Hobart AM15, AM15F, AM15T, ML-130038, ML-130045 User Manual

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AM SELECT DISHWASHERS
MODELS
AM15 ML-130038 AM15F ML-130045 AM15T ML-130039
701 S. RIDGE AVENUE
TROY, OHIO 45374-0001
937 332-3000
www.hobartcorp.com
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.
Model AM15 Model AM15F Model AM15T
PRESSURE GAUGE
© HOBART CORPORATION, 2004
Fig. 1
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TABLE OF CONTENTS

GENERAL 4
INSTALLATION 5
UNPACKING 5 INSTALLATION CODES 5 LOCATION 5
CORNER INSTALLATION 6 WATER REQUIREMENTS 7 PLUMBING CONNECTIONS 8
DRAIN CONNECTION 8
WATER CONNECTION 8
Without Electric Booster Water Heater 8 With Electric Booster Water Heater 8
GAS TANK HEAT (When Specified) 9
VENTING REQUIREMENTS — WITH GAS TANK HEAT 10
Rate of Exhaust Flow Calculations 11
ELECTRICAL CONNECTIONS 12
Dishwasher Without Electric Booster 12 Check Rotation (Three Phase Machines Only) 12 Dishwasher With Electric Booster (Separately Connected) 13 Dishwasher With Electric Booster (Single Point Electrical Connection) 13
EQUIPMENT CONNECTIONS 13
Vent Fan Control 13 Remote Booster Control 13
DETERGENT, RINSE AID, SANITIZER DISPENSERS – TUBING INSTALLATION 14
Detergent Dispenser 14 Rinse Aid Dispenser 14 Chemical Sanitizer Dispenser 14
EQUIPMENT CONNECTIONS – Detergent, Rinse Aid, Sanitizer Dispensers 15
Detergent Dispenser 15 Rinse Aid / Sanitizer Dispenser(s) 15
SETUP (All Models) 16
Sanitizing Mode 16 End of Cycle Buzzer 16
OPERATION 17
PREPARATION 17
DISHWASHING 18
CLEANING 19
DELIME INSTRUCTIONS 20
DOs AND DON’Ts FOR YOUR NEW HOBART WAREWASHER 20
MAINTENANCE 21
Wash Arms 21 Motor(s) 21 Flue (Machines Equipped With Gas Tank Heat Only) 21
TROUBLESHOOTING 22
Manual Reset Button on Pump Motor 22
SERVICE 24
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Installation, Operation, and Care of
AM SELECT DISHWASHERS
SAVE THESE INSTRUCTIONS

GENERAL

Models AM15 and AM15T dishwashers can be configured for straight through or corner operation. Model AM15F is configured for front loading. AM15 and AM15T dishwashers are shipped from the factory in straight-through configuration. Straight-through machines can easily be converted to corner operation. Model AM15F includes a front-loader shelf and left- and right-side shields as standard equipment. The front-loader shelf on AM15F can be positioned up (inside the machine during operation) or down (outside the machine during operation).
AM15, AM15F and AM15T dishwashers are designed to operate in one of two modes: Hot water sanitizing mode (designated by the letters "AH" or "AP" on the display when the machine is turned on), or a chemical sanitizing mode (designated by the letters "AC" on the display when the machine is turned on).
The serial number can be found on the machine data plate located on the bottom of the front panel.
DO NOT attempt to operate this dishwasher in the chemical sanitizing mode without a properly installed, NSF-certified, chemical sanitizer feeder (not supplied with machine). Contact an authorized detergent representative for information about a chemical sanitizer feeder.
The pump motor is rated 2 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.
The unit, once turned on, will fill the wash tank to the appropriate level and automatically stop filling once the level is reached.
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.
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 may not require individual venting of the machine if the room is amply exhausted. Refer to pages 10 and 11 for venting and hood requirements. Verify with local codes for final authority.
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INSTALLATION

UNPACKING
Immediately 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 days of delivery.
Prior to installation, test the electrical service to make sure it agrees with the specifications on the machine data plate; this includes the optional electric booster, if equipped. The dishwasher data plate is located at the bottom of the front panel.
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 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).
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 door.
The dishwasher must be level before any connections are made. Turn the threaded feet (Fig. 2) as required to level the machine and adjust to the desired height.
The edge of dish table that overhangs the AM15 wash tank should be turned down and fitted over the top of the dishwasher tank (Fig. 3). Apply an NSF approved sealant between the overhang of the dish table and the inner wall of the wash tank to prevent leakage (Fig. 3). Fasten the dish tables to the inner wall of the wash tank with non-rusting truss head screws or rivets (Fig. 3).
For straight-through installations, clearance at the front and 15 inches out from the dishwasher at the right side by 27 inches above the finished floor must be provided for servicing.
WASH TANK
DISH TABLE
Fig. 3
MACHINE LEG
ADJUSTABLE FOOT
DISH TABLE
NUT
DISH TABLE
MACHINE SCREW OR RIVET
SEALANT
INNER WALL OF WASH TANK
STRAIGHT-THROUGH OPERATION SHOWN
Fig. 2
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CORNER INSTALLATION
Before placing the dishwasher in its operating location, check machine configuration. If the machine is being installed in a corner (Figs. 4, 5), clearances of 20 inches out from the dishwasher under the left-hand tabling by 27 inches above the finished floor and 15 inches out from the dishwasher at the right side by 27 inches above the finished floor must be provided for servicing. For proper installation of a corner machine, the control and display should be positioned at the front corner for operator access (Fig. 5).
For corner installation, rotate the rack track so the guide rail is positioned on the left side (Fig. 6). For corner machines, remove the front door deflector (unscrew three bolts / nuts, Fig. 7).
WASH TANK
CORNER OPERATION SHOWN
Fig. 4 Fig. 5
DISH TABLE
DISH TABLE
MACHINE SCREW OR RIVET
SEALANT
INNER WALL OF WASH TANK
NUT
CONTROLS MUST BE ACCESSIBLE AT FRONT CORNER.
DISH TABLE
GUIDE RAIL
RACK TRACK
FRONT DEFLECTOR
Fig. 6 Fig. 7
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A splash shield is available (at extra cost) for corner installations to cover the left side opening to the wall. Install the splash shield on the left side using the two lockwasher and nut for each (Fig. 8) and using the two
1
/4-20 bolts, lockwashers and nuts on the left front
1
/4-20 studs on the left rear corner with a
corner (fasteners are provided in the kit). For corner installations, tabling with backsplashes over 6" high require that a notch be provided to
prevent interference with the door mechanism (Fig. 9).
STUDS
BOLTS
A NOTCH MUST BE ADDED TO BACKSPLASHES OVER 6" HIGH ON CORNER MACHINES TO PREVENT INTERFERENCE WITH DOOR MECHANISM. NOTCH MUST EXTEND 5" FROM FACE OF THE MACHINE.
Fig. 8 Fig. 9
WATER REQUIREMENTS
Proper water quality can improve warewashing performance by reducing spotting, lowering chemical supply costs, improving productivity 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 to 6 grains of hardness per gallon. Chlorides must not exceed 50 parts per million. Water hardness above 6 grains per gallon should be treated by 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 the need for deliming 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 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 your Hobart Service office for specific recommendations.
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PLUMBING CONNECTIONS WARNING:
PLUMBING CONNECTIONS MUST COMPLY WITH APPLICABLE SANITARY, SAFETY
AND PLUMBING CODES.
DRAIN CONNECTION
1
The drain connection is a 1
/2" externally threaded pipe connected straight down from the bottom of the wash tank (Fig. 10). The connection can be made in any direction by using the proper fitting (not supplied) and routing to the appropriate drain line.
DRAIN
If a grease trap is required by code, it should have a minimum flow capacity of 38 gallons per minute.
Fig. 10
WATER CONNECTION
A suitable water hammer arrestor should be installed in the water line just ahead of the dishwasher.
Without Electric Booster Water Heater
The water supply line is connected to the line strainer (top rear, Fig. 1) with
3
/4" pipe. A manual shutoff
valve and pipe union are required (not supplied).
REQUIRED INCOMING WATER TEMPERATURE
Model Sanitizing Mode Water Supply
Minimum Temperature Recommended Temperature
Without Built-in Booster Hot Water Sanitizing 180°F Without Built-in Booster Chemical Sanitizing 120°F (49°C) 140°F (60°C)
With Built-in Booster Hot Water Sanitizing 110°F (43°C) 140°F (60°C)
(82°C) 180°F (82°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 (not installed) for verification of proper water pressure. The water pressure is monitored when the solenoid valve is open and water is flowing.
With Electric Booster Water Heater
The water supply line is connected below the booster with the line strainer (supplied) and
3
/4" pipe. A
manual shut off valve and pipe union are required (not supplied). The water supply should have a minimum temperature of 110°F, and a flowing pressure of 20 ± 5 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 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.
Incoming water temperature below 110°F may require longer wash cycle time than the 57 second cycle; refer to OPERATION, pages 17 – 18.
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. A small amount of water will likely dribble out of the lower rinse arm into the tank between cycles due to the natural expansion of water as it is being heated.
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