Hobart C44A ML-104047 User's Manual
Contents
1. W C Water Column Type of BTU Hr Incoming Gas Line Size Incoming Line Pressure Manifold alin GEAR 78 000 1 2 NPT 3 5 WC 3 2 WC Families 78 000 1 2 NPT 9 0 W C 11 W C 8 2 W C 94 000 3 4 NPT 3 5 WC 3 2 WC C64A Family 94 000 3 4 90 WC 11 WC 8 4 WC 156 000 3 4 3 5 WC 3 2 WC C88A Family 156 000 3 4 9 0 W C 11 WC 82 WC NOTE DO NOT use Teflon tape on gas line pipe threads For gas line pipe connections use Loctite 565 Hobart part number 546292 ora flexible sealant suitable for use with Natural and Propane Gases The appliance and its gas connections must be leak tested before placing the appliance in operation Use soapy water for leak test DO NOT use open flame The installation must conform with local codes or in the absence of local codes with the National Fuel Gas Code ANSI 2223 1 latest edition Copies may be obtained from the American Gas Association Inc 1515 Wilson Blvd Arlington VA 22209 The appliance and its individual shutoff valve must be disconnected from the gas supply piping system during any pressure testing of that system at test pressures in excess of gt psig 3 45 kPa The appliance must be isolated from the gas supply piping system by closing its individual manual shutoff valve during any pressure testing of the gas supply piping system at test pressures equal to or less than gt psig 3 45 kPa Dissipate test pressure2. and gas tank heat and for built in booster if provided If overheating should occur the heat supply will be turned off Turn the Power switch OFF and contact your local Hobart service office Thermometers Dial thermometers for wash and final rinse are indicated in F and C on the faceplate Door Interlocks Door interlock switches will prevent machine operation while an inspection door is open If a door is opened while the machine is operating the pumps and conveyor will automatically turn off After the door is closed the machine must be restarted by pushing the Motor switch ON Wash and Rinse Arms Upper and lower prewash wash and final rinse arms are removable RS Unit and CS Unit CRS66A CRS66AW CRS76A CRS86A CRS110A CCS66A CCS66AW CCS76A CCS86A and CCS110A The 22 Recirculating Scrapper is a power prewash unit which uses overflow wash water hence no fill valve is required PW Unit CPW80A CPW80AW CPW90A CPW100A and CPW124A The 36 prewash unit is a large power prewash unit which uses overflow wash water hence no fill valve is required Auto Fill Close door s and push the Power switch ON After a 5 second delay the machine fills automatically Auto Timer The Auto Timer switch is located on the left side of the control box Designed to save electrical power it is adjusted to shut off pump and drive motors a set amount of time after the last rack exits the dishwasher To restart slide a rack into
3. compensate for the vapors produced The local authority has final jurisdiction over this matter Venting can be provided by either the pant leg duct connections Fig 8 or by a vent hood over the whole machine Fig 6 The Hobart C Line dishwasher equipped for gas tank heat is not provided with a flue collar and is not intended to have the flue directly connected to a ventilation system However the products of combustion must be vented to the outside air A vent hood over the entire dishwasher Fig 6 can be employed to vent both the moist air from the dishwashing chamber and the flue gases from the gas heater The volume of flue exhaust required for venting moist air and flue gases using a single vent hood over the entire dishwasher must be calculated using the formula in the Perimeter Calculation Formula on page 16 Type or Type Il canopy hoods are recommended A factory built commercial exhaust hood may be listed as conforming to Underwriters Laboratory s standard 710 titled Exhaust Hoods for Commercial Cooking Equipment Hoods must be installed according to the manufacturer s instructions Makeup air must be provided so that the exhaust flow rate results in a positive building pressure in the room where the unit is located more outside air than exhaust air Factory built hoods not tested to UL standard 710 and custom built hoods must comply with the following specifications Stainless steel 0 037 No 20 Gage minimum thickness or copper
4. dishes one on top of another as water must have free access to both sides of every dish Stand plates and dishes up edgewise as shown in Fig 13 Cups glasses and bowls should be inverted in open type or compartment type rack as shown in Fig 13 Silverware and other small pieces may be scattered loosely over the bottom of a flat bottom rack Do not allow foreign objects to enter the unit especially metallic contaminants J Fig 13 When one rack has been loaded slide it into the machine and start loading another The operation of the dishwasher is automatic Each rack moves through the prewash wash and rinse zones then out onto the clean dish table The rinse lever is actuated by the dish rack and automatically shuts off the final rinse water when no rack is in the rinse zone Allow dishes to drain and air dry before removing from rack Machines equipped with the optional conveyor dwell feature will allow you to stop the conveyor in order to wash heavily soiled dishes for a longer time When the dish rack reaches the wash chamber turn the Conveyor switch OFF to stop the conveyor To start the conveyor again turn the Conveyor switch ON An overload mechanism is provided that will shut off the conveyor drive motor should the racks jam or the load become excessive After the jam is cleared push the Motor switch ON to restart the dishwasher 22 _ CLEANING The machine must be thoroughly cleaned at the end of each
5. sheet weighing at least 24 ounces per square foot the hood must be secured in place by noncombustible supports and must meet the RATE OF EXHAUST FLOW CALCULATIONS EXHAUST DUCT SHOULD BE CENTERED IN HOOD TYPE Il CANOPY HOOD E i TO4 CLEARANCE 6 MINIMUM OVERHANG ON ALL SIDES 18 MINIMUM OVERHANG AT LOAD AND UNLOAD OPENINGS Fig 6 3 PANT LEG VENT CONNECTIONS Figs 7 8 IMPORTANT Gas heat machines must be provided with a means to exhaust the flue gases to the exterior of the building Pant Leg duct connectors Fig 7 alone DO NOT provide ventilation for the gas flue at the rear ofthe machine A mini vent hood Fig 8 must be used or a canopy type hood may be used Moist air escapes from each end of the conveyor type dishwasher The exhaust requirements recommended are a maximum of 200 CFM at the entrance end of the dishwasher and a maximum of 400 CFM at the discharge end Optional vent hoods or extended hoods may be provided at each end of the machine Sufficient make up air must be provided so the exhaust flow results in a positive building pressure in the room in which the unit is located more outside air than exhaust air Hoods are provided with 4 x 16 vent connectors with vent dampers which allow adjustment during installation Typical construction is for Pant Leg hood connections to the 4 x 16 vent connectors Fig 5 Vent stacks must be watertight and fit insid
6. to accumulate on the bottom of the tank 14 Return all strainer pans strainer basket s and the pump intake strainer to their original locations 15 Install upper wash arms Rest the manifold on the rear hanger bracket with the open end of the arm next to the wash pipe and rotate the arm upward to latch it 16 Insert the lower wash arm at an angle between the conveyor and install the retainer over the pin Rotate the arm toward the catch and engage the hook into the notch Fig 14 17 Leave door s open and curtains removed while machine is not in use This will allow the interior to air out and dry DOs AND DON Ts FOR YOUR NEW HOBART WAREWASHER DO assure proper water hardness DO pre scrap dishes thoroughly DO use only detergents recommended by your chemical professional DO at the end of the day thoroughly cleanse the machine rinse and dry leave door open DO closely follow your chemical professional s prescribed deliming schedule DO use only products formulated to be safe on stainless steel DO NOT over soften water recommended water hardness is no less than 4 grains per gallon DO NOT use detergents formulated for residential dishwashers DO NOT allow food soil to accumulate on the tank bottom DO NOT exceed chemical manufacturer s recommended concentrations for detergent sanitizer rinse aid or lime scale remover DO NOT use steel wool to clean ware or warewasher surface DO NOT allow foreign objects to enter the unit esp
7. working shift or at least twice a day Use only products formulated to be safe on stainless steel 1 2 3 Turn the Motor and Power switches OFF Open the door s Standard door interlock switches prevent machine operation with inspection door s open Check the upper and lower final rinse nozzles to make sure they are free of lime and solids THREE SEGMENT ARMS ARE USED ON SOME MODELS FOUR SEGMENT ARM SHOWN PL 52442 Fig 14 4 Open drain s by pulling drain lever s up Fig 12 5 Remove wash arms Remove wash arm end caps Fig 14 and push any nozzle obstructions into the wash arms Thoroughly flush the wash arms in a sink and replace the wash arm end caps 6 Clean off any scraps from machine walls 7 Clean dish tables in the dishwasher 9 Clean pump intake strainer Fig 15 On C54A CRS76A CCS76A and CPW90A 11 Remove all strainer pans and strainer basket s Empty contents into garbage can or disposer and thoroughly clean pans and basket s machines remove both flowback strainer pans and clean Remove curtains Thoroughly scrub rinse and allow to dry at the end of each day s operation See Curtain Installation for proper curtain installation 23 13 Thoroughly wash out the interior of the machine with a heavy duty hose fitted with a squeeze valve Remove remaining soil with a cloth or soft brush and mild cleanser Rinse again with hose Do not allow food soil
8. AT ENTRANCE WASH RINSE PREWASH WHERE APPLICABLE lime all SHORT CURTAIN CRS STANDARD CURTAIN CPW SHORT CURTAIN CCS LOCATE AT ENTRANCE PL 51508 e OPERATION PREPARATION Put the dishwasher strainer pans and strainer basket Fig 3 into position in each dishwasher tank If the machine is equipped with an RS CS or PW unit install the solid prewash strainer pan over the overflow tube flange side down and the lip toward the rear of the tank Install one perforated strainer pan handle side up across the rear of the tank Install the other perforated strainer pan against the load end of the tank and locate the flange into the notches on the solid and perforated strainer pans Drop in the perforated strainer basket Fig 11 4 8 Prewash Strainer Pans AL Fig 11 Fig 12 Hang curtains on open hooks provided Refer to Curtain Installation Move drain lever s down to close the drain s Fig 12 or close the door s to automatically push the lever s down FILLING THE DISHWASHER Water must be proper hardness Recommended hardness range is 4 6 grains gallon Turn the Power switch ON Fig 1 Leave pumps OFF until machine has completely filled If the machine is equipped with an RS CS or PW unit the prewash tank will fill last with overflow water from the wash tank If the machine is equipped with steam heat the mechanical ball valve located between the driv
9. C LINE A amp AW DISHWASHERS MODEL R L OPERATION L R OPERATION C44A ML 38898 ML 38899 ML 104047 ML 104050 C44AW ML 103946 ML 103947 ML 104082 ML 104083 C54A ML 104199 ML 104198 C64A ML 103908 ML 103909 C88A ML 110042 ML 110041 CRS66A ML 38947 ML 38948 ML 104052 ML 104055 CRS66AW ML 103958 ML 103959 ML 104086 ML 104087 CRS76A ML 104202 ML 104201 CRS86A ML 103910 ML 103911 CRS110A ML 110044 ML 110043 CCS66A ML 104321 ML 104320 CCS66AW ML 104323 ML 104322 CCS76A ML 104325 ML 104324 CCS86A ML 104327 ML 104326 CCS110A ML 110046 ML 110045 ML 38955 ML 38956 ML 104058 ML 104061 CPW80AW ML 103964 ML 103967 ML 104090 ML 104091 CPW90A ML 104205 ML 104204 CPW100A ML 103912 ML 103913 CPW124A ML 110048 ML 110047 701 S RIDGE AVENUE TROY OHIO 45374 0001 FORM 17791 Rev Feb 2006 www hobartcorp com IMPORTANT FOR YOUR SAFETY THIS MANUAL HAS BEEN PREPARED FOR PERSONNEL QUALIFIED TO INSTALL GAS EQUIPMENT WHO SHOULD PERFORM THE INITIAL FIELD START UP AND ADJUSTMENTS OF THE EQUIPMENT COVERED BY THIS MANUAL POST IN A PROMINENT LOCATION THE INSTRUCTIONS TO BE FOLLOWED IN THE EVENT THE SMELL OF 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 MAIN SHUTOFF VALVE AND CONTACT THE LOCAL GAS COMPANY OR GAS SUPPLIER FOR SERVICE FOR YOUR SAFETY DO NOT STORE OR USE GASOLINE OR OTHER FLAMMABLE VAPORS OR LIQUIDS I
10. LEFT lt LEFT TO RIGHT RIGHT TO LEFT LEFT TO RIGHT FINALRINSE C54A SERIES WASH CAA AAW pen PREWASH CURTAIN MES CA4A SERIES GAS HEAT WHERE APPLICABLE M RINSE OR C44AW 8 C54A SERIES U ALL HEATS il gt SHORT CURTAIN CRS ll C44A AW SERIES STANDARD CURTAIN CPW III SHOWN REVERSE SHORT CURTAIN CCS FOR C54A SERIES LOCATE AT ENTRANCE WASH SERIES FINAL RINSE PREWASII FINAL l CB4A SERIES WHERE APPLICABLE C44A SERIES GAS HEAT mi RINSE Z SECTION ADD OR CA4AW amp C54A SERIES 117 STANDARD ALL HEATS CURTAIN SHORT CURTAIN CRS ii STANDARD CURTAIN CPW C44AJAW SERIES fi SHORT CURTAIN CCS SHOWN REVERSE LOCATE AT ENTRANCE FOR C54A SERIES ii TWO TANK MACHINES C64A SERIES a LL RINSE RINSE WASH PREWASH WHERE APPLICABLE A SHORT CURTAIN CRS STANDARD CURTAIN CPW SHORT CURTAIN CCS LOCATE AT ENTRANCE PREWASH WASH RINSE RINSE WHERE APPLICABLE PR SHORT CURTAIN CRS STANDARD CURTAIN CPW SHORT CURTAIN CCS LOCATE AT ENTRANCE 6 inches Higher Than Standard Models Only TWO TANK MACHINES C88A SERIES RIGHT TO LEFT lt RINSE LEFT TO RIGHT WASH L PREWASH FINAL WHERE APPLICABLE RINSE M SHORT CURTAIN CRS STANDARD CURTAIN CPW SHORT CURTAIN CCS LOCATE
11. N THE VICINITY OF THIS OR ANY OTHER APPLIANCE FOR YOUR SAFETY READ BEFORE OPERATING DO NOT USE THIS APPLIANCE IF ANY PART HAS BEEN UNDER WATER IMMEDIATELY CALL A QUALIFIED SERVICE TECHNICIAN TO INSPECT THE APPLIANCE AND TO REPLACE ANY PART OF THE CONTROL SYSTEM AND ANY GAS CONTROL WHICH HAS BEEN UNDER WATER IN THE EVENT OF A POWER FAILURE DO NOT ATTEMPT TO OPERATE THIS DEVICE TABLE OF CONTENTS L sz tus Ras pad as a DID eee eyes D eee aaa dt 4 Standard Equipment ba 5x b ai 5 Optional EQUIPMENT assar Oy POPRADE o gs Sam ROBO de 7 INSTALLATION Ss css sds das SE DES 8 Unpacking ssk remanran SAE gds de S Fr DA dd 8 Stall AMONG OOS Se a2 S25 34 52 Das a ee ba b A ra O Sc A 8 sle ue ated Si bed PR CASE ee ee ua ss 9 Water Requirements 10 Plumbing CONNECHONS es nas aces rias RC DME DELA AS eee nd ENE SE 11 Drain Coniection S u u u gu ys shuyay kana 06 edd puna S b gs ha ro kn pd bib 11 Fill amp Final Rinse Connection dan ba bk 11 Steam Connection When Equipped 11 Gas Connection When 12 Venting Requirements i stara bo ad ee oes eee Se Wed ane Sew ee Zee ores bos V 13 P am
12. NSTRUCTIONS GENERAL C Line A or AW Dishwashers are fully automatic rack type washers that convey the rack from one end of the machine to the other exposing the ware to progressive wash rinse action It has a stainless steel tank and chamber with a welded stainless steel angle frame stainless steel legs and stainless steel adjustable feet Front inspection door s provide access to the interior of the wash rinse cnambers CRS and CPW models also have a prewash inspection door The C44A AW CRS66A AW CCS66A AW CPW80A AW C54A CRS76A CCS76A 9 C64A CRS86A CCS86A and CPW100A machines are capable of either high or low temperature operation The C88A family is not available for low temperature operation Machines are available with steam gas or electric heat A Prewash Unit or Recirculating Scrapper are also available CONTROL PRESSURE BOX AUTO TIMER GAUGE POWER THERMOMETERS SWITCH MENTAL MOTOR OPTIONAL BOOSTER HEATER BOOSTER CONTROL BOX lt HEATER OPTIIONAL OPTIIONAL ML MOTOR wm WASH HEAT BOX MOTOR ELECTRIC EAT DRAIN 5 SHOWN PL 57313 Model C44A Right to Left Operation STANDARD EQUIPMENT Controls Fig 1 Auto Timer Switch Power Switch Motor Switch Fig 1 The controls are mounted on top of the cnamber There are three operational control switc
13. Z223 1 latest edition if applicable and the National Electrical Code ANSI NFPA 70 latest edition In Canada the installation standards are CAN CGA B149 1 CAN CGA B149 2 and CSA C22 2 No 1 latest editions ASSEMBLY Dish tables should be fitted into the dishwasher Fig 2 Use mastic between table and lip of tank to prevent leakage Rack track height should be from 4 to ie Fig 2 above the tank lip Dish tables should be sloped so that any water carried from the dishwasher will drain back into it CENTER LINE OF DISHWASHER 1 4 TO 5 16 DISHWASHER i i DISH TABLES DISHWASHER TANK Fig 2 Remove the strainer basket and strainer pans from the wash chamber Fig 3 Place the overflow tube in the retainer Fig 4 E 1 Fig 3 Fig 4 WATER REQUIREMENTS Proper water quality can improve ware washing performance by reducing spotting lowering chemical supply costs enhancing effectiveness of labor and extending equipment life Local water conditions vary from one location to another The recommended proper water treatment for effective and efficient use of this equipment will also vary depending on the local water conditions Ask your municipal water supplier for details about local water specifics prior to installation Recommended water hardness is 4 6 grains of hardness per gallon Chlorides must not exceed 50 parts per million Water hardness above 6 grains per gallon should be treated
14. by a water conditioner water softener or in line treatment Water hardness below 4 grains per gallon also requires water treatment to reduce potential corrosion Water treatment has been shown to reduce costs associated with machine cleaning reduce deliming of the dishwasher reduce detergent usage and reduce corrosion of metallic surfaces in the booster water heater and dishwasher Sediment silica chlorides or other dissolved solids may lead to a recommendation for particulate filtration or reverse osmosis treatment If an inspection of the dishwasher or booster heater reveals lime buildup after the equipment has been in service in line water treatment should be considered and if recommended should be installed and used as directed Contact your Hobart Service office for specific recommendations PLUMBING CONNECTIONS WARNING PLUMBING CONNECTIONS MUST COMPLY WITH APPLICABLE SANITARY SAFETY AND PLUMBING CODES The plumber who connects this machine is responsible for making certain that both water and steam lines are THOROUGHLY FLUSHED OUT BEFORE connecting to any manual valve or solenoid valve This flush out is necessary to remove all foreign matter such as chips resulting from cutting or threading of pipes pipe joint compound from the lines or if soldered fittings are used bits of solder or cuttings from the tubing Debris if not removed may lodge in the valves and render them inoperative Manual valves or solenoid valv
15. e motor and the tank must be opened by pulling the valve lever down 20 If the machine is equipped with gas heat refer to STARTING THE GAS HEAT DISHWASHER below The tank water temperature is regulated by the solid state thermostat The thermostat is preset at the factory and no adjustment should be required If an adjustment is necessary or the machine is to operate low temperature contact your local Hobart service office Use thermometers for verification of proper water temperatures Minimum temperatures for all models are Single Tank Models WASH TANK RINSE TANK FINAL RINSE C44A AW C54A 160 F Min 180 F Min CRS66A AW CRS76A CPW80A AW CPW90A CCS66A AW CCS76A Two Tank Models C64A CRS86A CCS86A 150 F Min 160 F Min 180 F Min CPW100A C88A CRS110A CCS110A CPW124A Minimum temperatures for optional low temperature operation are Wash Tank 140 F Rinse Tank 140 F Final Rinse 140 F If the tank is accidentally drained before turning off the power switch the float controlled low water protector switch will automatically stop the tank heat When the proper water level is returned the tank heat will be automatically started DO NOT use the low water protection as a power on off switch The heat MUST be turned OFF at the Power switch when the machine is not in use This machine must be operated with an automatic detergent feeder and if applicable an automatic chemical sanitizer feeder includ
16. e the vent connector openings A PANT LEG DUCT 4 x 16 VENT CONNECTOR EXTENDED HOBART C LINE DISHWASHER Fig 7 4 If using the Pant Leg duct a mini vent hood Fig 8 positioned about 18 above the flue exit at the rear of the dishwasher and connected to existing duct work must be used for the flue gases The volume of flue exhaust in the mini vent hood should not exceed 200 CFM MINI VENT HOOD 3 x 3 DUCT INTO CURRENT SYSTEM ZZ 4 18 GAP MINIMUM DISHWASHER FLUE EXIT Fig 8 In either case ifa powered means of exhaust is used an electrical interlock must be provided to allow the flow of gas to the dishwasher burner only when the exhaust system is in operation For additional information refer to the National Fuel Gas Code ANSI Z223 1 NFPA 54 In all cases local codes will prevail 15 RATE OF EXHAUST FLOW CALCULATIONS Based on the 2004 International Mechanical Code IMC The Rate of air flow required for a vent hood is now based on the linear length of the face of the hood instead of the area of the hood opening The length of the hood is measured along the front side that is parallel with the front line of the appliance LENGTH Fig 9 For hood designs not covered by these calculations consult the latest edition of the IMC or other local codes Type of Hood CFM per Linear Feet of H
17. ecially metallic contaminants NOTE Failure to follow use care and maintenance instructions may void your Hobart warewasher warranty 24 MAINTENANCE WARNING DISCONNECT THE ELECTRICAL POWER TO THE MACHINE AND FOLLOW LOCKOUT TAGOUT PROCEDURES Some machines may have more than one electrical power supply All supplies MUST be disconnected VENT When cool check the vent of this dishwasher every six months for obstructions LUBRICATION None required SERVICE Contact your local Hobart Service office for any repairs or adjustments needed on this equipment If a gas orifice fitting is to be adjusted or replaced have it serviced by qualified Hobart Service personnel Long term service contracts are available on this and other Hobart products _ 25 TROUBLESHOOTING SYMPTOM POSSIBLE CAUSE No Machine Operation Blown fuse or tripped circuit breaker at power supply Inspection door s not closed Conveyor jammed If Auto Timer was used the timer may have timed out If table limit switch is used the switch may be tripped Manual overload protector tripped on pump motors or conveyor motor Dishes Not Clean Insufficient wash water due to drain obstruction preventing proper drain closing Worn or torn drain O ring allowing wash water to drain Missing end plug from wash arm Wash arm nozzle obstruction Water leaking past manifold O ring Loss of water pressure due to pump obstructio
18. es fouled by foreign matter and any expenses resulting from this fouling are NOT the responsibility of the manufacturer DRAIN CONNECTION Connect the drain through a trap to the sewer using 2 pipe The common drain for the tank s requires only one connection to the floor drain If a grease trap is required by code it should have a minimum flow capacity of 31 gallons per minute 10 FILL amp FINAL RINSE CONNECTION Fig 5 FINAL RINSE PRESSURE VACUUM BREAKER GAUGE FILL FINAL FILL LINE JREAKER FINAL RINSE Kasi THERMOMETER PROBE COMMON WATER CONNECTION cat RINSE a FILL LINE LINE STRAINER Fig 5 Use 3 2 pipe for the connecting line A flowing pressure of 15 to 25 psig and a minimum temperature of 180 F must be maintained at the machine for common water connection for a non booster heat machine 110 F minimum temperature incoming water is required for machines equipped with an optional 30 Kw booster heater and 140 F minimum temperature incoming water is required for machines equipped with an optional 15 Kw booster heater Forlong runs use larger pipe and insulation to ensure adequate pressure and temperature If flow pressure exceeds 25 psig a pressure reducing valve not furnished must be installed in the supply line CAUTION The water pressure regulator must have a relief bypass Failure to use the proper type of pressure regulator may result in damage to the unit A pressure gau
19. from the gas supply line before reconnecting the appliance and its manual shutoff valve to the gas supply line CAUTION Failure to follow this procedure may damage the gas valve IMPORTANT Gas heat machines must be provided with a means to exhaust the flue gases to the exterior of the building Refer to Venting Requirements pages 13 16 The dishwasher must be installed so that the flow of combustion and ventilation air will not be obstructed Adequate clearances for air openings into the combustion chamber must be provided Make sure there is an adequate supply of make up air in the room to allow for combustion of the gas at the burner s Keep the appliance area free and clear from all combustible substances Do not obstruct the flow of combustion and ventilation air The dishwasher must have a minimum clearance from combustible construction of 3 at the rear and 0 at the sides A clearance of 40 must be provided at the front and 20 at each end of the dishwasher for servicing and proper operation The burner is ignited automatically by solid state electronic circuitry there is no pilot light Gas flow is regulated by the temperature control circuit 12 VENTING REQUIREMENTS Type Il Canopy Hood Most commercial dishwashers must be provided with external venting per local codes The exception is electric or steam heat machines operating in the chemical or low temperature sanitizing mode where the existing room ventilation will
20. ge is provided for verification of proper water pressure STEAM CONNECTION WHEN EQUIPPED CAUTION Steam supply pressure must agree with steam trap selection The steam trap supplied will be for either 0 to 20 psig flowing or 21 to 50 psig flowing The steam supply must be between 10 and 50 psig flowing pressure If flowing pressure exceeds 50 psig a pressure regulator not supplied must be installed in the supply line If flowing pressure is 10 psig use 1 piping if over 10 psig use 3 4 piping Steam flow is controlled by solenoid valves If machine is equipped with steam injector s one supply connection is required For single tank steam coil installations two connections are required one for supply and one for return For two tank steam coil installations one common supply connection and two return connections one per tank are required 11 GAS CONNECTION WHEN EQUIPPED Check the gas data plate attached to the dishwasher or tag attached to the gas burner tubing for type of gas to be used The burner is not adjustable If flowing gas pressure is above 7 W C natural gas or 11 W C propane gas an additional regulator valve not supplied must be installed in the supply line Static incoming line pressure should not exceed 14 0 W C for either propane or natural gas IMPORTANT Make sure the installation meets the local code for your area GAS SPECIFICATIONS Flowing Gas Pressure Not Static Inches
21. hes housed in the control box Power ON OFF Motor ON OFF and Timer MANUAL AUTO A pilot circuit transformer provides a reduced voltage of 115 volts for the machine controls When equipped for gas heat a step down transformer provides a reduced voltage of 24 volts for the igniter board s and valves Motor and Pump Units The wash rinse pump s are centrifugal type cast stainless steel with a stainless steel impeller The 2 HP motor is available in the following voltages Volts Hz Phase Volts Hz Phase 208 240 60 1 380 415 50 3 208 240 60 3 380 60 3 200 240 50 3 480 60 3 600 60 3 The conveyor drive motor is a s HP gear motor with the same voltage as the wash rinse pump motor A 1 HP prewash pump motor is standard on CRS and CCS models A 2 HP prewash pump motor is standard on CPW models Voltage and construction are the same as the wash rinse pump motor All motors have built in thermal overload protection with manual reset Vacuum Breakers The final rinse and fill lines contain an atmospheric vacuum breaker that prevents any reverse flow of water from the dishwasher into the potable water supply Heater Protection A float activated switch located in the wash tank and rinse tank if included automatically turns off the heat supply if the water level is too low Once the water returns to the proper level the heating circuit becomes operational if heat is demanded An overtemperature protector is also provided for electric
22. ing a visual means to verify that detergents and sanitizers are delivered or a visual or audible alarm to signal if detergents and sanitizers are not available for delivery to the respective washing and sanitizing systems See Plumbing Connection and Electrical Connections for proper installation STARTING THE GAS HEAT DISHWASHER 1 STOP Read the Safety Information on page 2 before operating this dishwasher 2 Turn main gas supply to the dishwasher ON 3 Wait for 5 minutes to clear out any gas If you then smell gas STOP Follow all safety information covered on page 2 in Important for Your Safety 4 If you don t smell gas turn the manual gas valve On 5 Turn the Power switch ON Fig 1 Dishwasher will fill automatically refer to Auto Fill When tank is filled the burner will ignite if heat is required The ignition system includes a 15 second pre purge period before ignition occurs 6 If the dishwasher will not operate follow the instructions below to turn off the gas to the dishwasher Call your local Hobart service office or gas supplier To Turn the Gas Powered Dishwasher Off Turn the Power switch OFF Turn the manual gas valve Off 21 DISHWASHING After the machine has filled start pumps by pushing the Motor switch ON Fig 1 Prescrap dishes thoroughly to remove large food particles and debris Never use steel wool on ware that is to be loaded into the dishwasher Stack dishes in the racks Do not stack
23. lable for 3 phase machines only Extended Hood Provides a dampered vent and acts as an effective splash shield for the discharge end of the wash chamber The exhaust requirement at the entrance end is 200 CFM maximum at the discharge end the exhaust requirement is 400 CFM maximum Side Loader Allows machine to be placed in a corner or used where area at the load end is limited Available without hood Vent Hood Sides are not as long as the extended hood A dampered exhaust opening controls steam and water splash to work area The exhaust requirement at the entrance end is 200 CFM maximum at the discharge end the exhaust requirement is 400 CFM maximum Table Limit Switch Shuts the machine off when the unload table is full of racks CS RS 22 Lower Prewash Arm Optional on the CRS and CCS models DDU38 Unloader Moves racks in a 90 degree arc from the unload end of the dishwasher to a dish table this allows the machine to be placed in a corner or to be used where area at the unload end is limited Separate Water Connection Individual Fill 140 F and Final Rinse 180 F min water connections are available on high temperature non booster machines only Booster Heater Interwired and interplumbed 30 kw or 15 KW booster heater INSTALLATION UNPACKING Immediately after unpacking the dishwasher check it for possible shipping damage If the machine is found to be damaged save the packaging material and c
24. leads at the control box terminal block On machines with a circuit breaker box reverse any two leads at the incoming power supply block in the circuit breaker box three phase only Start the machine momentarily and verify proper direction of rotation Electric Heat Connect a permanent electrical power supply to the line terminals of the control box The tank water temperature is regulated by a solid state thermostat which is preset at the factory and should not reguire adjustment If an adjustment is necessary orthe machine is to operate low temperature contact your local Hobart service office Use the machine thermometers for verification of proper water temperatures SA ELECTRICAL CONNECTIONS OPTIONAL EQUIPMENT WARNING ELECTRICAL AND GROUNDING CONNECTIONS MUST COMPLY WITH THE APPLICABLE PORTIONS OF THE NATIONAL ELECTRICAL CODE AND OR OTHER LOCAL ELECTRICAL CODES WARNING DISCONNECT THE ELECTRICAL POWER TO THE MACHINE AND FOLLOW LOCKOUT TAGOUT PROCEDURES OPTIONAL EQUIPMENT CONTROL CONNECTIONS Detergent Dispenser Maximum rating for detergent dispenser connected to DPS1 and DPS2 is 1 5 Amps at line voltage Rinse Aid Dispenser Maximum rating for rinse aid dispenser connected to RPS1 and RPS2 is 1 5 Amps at line voltage Vent Fan Control Maximum rating for vent fan control connected to VFC1 and VFC2 is 1 5 Amps pilot duty 18 CURTAIN INSTALLATION SINGLE TANK MACHINES C44A AW AND C54A SERIES RIGHT TO
25. ns DISCONNECT THE ELECTRICAL POWER TO THE MACHINE AND FOLLOW LOCKOUT TAGOUT PROCEDURES Drain tank s and check for any obstruction at the pump intake Incorrect water temperature Check circuit breaker to electric heat supply or main steam valve Make certain valve is completely open Incorrect detergent dispensing Contact your detergent representative Strainer pans buckets need to be emptied and or cleaned Leaking Valve Except Foreign material preventing proper valve operation A critical period Solenoid Type Supplied by is soon after installation when pipe compound or metal shavings Others may lodge at the valve seat Shut off supply line Unscrew and lift bonnet from valve body Clean valve and reassemble If problem is with a solenoid valve it is recommended that you contact your local Hobart Service office Spotting of Silverware Improperly loaded racks Glasses and Dishes Incorrect final rinse water temperature 180 F min Loss of water pressure due to pump obstruction DISCONNECT THE ELECTRICAL POWER TO THE MACHINE AND FOLLOW LOCKOUT TAGOUT PROCEDURES Drain tank s and check for any obstruction at the pump intake Clogged wash arm nozzles Improper water hardness 4 to 6 grains gallon is the recommended range Incorrect detergent for water type Clogged rinse nozzle s Low Final Rinse Temperature Tank float not up to allow heat to turn on With Booster Heater Overtemp protector
26. ontact the carrier within 15 days of delivery Prior to installation verify that the electrical service agrees with the specifications on the machine data plate which is located on the right hand side of the control box for non booster machines and on the left hand side of the control box for booster equipped machines The electrical diagram is located on the inner surface of the control box cover After unpacking the dishwasher remove the items shipped uninstalled overflow tube literature envelope splash shields curtains and chamber hole plug kit and instructions from inside the dishwasher Set the dishwasher in its proper location Adjust the height and level by turning the adjustable feet NOTE The dishwasher must be positioned and leveled before making plumbing connections NOTE This machine must be operated with an automatic detergent feeder and if applicable an automatic chemical sanitizer feeder including a visual means to verify that detergents and sanitizers are delivered or a visual or audible alarm to signal if detergents and sanitizers are not available for delivery to the respective washing and sanitizing systems See instructions for electrical and plumbing connections located in this manual and in the feeder equipment manual Chemical feeders are supplied by others INSTALLATION CODES Installation must be in accordance with state and local codes or in the absence of local codes with the National Fuel Gas Code ANSI
27. ood Wall Mounted Canopy 200 CFM Single Island Canopy 400 CFM Subtract make up air flow supplied directly to a hood cavity from the total exhaust flow rate of the hood if applicable A m LENGTH CLEARANCE L Fig 9 16 ELECTRICAL CONNECTIONS DISHWASHER WARNING ELECTRICAL AND GROUNDING CONNECTIONS MUST COMPLY WITH THE APPLICABLE PORTIONS OF THE NATIONAL ELECTRICAL CODE ANSI NFPA 70 LATEST EDITION AND OR OTHER LOCAL ELECTRICAL CODES WARNING DISCONNECT THE ELECTRICAL POWER TO THE MACHINE AND FOLLOW LOCKOUT TAGOUT PROCEDURES THERE MAY BE MULTIPLE CIRCUITS BE SURE ALL CIRCUITS ARE DISCONNECTED Some machines may have more than one electrical power supply All supplies MUST be disconnected Motor s Connect a permanent electrical power supply to the terminal block in the control box Three phase motor s must rotate the impeller in the direction of the arrow found on the pump housing of the motor pump unit Fig 10 the drive motor can rotate in either direction Before placing the machine into service a check must be made to verify correct rotation Only one motor needs to be checked as the machine is wired at the time of manufacture so that all motors will rotate the same direction Prewash Pump M Motor Fig 10 If the impeller does not rotate in the direction of the arrow DISCONNECT POWER SUPPLY IES to the machine and interchange any two power supply
28. r debris and freemovement Problem with solenoid valve Drain leaks NOTE If symptom s persists after possible causes have been checked contact your local Hobart Service office 07 NOTES FORM 17791 Rev O Feb 2006 28 PRINTED IN U S A
29. t Leg vent Con lon vy bos n oto BG SEAMS hee oe Me hee RSE RE 14 Rate of Exhaust Flow Calculations nata des da buka dads abe eta oa 16 Electrical Connections 5 17 Electrical Connections Optional Equipment 18 Optional Equipment Control Connections 18 CumalinStallanon 2 tescence nes Epi SE week eet asda na EE Coan 19 OPERATION SEMP ceed tesa sends eee E RT VA ee ees 20 Preparation co 60 026 eE Oss PR D Raw Poe glad yee 20 Pilling the Dishwasher ssas once ceed edie HERR eee Oe eek eee eee 20 Starting the Gas Heat 21 DISHWASHING hs diad ed eats sa IEEE SHEER 22 CLEANING cs ose kk dk pi R S ba Ped Peed R Eee 23 DOs and DON Ts for Your New Hobart Warewasher 24 MAINTENANCE sa ska vas ooo saa Boas ce be ees Sree des AP RE 25 Wells naire dee as s sed ker sb een ee 25 Lubrication ssa as HERE CESP PUC o v been tee eens OSIE 25 SOVICE 23 hod aS puqpu ni a b b ot 25 TROUBLESHOOTING sei bind Sie eb D n ba bl sko nado dk hawa do n 26 Installation Operation and Care Of C LINE A amp AW DISHWASHERS SAVE THESE I
30. the machine or push the Motor switch ON To change the time setting contact your local Hobart authorized service office Common Drain A stainless steel common drain tube connects the dishwasher and prewash drains together thus requiring only one drain connection at installation Front Panel Stainless steel front panel conceals pumps and plumbing Common Water Connection A single water connection for fill and final rinse is standard This requires a minimum incoming water temperature of 180 F for high temperature machines 140 F for low temperature machines for machines not equipped with booster heater A minimum incoming water temperature of 110 F is required for machines equipped with an optional 30 Kw Hobart booster heater and a minimum incoming water temperature of 140 F is required for machines equipped with an optional 15 Kw Hobart booster heater OPTIONAL EQUIPMENT Blower Dryer Dishes are dried by forced heated air 3 phase machines only The exhaust requirement at the vent stack of the blower dryer is 1400 CFM Conveyor Dwell The optional conveyor dwell switch Conveyor ON OFF is housed in the control box and shuts the conveyor drive motor off Condenser Removes excess moisture from exhaust air before returning air to dishroom only on machines without booster Single Point Electrical Connection Option for electric heat machines Requires one electrical service connection for non booster machines Avai
31. tripped Circuit breaker to heat system tripped Incoming water is below minimum temperature Temperature control needs adjustment or booster heater failure Contact your local service office 26 SYMPTOM POSSIBLE CAUSE Inadequate Rinse Continuous Rinse Operation No Wash Tank Heat No or Slow Fill Dirty line strainer Fig 5 causing reduced water flow Turn off water supply remove strainer cap and withdraw and clean screen Reassemble Low supply line pressure Clogged rinse nozzle s Rinse actuator Fig 16 not moving freely DISCONNECT THE ELECTRICAL POWER TO THE MACHINE AND FOLLOW LOCKOUT TAGOUT PROCEDURES Check actuator for movement T Z Actuator a PL 21975 Fig 16 Check for foreign object in mechanism i e silverware Rinse valve failed or jammed open Contact your local Hobart Service office The machine is equipped with low water safety devices which shut off heat if water level drops Check for proper water level Circuit breaker to heat system tripped Check heat float for debris and free movement Steam supply valve not open completely Overtemp protector tripped Contact your local Hobart Service office Dirty line strainer Fig 5 causing reduced water flow Turn off water supply remove strainer cap and withdraw and clean screen Reassemble Make sure doors are closed Check both upper and lower fill floats fo
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