofthe dishwasher.

Figure 14: Take-up Bearing Adjustment

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3. Once the Conveyor Peg Belt tension hasbeen properly adjusted, reinstall the V-belts on the pulleys and tighten theconveyor Motor mount bolts and tensionadjustment screw.

4. Set the dial for the Conveyor SpeedPotentiometer in the Main Electrical ControlBox to 60.

5. Make sure the Conveyor FOWARD/REVERSE/OFF switch is in theFORWARD position.

Conveyor Stop Bar SwitchElectrical Connection

1. Route the provided electrical lead from theReed Switch to the junction box located onthe main dishwasher unload end.

2. Route the electrical lead through thejunction box.

3. Connect the two (2) electrical connectors.

4. Adjust the Conveyor Stop Bar so that itswings freely.

Route wirethrough here.

Connectelectrical connectors.

Figure 15: Conveyor Stop Bar SwitchElectrical Connection

Curtain Installation

Multi–flap curtains are used throughout thedishwasher to keep moisture inside and reducethe potential of hot water injury. The curtainconfigurations vary by model and size. Refer tothe curtain placement decals located on thefront of the main dishwasher hood for the exactcurtain number and placement. Installationprocedures are the same for all curtains.

1. Starting with the long, middle curtain, reachinside the main dishwasher compartmentand locate the middle curtain rod holder.

2. Place one end of the curtain rod into its holder.

Curtain RodHolder

Figure 16: Curtain Rod Holder

3. Place the other end of the curtain rod intoits holder.

4. Repeat the procedure for remaining curtains.

VENTILATION DUCT CONNECTION(IF REQUIRED)

For units that do not require ventilation ductconnections, proceed to the UTILITYCONNECTIONS section.

Exhaust vent ducts should fit insidethe dishwasher vents but not interfere with theoperation of the dampers.

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Gas-Heated Dishwashers

NOTE: Infrared gas tank heat-equippeddishwashers are supplied with a stainless steelexhaust system, which terminates approximately5.5" above the hood in the rear of the dishwasher.Do not make a sealed connection to the dishwasherexhaust stack. Refer to Figure 17 for gasdishwasher venting installation requirements.

Air Gap

CondensateVenting

Figure 17: Recommended Gas Venting

Steam or Electric-Heated Dishwashers

For all other units requiring ventilation ductconnections, proceed as follows:

1. Check that the ventilation ducts are correctlypositioned above the dishwasher vents.

2. Refer to the Stero Engineering Drawingfor the dishwasher ventilation ductrequirements and size. This drawing islocated in the Main Electrical Control Boxalong with the electrical diagram.

3. Install the venti lation ducts to thedishwasher vents per the dishwasherduct requirements and sizing and per localand state codes.

4. Seal the duct connection joint withsilicone sealant.

Electrical Connections

The exhaust fan is connected to an electricalbox located on the back of the Main ElectricalControl Box, labeled as FAN CONTACTORENCLOSED (Figure 18). Connect the electricalconnections as follows:

8. Remove the two (2) screws securing the FanContactor cover plate. Retain for reinstallation.

9. Remove and discard the 1/2" neoprene,watertite plug from the hole in the top of theFan Contactor box.

10. Install a 1/2" sealtite connector to theexposed hole in the top of the FanContactor box.

11. Route the incoming electrical wires throughthe sealtite connector.

12. Connect the fan electrical wires to thecontactor terminals (Figure 18).

13. Reinstall cover screws removed in step 1.

Available for exhaust fanconnection.

Remove plug and route exhaust fan wires

through here.

Figure 18: Exhaust FanElectrical Connection

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UTILITY CONNECTIONS

PLUMBING CONNECTIONS

Water Supply Connections

Before connecting the watersupply, it must be purged to remove anycontaminates from the line.

NOTE: Ensure that the line strainer is installedso that iron or other metal particles cannotcontaminate the dishwasher.

Refer to the Stero Engineering drawing toconnect the water supply to the dishwasherconnection(s) as indicated by the connectionlabels attached to the connection points.Proceed as follows:

1. Locate the water supply connection(s) aslabeled on the dishwasher.

2. Check the incoming water temperature.

3. Connect the customer-supplied waterline(s) to the appropriate connection(s).

NOTE: The dishwasher requires a pressureof 20 psi at the Final Rinse for correct operation(Figure 19). It may be necessary to increasethe pressure (with a booster pump) ordecrease the pressure (with a pressurereducing valve).

4. Check the incoming water pressure at theFinal Rinse Pressure Gauge.

Pressureshould be

20 psi

0510

152025 30 35 40

45505560

psi kPs

Figure 19: Final Rinse Pressure

Drain Connections

NOTE: Make as many clean outs as possiblein the drain line, using tees with pipe plugs ineach tee instead of elbows, to allow the linesto be cleaned out periodically.

Refer to the Stero Engineering drawing for thedishwasher drain requirements.

NOTE: In some cases, a grease trap must befitted into the waste water line. If a grease trap isrequired for installation, check that it is present.

Install the Waste Drain per local and state codes.

Steam Connections

NOTE: Before connecting the steam supply,it must be purged to remove any contaminatesfrom the line.

Refer to the Stero Engineering drawing toconnect the steam supply and condensatereturn to the dishwasher connection(s)requirements as indicated by the connectionlabels attached to the dishwasher connectionpoints. Proceed as follows:

NOTE: The condensate return should begravity fed to the boiler. A return with anupward slope will require a condensationsump w/pump.

1. Check that the incoming steam pressureis 15-40 psi to meet the dishwasherpressure requirements per the SteroEngineering drawing for the dishwasher.

2. Check that the pipe size is equal to orgreater than the label posted on thedishwasher connection point for properoperation per the Stero engineering drawingfor the dishwasher.

3. Once the correct pressure and volume hasbeen verified, connect the customer-suppliedsteam line(s) to the dishwasher steamconnection(s) as indicated by the labelsattached to the dishwasher’s connection(s).

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GAS CONNECTIONS

Gas Lockout/Tagout Procedure

All gas joints disturbedduring servicing must be checked forleaks. Do not use an open flame. Use ahazardous gas tester or a soap and watersolution (Bubbles indicate a gas leak).

Do not operate a gasfueled appliance if a gas leak is present.

The Lockout/Tagout procedure is used to protectpersonnel working on a gas appliance. Beforeperforming any maintenance or service thatrequires gas disconnections, follow these steps:

1. Locate the gas valve or inlet.

2. Place the valve in the OFF position.

3. Place a tag on the valve indicating thatservice is being performed on equipmentand the gas must remain off until serviceis complete.

4. Place a locking device on the gas valve orinlet, preventing connection until the lockis removed.

5. On the appliance, make sure all flamesources are extinguished and/or removed.

6. Bleed residual gas from the appliance inletline and allow time for the gas to dissipatebefore beginning service on the appliance.

NOTE: Before connecting the gas supply, itmust be purged to remove any contaminatesfrom the line.

Refer to the Stero engineering drawing toconnect the gas supply to the dishwasherconnection(s) as indicated by the labelsattached to the dishwasher’s connection(s)points. Proceed as follows:

1. Check that the pipe size of gas delivered issufficient for proper operation. Refer to thefollowing chart for the dishwasher incominggas pressure requirement.

GAS TYPE REQUIRED W.C.

Natural Gas 3+"

Liquid propane (LP) 8+"

2. Connect the customer-supplied gas lineto the dishwasher gas connection(s).

3. Check the gas line(s) for leaks using asoap and water solution.

ELECTRICAL CONNECTIONS

Electrical connectionsshould be performed only by a certifiedprofessional.

Electrical and groundingconnections must comply with theapplicable portions of the National ElectricCode and/or other local electrical codes.

UL73 groundinginstructions: This appliance must beconnected to a grounded, metal,permanent wiring system; or anequipment-grounding conductor must berun with the circuit conductors andconnected to the equipment-groundingterminal or lead on the appliance.

Disconnect the electricalpower to the machine and follow Lockout/Tagout procedures.

Electrical Lockout/Tagout Procedures

Lockout/Tagout procedures are used toprotect personnel working on an electricalappliance. Perform the following steps beforeperforming any type of maintenance or serviceon an electrically operated appliance.

1. Lockout supply circuit breaker to thedishwasher.

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2. Place a lock or other device on electricalbox cover to prevent someone from placingcircuit breaker ON.

3. Place a tag on electrical box cover toindicate that unit has been disconnectedfor service and power should not berestored unti l tag is removed bymaintenance personnel.

Main Electrical Supply

Refer to the Stero Engineering drawing andwiring diagram located inside the MainElectrical Control Box for the dishwasherelectrical supply requirements.

To connect the main electrical supply, proceedas follows:

1. Perform the Lockout/Tagout procedures.

2. Check that the incoming power leads areof sufficient rating for the dishwashercurrent draw. Amperage and minimumsupply wire specifications are shown onthe decal located in the Main ElectricalControl Box.

3. Using the Stero Engineering drawing andwire diagram for reference, install the powerlines to the incoming distribution terminals.

4. Connect the ground wire to the groundterminal marked GRD.

Ground WireConnection Point

Incoming LineConnection Points

Figure 20: Main Electrical Connection

Chemical Supply Connections

Once the dishwasher has been installed andall utility, electrical, plumbing and ventilationconnections have been made, connect thechemical supply connections to the junctionbox located on the rear of the Main ElectricalControl Box.

Make chemical supplyconnections here.

Figure 21: Chemical Supply Connection

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PUMP MOTOR CHECK

After all electrical connections have been made,check to ensure the pump motor is turning in theproper direction. To check the motor’s direction,perform the following:

1. Close the Drain Valve Foot levers for all thetanks.

2. Turn the main power to the dishwasher ON.

3. On the Main Electrical Control Box, turnthe SAFETY Switch to the ON position.

4. If so equipped, depress the RESET buttonlocated on the Main Electrical Control Box.

5. Press the FILL button to fill the dishwasherwith water.

NOTE: The Conveyor Peg Belt will start fromany START Switch located on the dishwasher.

6. When the dishwasher stops filling withwater, depress the START Switch.

7. Check that the pumps are running in thecorrect direction per the arrow decalsattached to the pumps.

8. Proceed as follows:

a.`If the rotation direction is correct, turnthe SAFETY Switch to the OFF position.

b. If the rotation is reversed:

1 Turn the SAFETY Switch to theOFF position.

2 Per form the ELECTRICALLOCKOUT/TAGOUT procedure.

3 Gain access to the main powerincoming electrical leads in themounted circuit breaker box.

4 Disconnect and reverse any two ofthe incoming power wires on thedistribution block.

5 Secure all electrical connectionsand access panels.

6 Repeat steps 2 through 7 to verifythe pumps are rotating in the correctdirection before proceeding.

CONVEYOR BELT TENSION CHECK

NOTE: Properly adjusted V-belts should slipon the pulleys when a reasonable amount offorce is applied (approximately 100 pounds)against the conveyor peg belts travel.

Check Conveyor Peg Belt tension as follows:

1. While positioned at the load section,CAREFULLY try to stop the belt withboth hands while the Conveyor Peg Beltis in motion.

2. Proceed as follows:

a. If an excessive amount of force isrequired or if the belt would not slipwhen force is applied against theConveyor Peg Belt travel, proceed toV-BELT TENSION ADJUSTMENT.

b. If a minimal amount of force wasrequired or if the belt would not rotateat all, proceed to V-BELT TENSIONADJUSTMENT.

c. If the Conveyor Peg Belt slips when areasonable amount of force is appliedagainst it (approximately 100 lbs), theV-belt tension is properly adjusted.Perform the following:

1 Turn the SAFETY Switch to the OFFposition or press the STOP button.

2 Reinstall the load end access panels,table and enclosure panels removedduring the INSTALLATION section.

3 Reinstall the unload end accesspanels, table and enclosure panelsremoved during the INSTALLATIONsection.

4 Reinstall the main dishwashersection access panels, water lineand enclosure panels removedduring the INSTALLATION section.

ADJUSTMENTS AND TESTS

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V-BELT TENSION ADJUSTMENT

Adjust the tension as follows:

1. Perform the ELECTRICAL LOCKOUT/TAGOUT procedure.

2. Turn the SAFETY Switch to the OFFposition or press the STOP button.

3. Loosen the two (2) Conveyor Motor mountbolts just enough so that the mountingplate will slide back and forth freely.

ConveyorMotor

TensionAdjustment

Screw

JamNut

V-BeltPulley

PulleyKey

Motor MountPlate

Conveyor MotorMount Bolts

Figure 22: Conveyor Motor V-BeltTension Adjustment

4. Loosen the tension adjustment jam nut andturn the threaded tension adjustment screwin or out until the belt is properly tensioned.

5. Perform the CONVEYOR BELT TENSIONCHECK steps 1-5.

6. When the Conveyor Peg Belt tension hasbeen properly adjusted perform the following:

a. Tighten the Conveyor Motor mount bolts.

b. Tighten the Tension Adjustment jamnut until it contacts the Conveyor Motormount plate.

c. Turn the SAFETY Switch to the OFFposition or press the STOP button.

d. Reinstall the load end access panels,table and enclosure panels removedduring the INSTALLATION section.

e. Reinstall the unload end access panels,table and enclosure panels removedduring the INSTALLATION section.

f. Reinstall the main dishwasher sectionaccess panels, water l ine andenclosure panels removed during theINSTALLATION section.

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OPERATING CONTROLS LOCATION

The operating controls for the dishwasherare located in a stainless steel Main ElectricalControl Panel, which is mounted on top of thedishwasher. Stero offers two different typesof dishwasher controls. The two types ofcontrols are:

• Push Button Control Box

• LCD Control Box

Push Button Control Box

RESET SAFETYOFF ON

FILL TANK HEAT START STOP

Figure 23: Operating Controls Location

• SAFETY Switch• FILL Button• HEAT Button• START Button• STOP Button• Optional BOOSTER HEAT Button• Optional RESET Button

LCD Control Box

The LCD Control Panel consists of thefollowing controls, which are explained in theOPERATING CONTROLS FUNCTION sectionof this manual:

• Power ON/OFF switch• LCD Display screen

• START button• STOP button• FILL button• HEAT button• ALARM MUTE button• BOOSTER HEAT button

Figure 24: LCD PanelOperating Controls Location

Also located on top of the dishwasher are thetemperature gauges. When the pumps arerunning, the temperature gauges give a visualindication of the actual water temperatureswithin each section of the dishwasher. Thegauges are clearly labeled and, depending onmodel and type, are for the following sections:

• Scrap Tank Water Temperature• Wash Tank Water Temperature• Rinse Tank Water Temperature• Final Rinse Water Temperature• Auxiliary Rinse Water Temperature

Temperature Gauges

Figure 25: Temperature Gauge location

OPERATION

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OPERATING CONTROLS FUNCTION

Push Button Control Box

SAFETY SwitchThe SAFETY Switch energizes thedishwasher electrical circuit when placed ON.The SAFETY Switch is located on the MainElectrical Control Box.

FILL Button The FILL button energizes the Fill valves to fill thetanks with water. The FILL button is located on theMain Electrical Control Box.

HEAT ButtonThe HEAT button energizes the dishwasherheating circuit. The HEAT button is illuminatedwhen the tank heat is turned on and the tanksare full. The HEAT button is located on theMain Electrical Control Box.

START ButtonThe START button energizes the electricalpumps and Conveyor Peg Belt. The STARTbutton is located on the Main ElectricalControl Box.

STOP ButtonThe STOP button stops the conveyor belt andpumps. The STOP button is located on the MainElectrical Control Box.

BOOSTER HEAT ButtonThe BOOSTER HEAT button is only presenton units pre-wired with a Stero steamBooster Heater. The BOOSTER HEATbutton energizes the Booster Heater controlcircuit. The BOOSTER HEAT button if pre-wired by Stero will be located on the MainElectrical Control Box.

RESET ButtonThe RESET button is only present on gas-heated dishwashers. The RESET button resetsthe electrical control circuit in the event of apower outage or interruption. The RESET buttonis located on the Main Electrical Control Box.

LCD Control Box

Power ON/OFF SwitchThe Power ON/OFF switch turns the ControlModule ON and OFF. The Power ON/OFF switchis located on the front of the dishwasher abovethe doors and near the Control Panel Keypad.

LCD Display ScreenThe LCD Display screen displays the currentstatus or Fault Condition Code for thedishwasher. The LCD Display screen is locatedon the top section of the Control Panel Keypad.

START ButtonThe START button energizes the dishwasherRUN cycle. The START button is located onthe Control Panel Keypad.

STOP ButtonThe STOP button stops the conveyor and thepumps. The STOP button is located on theControl Panel Keypad.

FILL ButtonThe FILL button energizes the Fill valves to fillthe tanks with water. The FILL button is locatedon the Control Panel Keypad.

HEAT ButtonThe HEAT button energizes the dishwasherheating circuit. The HEAT button is located onthe Control Panel Keypad.

ALARM MUTE ButtonThe ALARM MUTE button silences the audiblealarm when a fault condition occurs. TheALARM MUTE button is located on the ControlPanel Keypad.

BOOSTER HEAT ButtonThe BOOSTER HEAT button is only operationalfor dishwashers with an optional BoosterHeater installed. The BOOSTER HEAT buttonenergizes the Booster control circuit. TheBOOSTER HEAT button is located on theControl Panel Keypad.

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RUN CYCLE

Push Button Control Box

To complete a run cycle for a dishwasherequipped with push button controls, performthe following.

Water temperature insidethe dishwasher can reach 190°F andcause severe burns.

1. Turn the Drain Valve Foot lever(s) for alltanks to the SHUT position.

2. Ensure all curtains are properly installed.

3. Ensure all Strainer Pans are properlyinstalled.

4. Ensure all Spray Manifolds are properlyinstalled and that the end caps are tight.

5. Close all of the doors to the dishwasher. Thedoors have a safety switch that will preventthe dishwasher from running with doorsopen.

6. Turn the main power supply to thedishwasher ON.

7. If the dishwasher is gas-heated, depressthe RESET button.

8. Turn the SAFETY Switch to the ON position.

9. Push the FILL button. The FILL button willilluminate until the tanks fill to the proper level(between 1" and 2" below the Overflow.)

10. Push the HEAT button. The HEAT buttonwill illuminate to indicate the heatingcircuit is energized. Allow the tanks toheat to the proper operating temperature(approx. 15-30 minutes).

11. For dishwashers equipped with an optionalsteam Booster Heater, push theBOOSTER HEAT button. The BoosterHeater will begin to heat.

12. Push the START button located on theMain Electrical Control Box. This will startthe dishwasher wash pumps and theConveyor Peg Belt.

NOTE: The pumps and Conveyor Peg Belt willstart from any START switch located on thedishwasher. When the dish rack trips the FinalRinse Rake, the Shutdown Timer will reset.

13. Place soiled ware on the Conveyor Peg Belt.The ware will convey through the dishwasher.The Conveyor Peg Belt will stop when theware reaches the Conveyor Stop Bar Switchor when the Shutdown Timers time expires.

14. To restart the conveyor, remove the cleanware from the Conveyor Peg Belt. The beltwill restart automatically.

LCD Control Box

To complete a RUN cycle for a dishwasherequipped with an LCD Control Box, performthe following.

Water temperature insidethe dishwasher can reach 190ºF and causesevere burns.

1. Turn the Drain Valve Foot lever(s) for alltanks to the SHUT position.

2. Make sure all Strainer Pans are clean andsecured in place.

3. Make sure all Upper and Lower SprayManifolds are securely in place and all endcaps are tight.

4. Make sure all curtains are clean andsecurely in place.

5. Close all of the doors to the dishwasher.The doors have a safety switch that willprevent the dishwasher from running withdoors open.

6. If the dishwasher is gas-heated, depressthe RESET button.

7. Turn the Power Switch to the ON positionThe Control Panel Keypad LCD will displayINITIALIZING for 30 seconds.

8. When the Control Panel Keypad LCDdisplays HOT WATER SANITIZER, pressthe FILL button located on the ControlPanel Keypad.

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9. When the Control Panel Keypad LCDdisplays READY, press the HEAT buttonlocated on the Control Panel Keypad.

NOTE: The BOOSTER HEAT button is onlyoperational for dishwashers equipped with anoptional Booster Heater.

10. If equipped, press the optional BOOSTERHEAT button located on the Control PanelKeypad. This will preheat the water in theBooster Tank for approximately 10 minutesor until operating temperatures have beenreached.

11. Press the START button located on theControl Panel Keypad to start the washcycle.

NOTE: Final rinse temperature and flowpressure gauges are accurate only when arack enters the final rinse area and water isflowing. Acceptable temperature range is180ºF-195ºF and pressure should be 20 psi.

NOTE: Wash dishes in batches to conserveenergy, water and soap.

NOTE: A Conveyor Stop Bar Switch mountedon the unload section will stop the belt andprevent a jam. Remove dish racks before theyreach and open the Conveyor Stop Bar Switch.

12. At the end of the shift, turn the PowerSwitch located on the Control PanelKeypad to the OFF position.

13. Turn the Drain Valve Foot levers to OPENfor all the tanks to drain the dishwasher.

14. Refer to the CLEANING section of theInstallation and Operation manual forcleaning procedures.

SHUTDOWN

Daily Shutdown

At the end of each shift or washing period, thefollowing steps will ensure proper results fromyour Stero dishwasher.

1. Shut off all power to the dishwasher, placethe SAFETY Switch to the OFF position orturn the power switch to the OFF position.

2. Turn the Drain Valve Foot Lever(s) for alltanks to the OPEN position.

3. Open all the doors.

4. If applicable, perform the SCRAPPERSPRAY MANIFOLD REMOVAL procedure.

5. Perform the TREE-TYPE SPRAYMANIFOLD REMOVAL Procedure.

6. Perform the CURTAIN REMOVAL Procedure.

7. Perform the STRAINER PAN REMOVALProcedure.

NOTE: The Spray Manifolds, Strainer Pansand Curtains should be taken to a sink andcleaned as per the procedures in theCLEANING section.

8. Perform the dishwasher Interior CleaningProcedure.

9. Perform the Exterior Cleaning Procedure.

10. Install the Spray Manifolds, reversing theTree-Type Spray Manifold RemovalProcedure.

11. Install the Strainer Pans, reversing theStrainer Pans Removal Procedure.

12. Install the Curtains, reversing the CurtainRemoval Procedure.

13. Leave all doors open to allow the interior ofthe dishwasher to air dry.

14. Turn the circuit breakers to OFF.

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PARTS REMOVAL

Scrapper Spray Manifold Removal

1. Perform the DAILY SHUTDOWNProcedure on page 23, steps 1 through 3.

2. Locate the Mounting Clamp Handle or HandGrip Clamp located at the front of theScrapper Spray Manifold.

Upper ManifoldMount Clamp

Lower ManifoldMount Clamp

Figure 26: Scrapper Spray ManifoldMount Clamp

Lower ManifoldHand Grip Clamp

Upper ManifoldHand Grip Clamp

Figure 27: Scrapper Spray ManifoldHand Grip Clamp

3. While holding onto the Scrapper SprayManifold either:

a. Rotate the mounting clamp handlecounterclockwise to release theScrapper Spray Manifold (Figure 26).

b. Unscrew the Manifold Hand Grip Clampto loosen the Scrapper Spray Manifold(Figure 27).

4. Slide the Scrapper Spray Manifoldassembly toward the front of thedishwasher to disengage it from the rearwater line connection.

5. Carefully pull the Scrapper Spray Manifoldout of the dishwasher.

6. Repeat the procedure for the LowerScrapper Spray Manifold assembly.

7. Refer to CLEANING section for proceduresto clean the Scrapper Spray Manifolds.

8. When the Scrapper Spray Manifold hasbeen cleaned, install by reversing theabove steps.

Tree-Type Spray Manifold Removal

1. Perform the DAILY SHUTDOWNProcedure on page 23, steps 1 through 3.

2. Locate the Mounting Clamp Handle or HandGrip Clamp located at the front of theSpray Manifold.

Tree-Type Spray ManifoldMount Clamp

Figure28: Tree-Type Spray ManifoldMounting Clamp Handle

MAINTENANCE

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Tree-Type Spray ManifoldHand Grip Clamp

Figure 29: Tree-Type Spray ManifoldHand Grip Clamp

3. While holding onto the Spray Manifold either:

a. Rotate the Mounting Clamp handlecounterclockwise to release the SprayManifold (Figure 28).

b. Unscrew the Manifold Hand Grip clampto loosen the Spray Manifold (Figure 29).

4. Slide the Spray Manifold assembly towardthe front of the dishwasher to disengage itfrom the rear water line connection.

5. Carefully pull the Spray Manifold out ofthe dishwasher.

6. Repeat the procedure for the remainingSpray Manifold assemblies.

7. Refer to the CLEANING section forprocedures to clean the Spray Manifolds.

8. When the Spray Manifolds have beencleaned, install by reversing the above steps.

Curtain Removal

Curtain configurations vary depending onmodel. Refer to the curtain placement decalsfor correct curtain placement. Removalprocedures are the same for all curtains.

1. Perform the DAILY SHUTDOWNProcedure on page 23, steps 1 through 5.

2. Reach inside to locate the top of the curtainrod end.

3. Lift one end of the curtain rod up and out ofits holder.

4. Locate the other end of the curtain rod andlift it out of its holder.

5. Carefully remove the rod and curtain fromthe washer.

CurtainPlacement Decals

Curtain Rod

Figure 30: Curtain Removal

6. Repeat this process until all curtains androds have been removed.

7. Refer to the CLEANING section for curtaincleaning procedures.

8. To install the curtains, reverse above steps.

Strainer Pan Removal

NOTE: The interior of the dishwasher shouldbe cleaned before removing the Strainer Pans.

1. Perform the TREE-TYPE SPRAYMANIFOLD REMOVAL procedure toremove the Lower Spray Manifolds.

The Strainer Pans are set atop thewash and the rinse tanks. Do not allow thecollected material to spill from the StrainerPans into the water tanks.

NOTE: The Stra iner Pans for theScrapper Tank are installed with theperforated side up to allow the food soilto wash into the outboard scrap basket.The wash and rinse Strainer Pans areinstalled with their perforated sidesdown to collect the food soil.2. Remove the loose soil from all the tank

Strainer Pans.

3. Carefully lift and remove all the StrainerPans from the dishwasher.

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4. The Strainer Pans should be thoroughlycleaned in a sink before reinstalling backinto the dishwasher.

5. To install the Strainer Pans, reverse theabove steps.

Strainer Pan

Figure 31: Strainer Pans Removal

CLEANING

Never use any metal tools.Scrapers, files, wire brushes or scouring pads(except for stainless steel scouring pads), willmar the surface!

Never use steel wool, which willleave behind particles that can rust!

Never use acid–based or chloride–containing cleaning solutions, which will breakdown the protective film!

Never rub in a circular motion!

Never leave any food products orsalt on the surface. Many foods are acidic.Salt contains chloride!

Interior

This procedure should be performed based ona schedule pre-determined for your operation.

1. Perform the DAILY SHUTDOWNProcedure steps 1 through 8.

2. Wash the interior compartment of thedishwasher with a solution of milddetergent and warm water.

3. Remove any food particles that might remainbetween the drain valve and the seat.

4. Rinse the interior of the dishwasher withwarm water and flush food soil through thefloor drains.

5. Leave the doors open and allow the interiorto air dry.

Spray Manifolds (Tree-Type and Scrapper)

All the Spray Manifold assemblies should bethoroughly cleaned before reinstalling in thedishwasher. To clean the Spray Manifolds,perform the following:

1. Perform the DAILY SHUTDOWNProcedure steps 1 through 7.

2. Take the Spray Manifolds to a sink andthoroughly wash them with a solution ofmild detergent and warm water.

3. Clean out the Spray Manifold spray nozzleswith a paper clip to remove any collectedfood particles.

4. Rinse the Spray Manifolds thoroughly.

Curtains

It is essential that the dishwasher curtains becleaned daily. To clean the dishwashercurtains, perform the following:

1. Perform the DAILY SHUTDOWNProcedure steps 1 through 6.

2. Take all the curtains and rods to a sink.

3. Thoroughly clean the curtain flaps with asolution of mild detergent and warm water.

4. Clean between the curtain flaps with afiber bristled brush.

5. Thoroughly rinse the curtains.

6. Allow the curtains to air-dry before installinginto the dishwasher.

Exterior

Clean the floor area around and underneath thedishwasher to prevent soil accumulation.

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STAINLESS STEEL CARE

Cleaning

Stainless steel contains 70–80% iron, whichwill rust if not properly maintained. It alsocontains 12–30% chromium, which forms aninvisible passive, protective film that shieldsagainst corrosion. If the film remains intact,the stainless steel will remain intact. However,if the film is damaged, the stainless steel canbreak down and rust. To prevent stainlesssteel breakdown, follow these steps:

Never use any metal tools.Scrapers, files, wire brushes or scouring pads(except for stainless steel scouring pads), willmar the surface!

Never use steel wool, which willleave behind particles that can rust!

Never use acid–based or chloride–containing cleaning solutions, which will breakdown the protective film!

Never rub in a circular motion!

Never leave any food products orsalt on the surface. Many foods are acidic.Salt contains chloride!

For routine cleaning, use warm water, mildsoap or detergent and a sponge or soft cloth.

For heavy–duty cleaning, use warm water, adegreaser and a plastic, stainless steel orScotch–Brite pad.

Always rinse thoroughly. Always rub gently inthe direction of the steel grain.

Preserving and Restoring

Special stainless steel polishing cleaners canpreserve and restore the protective film.

Preserve the life of stainless steel with a regularapplication of a high quality stainless steelpolishing cleaner as a final step to daily cleaning.

If signs of breakdown appear, restore thestainless steel surface. First, thoroughly clean,rinse and dry the surface. Then, on a daily basis,apply a high–quality stainless steel polishaccording to manufacturer’s instructions.

DELIMING

Contact your Chemical Supplier for Delimingchemicals and procedures.

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TROUBLESHOOTINGLCD DISPLAY MESSAGES

The Control Panel Keypad LCD (Figure 24) displays operational and fault information needed toRUN the dishwasher. The following table lists the display message text, when the displaymessages occur, what each display message means and how to correct a fault, if needed.

DISPLAYMESSAGE

INITIALIZING

HOT WATERSANITIZER

READY

RUN CYCLE

DOOR OPEN

CLEARTABLE LIMITSWITCH

NO HEAT/RESETTHERMOSTAT

WHEN THEDISPLAY OCCURS

During the first 30seconds after thePower Switch isturned ONBefore the Filloperation iscompleted

After the Fill operationis completed

When the wash cycleis started

When a door is open

When the ConveyorStop Bar Switch isclosed due to abackup of cleandishesWhen the High–Temperature LimitCutoff switch isopened and an alarmbuzzer is sounding.NOTE: To turn thealarm buzzer OFFbefore the alarmcondition is removed,press the ALARMMUTE button on thekeypad

OPERATING OR FAULTCONDITION

Normal operation whilesystem is initializing.

Normal operation starts30 seconds after thePower Switch is pressedON.Normal operationindicates all of the tanksare full.Normal operationindicates the dishwasheris washing dishes.Indicates the door is openand needs to be closedfor normal operation toresume.Indicates clean dish racksneed to be removed fromthe unload section.

Indicates the internaltemperature hasexceeded the high limit.

CORRECTIVEACTION

Normal operation Nonerequired.

Normal operation Nonerequired.

Normal operation Nonerequired.

Normal operation Nonerequired.

Close the dishwasher door.

Remove dish racks from theunload section. The ConveyorStop Bar Switch will resetwhen racks are removed.

Turn the SAFETY Switch tothe OFF position. Reset thetripped High Limit CutoffSwitch by pressing the redred reset button located onthe tank thermostat in.

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REMEDY

Remove and clean the Spray Manifolds perthe CLEANING section of this manual.Check that the Conveyor Stop Bar is inthe down position.

Close the circuit breaker(s).

Close the drain valve.

Remove and clean the Spray Manifolds perthe CLEANING section of this manual.

Contact your detergent provider.

Wait for the water level to refill.

Shut down the dishwasher and call your localfactory-authorized Stero service professional.

OPERATIONAL TROUBLESHOOTING

The following table lists common operator permitted troubleshooting remedies. If the remedy doesnot correct the symptom, shut down the dishwasher and contact your local factory-authorizedStero service professional.

SYMPTOM

Pump motor starts thenstops.Conveyor will notoperate.

Dishwasher runs fora few seconds thenshuts off.Dishwasher is notwashing properly.

Dishwasher is notrinsing properly.

POSSIBLE CAUSE

Spray Manifolds areclogged.Conveyor Stop Bar is notin the correct position.

Circuit breaker(s) areopen.Drain valve is open.

The Spray Manifoldsare plugged.

Detergent containeris empty.

Low water level indishwasher tank.Final rinse sprayers areplugged.

DISPLAYMESSAGE

LOW WATERLEVEL

WHEN THEDISPLAY OCCURS

When one or bothwater level switchesare opened

OPERATING OR FAULTCONDITION

Indicates the water level inthe wash or rinse tankshas dropped below theoperating level for morethan five seconds.

CORRECTIVEACTION

Drain and refill the tanks.

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SYMPTOM

Dishwasher will notcome up to temperature.(ELECTRIC TANK HEAT)Dishwasher will notcome up to temperature.(STEAM TANK HEAT)

Final rinse will not comeup to temperature.(STEAM BOOSTER)

Dishwasher will not fill.

Dishwasher will nothold water.Dishwasher overfills.

Dishwasherwill not start.

POSSIBLE CAUSE

Circuit breaker is tripped.

HEAT switch is OFF.Steam supply valveis closed.

Steam return valveis closed.Steam supply valveis closed.

Steam return valveis closed.Water supply valveis closed.

Open drain valve.

Food particles in thedrain valve

Control circuit breakeris tripped.

SAFETY switch is inthe OFF position.

Low water level inthe tanks

Drain valve is open.

REMEDY

Reset circuit breaker.

Turn HEAT switch to ON.Open the steam supply valve.

Open the steam return valve.

Open the steam supply valve.

Open the steam return valve.

Open the water supply valve.

Check drain for food particles, misalignedor broken o-ring gasket.Check and remove food particles fromdrain valve seat.Contact your local factory authorized Steroservice professional.Reset control circuit breaker.

Turn SAFETY switch to the ON position.

Check the water level in the tanks.Water should be 1/2" below the overflow.

Check valve for food particles, misalignedor broken o-ring gasket.

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PRODUCT SUPPORT AND SERVICETo obtain service and parts information concerning this model, contact the Stero authorizedservice provider in your area (refer to our website, www.stero.com, for a complete listingof authorized service and parts locations).

When calling for service, the following information must be available:

• Model Number: ___________________

• Serial Number: ____________________

• Voltage: __________________________

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STERO WARRANTYThis warranty is in lieu of all other warranties,expressed or implied, including withoutl imitat ion any implied warranty ofmerchantability, fitness for a particular purposeor non–infringement, and of any otherobligation or liability on the part of Stero, whetherin contract, strict liability, tort or otherwise.

The Stero Company warrants this equipmentto be free from defects in material andworkmanship, under normal use and operation,for a period of one (1) year from the date ofinitial start up or eighteen (18) months fromthe date of shipment from the factory,whichever comes first. This warranty isconditioned upon the customer’s maintenanceand care as outlined in the service manualand upon return of the warranty registrationcard. Repairs will be performed during Stero’sauthorized service agency’s normal businesshours. If the customer requires after hoursservice, the customer will be responsible forthe overtime premium.

Machine is warranted only for the initial placeof instal lat ion. Removal of machineautomatically terminates the warranty. Steroshall have no liability under this warranty unlessthe customer promptly notifies Stero or itsfactory authorized service agent of any allegeddefects. All defective parts become theproperty of Stero and must be returned toStero, or its agent, at Stero’s expense, withinthirty (30) days from the date of the part’sreplacement. Parts replaced within thewarranty carry only the unexpired portion of

the machine’s warranty. Not covered by thiswarranty are changes (parts and/or labor)necessitated by or damage resulting from:water condit ions, accident, alteration,improper use, abuse, tampering, improperinstallation, or failure to follow operating andmaintenance procedures. Examples of theforegoing, but without limitations are: (1)Damage to the machine resulting fromexcessive concentrations of chlorine or de–liming acid solutions; (2) Use with utility serviceother than designated on the rating plates; (3)Improper connection to utility service; (4)Inadequate or excessive water and/or steampressure; (5) Leaks caused by faultyinstallation; (6) Component failures causedby water leaks due to faulty installation; (7)Failure to comply to local building codes; (8)Failures due to deposits resulting from wateror steam conditions, detergents, chemicals,or improper cleaning; (9) Resetting breakers,overloads, or safety thermostats; (10)Adjustments of thermostats after 90 days ofoperation; (11) Improper opening of utilitysupply valves; (12) Cleaning drain valves, linestrainers, rinse nozzles, etc.; (13) Improperinstallation or malfunction of chemicaldispensing equipment supplied by others; and(14) Failure to provide regular maintenanceand daily cleaning as outlined in the servicemanual. In no event will Stero be liable for lossor damage to or loss of use of facilities orother property, additional labor costs, loss ofrevenue, loss of anticipated profits, or otherdamages of any kind what–so–ever, whetherdirect, indirect, incidental or consequential.

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The State of California enacted the CaliforniaSafe Drinking Water and Toxic EnforcementAct of 1986, (Prop. 65), which "prohibits anyperson in the course of doing business fromknowingly and intentionally exposing anyindividual to a chemical known to the State ofCalifornia to cause cancer or reproductivetoxicity without first giving clear and reasonablewarning to such individuals." The Governor’sScientific Advisory Panel added carbonmonoxide to the list of hazardous chemicalsknown to cause reproductive harm.

In order to establish full compliance withProposition 65, an orange warning label hasbeen attached to each gas-f ired unitmanufactured by Stero.

Carbon monoxide would not be present inconcentrations that would pose a "significantrisk" to the consumer when the equipment isinstalled, operated and maintained as follows:

1. Installed in accordance with all local codes,or in the absence of local codes, with thecurrent National Fuel Gas Code ANSIZ223.1 Latest Addenda.

2. Installed under a properly designed andoperating exhaust hood.

3. Connected to the type of gas for which theunit is equipped.

4. Proper appliance pressure regulatorinstalled on the gas supply line andadjusted for the manifold pressure markedon the rating plate.

5. Adequate air supply to the unit.

6. The equipment is operated in the mannerintended and using the proper utensil forthat type of appliance.

7. Keep the equipment clean and have itchecked periodically.

8. Burner air adjustments, mechanicalmaintenance and repairs must beperformed by qualified service personnel.

If the equipment is not installed, operated andmaintained in accordance with the aboverequirements, concentrations of carbonmonoxide in excess of the established limitscould be present in the kitchen environment.

If not installed, operated and maintained in accordance with themanufacturer’s instructions, this product could expose you to fuel or fuel combustionsubstances, which can cause death or serious illness and which are known to the State ofCalifornia to cause cancer, birth defects or other reproductive harm.

ALL PERSONNEL IN THE WORKPLACE WHO MAY BE SUBJECT TO ANYEXPOSURE OF CARBON MONOXIDE MUST BE WARNED OF SUCH POSSIBLEEXPOSURE. THIS WARNING SHOULD BE CONVEYED IN A MANNER SO THATIT IS CLEARLY UNDERSTOOD BY THE EMPLOYEE. THE EMPLOYEE MUSTBE ASKED IF IN FACT HE OR SHE UNDERSTANDS THE CORRECT METHODOF OPERATION OF THE EQUIPMENT AND THAT A RISK OF EXPOSUREEXISTS IF THE EQUIPMENT IS OPERATED IMPROPERLY.

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STERO, A DIVISION OF ILLINOIS TOOL WORKS INC.WWW.STERO.COM

3200 LAKEVILLE HWY.PETALUMA, CA 94954

Telephone: 800-762-7600Fax: 707-762-5036

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New Equipment Performance and Installation Inspection Report

Date:

Customer Information

Location Contact Name

Address City State

Phone Fax Zip

Service Agency Information

Company Technician Name

City State PhoneZip

Equipment Information

Model Serial Number

Date of Installation

All new Stero Dishwashing Machines are warranted against defects in workmanship and materials for a period of one year from date of start-up by the original owner. Warranty card MUST be filled out and RETURNED to the manufacturer within 10 days from the date of delivery to the original owner. Warranty does not apply to any dishwasher which has been subject to accident, alteration, misuse or damages resulting from incorrect installation on the part of the contractor.

Any repair work performed on the above dishmachine by persons other than Authorized Stero Service Agencies is the sole responsibility of the customer.

The above machine has been inspected and demonstrated in the presence of the customer by a representative authorized by Stero.

Stero Representative Signature Customer Signature

Installation Checklist

Machine leveledN/A OK

Voltage/Phase correct V Ph

Circuit breaker(s) sized correctly A

Water supply temperature meets min. requirements F

Water pressure meets min. requirements PSI

Plumbing checked for leaks

Fill/Drain lines plumbed correctly

Spray Manifolds in place and secure

Strainer Pans in place

Curtains in proper place

Wash Temperature F

RinseTemperature

Dampers adjusted/working properly

Demonstration Checklist (To be completed by Stero Representative)

OKN/ASoap dispenser installed

Motor rotation is correct

Water Temperatures

Scrapper Temperature

Auxiliary Rinse Temperature

Final Rinse Temperature

F

F

F

F

Booster Heater Information N/A

Manufacturer Model

Serial No.

PhV

Type of Heat

Customer Service Agent

Rinse Injector installed

OKN/ADemonstrated RUN cycle

Demonstrated Shutdown procedures

Warranty policy explained

Cleaning procedures explained

Parts manual included

Steam-Heated SWB Gas-Heated WC

PhV

Normal maintenance procedures demonstrated

N/A

Conveyor Belt Tension adjusted properly

Steam Condensate/Return line routed correctly

Cut

Her

e

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