Hobart AM14C ML-110977 Dishwasher User Manual
Contents
1. Rl bb 6 Without Electric or Gas Booster Water Heater 6 With Electric Booster Water Heater Z GAS TANK HEAT ur s a s buka Sina 7 VENTING REQUIREMENTS WITH GAS TANK HEAT 8 RATE OF EXHAUST FLOW CALCULATIONS 9 ELECTRICAL CONNECTIONS omnes nce steppes te weed bba s i a wi 10 10 Check Rotation Three Phase Machines Only 10 Electric Booster Water Heater 10 OPTIONAL EQUIPMENT CONNECTIONS Vent Fan amp Gas Booster 11 Vent Fan Control we Pee CROSSE 11 Hobart Infrared Booster Gas Water 11 DETERGENT RINSE AID OR SANITIZER DISPENSERS Tubing Installation 12 Detergent 12 Rinse Aid Dispenser 12 Chemical Sanitizer Dispenser 12 OPTIONAL EQUIPMENT CONNECTIONS Detergent Rinse Aid Sanitizer Dispenser 13 Detergent DISPENSE ae 13 Rinse Aid and or Sanitizer Dispenser 13 OPERATION sisa hoes bees se Oe tib ba seen 40 04 0 6 See s us bes2. MODEL AM14 amp AM14C DISHWASHERS MODELS AM14 ML 110976 AM14C ML 110977 CORPORATION 701 S RIDGE AVENUE TROV OHIO 45374 0001 937 332 3000 www hobartcorp com FORM 34554 Dec 2000 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 UNIT S 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 IN THE VICINITY OF THIS OR ANY OTHER APPLIANCE HOBART CORPORATION 1982 1995 2 TABLE OF CONTENTS GENERAL phe ass u b eR PS SORES 4 INSTALLATION wins HR eRe usus asa wasl eee Hed supi ai a 5 UNPACKING u i A e a 5 INSTALLATION CODES boas ede see 30 00 5 0 pag aw ap KE ORE 48 6 5 LOCATION a tara jie Bil 5 WATER REQUIREMENTS l verb u au nce is bed Y u us paf Tes 6 PLUMBING CONNECTIONS 3 es vse 2 Hoes it ern ba kw bib ee ES 6 DRAIN CONNECTION nti GH wah g ala 6 WATER CONNECTION
3. with Booster Heater shown Fig 1 DO NOT attempt to operate this dishwasher in the chemical sanitizing mode without a properly installed NSF listed chemical sanitizer feeder not supplied with machine Contact an authorized detergent representative for information about a chemical sanitizer feeder The pump motor is rated 1 H P and has thermal overload protection The fill line incorporates an atmospheric vacuum breaker to prevent any reverse flow of water from the dishwasher into the potable water supply A float located in the wash tank will shut off the heat supply if the water level becomes too low When the water returns to a proper level the heating circuit is again operational A frame mounted 13KW electric booster water heater is available as an option on machines equipped with electric tank heat The booster water heater is designed to maintain a minimum final rinse temperature of 180 F provided the incoming water to the booster heater is at least 110 F Also available as an optional accessorv is the model IB57 Infrared Booster Gas Water Heater 4 INSTALLATION UNPACKING Immediatelv after unpacking the dishwasher check for possible shipping damage If this machine is found to be damaged save the packaging material and contact the carrier within 15 davs of deliverv Prior to installation test the electrical service to make sure it agrees with the specifications on the machine data plate which
4. from 40 to 60 seconds To have the cvcle time adjusted contact vour local authorized Hobart Service Office When the fill final rinse valve is on water from the booster tank enters the dishwasher through the final rinse arms During the rinse cycle this water is 180 F Water will likely dribble out of the lower rinse arm into the tank between cvcles due to the natural expansion of water as it is being heated GAS TANK HEAT When Specified GAS PRESSURE SPECIFICATION Check the gas data plate attached to the L dishwasher or the tag attached to the incoming Tvpe gas piping for the tvpe of gas to be used BTU HR Incoming Line Pressure Line Pressure Incoming Line Pressure manifold Connect the gas supply to 2 NPT gas Pressure inlet at the manual gas valve The burner is Minimum Maximum not adjustable The maximum flowing inlet Natural 20 000 45 105 32 gas pressure must not exceed the Maximum am14 Natural value in the table If line pressure exceeds AM140 Propane 20 000 90 130 90 the Maximum value in the table an additional regulator valve not supplied must be installed in the supply line Static inlet line pressure should not exceed 14 W C The minimum value is for purpose of input adjustment The gas valve Fig 3 is provided with a pressure tap to measure the gas pressure downstream which is also the manifold pressure Gas supplv piping must have a sediment trap supplied bv others installe
5. includes the optional electric booster if equipped The dishwasher data plate is located on the side of the control box 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 2223 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 LOCATION Place the dishwasher in its operating location Before finalizing the location make sure that consideration has been given for the electrical conduit water supply drain connection gas supply and venting if applicable tabling if needed chemical feeder replenishment if applicable and adequate clearance for opening the doors Allow adequate clearance for service The control box Fig 1 is mounted 4 s below the dish table when shipped from the factory It canbe changed to 11 s or below the dish table by removing the two mounting bolts and reinstalling them in the holes provided DISH TABLE The dishwasher must be level before any connections s j are made Turn the threaded feet Fig 1 as required to level the machine and adjust to the desired height SEAL TO PRE VENT LEAKAGE Dish tables should be turned down and fitted into the dishwasher Fig 2 Use an NSF approved sealer betweentable andtank lipto preventleakag
6. of Open Sides 2 Sides Open 3 Sides Open 4 Sides Open L ELEWEW Dimensions Fe j If there are four open sides Island Design the calculation of the Rate is as follows Q 75xA If there are three or fewer open sides the calculation of the Rate is as follows Q 50xA As an alternate method the Rate can be calculated as follows Q 50xP xD Example L 3 W 3 D 2 Rate Calculations Number of Open Sides 2 Sides Open 3 Sides Open 4 Sides Open Q 75xA 675 CFM _ E wama Q 50xPxD 600 CFM 900 CFM 1200 CFM ELECTRICAL CONNECTIONS WARNING ELECTRICAL AND GROUNDING CONNECTIONS MUST COMPLY WITH THE APPLICABLE PORTIONS OF THE NATIONAL ELECTRICAL CODE AND OR OTHER LOCAL ELECTRICAL CODES WARNING DISCONNECT ELECTRICAL POWER SUPPLY AND PLACE A TAG AT THE DISCONNECT SWITCH TO INDICATE THAT YOU ARE WORKING ON THE CIRCUIT Dishwasher Refer to the wiring diagram attached inside the control box and to the machine data plate for service size requirements when connecting the dishwasher Also refer to Electrical Data page 12 The dishwasher electrical service connection can be made through the 1 s diameter hole for 2 4 inch trade size conduit located at the bottom of the right side of the control box By removing a knockout this hole can be enlarged to 1 4 diameter for 1 inch trade size conduit A fused disconnect switch or circuit breaker not supplied must be installed in the electrical service line supp
7. the wash and rinse arms rotate freely and are free of any obstructions Check rinse nozzles Figs 14 15 to make sure they are free of any lime and solids RINSE NOZZLE RINSE ARM WASH ARM HAND KNOB RINSE NOZZLE UNSCREW TO REMOVE WASH ARM WASH RINSE ARMS Fig 14 Fig 15 16 DOs AND DON Ts FOR YOUR NEW HOBART WAREWASHER DO assure proper water hardness 4 6 grains per gallon is recommended 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 doors 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 especially metallic contaminants NOTE Failure to follow use care and maintenance instructions may void your Hobart warewasher warranty 17 MAINTENANCE WARNING DISCONNECT ELECTRICAL POWER SUPPLY BOTH DISHWASHER AND BOOSTER IF APPLICABLE AN
8. D PLACE A TAG S AT THE DISCONNECT SWITCH ES TO INDICATE THE CIRCUIT S ARE BEING WORKED ON BEFORE BEGINNING ANY MAINTENANCE PROCEDURE Wash Arms Upper and lower wash and rinse arms Figs 14 15 should turn freely and continue turning for a few seconds after being whirled by hand To check DISCONNECT ELECTRICAL POWER SUPPLY BOTH DISHWASHER AND BOOSTER IF APPLICABLE rotate arms and remove any obstructions causing improper operation If the slanted strainer or strainer bucket is not properly in place obstructions such as food particles or bones may clog the wash arm nozzles The wash arms are easily removed for cleaning Removing Wash Rinse Arms AM14 AM14C To remove the lower wash arm first lift off the rinse arm then using a dowel or end of punch unscrew the rinse arm bearing pin Fig 14 and lift off the lower wash arm It is not necessary to remove the spacer located on the lower wash arm shaft The upper wash and rinse arms are removed by unscrewing the hand knob Fig 15 and lowering both arms together Be careful not to drop these arms Motor s The wash pump motor and the blower motor used on gas heat machines are equipped with permanently lubricated bearings and require no lubrication maintenance Gas Flue Machines equipped for gas heat only When cool check the flue opening everv three months for obstructions 18 TROUBLESHOOTING Manual Reset Button on Pump Motors MOTOR ENDBELL MOTOR RE
9. SET BUTTON The motor is equipped with a gray manual reset button Fig 16 near the end bell of the motor opposite of the motor junction box If the pump motor becomes overheated the thermal overload protector will cause the motor to not operate If this occurs press the power switch OFF and allow the motor overload protector to cool for a few minutes Then press the gray manual reset button press the power switch ON and resume normal operation Fig 16 To avoid a service call check symptoms and related possible causes If machine still does not operate properly contact Service SYMPTOM POSSIBLE CAUSE No machine operation 1 Blown fuse or tripped circuit breaker at power supply Cycle switch Fig 2 may be on MANUAL turn switch to AUTOMATIC Check tank water level Dishes not clean 1 Insufficient wash water due to drain obstruction preventing proper drain closing Worn or torn drain O Ring allowing wash water to drain Loss of water pressure due to pump obstruction DISCONNECT ELECTRICAL POWER SUPPLV BOTH DISHWASHER AND BOOSTER IF APPLICABLE and drain tank Check for anv obstruction at the pump intake 4 Incorrect water temperature Check circuit breaker to electric heat supply Incorrect detergent dispensing Contact your detergentrepresentative Excessive mineral deposits throughout wash and rinse system Deliming may be necessary Spotting silverware glasses 1 Improperly loaded racks and dishes 2 I
10. The maximum switching rating for a vent fan control relay connected to terminals VFC1 and VFC2 is 1 5 Amps The ventfan control relay provides switch contacts only and does not provide power to the vent fan motor When the dishwasher is connected to the vent fan the vent fan is switched on when the dishwasher is on and off when the dishwasher is off Hobart Infrared Booster Gas Water Heater The maximum rating for connecting a Hobart Model IB57 Dishwasher Activated infrared gas booster water heater to BSTR1 and BSTR2 is 0 5 Amp at 24 Volts If a Stand Alone Booster Heater is used no electrical connection to the dishwasher is allowed Refer to the Infrared Booster Gas Water Heater Manual for additional installation details il DETERGENT RINSE AID OR SANITIZER DISPENSERS Tubing Installation Detergent rinse aid and or sanitizer dispensers not provided bv Hobart must have all connections sealed against leakage REMOVE PLUGS TO INSTALL The dishwasher uses 1 2 gallons per rack at a flow rate of 8 gallons per minute at 20 psig flowing pressure equivalent to a maximum head pressure of 46 feet of water This information is used when setting the detergent rinse aid or sanitizer pumps Detergent Dispenser The left side of the dishwasher has two 7 diameter plugged holes one upper hole and one lower hole Fig 7 An alternate diameter plugged lower hole is located on the front tank wall Fig 7 With the tank emp
11. ater temperature When the wash and rinse cycles are finished open the doors remove the clean dishes slide in another rack and close the doors If you want to add a dish after the wash cycle has started turn off the power switch and wait 10 seconds to allow wash arm coastdown and avoid water splashing before opening the doors Operating temperatures for all models are as follows Wash Temperature Rinse Temperature Sanitizing Mode mum Wash Wash Minimum ins Recommended 15 CLEANING The machine must be thoroughiv cleaned at the end of each working shift or at least dailv Never use steel wool to clean warewasher surfaces Use only products formulated to be safe on stainless steel Turn off the power switch Open the machine doors Clean off the dish tables into the dishwasher Drain the machine by pulling the drain lever Fig 11 Remove and empty the slanted strainer and strainer bucket Wash and rinse them thoroughly Raise the overflow cover and remove the overflow tube Wash and rinse the overflow tube inside and out Remove the pump strainer if equipped and clean in a sink Thoroughly cleanse and flush the dishwasher interior Remove remaining soil with a soft cloth or brush and mild cleanser Rinse again Do not allow food soil to accumulate on the tank bottom Replace all removed parts Leave the machine doors open to allow the interior to dry and air out Make sure that
12. bstructed 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 1 inch from the flue at the rear and 0 inches at the sides A clearance of 40 inches must be provided at the front of the dishwasher for servicing and proper operation The burner is ignited automaticallv bv solid state electronic circuitrv there is no pilot light Gas flow is regulated bv the temperature control circuit VENTING REQUIREMENTS WITH GAS TANK HEAT The Hobart AM14 AM14C 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 The most common method of venting is a vent hood over the entire dishwasher Fig 4 Refer to Rate of Exhaust Flow Calculations on the next page for calculations of the proper vent rate for your hood Another method is a small vent hood Fig 5 positioned about five inches above the flue exit at the rear of the dishwasher and connected to existing ductwork In either case an electrical interlock must be provided to allow the flow o
13. cal service line supplying this booster and should meet the requirements of your local electrical code The electric booster service connection is made through the 1 4 hole for 1 inch trade size conduit located at the bottom of the control box Ifthe booster is three phase the electrical connection is made to the contactor 3CON in the control box If the booster is single phase the electrical connection is made to the terminal block 4TB in the control box The machine must be grounded according to electrical code s a grounding lug is provided in the control box 10 ELECTRICAL DATA Minimum Circuit Ampacitv Maximum Protective Device Volts Hz Ph Tank Heat AMES Optional 13 KW Dishwasher Dishwasher ONLY ssc Booster ONLY E s o 208 240 60 1 D E E Ce s jr 208 240 60 3 L T 480 60 3 IF s Compiled in accordance with the national electrical code ANSI NFPA 70 latest edition OPTIONAL EQUIPMENT CONNECTIONS Vent Fan and Gas Booster WARNING ELECTRICAL AND GROUNDING CONNECTIONS MUST COMPLY WITH THE APPLICABLE PORTIONS OF THE NATIONAL ELECTRICAL CODE AND OR OTHER LOCAL ELECTRICAL CODES WARNING DISCONNECT ELECTRICAL POWER SUPPLY AND PLACE A TAG AT THE DISCONNECT SWITCH TO INDICATE THAT YOU ARE WORKING ON THE CIRCUIT Vent Fan Control The vent fan control feature is standard on machines with gas heat it is a field installable accessory on machines with electric heat
14. d ahead of the dishwasher s gas control Fig 3 NOTE use Teflon tape on gas line pipe threads For gas line pipe connections use Loctite 565 Hobart part 546292 or a 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 a sss local codes with the National Fuel Gas Code ANSI Z223 1 latest edition ka Copies mav be obtained from American Gas Association Inc 1515 Wilson Boulevard Arlington VA 22209 The appliance and its individual shutoff valve must be disconnected from the gas supplv piping svstem during any pressure testing of that system at test pressures in excess of 2 psig 3 45kPa 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 2 psig 3 45kPa Dissipate test pressure from the gas supply line before re connecting the appliance and its manual shutoff valve to the gas supply line Caution Failure to follow this procedure may damage the gas valve Gas Valve Manual Valve By Others Fig 3 The dishwasher must be installed so that the flow of combustion and ventilation air will not be o
15. e Fasten the tables to the tank lip with truss head screws High temperature or gas heat dishwashers will probably require a hood or vent over the dishwasher in order to meet local codes Low temperature chemical sanitizing machines or low usage electric heat dishwashers mav not require individual venting of the machine if the room is amplv exhausted Refer to pages 8 and 9 for venting and hood requirements Fig 2 WATER REQUIREMENTS Proper water qualitv can improve ware washing performance bv reducing spotting lowering chemical supplv costs enhancing effectiveness of labor and extending equipment life Local water conditions varv from one location to another The recommended proper water treatment for effective and efficient use of this equipment will also varv depending on the local water conditions Ask vour 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 bv a water conditioner water softener or in line treatment Water hardness below 4 grains per gallon also requires a 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 heate
16. e 14 Seated 14 DISHWASHING tib a 15 CLEANING Qaqa hisa 16 DOs AND DON Ts FOR YOUR NEW HOBART WAREWASHER 17 MAINTENANCE L jet baton i i epee Gate w E 18 Washi ANNS a taa taa Sab 18 a au 18 Gas NP iui te wr i L e 18 TROUBLESHOOTING a Enne beeen beac 19 Manual Reset Button on Pump 19 SERVICE pataman weed pipi uuu ure ua a u a l e Gb 20 Installation Operation and Care of MODEL AM14 amp AM14C DISHWASHERS SAVE THESE INSTRUCTIONS GENERAL The AM14 dishwashers are semi automatic rack tvpe machines On model AM14 the doors open on opposite sides ofthe machine allowing the rack to move straight through Model AM14C can be located in a corner adjacent doors open so the rack moves in and out ata 90 angle The AM14 and AM14C dishwashers are designed to operate in one of two modes Hot water sanitizing mode designated bv the letter H at the end of the machine serial number or a chemical sanitizing mode designated by the letter L at the end of the machine serial number The serial number can be found on the machine data plate Model AM14 Model AM14C i
17. f gas to the dishwasher burner ONLY when the exhaust system is energized For additional information refer to the National Fuel Gas Code ANSI 2223 1 NFPA 54 IMPORTANT Make sure the installation meets the local code for your area 3 x 3 DUCT INTO CURRENT SYSTEM l je 4 lt A lt MINIMUM MINI VENT HOOD gt gt OVERHANG ON ALL SIDES 18 OVERHANG lt 6 gt RECOMMENDED OVER LOADING OR 5 GAP UNLOADING DOORS MINIMUM DISHWASHER FLUE as a z Fig 4 Fig 5 NOTE Anv listed and labeled factorv built commercial exhaust hood tested in accordance with UL Standard 710 bv a nationallv recognized testing laboratorv should be installed according to the terms of its listing and the manufacturer s KT xl installation instructions CLEARANCE 4 LENGTH HEIGHT RATE OF EXHAUST FLOW CALCULATIONS Basedon the 1996 International Mechanical Code The Rate of air flow required for a vent hood is calculated using the following definitions Fig 6 ii Q Rateof Air Flow in Cubic Feet Per Minute or Required for the Hood A Area of Hood Opening in Feet L x W D Clearance Height Distance in Feet from lower lip of hood to top of dishwasher chamber P Perimeter of Hood that is Open This depends on the hood design as follows Fig 6 Perimeter Calculation Formula Hood Design Corner Wall Island Number
18. level drops Check for proper water level If the water level is too low the overflow tube might be out of position Or something may be inhibiting free movement of low water float remove any foreign object from around low water float magnet Circuit breaker to machine tripped Gas line closed If a failure occurs due to the gas heat control board or gas pressure the reset button located on the side of the gas burner control box will pop out This completely shuts off the gas heat system To reset the system push the button in If the system does not reset contact Service Water supply may be off make sure water supply valve is open Dirty line strainer causing reduced water flow Turn off water supply remove strainer cap withdraw and clean screen Reassemble If equipped with electric booster normal dripping from the lower rinse arm will occur during water heating due to expansion of the water This will occur once between machine cycles If water dribbles or leaks continuously from rinse arms on any machine refer to Leaking Valve above Contact your local Hobart authorized 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 authorized service personnel Long term service contracts are available on this and other Hobart products FORM 34554 Dec 2000 20 PRINTED IN U S A
19. low Tube Fig 11 An automatic detergent dispenser is recommended Closely follow supplier s instructions If no automatic dispenser is used scatter the initial charge of detergent on the slanted strainer Replenish as needed Close the doors which will automatically close the drain On model AM14 The front inspection door must be closed before the counterbalanced doors can be lowered Open the manual gas valve if applicable Push the Power switch ON Fig 12 If all machine doors are closed the fill cycle will begin automatically During the fill cycle the word FILL will flash intermittently on the control box readout Fig 12 NOTE If the fill cycle did not begin automatically make sure that the CycLe Switcu Fig 12 is on AUTOMATIC and the WasH Rinse switch Fig 8 is OFF When the fill cycle has completed the readout will display the wash temperature During the rinse cycle the rinse temperature will be displayed CYCLE SWITCH CONTROL BOX READOUT POWER SWITCH WASH RINSE SWITCH PL 41177 1 Fig 12 14 DISHWASHING Scrape the dishes to remove large particles of food and debris Never use steel wool on ware to be loaded into the dishmachine Fig 13 Stack the dishes in a rack Do not stack dishes one on top of another as water must have free access to all sides of every dish Stand plates and dishes up edgewise in a peg type rack Fig 13 Cups glas
20. lying this dishwasher and should meet the requirements of your local electrical code All power supply connections are made at the terminal block 1 TB in the control box The machine must be grounded according to electrical code s a grounding lug is provided in the control box Check Rotation Three Phase Machines Only Three phase motors must rotate in the direction of the arrow on the pump housing In order to check rotation observe the motor fan through the end bell Close the machine doors and press the power switch to ON When the machine is completely filled place the cycle switch located on the side of the control box on MANUAL and place the WASH RINSE switch located under the cycle switch on WASH The motor fan must rotate in the direction of the arrow on the pump housing If the rotation is incorrect DISCONNECT ELECTRICAL POWER SUPPLY and interchange any two of the incoming power supply leads Reconnect the power supply and verify correct rotation Electric Booster Water Heater The Electric Booster electrical connection is separate from the dishwasher electrical connection Refer to Electrical Data page 11 Before making electrical connection test the electrical service to assure that it agrees with the specifications on the Electric Booster portion of the data plate Also refer to the wiring diagram attached inside the cover of the control box A fused disconnect switch or circuit breaker must be installed in the electri
21. m the side of the control box Strain relief fittings must be provided for all wiring Rinse Aid and or Sanitizer Dispenser Fig 10 Terminals RPS1 and RPS2 are supplied with controlled machine line voltage and are ON during the rinse cycle only and OFF between cycles or when machine power supply is OFF Maximum rating for rinse aid dispenser connected to RPS1 and RPS2 is 1 5 Amps at line voltage Check the machine supply voltage and use corresponding feeder transformer voltage Use UL listed 600 volt minimum insulated wire to make the necessary connections Do not use bell wire lamp cord or similar type wire Splice connections if required must be made in the feeder transformer junction box not in the main control box Remove s diameter plug s for a trade size conduit fittings from the side of the control box Strain relief fittings must be provided for all wiring DETERGENT DISPENSER TRANSFORMER PRIMARY SECONDARY RINSE AGENT DISPENSER Q p p pip p p TRANSFORMER PRIMARY SECONDARY CHEMICAL SANITIZER DISPENSER MAIN CONTROL BOX Fig 10 13 OPERATION PREPARATION Place the pump strainer when equipped overflow tube overflow cover end cover slanted strainer and the strainer bucket in their respective positions Fig 11 Drain Slanted Strainer Overflow L End Cover Strainer Bucket 1 Overf
22. mperature Hot Water Sanitizing 180 82 180 82 F 82 Chemical Sanitizing Normal 120 F 49 140 F 60 C Chemical Sanitizing Light Duty 120 F 49 C 140 F 60 C Proper dishwasher operation requires a flowing pressure of 20 5 psig at the dishwasher If the flowing pressure exceeds 25 psig a pressure reducing valve not supplied must be installed in the water supply line CAUTION The water pressure regulator must have a relief by pass Failure to use the proper type of pressure regulator may result in damage to the unit A pressure gauge Fig 1 is provided for verification of proper water pressure The water pressure is monitored when the solenoid valve is open and water is flowing 6 With Electric Booster Water Heater The water supply line is connected to the flow control ahead of the line strainer below the booster with 3 4 pipe A manual shut off valve and pipe union are required The water supply should have a minimum temperature of 110 F and a flowing pressure of 15 25 psig at the pressure gauge on top of the machine If the flowing pressure exceeds 25 psig a pressure reducing valve not supplied must be installed in the water supplv line CAUTION The water pressure regulator must have a relief bv pass Failure to use the proper tvpe of pressure regulator mav result in damage to the unit Incoming water temperature below 110 F may require the wash cycle time to be extended
23. ncorrectrinse water temperature 3 Loss of water pressure due to pump obstruction DISCONNECT ELECTRICAL POWER SUPPLV BOTHDISHWASHER AND BOOSTER IF APPLICABLE and drain tank Check for anv obstruction at the pump intake Excessivelv hard water Incorrect detergent for water tvpe Incorrect rinse additive for water tvpe PL Incorrect concentration of detergent rinse additive and or sanitizer 19 SVMPTOM Inadequate rinse or rinse water temperature too low Leaking valve except solenoid No wash tank heat No or slow fill Dribbling water from lower rinse arm SERVICE POSSIBLE CAUSE 1 Dirtv line strainer causing reduced water flow Turn off water supplv remove strainer cap withdraw and clean screen Reassemble Low supply line pressure Excessive mineral deposits throughout wash and rinse svstem Deliming may be necessary Incoming water temperature to booster if applicable below 110 F Extend wash cycle from 40 to 60 seconds Foreign material preventing proper valve operation NOTE A critical period is soon after installation when pipe compound or metal shavings may lodge at the valve seat Shut off supply line Unscrew and lift bonnet from valve body Clean valve and reassemble If a solenoid valve is malfunctioning not opening or not closing it is recommended that you contact Service The machine is equipped with a low water safety device which shuts off heat if the water
24. r and dishwasher Sediment silica chlorides or other dissolved solids mav lead to a recommendation for particulate filtration or reverse osmosis treatment If an inspection of the dishwasher or booster heater reveals lime build up 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 vour Hobart Service office for specific recommendations PLUMBING CONNECTIONS WARNING PLUMBING CONNECTIONS MUST COMPLV WITH APPLICABLE SANITARV SAFETV AND PLUMBING CODES DRAIN CONNECTION The drain connection is made using 2 pipe If a right hand drain is desired on an electric heat machine it can be changed from the standard left hand bv removing the pipe plug from the drain valve and reinstalling it in the opposite end of the drain valve On gas heat machines the drain must be connected on the right side If a grease trap is required by code it should have a minimum flow capacity of 42 gallons per minute WATER CONNECTION A suitable water hammer arrestor should be installed in the water line just ahead of the dishwasher Without Electric or Gas Booster Water Heater The water supply line is connected to the line strainer Fig 1 with a pipe A manual shut off valve and pipe union are required The required incoming water supplv temperature follows Fill and Final Rinse Water Supplv Sanitizing Mode Minimum Temperature Recommended Te
25. ses and bowls should be inverted in an open type or compartment type rack 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 The dishwasher can be operated automatically or manually by setting the cycle switch in the desired position When the Cyce Switch Fig 12 is seton AUTOMATIC the wash and rinse cycles begin automatically The wash cycle is initiated when the machine doors are closed The rinse cycle begins when the wash cycle is completed NOTE When the Cyc Le Switcu is set on AUTOMATIC the Wash Rinse switch Fig 12 must be OFF When the CvcLE Switcu is set on MANUAL the wash cycle is initiated by placing the WAsH Rinse switch in the WASH position After the desired wash time minimum 40 seconds recommended hold the Wash Rinse switch in the RINSE position for the desired rinse time minimum 18 seconds recommended After filling a rack open the appropriate doors slide the rack into the dishwasher and close the doors If the cycle switch is set on AUTOMATIC the wash cycle will begin automatically Throughout the wash cycle the tank water temperature will be displayed on the control box readout along with the word WASH During the rinse cycle the rinse water temperature will be displayed along with the word RINSE When the rinse cycle is completed the readout will display the tank w
26. ty remove one upper plug and one lower plug to i i ALTERNATE install the detergent dispenser DETERGENT GENSOR e The upper hole is for installation of the detergent feeder tube of the lower holes is used for installation of the detergent sensor Rinse Aid Dispenser The rinse line flange connector on top of the dishwasher has two NPT pipe plugs Fig 8 Remove either front or rear plug Fig 8 for installation of the rinse aid dispenser tube unless a chemical sanitizer is to be installed If installing a chemical sanitizer use the rear hole for the rinse aid dispenser Chemical Sanitizer Dispenser When the dishwasher is to be operated in the chemical sanitizing mode the machine must be converted to low temperature sanitization by an authorized Hobart trained service technician and a chemical sanitizer dispenser that has been tested and recognized by NSF International must be installed Remove the front pipe plug Fig 8 for installation of the chemical sanitizer tube To assure an unobstructed flow of sanitizer locate the sanitizer tube in the denter of water flow bv drilling the sanitizer tube fitting so that its inside diameter is equal to the outside diameter of the Top of Dishwasher tube Slide the tube into the flange until it DETERGENT SENSOR REAR PL 41512 1 Fig 7 REAR PIPE PLUG FRONT PIPE PLUG touches the opposite rear side and then pull it back o
27. ut 2 inch Fig 9 4 5 7 ml with 9 seconds maximum Rate for 8 4 Sodium hypochlorite bleach 3 4 ml with 9 seconds maximum 12 Slide tube in until it lt e Rate for5 25 Sodium hypochlorite bleach touches then pull it N N N N PL 41510 1 FRONT Sanitizer Tube Rinse Line I Flange Connector 5 OPTIONAL EQUIPMENT CONNECTIONS Detergent Rinse Aid Sanitizer Dispensers WARNING ELECTRICAL AND GROUNDING CONNECTIONS MUST COMPLY WITH THE APPLICABLE PORTIONS OF THE NATIONAL ELECTRICAL CODE AND OR OTHER LOCAL ELECTRICAL CODES WARNING DISCONNECT ELECTRICAL POWER SUPPLY AND PLACE A TAG AT THE DISCONNECT SWITCH TO INDICATE THAT YOU ARE WORKING ON THE CIRCUIT Detergent Dispenser Fig 10 Terminals DPS1 and DPS2 are supplied with controlled machine line voltage They are ON during the wash cycle and OFF between cycles or when the machine power supply is OFF Maximum rating for detergent dispenser connected to DPS1 and DPS2 is 1 5 Amps at line voltage Check the machine supply voltage and use corresponding feeder transformer voltage Use UL listed 600 volt minimum insulated wire to make the necessary connections Do not use bell wire lamp cord or similar type wire Splice connections if required must be made in the feeder transformer junction box not in the main control box Remove s diameter cap plug s for 2 trade size conduit fittings fro
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