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

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AM SELECT

MODELS

 

AM15

ML-130038

AM15F

ML-130045

AM15T

ML-130039

701 S. RIDGE AVENUE

TROY, OHIO 45374-0001

937 332-3000

www.hobartcorp.com

FORM 35320 Rev. B (Feb. 2005)

 

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

Fig. 1

© HOBART CORPORATION, 2004

– 2 –

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 leftand 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.

DISH TABLE

WASH TANK

DISH TABLE

 

DISH TABLE

 

MACHINE SCREW

 

OR RIVET

MACHINE LEG

SEALANT

 

 

INNER WALL OF

 

WASH TANK

 

NUT

STRAIGHT-THROUGH OPERATION SHOWN

ADJUSTABLE FOOT

Fig. 3

Fig. 2

– 5 –

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

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

DISH TABLE

DISH TABLE

MACHINE SCREW

OR RIVET

SEALANT

INNER WALL OF

WASH TANK

NUT

CONTROLS MUST BE ACCESSIBLE

AT FRONT CORNER.

DISH TABLE

CORNER OPERATION SHOWN

Fig. 4

Fig. 5

 

 

RACK TRACK

GUIDE RAIL

 

 

 

 

FRONT DEFLECTOR

Fig. 6

Fig. 7

– 6 –

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 1/4-20 studs on the left rear corner with a lockwasher and nut for each (Fig. 8) and using the two 1/4-20 bolts, lockwashers and nuts on the left front 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.

– 7 –

PLUMBING CONNECTIONS

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

DRAIN CONNECTION

 

The drain connection is a 11/2" 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

DRAIN

(not supplied) and routing to the appropriate drain line.

 

If a grease trap is required by code, it should have a minimum flow

Fig. 10

capacity of 38 gallons per minute.

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 (82°C)

180°F (82°C)

 

 

 

 

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)

 

 

 

 

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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