Duke RB 72 Service Manual

REFRIGERATED BASE

Service Manual

MODEL
RB 72

Please read this manual completely before attempting to

install, operate or service this equipment

This manual is Copyright © 2011 Duke Manufacturing Company. All rights reserved.

Reproduction without written permission is prohibited. Duke is a registered

trademark of the Duke Manufacturing Company.

Duke Manufacturing Company

2305 N. Broadway

St. Louis, MO 63102

Phone: [phone]

Toll Free: 1-800-735-3853

Fax: [phone]

www.dukemfg.com

P/N 219207C

Service Manual for Refrigerated Base Model RB 72

IMPORTANT WARNING AND SAFETY INFORMATION

WARNING

READ THIS MANUAL THOROUGHLY BEFORE OPERATING, INSTALLING, OR PERFORM­ING MAINTENANCE ON THE EQUIPMENT.

WARNING

FAILURE TO FOLLOW INSTRUCTIONS IN THIS MANUAL CAN CAUSE PROPERTY
DAMAGE, INJURY OR DEATH.

WARNING

DO NOT STORE OR USE GASOLINE OR OTHER FLAMMABLE VAPORS OR LIQUIDS
IN THE VICINITY OF THIS OR ANY OTHER APPLIANCE.

WARNING

UNLESS ALL COVER AND ACCESS PANELS ARE IN PLACE AND PROPERLY SE­CURED, DO NOT OPERATE THIS EQUIPMENT.

CAUTION

Observe the following:

• Minimum clearances must be maintained from all walls and combustible materials.

• Keep the equipment area free and clear of combustible material.

• Adequate clearance for air openings.

• Operate equipment only on the type of electricity indicated on the specication plate.

• Retain this manual for future reference.

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Service Manual for Refrigerated Base Model RB 72

CONTENTS

SPECIFICATIONS ...............................................................................................................................4

INSTALLATION ...................................................................................................................................4

Location .......................................................................................................................................4

Inside Unit ....................................................................................................................................4

Outside Unit .................................................................................................................................4

Leveling .......................................................................................................................................4

Stabilizing ....................................................................................................................................4

Electrical Connection ...................................................................................................................4

MAINTENANCE ..................................................................................................................................5

Stainless Steel Care and Cleaning ..............................................................................................5

PREVENTIVE MAINTENANCE ...........................................................................................................6

Cleaning the Condenser Coil .......................................................................................................6

Door Gasket Maintenance ...........................................................................................................6

Drain Maintenance – Base ..........................................................................................................7

PARTS REPLACEMENT .....................................................................................................................7

Thermostat Replacement ............................................................................................................7

Evaporator Fan Replacement ......................................................................................................8

Refrigeration System Replacement .............................................................................................8

Door and Hinge Replacement .....................................................................................................9

Door Gasket Replacement ..........................................................................................................9

Recharging Refrigeration System ................................................................................................9

Tools ............................................................................................................................................9

Charging Procedure ....................................................................................................................9

Heater Thermostat Replacement...............................................................................................10

Heating Element Replacement ..................................................................................................10

TROUBLESHOOTING ......................................................................................................................11

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Service Manual for Refrigerated Base Model RB 72

SPECIFICATIONS

MODEL DESCRIPTION VOLTAGE AMPS PH.

RB 72 72” Refrigerated 120 VAC (60 Hz) 8.8 1
Base 220 VAC (50 Hz) 4.4 1

MODEL DESCRIPTION HEIGHT WIDTH LENGTH

RB 72 72” Refrigerated 38.00 In. 33.50 In. 72.00 In.

Base

INSTALLATION

Location

The unit represented in this manual is intended
for indoor use only. Be sure the chosen location
has a oor or counter strong enough to support
the total weight of the unit. Reinforce the oor
or counter if necessary to provide for maximum
loading. For the most efcient operation, be sure
to provide good air circulation inside and out.

The outline dimensional drawing for the unit is
shown below in Figure 1.

Outside Unit

Be sure that the unit has access to ample air;
avoid hot corners and locations near stoves and
ovens.

Leveling

Be sure that the units are placed on a rm, at
surface/oor. Check for cracks in ooring or tile
and avoid these areas if possible. If necessary
place support pads, properly rated for the weight
of the unit, to “bridge” uneven or cracked ooring.
Level unit accordingly.

Stabilizing

Use the leg adjustments to insure that the unit is
solid to the oor surface at all six contact points.
Insure that the unit does not “rock” when pressure
is applied to the top corners.

Electrical Connection

Figure 1

72” Refrigerated Base (RB 72)

Inside Unit

Provide adequate space along the front, back and
sides taking care to not block airow to the fans.

The RB 72 is available as a 120VAC, 60 Hz or
as a 220VAC, 50 Hz dependent on model. All
electrical connections should be performed by a
certied electrician and should comply with local
electrical codes for your municipality.

WARNING

REFER TO THE AMPERAGE DATA
LIST IN THE SPECIFICATIONS OR
THE SERIAL TAG DATA AND YOUR
LOCAL CODE OR THE NATIONAL
ELECTRICAL CODE TO BE SURE UNIT
IS CONNECTED TO THE PROPER
POWER SOURCE. A PROTECTED
CIRCUIT OF THE CORRECT VOLTAGE
AND AMPERAGE MUST BE RUN FOR
CONNECTION OF THE SUPPLY CORD
OR PERMANENT CONNECTION TO THE
UNIT. THE POWER MUST BE TURNED
OFF AND DISCONNECTED WHENEVER
PERFORMING MAINTENANCE OR RE­PAIR FUNCTIONS.

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