Hobart AM3 Installation And Operation Manual

AM3 Dishwasher installation and

operation manual

Hobart Food Equipment Co., Ltd.

FORM 743423-2E

TABLE OF CONTENTS

GENERAL……………………………………………………………1

INSTALLATION……………………………………………………2

Location……………………………………………………………………………2

Convert from straight-through to corner operation………………………3

Electrical connections……………………………………………………………4

Plumbing connections……………………………………………………………6

OPERATION………………………………………………………7

Controls……………………………………………………………………………7

Preparation…………………………………………………………………………7

Dishwashing………………………………………………………………………8

MAINTENANCE……………………………………………………9

MACHINE CLEANING……………………………………………9

TROUBLESHOOTING……………………………………………10

Appendix 1: Circuit Diagram

Appendix 2: Electrical Wiring Connection Layout

Appendix3: Installation guide

Appendix4: Control board chart

AM3 Dishwasher Installation & Operation Manual

Installation, Operation, and Maintenance of

AM3 DISHWASHERS

SAVE THESE INSTRUCTIONS

GENERAL

The AM3 dishwashers are semi-automatic rack-type machines. Three doors open at the same
time to allow the rack to be pushed in or out. After filling, an automatic wash and rinse cycle
begins when the door is lowered.

Dish table heights may be specified at time of order for 800mm (31.5 inches) or 860mm (33.875
inches).

Electric booster heat options (7kW or 14kW) include an open vented booster tank supplied with a
solenoid valve, line strainer, rinse pump and type “A” air gap. Low water protection is provided in
the boosters. No booster versions are also available for connection to external heating.

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AM3 Dishwasher Installation & operation Manual

INSTALLATION

Before installing, check the electrical service to be sure it agrees with the electrical specifications
on the data plate located on the right side of machines.

Immediately after unpacking, check for possible shipping damage. If the dishwasher is found to
be damaged, save the packaging material and contact the carrier or supplier within 15 days of
delivery.

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
booster location (if applicable), tabling, chemical feeder replenishment (if applicable), daily
cleaning, maintenance and adequate clearance for opening the doors (Fig. 1).

WALL

WALL

THE SPACE BETWEEN WALL AND MACHINE IS AT LEAST 100 MM

DISH TABLE

DRAIN

FILL HOSE

Fig1

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AM3 Dishwasher Installation & Operation Manual

The dishwasher must be level before any connections are made. Turn the leveling feet as
required to level the machine and adjust to the desired height.

Dish table should be turned down and fitted into the dishwasher (Fig.2). Use a suitable sealer
between table and tank lip to prevent leakage.

A hood or vent may be required in order to meet local codes. The ventilation volume should be
more than 2.8m3/min in case of using hood or vent (supplied by others).

SEAL TO PREVENT

LEAKAGE

DISH TABLE

Fig. 2

CONVERT FROM STRAIGHT-THROUGH TO CORNER OPERATION

For corner operation, remove the rack guide and baffle (Fig.3) from the front, assemble the rack
guide on the side and use screws to re-install the baffle in the front.

STRAIGHT-THROUGH

CORNER

RE-INSTALL
BAFFLE HERE

RACK GUIDE

Fig. 3

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AM3 Dishwasher Installation & operation Manual

ELECTRICAL CONNECTIONS

 WARNING： ELECTRICAL AND GROUNDING CONNECTIONS MUST COMPLY WITH

APPLICABLE PORTIONS OF THE NATIONAL ELECTRICAL CODE AND/OR OTHER
LOCAL CODES.

 WARNING: DISCONNECT THE ELECTRICAL POWER SUPPLY AND PLACE A TAG AT

THE DISCONNECT SWITCH INDICATING THAT YOU ARE WORKING ON THE CIRCUIT.

Refer to the electrical diagram on the inside of side panel. Connect the electrical supply wires
with different colors to terminal block (Fig. 4).

Electrical Data

No Booster

7KW Electrical

Booster

14KW Electrical

Booster

Min. Circuit

Ampacity / Max.

Protective Device

Min. Circuit

Ampacity / Max.

Protective Device

Min. Circuit

Ampacity / Max.

Protective Device

Volts / Hz / Ph

AMPS AMPS AMPS

100/50/1 60

100/60/1 60

220/50/1 25

220/60/1 25

240/50/1 25

200/50/3 15 30 50

200/60/3 15 30 50

220/60/3 15 40 60

380/60/3 15 25 40

380～415/50/3 15 25 40

RPS1

RPS2

DPS1

DPS2

2FU

1FU

3FU

L1L3NL2

Fig. 4

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AM3 Dishwasher Installation & Operation Manual

CHECK ROTATION (Three-Phase Machines Only)

Three phase motors must rotate in the direction of the arrow on the pump housing
(counterclockwise). If the rotation is incorrect, DISCONNECT ELECTRICAL POWER SUPPLY
and interchange any two of the incoming power supply leads. Re-energize the dishwasher and
verify correct rotation.

 Warning: The rotation of motors must be checked again before the first operation.

In-correct rotation could cause improperly operation of dishwasher and damage of
wash pump even in short period of time.

Power Supply for Detergent Dispenser and/or Rinse/Sanitizer Feeder (by others)

Terminals DPS1 and DPS2 in the control box allow connection of a detergent dispenser (by
others). RPS1 and RPS2 terminals allow connection of a rinse/sanitizer feeder (by others) with
maximum current of 3 Amps (Fig. 4). DPS1-DPS2 is powered during the wash cycle;
RPS1-RPS2 is powered during the rinse cycle. Refer to the electrical diagram on the inside of
side panel.

 Note 1: All connecting wires must accommodate the movement of the control box as it

slides out for service.

 Note 2：All wires must be 600 volts insulation cable; do not use normal low voltage cable.

Cycle Timing Data

Whole Cycle（s） 60 90 120

Wash（s） 44/47 74/77 104/107

Dwell（s） 4 4 4

Rinse（s） 12/9 12/9 12/9

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AM3 Dishwasher Installation & operation Manual

PLUMBING CONNECTIONS

 WARNING: PLUMBING CONNECTIONS MUST COMPLY WITH APPLICABLE

SANITARY, SAFETY, AND PLUMBING CODES.

WATER SUPPLY

Connect the water pipe to the incoming water supply (3/4” NPT internal threads)

INCOMING WATER SUPPLY REQUIREMENTS

TEMPERATURE PRESSURE (Dynamic)

0

C

0

F KPa kg/cm2

With 7KW Electrical Booster 50～60 122～140 29.4～490 0.3～5

With 14KW Electrical Booster 10～60 50～140 29.4～490 0.3～5

 Note: In case of line dynamic pressure is less than 0.3kg/cm

2

，a booster-pump must be

installed (by others); in case of line static pressure is more than 5kg/cm2，a pressure
reducer must be installed (by others).

DRAIN

Connect the 1

1/4” NPT drain connector under the wash tank to a suitable drain. If a grease trap is

required by code, it should have a minimum flow capacity of 95.5 liters per minute (21 gallons per
minute).

RINSE AGENT CONNECTION

Remove front panel to locate rinse agent connection
points. Two connecting points for rinse agent are
provided. One is located at the upper right side of booster
and allows rinse agent to inject into the booster tank.
Another is located under the booster tank near the rinse
pump outlet and allows rinse agent to inject into the rinse
pipe. Select a suitable point according to the chemical
requirement. Use a spanner to loosen the plug and
connect rinse agent pipe with a suitable sealing material
(Fig. 5).

G1/8" INTRERNA

L

THREADS

G1/8" INTERNAL
THREADS

Fig. 5

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