Hobart ML-110974, ML-110975, AM14TC, AM14F, ML-110973 User Manual

MODEL AM14F, AM14T, & AM14TC
DISHWASHERS

MODELS

AM14F ML-110975
AM14T ML-110973
AM14TC ML-110974

701 S. RIDGE AVENUE

TROY, OHIO 45374-0001

937 332-3000

www.hobartcorp.com

FORM 34555 (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

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TABLE OF CONTENTS

GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

UNPACKING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

INSTALLATION CODES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

LOCATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

WATER REQUIREMENTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

PLUMBING CONNECTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

DRAIN CONNECTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

WATER CONNECTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Without Electric or Gas Booster Water Heater . . . . . . . . . . . . . . . . . . . . . . . . . 7

With Electric Booster Water Heater . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

GAS TANK HEAT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

VENTING REQUIREMENTS — WITH GAS TANK HEAT . . . . . . . . . . . . . . . . 9

RATE OF EXHAUST FLOW CALCULATIONS . . . . . . . . . . . . . . . . . . . . . . . . 10

ELECTRICAL CONNECTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Dishwasher . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Check Rotation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Electric Booster Water Heater . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

OPTIONAL EQUIPMENT CONNECTIONS — Vent Fan and Gas Booster . . . . . 12

Vent Fan Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Hobart Infrared Booster Gas Water Heater . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

DETERGENT, RINSE AID, OR SANITIZER DISPENSERS — Tubing Installation 13

Detergent Dispenser . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Rinse Aid Dispenser . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Chemical Sanitizer Dispenser . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

OPTIONAL EQUIPMENT CONNECTIONS — Detergent, Rinse Aid, Sanitizer . . 14

Detergent Dispenser . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Rinse Aid and/or Sanitizer Dispenser . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

PREPARATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

FILLING THE WASH TANK . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

DISHWASHING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

CLEANING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

DOs AND DON’Ts FOR YOUR NEW HOBART WAREWASHER.. . . . . . . . . . . . . . . . 17

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

Wash Arms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

Motor(s) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

Gas Flue . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

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

Manual Reset Button on Pump Motor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

SERVICE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

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Installation, Operation, and Care of

MODEL AM14F, AM14T, AM14TC DISHWASHERS

SAVE THESE INSTRUCTIONS

GENERAL

The AM14T, AM14TC, and AM14F dishwashers are semi-automatic rack-type machines. On model
AM14T (Fig. 1) the doors open on opposite sides of the machine allowing the rack to move straight
through. Model AM14TC can be located in a corner; adjacent doors open so the rack moves in and
out at a 90° angle. Model AM14F (Fig. 1) uses its pull-down front door for loading or unloading a rack
of dishes or utensils.

The AM14T, AM14TC, and AM14F dishwashers are designed to operate in one of two modes: Hot
water sanitizing mode (designated by 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 AM14T Model AM14TC Model AM14F

with Booster Heater shown

Fig. 1

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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 2

HP 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 accessory is the model IB57 Infrared Booster Gas Water Heater.

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 which includes the optional electric booster, if equipped. Data plate for AM14T and
AM14TC is located on the side of the control box. For AM14F, the data plate is located on the control
box mounting bracket.

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

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 (if
applicable), tabling (if needed), chemical feeder replenishment (if applicable), and adequate clearance
for opening the doors.

5

On models AM14T and AM14TC, the control box (Fig. 1) is mounted 4

1

shipped from the factory. It can be changed to 11

/8" or 5/8" below the dish table by removing the two

/8" below the dish table when

mounting bolts and reinstalling them in the holes provided.

The dishwasher must be level before any connections are made. Turn the threaded feet
(Fig. 1) as required to level the machine and adjust to the desired height.

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On models AM14T and AM14TC, dish tables should be turned
down and fitted into the dishwasher (Fig. 2). Use an NSF
approved sealer between table and tank lip to prevent leakage.
Fasten the tables to the tank lip with truss head screws. Dish
tables are not required with model AM14F.

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 9
and 10 for venting and hood requirements.

Fig. 2

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 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 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.

PLUMBING CONNECTIONS

WARNING:

AND PLUMBING CODES.

PLUMBING CONNECTIONS MUST COMPLY WITH APPLICABLE SANITARY, SAFETY,

DRAIN CONNECTION

The drain connection is made using 2" pipe.

If a right hand drain is desired on a machine with electric heat, it can be changed from the standard
left-hand by removing the pipe plug from the drain valve and reinstalling it in the opposite end of the
drain valve. Machines with gas heat must have the drain 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.

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