Duke ADI-1E-SW Service Manual

ELECTRIC
SEALED WELL
FOOD WARMERS

MODELS

THURMADUKE STEAM TABLES

THURMADUKE SERVING SYSTEMS

AEROHOT SEALED WELL MODELS

AEROSERV SERVING SYSTEMS

Service Manual

HERITAGE HOT FOOD ELECTRIC BUFFET

NEXT GENERATION ELECTRIC HOT FOOD
SERVING SYSTEMS

Please read this manual completely before attempting

to install, operate or service this equipment

This document is prepared for trained Duke service technicians. It is not to be used by anyone not
properly qualied to perform these procedures.

This Service Manual is not all encompassing. If you have not been trained on servicing this product,
be sure to read the manual completely before attempting servicing. Be sure all necessary tools, test
equipment, and skills are available. Those procedures for which you do not have the proper skills
and test equipment must be performed only by a qualied Duke trained service technician.

Written consent from Duke is required to reproduce any portion of this Manual. Unauthorized
reproduction is prohibited.

Duke Manufacturing Company

Broadway • St. Louis, MO 63102

800.735.3853 • 314.231.1130

www.dukemfg.com

P/N 219219B

Service Manual for Electric Sealed Well Food Warmers

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

DO NOT OPERATE THIS EQUIPMENT WITHOUT PROPERLY PLACING AND
SECURING ALL COVER AND ACCESS PANELS.

CAUTION

Observe the following:

• Provide and maintain adequate minimum clearances from all walls and combustible materials.

• Provide and maintain adequate clearance for air openings.

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

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

• Retain this manual for future reference.

2

Service Manual for Electric Sealed Well Food Warmers

TABLE OF CONTENTS

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

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

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

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

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

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

PARTS REPLACEMENT .................................................................................................... 5

Innite Switch Replacement ........................................................................................... 5

Aerohot Sealed Well Models, AeroServ Serving System, Heritage Hot Food

Electric Buffet and Next Generation Electric Hot Food Serving System ................... 5

Aerohot ADI1SW through ADI5SW Models ............................................................... 6

Electronic Thermostat Replacement .............................................................................. 6

Aerohot ASI1SW through ASI5SW Models ............................................................... 6

Thurmaduke Steam Tables and Thurmaduke Serving Systems ............................... 7

Indicator Lamp Replacement ......................................................................................... 8

Power Toggle Switch Replacement – Thurmaduke Models ........................................... 9

Element Replacement .................................................................................................... 9

Hi-Limit Thermostat Replacement ............................................................................... 10

Carving Board Shelf Replacement ................................................................................11

Caster Replacement – Thurmaduke Serving System, AeroServ and

Heritage Models ...................................................................................................... 12

Push Bar Replacement – Thurmaduke Serving System .............................................. 12

Master Drain Valve Replacement ................................................................................ 13

SERVICE INFORMATION ................................................................................................ 15

Troubleshooting Procedure .......................................................................................... 15

MAINTENANCE ............................................................................................................... 16

Stainless Steel Care and Cleaning .............................................................................. 16

Care and Cleaning – Painted and Powder Coated Units ............................................. 16

SCHEMATICS .................................................................................................................. 17

3

Service Manual for Electric Sealed Well Food Warmers

SPECIFICATIONS

MODEL DESCRIPTION VOLTAGE SIZE

E302SW – E305SW Aerohot Sealed Well 115VAC, 208VAC & 236VAC Variable 2 well to 5 well

ADI1ESW – ADI5ESW Aerohot Drop-in Sealed Well 115VAC, 208VAC & 236VAC Variable 1 well to 5 well

ASI1ESW – ASI5ESW Aerohot Slide-in Sealed Well 115VAC, 208VAC & 236VAC Variable 1 well to 5 well

E-2-CBSS – E-6-CBSS Stainless Steel Thurmaduke 115VAC, 208VAC & 236VAC Variable 2 well to 6 well

E-2-CBPG – E-6-CBPG Painted Thurmaduke 115VAC, 208VAC & 236VAC Variable 2 well to 6 well

E302-25 – E305-25 AeroServ Serving System 115VAC, 208VAC & 236VAC Variable 2 well to 5 well

HB2HF – HB5HF Heritage Buffet 115VAC, 208VAC & 236VAC Variable 2 well to 5 well

TEHF-32 – TEHF88 Thurmaduke Serving System 115VAC, 208VAC & 236VAC Variable 2 well to 6 well

NG32HF – NG74HF Next Generation Hot Food 115VAC, 208VAC & 236VAC Variable 2 well to 5 well

INSTALLATION

Location

The food warmers represented in this manual are
intended for indoor use only. Be sure the chosen
location has a oor strong enough to support
the total weight of the unit fully loaded with food
product. Reinforce the oor (stationary units) or
cabinet (drop-in or slide-in units) if necessary to
provide for maximum loading. Portable units (units
with optional casters) should be placed on a level
surface capable of supporting the unit’s fully loaded
weight. For the most efcient operation, be sure to
provide good air circulation inside and out.

Leveling

Be sure oor 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 the unit
accordingly using the leg adjusters.

Make sure the top of the cabinet is level before
installing Aerohot drop-in or slide-in units. It may
be necessary to shim the unit or cabinet to make
it level.

Stabilizing

Use the leg adjustments to ensure that the unit
is solid to the oor surface at all contact points.
Ensure that the unit does not rock when pressure
is applied to the top corners. Units with casters
will require spacers to make them level on uneven

surfaces. The spacers should be placed under the
locking casters for maximum stability. Casters must
be locked when the unit is in service.

Electrical Connection

The Electric Sealed Well Food Warmers are
available as 115VAC, 208VAC, or 236VAC,
50/60 Hz. Portable units are available with a
properly rated and wired cord. Direct wiring of
units to the power supply must be performed by
a certied electrician and must 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.

4

PARTS REPLACEMENT

D1022

D1023

Knob
Guard

Locking
Nut

Infinite
Switch

D1024

WARNING

ALWAYS DISCONNECT THE UNIT

FROM ITS POWER SOURCE BEFORE

SERVICING.

INFINITE SWITCH REPLACEMENT

Aerohot Sealed Well Models, AeroServ
Serving System, Heritage Hot Food Electric
Buffet and Next Generation Electric Hot
Food Serving System

Service Manual for Electric Sealed Well Food Warmers

Figure 2. Removing bottom cover

2. Remove the screws that hold the bottom cover
in place (see Figure 2).

Figure 1. Location of Innite Switch

Innite switches are located on the operator’s side
of the unit. Each switch is located directly below its
corresponding pan. Figure 1 depicts the location
of the switches on most sealed well units.

3. Slide the bottom cover toward the back of the
unit. Provide support for it to prevent damage
to the wiring harness.

Note: Tag the power cable wires and disconnect
them. Doing this allows for complete removal of
the bottom cover.

1. Disconnect unit from power source.

Figure 3. View of innite switch wiring.

4. Tag and disconnect the innite switch wiring.
An example of the innite switch wiring is seen
in Figure 3.

5

Service Manual for Electric Sealed Well Food Warmers

Remote Infinite Switch

D1025

Thermostats

D1026

5. Remove the knob.

6. Remove the two screws that secure the innite
switch to the panel.

7. Remove the switch from the back of the
panel.

8. Install replacement innite switch, mounting
screws and knob.

9.

Reference the tags to reconnect the wires to

the innite switch.

10.

Reconnect the power wiring and reinstall the

bottom cover.

11.

Connect the unit to its power source.

Aerohot ADI1SW through ADI5SW Models

5. Tag and disconnect the innite switch wiring.
Wiring is depicted in Figure 3.

6. Remove the knob.

7. Remove innite switch mounting screws.

8. Remove the innite switch from the remote
control panel.

9. Install replacement innite switch, mounting
screws and knob.

10.

Reference the tags to reconnect the wires to

the innite switch.

11.

Reinstall the back cover of the remote innite

switch control.

12.

Reconnect the power wires and reinstall the

unit into the cabinet.

13.

Connect the unit to its power source.

THERMOSTAT REPLACEMENT

Aerohot ASI1SW through ASI5SW Models

Figure 4. Location of Innite Switch –

Innite switches are located in a separate control
panel that is mounted to the front of the cabinet.
Figure 4 depicts an uninstalled ADI unit with the
remote innite switch control panel.

1. Disconnect unit from power source.

2. Remove the screws that hold the unit and
its remote innite switch controller in the
cabinet.

3. Pull the remote innite switch controller out of
the cabinet for servicing.

4. Remove screws holding the back cover of the
remote innite switch control panel in place.

6

Aerohot Drop-in (ADI) models

Figure 5.

Location of Thermostat –

Aerohot

Slide-in (ASI) models

Thermostats are located in front on the control
panel below each pan. Figure 5 depicts the location
of the thermostat.

1. Disconnect the unit from its power source.

2. Slide the unit out of its cabinet.

3. Turn the unit upside down and remove the
screws that hold the bottom cover in place.