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    NSTR

    UCTIONS

    I

    MODEL HWM

    FORM 34539 Rev. A (July 2002)

    701 S. RIDGE AVENUE

    TROY, OHIO 45374-0001

    937-332-3000

    www.hobartcorp.com

    MODEL HWM Water Meter

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    2 HOBART CORPORATION, 2001

    TABLE OF CONTENTS

    GENERAL............................................................................................................................................ 3

    INSTALLATION ................................................................................................................................... 3

    Unpacking ................................................................................................................................. 3

    Location ................................................................................................................................... 3

    Wall Mounting .......................................................................................................................... 3

    Installation Codes and Standards ........................................................................................... 4

    Electrical Connections ............................................................................................................ 4

    Water Supply ............................................................................................................................ 5

    Drain Connections.................................................................................................................... 6

    Plumbing Connections ............................................................................................................ 7

    Assembly ................................................................................................................................ 10

    Setting the Water Pressure ................................................................................................... 10

    OPERATION ...................................................................................................................................... 11

    Controls .................................................................................................................................. 11

    Before First Use ..................................................................................................................... 13

    Using the HWM Water Meter ................................................................................................. 14

    Using the Temperature Probe ............................................................................................... 15Locking and Unlocking the Units of Measure ....................................................................... 15

    Water Chiller Flush Time ....................................................................................................... 16

    Shutdown ................................................................................................................................ 17

    Cleaning .................................................................................................................................. 17

    MAINTENANCE ................................................................................................................................. 18

    Service and Parts Information ............................................................................................... 18

    Calibrat ion Check ................................................................................................................... 18

    TROUBLESHOOTING ....................................................................................................................... 19

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    3

    INSTALLATION, OPERATION AND CARE OFMODEL HWM WATER METER

    SAVE THESE INSTRUCTIONS

    GENERAL

    The Hobart Water Meter is a microcomputer-controlled water delivery system that enables you toaccurately control the water requirements for your baking needs. Through the proper control of watertemperature and volume, the Hobart Water Meter will help you gain uniform baking results andmaximum productivity.

    Hobart Water Meters are produced with quality workmanship and material. Proper installation, usageand maintenance of your water meter will result in many years of satisfactory performance.

    It is suggested that you thoroughly read this entire manual and carefully follow all of the instructions

    provided.

    INSTALLATION

    The water meter requires separate hot and cold supply lines. Each line should have a manual shutoffvalve (not supplied) at the water meter for servicing and shutdown. Before installing, verify that theelectrical service agrees with the specifications on the rating plate located on the left panel of the watermeter. If the supply and equipment requirements do not agree, do not proceed with the installation.Contact Hobart Corporation immediately.

    UNPACKING

    This water meter was inspected before leaving the factory. The transportation company assumes fullresponsibility for safe delivery upon acceptance of the shipment. Immediately after unpacking, checkfor possible shipping damage. If the water meter is found to be damaged, save the packaging materialand contact the carrier within 15 days of delivery.

    LOCATION

    Before finalizing location, make sure that consideration has been given for water supply, draining,electrical outlets and service clearances.

    WALL MOUNTING

    The water meter has a detachable base for wall mounting. It is secured by a 10/32" machine screwlocated on the bottom panel.

    1. With the water meter lying flat, control face up, remove the 10/32" machine screw and angleholddown.

    2. Slide the water meter forward and set aside.

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    4

    3. Position the base on the wall and level left to right using a carpenters level.

    4. Mark the position and hole location.

    5. Mount the base to the wall using the appropriate mounting fasteners.

    6. Slide the water meter, with the control panel facing up, downward onto the base. Make sure thehorizontal groove on the back of the water meter is lined up with the top edge of the base.

    7. Secure water meter to the base with the 10/32" machine screw and angle holddown.

    8. Check to make sure the water meter is level.

    INSTALLATION CODES AND STANDARDS

    The water meter must be installed in accordance with:

    In the United States of America:

    1. State and local codes.

    2. National Electrical Code, ANSI/NFPA-70 (latest edition). Copies may be obtained from TheNational Fire Protection Association, Batterymarch Park, Quincy, MA 02269.

    In Canada:

    1. Local codes.

    2. Canadian Electric Code, CSA C22.1 (latest edition). Copies may be obtained from The CanadianStandard Association, 178 Rexdale Blvd., Etobicoke, Ontario, Canada M9W 1R3. (electricequipment)

    ELECTRICAL CONNECTIONS

    WARNING: ELECTRICAL AND GROUNDING CONNECTIONS MUST COMPLY WITH THEAPPLICABLE PORTIONS OF THE NATIONAL ELECTRICAL CODE AND/OR OTHER LOCAL

    ELECTRICAL CODES.WARNING: APPLIANCES EQUIPPED WITH A FLEXIBLE ELECTRIC SUPPLY CORD ARE PROVIDEDWITH A THREE-PRONG GROUNDING PLUG. THIS PLUG MUST BE CONNECTED INTO APROPERLY GROUNDED THREE-PRONG RECEPTACLE. IF THE RECEPTACLE IS NOT THEPROPER GROUNDING TYPE, CONTACT AN ELECTRICIAN. DO NOT REMOVE THE GROUNDINGPRONG FROM THIS PLUG.

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    Electrical data is located on the left panel as you face the water meter. Route the power cord safelyout of the way of other equipment, personnel and moisture.

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    5

    Water Chiller Electrical Connections

    If water chiller is pump-driven, connect chiller to water meter as described in steps 1 through 5 below.

    Connection to the water chiller circuit should be done by a qualified electrician or service technician.The auxiliary switch is located in the top-mounted junction box.

    WARNING: DISCONNECT THE ELECTRICAL POWER TO THE MACHINE AND FOLLOW

    LOCKOUT / TAGOUT PROCEDURES

    1. Verify that the water chiller circuit does not exceed the auxiliary switch rating.

    2. Remove the junctions box cover screws, cover and gasket.

    3. Connect water chiller and meter per Fig. 1 below.

    4. Install the junction box gasket and cover. Secure with the previously removed junction boxscrews.

    5. Connect power to the meter. While test is flowing, verify that the water chiller pump motor isrunning in the proper direction.

    PL- 53595

    L1N

    PUMP MOTOR

    PUMPPOWERSUPPLY

    WIRE PROVIDEDBY OTHERS

    WATER METER JUNCTION BOX(LOCATED ON TOP OF THE WATER METER)

    WATER CHILLER

    BLACK BLACK

    TO METER

    Fig. 1

    WATER SUPPLY

    The water meter requires separate hot and cold supply lines. A manual shutoff valve (not supplied)should be installed on each supply line at the water meter to accommodate servicing and shutdown.

    HOT WATER INLET TEMPERATURE: 140F (38

    C) recommended.

    HOT AND COLD WATER FLOWING PRESSURE: 30 psi minimum.

    WATER HARDNESS: 4 to 6 grains per gallon is recommended.

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    6

    DRAIN CONNECTIONS

    On standard water meters, no drain connection is required. However, the water meter should belocated near a sink for the water dispensing hose to drain into while test flowing or when water isadjusting to a set temperature.

    For water meters equipped with a water chiller, a bypass return line should be connected back to thewater chiller reservoir. Chillers without a water reservoir will need a sink, or a drain may be required

    for the flushed water to drain into when testing or autoflushing (adjusting to temperature set point).

    WATER METER AND HAND SINK SETUP

    H

    H C

    H C

    C

    C

    D

    H

    H

    ELECTRIC CONNECTION

    DRAIN CONNECTION

    J BOX

    HOT WATER W/SHUTOFFS

    COLD WATER W/SHUTOFFS

    18"

    66-1/2"AFF

    36"AFF

    12"AFF

    2

    4"

    WATERMETER

    1/2" HOT & COLD WATERW/SHUTOFFS. HARD COPPER

    LINE TO WATER METER

    1/2" HOT & COLDWATER CONN.W/SHUTOFFS1-1/2" WASTE

    FLOOR

    HAND SINK

    120V/1/1A.

    4"

    LEGEND

    PL-53607

    2

    '-6"

    NOTE: The Hot and Cold Water Supply lines can vary in location.

    Fig. 2

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    7

    PLUMBING CONNECTIONS

    WARNING: PLUMBING CONNECTIONS MUST COMPLY WITH APPLICABLE SANITARY, SAFETYAND PLUMBING CODES.

    Connection to the water supply should be done by a qualified plumber or service technician.

    Make sure the water lines are thoroughly flushed out BEFORE connecting to the water meter. This

    flushout is necessary to remove all foreign matter, such as chips (resulting from cutting or threadingof pipes), pipe joint compound from the lines, or, if soldered fittings are used, bits of solder or cuttingsfrom the tubing. Debris, if not removed, may lodge in the valves and render them inoperative.

    Manual valves or solenoid valves damaged by foreign matter, and any expenses resulting from thisdamage, may not be covered under warranty.

    Water Chiller Plumbing Connections

    For water meters equipped with the water chiller option only.

    1. Connect the water meter cold water supply tubing to the water chiller pump outlet tubing (Fig. 3).

    2. Connect the bypass line (supplied) from the water chiller tank to the test flow bypass port on thebottom of the water meter (Fig. 3). Use the bypass line hose fittings (supplied).

    3. If not provided, drill a 1 1/32" hole through the lid of the water chiller tank, and install the bypassline hose fitting and nut (supplied).

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    8

    WATER METER WITH OPTIONAL WATER CHILLER AND PLUMBING CONNECTIONS

    PL-53597

    Cold WaterSupply Line

    Hot WaterSupply Line

    Water ChillerBypass Line

    Test FlowBypass Port

    Pump

    Water Chiller Tank

    NOTE: The Hot and Cold Water Supply lines can vary in location.

    Fig. 3

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    9

    WATER METER WITH PLUMBING CONNECTIONS

    PL-53572

    Cold Water

    Supply Line

    Hot Water

    Supply Line

    Power Cord

    Junction

    Box

    Pressure

    Regulator

    Y-Strainer

    Dual Check

    Valve

    Dispenser

    Hose

    Dispenser

    Hose Hook

    Vacuum

    Breaker

    Shutoff Valve

    (Not Supplied)

    Hand Held

    Temperature Probe

    Water Chiller Bypass Line

    (Optional)Test Flow Bypass Port

    (Optional)

    Union

    Connector

    T-Fitting with

    Pressure Gauge

    (Set at 20 PSIG)

    90 Elbow

    NOTE: The Hot and Cold Water Supply lines can vary in location.

    Fig. 4

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    10

    ASSEMBLY

    The water meter is supplied with external fittings/components that must be assembled before the watersupply is connected.

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    Assemble the fittings to the water meter as shown in Fig. 4. Use teflon tape or pipe joint compoundwhen assembling.

    The union connection on the water meter has a flat doughnut gasket. Make sure the gasket isin place before connecting any fittings.

    Plug the hand held temperature probe into the end of the flexible cable attached to the bottompanel of the meter.

    SETTING WATER PRESSURE

    For the water meter to operate properly, the water pressure should be set at 30 psi on each regulatorwhile it is operating at 99F (37C). See Operation on the following pages for a description of the control

    panel.1. Press CHANGE F/C to select Fahrenheit or Celsius. (If the CHANGE F/C key is locked, see

    Locking and Unlocking the Units of Measure on page 15.)

    2. Press SET TEMP and enter 99F (37C) on the numeric key pad. The water temperature valueis displayed in the WATER TEMPERATURE window.

    3. Hook the dispensing hose over the rim of a sink or drain.

    4. Press TEST FLOW. The water begins dispensing. The actual water temperature of the flowingwater is displayed in the WATER TEMPERATURE window.

    5. Allow the flowing water temperature to reach 99F (37C).

    6. Adjust both hot and cold water regulators until the pressure gauges read 20 psi.

    7. Press STOP/0 when complete.

    8. Place the dispensing hose on the hook located on the side of the water meter.

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    11

    OPERATION

    CONTROLS

    Hand Held Temperature Probe

    The temperature window displays the temperature recorded by the hand held probe. The probemeasures the temperature of the room, dough or flour. The temperature range is 32F to 99F(0C to 37C).

    Water Temperature

    SETTING window - Displays the water temperature as the water meter is dispensing. It also displaysthe selected water temperature when the meter is idle.

    FULL COLD light- Indicates the mixing valve is using cold water only.

    ADJUSTING light- Indicates the mixing valve is adjusting the water temperature.

    FULL HOT light - Indicates the mixing valve is using hot water only.

    -

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    12

    Water Amount

    SETTING

    DELIVERED

    AMOUNT

    POUNDS OUNCES

    LITERS CENTILITERS

    FRACTION

    POUNDS: 0-999 OUNCES: 0-15

    TEST FLOWING

    DELIVERING

    INTERRUPTED

    COMPLETED / READY

    WATER AMOUNT

    PL-56132

    SETTING window - Displays the amount of water to be delivered, in pounds and ounces, or liters andcentiliters. Up to five digits may be entered; the last two digits are always for ounces or centiliters.

    Setting ranges are as follows:

    Pounds: 0 to 999 Ounces: 0 to 15

    Liters: 0 to 461 Centiliters: 0 to 99

    DELIVERED window - Displays the amount of water dispensed in pounds and ounces, or liters andcentiliters.

    TEST FLOWING light- Indicates the meter is dispensing continuously in the test flow mode.

    DELIVERING light- Indicates the meter is dispensing the entered water amount.

    INTERRUPTED light - Indicates the meter has stopped before all of the water amount could bedelivered.

    COMPLETED/READY light - Indicates the meter has dispensed the entered water amount, and isready for the next dispensing cycle.

    UNITS OF MEASURE light -Indicates which conventionof measurement is selected for display in theSETTING and DELIVERED windows.

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    13

    Control Panel

    CONTROL PANEL

    1 UNITS OFMEASURE

    SET

    TEMP.

    TEST

    FLOW

    2

    2 31

    5 64

    8 97

    WATER TEMPERATURE

    For new temperature setting: test flow(continuous) to sink until meter adjusts.

    3 WATER AMOUNTPress once to clear SETTING amount.Press again to clear DELIVERED amount.

    4 DELIVER TO MIXER.

    CHANGE CHANGE

    LB/LITER

    TEST

    FLOW

    SETAMOUNT

    START

    RESUME

    F / C

    STOP

    0NOTE: FLUSH FOR 30 SECONDS

    BEFORE USE.

    PL-56133

    For complete control of the water meter functions, a numeric key pad and the following control keysare provided.

    CHANGE F/C key - Press to choose Fahrenheit or Celsius.

    CHANGE LB/LITER key - Press to choose Pounds/Ounces or Liters/Centiliters.

    SET TEMP key - Press to enter desired water temperature. Enter the value on the numeric keypad.

    TEST FLOW key - Dispenses water continuously. The meter brings the water up to the entered settemperature.

    SET AMOUNT key - Press to enter the amount of water you would like to dispense. Enter the valueon the numeric key pad.

    START/RESUME key - Press to dispense the entered water amount. Press to resume dispensing cycleafter an interruption.

    STOP/0 key - Press to stop dispensing water.

    BEFORE FIRST USE

    The water meter should be checked for dispensing accuracy before operation begins. See Calibration

    Check on page 18.

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    14

    USING THE HWM WATER METER

    Setting Water Temperature

    1. Make sure water meter is in proper units - Fahrenheit/Celsius

    2. Press SET TEMP.

    3. Enter desired temperature on the numeric key pad. The water temperature value is displayed inthe WATERTEMPERATURE window.

    4. Hook the dispensing hose over the rim of a sink or drain.

    5. Press TEST FLOW. The water begins dispensing. The actual water temperature of the flowingwater is displayed in the WATERTEMPERATURE window.

    6. When the water reaches the selected temperature, press STOP/0.

    7. Place the dispensing hose on the hook, located on the side of the water meter.

    NOTE: Do not drain the remaining water from the hose. If the dispensing hose is dropped or drained,repeat steps 4 through 7.

    Setting Water Amount

    1. Press CHANGE LB/LITER to select Pounds/Ounces or Liters/Centiliters. (If the CHANGE LB/LITER key is locked, see Locking and Unlocking the Units of Measure on page 15.)

    2. Press SET AMOUNT.

    3. Enter the desired water amount value on the numeric key pad. The entered value is displayedin the WATER AMOUNT SETTING window.

    NOTE: When entering Pounds/Ounces, the value for Ounces must be 15 or less; otherwise, theOUNCES display will blink and no water will dispense.

    Dispensing Water

    NOTE: Before each use of the water heater, flush the hose for 30 seconds.

    1. Hook the dispensing hose over the rim of the mixer bowl or other container.

    2. Press START/RESUME to begin dispensing water.

    3. If the actual water temperature fluctuates more than 5F (-15C) from the set temperature:

    a. Press STOP/0 to interrupt dispensing.

    b. Hook the dispensing hose over the rim of a sink or drain and press TEST FLOW.

    c. When the water returns to the selected set temperature, press STOP/0.

    d. Place the dispensing hose on the rim of the mixing bowl. Press START/RESUME tocomplete the water delivery.

    4. When dispensing is complete, remove the hose from the mixing bowl and place it on the hooklocated on the side of the water meter. Do not drain the hose.

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    Operating Hints

    To interrupt the water delivery, press STOP/0.

    To continue dispensing, press START/RESUME.

    To cancel dispensing, press SET AMOUNT.

    The amount of water dispensed is displayed in the WATER AMOUNT DELIVERED window.

    When the delivery is complete, the display will blink and indicate 000 POUNDS (LITERS) 000OUNCES (CENTILITERS).

    USING THE TEMPERATURE PROBE

    1. Verify that the hand held temperature probe is plugged into the end of the flexible cable attachedto the bottom panel of the meter.

    NOTE: The probe can be used to measure the temperature of the room, dough or flour in the rangeof 32F to 99F (0C to 37C). The probe must be in place for 30 seconds to get an accurate temperaturereading.

    2. Place the end of the probe where the temperature needs to be measured. The HAND HELDTEMPERATURE window will display the temperature reading.

    LOCKING AND UNLOCKING THE UNITS OF MEASURE

    The CHANGE LB/LITER and the CHANGE F/C key can be locked to prevent them from beingchanged. To determine if the keys are locked:

    Press CHANGE F/C. If the water meter beeps, and the units of measure displayed in theWATER TEMPERATURE SETTING window change from F to C or vice versa, then the unitsof measure are not locked.

    If the units of measure DO NOT change, then they are locked.

    Locking

    1. Press CHANGE F/C to select Fahrenheit or Celsius.

    2. Press CHANGE LB/LITER to select Pounds/Ounces or Liters/Centiliters.

    3. Press SET TEMP and enter 32 on the numeric keypad.

    4. Press SET AMOUNT and enter 94404 on the numeric keypad. The WATER AMOUNT SETTINGwindow displays 944 lb 04 oz.

    5. Press START/RESUME. TheWATER TEMPERATURE SETTING window displays 000.

    6. Enter 001 using the numeric keypad.

    7. Press START/RESUME to save setting.

    8. The units of measure are now locked.

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    Unlocking

    1. Press SET TEMP and enter 32 on the numeric keypad.

    2. Press SET AMOUNT and enter 94404 on the numeric keypad. The WATER AMOUNT SETTINGwindow displays 944 lb 04 oz.

    3. Press START/RESUME. The WATER TEMPERATURE SETTING window displays 001.

    4. Enter 000 using the numeric keypad.

    5. Press START/RESUME to save setting.

    WATER CHILLER FLUSH TIME

    For water meters equipped with the water chiller option only.

    Water is circulated through the water chiller bypass line to the chiller tank. The flush time setting allowsthis water to stabilize to the entered water temperature before it is dispensed to the mixing bowl. Thedefault flush time is 30 seconds.

    Checking Flush Time

    1. Press SET TEMP.

    2. Enter the lowest desired temperature using the numeric key pad.

    3. Hook the dispensing hose over the rim of the sink or drain.

    4. Press TEST FLOW.

    5. If the actual water temperature displayed reaches the desired set temperature when waterbegins flowing through the dispensing hose, DO NOT adjust the flush time.

    6. Press STOP/0.

    Changing Flush Time

    The flush time should be set long enough so the desired set temperature is reached before switchingfrom the water chiller bypass line to the dispensing hose.

    1. Press SET TEMP.

    2. Enter 32 using the numeric keypad.

    3. Press SET AMOUNT.

    4. Enter 91101 using the numeric keypad. The WATER AMOUNT SETTING window displays 911lb 01 oz.

    5. Press START/RESUME. The WATER TEMPERATURE SETTING window displays the currentflush time in seconds.

    6. Enter a new flush time value between 0 and 120 using the numeric key pad.

    7. Press START/RESUME to save this setting.

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    17

    SHUTDOWN

    Shutdown procedures should be followed when the water meter is not used for an extended period oftime.

    1. Hook the dispensing hose over the rim of a sink or drain.

    2. Close the hot and cold water supply valves.

    3. Press TEST FLOW.

    4. When the water stops flowing, press STOP/0.

    5. Empty any remaining water from the dispensing hose.

    6. Place the dispensing hose on the hook located on the side of the water meter.

    7. Unplug the power cord from the electrical outlet.

    CLEANING

    WARNING: DISCONNECT THE ELECTRICAL POWER TO THE MACHINE AND FOLLOWLOCKOUT / TAGOUT PROCEDURES.

    1. Clean the hand held temperature probe daily with warm, soapy water. Follow with a warm waterrinse. Wipe with a soft, dry cloth.

    2. Clean the stainless steel surfaces with a damp cloth and polish with a soft, dry cloth. To removediscolorations, use a nonabrasive cleaner.

    3. Clean the control panel with a damp cloth only.

    4. Do not use any cleaners containing oil or other flammable ingredients.

    5. Do not spray the water meter with a hose, pressure washer or steam cleaner.

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    18

    MAINTENANCE

    WARNING: DISCONNECT THE ELECTRICAL POWER TO THE MACHINE AND FOLLOWLOCKOUT / TAGOUT PROCEDURES.

    On an annual basis, have the temperature, water volume and water weight settings calibrated by an

    authorized service technician.

    At regular intervals, check the temperature probe, water volume and weight against a known constantfor accuracy (see Calibration Check below).

    SERVICE AND PARTS INFORMATION

    Contact your local Hobart authorized Service Office.

    CALIBRATION CHECK

    Checking Delivery Repeatability

    You will need three 12 oz. sample containers and a digital scale that has a minimum precision of0.1 oz. for this test. Make sure to zero the scale with an empty sample container before starting.

    NOTE: Wait 30 seconds between filling each of the containers.

    1. Set the water meter to measure in pounds and ounces.

    2. Set water delivery amount to 0 lb 12 oz.

    3. Hook the dispensing hose over the rim of a sample container.

    4. Press START/RESUME to dispense a water sample. Do not drain the remaining water from thehose between deliveries. If the dispensing hose is dropped or drained, start at step 1 again.

    5. Discard the first sample. Repeat steps 2 and 3 to collect three 12 oz. samples.

    6. When the dispensing is complete, place the hose on the hook located on the side of the watermeter.

    7. Weigh each sample on the digital scale and record the results.

    8. If the weights of the sample are not within 1 oz. of each other, repeat steps 1 through 7.

    9. If the second pair of sample measurements still vary more than 1 oz. of each other, call your local

    Hobart authorized Service Office.

    Checking Meter Accuracy

    1. Take the average weight of the samples collected above (add the three sample weights anddivide the total by 3). Compare the result with the water amount displayed in the WATERAMOUNT SETTING window (0 lb 12 oz.).

    2. If the sample average result is 1.5 oz. or more from the set water amount, call your local Hobartauthorized Service Office.

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    19

    TROUBLESHOOTING

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    dereviledretawehtfoerutarepmetehT

    .erutarepmettesehthctamtonseod

    enodtonsawerudecorpwolFtseTehT

    .retawgnisnepsiderofeb

    erutarepmeTretaWgnitteSeeS no

    .41egap

    onsahyekC/FEGNAHCehT

    .tceffe

    ehtnodelbanesituokcolehT

    .noitcnufC/FEGNAHC

    kcolnuot61egapnognikcolnUeeS

    .noitcnufC/FEGNAHCeht

    onsahyekRETIL/BLEGNAHCehT

    .tceffe

    ehtnodelbanesituokcolehT

    .noitcnufRETIL/BLEGNAHC

    kcolnuot61egapnognikcolnUeeS

    .noitcnufRETIL/BLEGNAHCeht

    If symptom(s) persist call your local Hobart authorized Service Office.

  • 7/29/2019 F34539 Rev A

    20/20

    20

    NOTES

    FORM 34539 R A (J l 2002) PRINTED IN U S A