Middleby Marshall 60254 User Manual

PS740 Series
Electric
Domestic & Std. Export
ENGLISH

P/N 60254

September 28, 2012

PS740 Series Electric Ovens

Model:

• PS740EElectric

Combinations:

• SingleOven

• DoubleOven(Two-Stack)

• TripleOven(Three-Stack)

OWNER'S OPERATING AND
INSTALLATION MANUAL

for domestic and standard export ovens

©2012 Middleby Marshall Inc.

is a registered trademark of Middleby Marshall, Inc. All rights reserved.

Middleby Cooking Systems Group • 1400 Toastmaster Drive • Elgin, IL 60120 • [phone] • FAX [phone]

NOTICE:

This Owner's Operating and Installation Manual should be given to the user. The operator of the oven should be

familiar with the functions and operation of the oven.

This manual must be kept in a prominent, easily reachable location near the oven.

It is suggested to obtain a service contract with a Middleby Marshall Authorized Service Agent.

WARNING

FOR YOUR SAFETY, DO NOT STORE OR USE GASOLINE OR OTHER FLAMMABLE VAPORS

AND LIQUIDS IN THE VICINITY OF THIS OR ANY OTHER APPLIANCE.

WARNING

Improper installation, adjustment, alteration, service, or maintenance can cause

property damage, injury, or death. Read the installation, operation, and maintenance instruc-

tions thoroughly before installing or servicing this equipment.

IMPORTANT

An electrical wiring diagram for the oven is located inside the machinery compartment.

IMPORTANT

It is the customer’s responsibility to report any concealed or non-concealed damage to the

freight company. Retain all shipping materials until it is certain that the equipment has

not suffered concealed shipping damage.

NOTICE

CONTACT YOUR MIDDLEBY MARSHALL AUTHORIZED SERVICE AGENT TO PERFORM MAIN-

ENANCE AND REPAIRS. AN AUTHORIZED SERVICE AGENCY DIRECTORY IS

SUPPLIED WITH YOUR OVEN.

NOTICE

Using any parts other than genuine Middleby Marshall factory manufactured parts relieves the

manufacturer of all warranty and liability.

NOTICE

Middleby Marshall (Manufacturer) reserves the right to change specications at any time.

NOTICE

The equipment warranty is not valid unless the oven is installed, started and demonstrated under the

supervision of a factory certied installer.

NOTICE

A Middleby Marshall certied installer must be used to install and service this appliance.

NOTICE

This equipment is only for professional use and shall be used by qualied people.

RETAIN THIS MANUAL FOR FUTURE REFERENCE.

Middleby Cooking Systems Group • 1400 Toastmaster Drive • Elgin, IL 60120 USA • [phone] • FAX [phone]

www.middleby.com

IIP/N60254September28,2012

Model No.
Modéle No.

Serial No.
Serié No.

Installation Date
Date d'installation

MIDDLEBY MARSHALL

No Quibble limited WarraNty

(U.S.A. Only)

MIDDLEBY MARSHALL, HEREINAFTER REFERRED TO
AS “THE SELLER”, WARRANTS EQUIPMENT MANUFAC­TURED BY IT TO BE FREE FROM DEFECTS IN MATERIAL
AND WORKMANSHIP FOR WHICH IT IS RESPONSIBLE.
THE SELLER’S OBLIGATION UNDER THIS WARRANTY
SHALL BE LIMITED TO REPLACING OR REPAIRING,
AT SELLER’S OPTION, WITHOUT CHARGE, ANY PART
FOUND TO BE DEFECTIVE AND ANY LABOR AND MATE­RIAL EXPENSE INCURRED BY SELLER IN REPAIRING
OR REPLACING SUCH PART. SUCH WARRANTY SHALL
BE LIMITED TO THE ORIGINAL PURCHASER ONLY
AND SHALL BE EFFECTIVE FOR A PERIOD OF ONE
YEAR FROM DATE OF ORIGINAL INSTALLATION, OR 18
MONTHS FROM DATE OF PURCHASE, WHICHEVER IS
EARLIER, PROVIDED THAT TERMS OF PAYMENT HAVE
BEEN FULLY MET.

This warranty is valid only if the equipment is installed,
started, and demonstrated under the supervision of a factory-

authorized installer.

Normal maintenance functions, including lubrication, clean­ing, or customer abuse, are not covered by this no quibble
warranty.

Seller shall be responsible only for repairs or replacements of
defective parts performed by Seller’s authorized service per­sonnel. Authorized service agencies are located in principal

cities throughout the contiguous United States, Alaska, and
Hawaii. This warranty is valid in the 50 United States and

is void elsewhere unless the product is purchased through
Middleby International with warranty included.

The foregoing warranty is exclusive and in lieu of all
other warranties, expressed or implied. There are no

implied warranties of merchantability or of tness for a

particular purpose.

The foregoing shall be Seller’s sole and exclusive obliga­tion and Buyer’s sole and exclusive remedy for any action,

including breach of contract or negligence. In no event shall

Seller be liable for a sum in excess of the purchase price of

the item. Seller shall not be liable for any prospective or lost

prots of Buyer.

This warranty is effective on Middleby Marshall equip­ment sold on, or after, February 15, 1995.

MIDDLEBY MARSHALL INC.

OVEN LIMITED WARRANTY

(Non U.S.A.)

The Seller warrants equipment manufactured by it to be free from
defects in material and workmanship for which it is responsible. The

Seller’s obligation under this warranty shall be limited to replacing or

repairing, at Seller’s option, without charge, F.O.B. Seller’s factory,
any part found to be defective and any labor and material expense

incurred by Seller in repairing or replacing such part. Such warranty
is limited to a period of one year from date of original installation or

15 months from date of shipment from Seller’s factory, whichever

is earlier, provided that terms of payment have been fully met. All
labor shall be performed during regular working hours. Overtime

premium will be charged to the Buyer.

This warranty is not valid unless equipment is installed,
started, and demonstrated under the supervision of a factory­authorized installer.

Normal maintenance functions, including lubrication, adjustment of

airow, thermostats, door mechanisms, microswitches, burners and

pilot burners, and replacement of light bulbs, fuses and indicating
lights, are not covered by warranty.

Any repairs or replacements of defective parts shall be performed by
Seller’s authorized service personnel. Seller shall not be responsible
for any costs incurred if the work is performed by other than Seller’s
authorized service personnel.

When returning any part under warranty, the part must be intact

and complete, without evidence of misuse or abuse, freight prepaid.

Seller shall not be liable for consequential damages of any kind
which occur during the course of installation of equipment, or which

result from the use or misuse by Buyer, its employees or others of
the equipment supplied hereunder, and Buyer’s sole and exclusive

remedy against Seller for any breach of the foregoing warranty or
otherwise shall be for the repair or replacement of the equipment
or parts thereof affected by such breach.

The foregoing warranty shall be valid and binding upon Seller if and
only if Buyer loads, operates and maintains the equipment supplied

hereunder in accordance with the instruction manual provided to

Buyer. Seller does not guarantee the process of manufacture by
Buyer or the quality of product to be produced by the equipment

supplied hereunder and Seller shall not be liable for any prospective

or lost prots of Buyer.

THE FOREGOING WARRANTY IS EXCLUSIVE AND IN LIEU OF
ALL OTHER EXPRESS AND IMPLIED WARRANTIES WHATSO­EVER. SPECIFICALLY THERE ARE NO IMPLIED WARRANTIES
OF MERCHANTABILITY OR OF FITNESS FOR A PARTICULAR
PURPOSE.

The foregoing shall be Seller’s sole and exclusive obligation and
Buyer’s sole and exclusive remedy for any action, whether in breach

of contract or negligence. In no event shall seller be liable for a sum

in excess of the purchase price of the item.

© 2003 - Middleby Marshall, A Middleby Company.
The Middleby Marshall logo is a registered trademark of Middleby Marshall, A Middleby Company.

Middleby Marshall Inc. • 1400 Toastmaster Drive • Elgin, Illinois 60120-9272 U.S.A. • [phone] • FAX: [phone]

III P/N60254September28,2012

TABLE OF CONTENTS

Page

SECTION 1 – DESCRIPTION ............................................ 1

I. OVEN USES ............................................................. 1

II. OVEN COMPONENTS ............................................. 1

A. Conveyor Motor Drive ................................... 1

B. Crumb Pans .................................................. 1

C. Conveyor ....................................................... 1

D. End Plugs ...................................................... 1

E. Eyebrows ....................................................... 1

F. Window .......................................................... 1

G. Machinery Compartment Access Panel ........ 1

H. Serial Plate .................................................... 1

I. Control Panel ................................................. 1

J. Photo Cell ...................................................... 1

K. Blowers .......................................................... 1

L. Air Fingers ..................................................... 1

III. OVEN SPECIFICATIONS ......................................... 2

A. Dimensions .................................................... 2

B. General Specications .................................. 2

C. Electrical Specications for

PS740 Electric Ovens ................................... 2

SECTION 2 – INSTALLATION .......................................... 3

I. BASE PAD KIT ......................................................... 4

II. INSTALLATION KIT .................................................. 6

III. VENTILATION SYSTEM ........................................ 12

A. Requirements .............................................. 12

B. Recommendations ...................................... 12

C. Other Ventilation Concerns ......................... 12

IV. ASSEMBLY ............................................................ 13

A. Base Pad, Legs, Casters ............................. 13

B. Stacking ....................................................... 14

C. Restraint Cable Installation ......................... 14

D. Conveyor Installation ................................... 15

E. Standoff Installation ..................................... 15

V. FINAL ASSEMBLY ................................................. 16

VI. ELECTRICAL SUPPLY .......................................... 17

Connection ....................................................... 17

UTILITY ROUGH-IN DIMENSIONS AND ...................

POSITIONING FOR PS840-SERIES OVENS................... 18

Circuit Breaker .................................................. 18

ElectricalSpecications.................................... 18

   ElectricalRating............................................... 18

Supply Wire ...................................................... 18

Suggested ........................................................ 18

Page

SECTION 3 – OPERATION ............................................. 19

I. LOCATION AND DESCRIPTION OF CONTROLS 19

II. NORMAL OPERATION, STEP-BY-STEP .............. 20

A. Main Screen ................................................ 20

B. Daily Startup Procedure .............................. 20

C. Daily Shutdown Procedure .......................... 20

III. QUICK REFERENCE: TROUBLESHOOTING ....... 21

IV. SCREEN ALERTS .................................................. 21

SECTION 4 – MAINTENANCE ........................................ 22

I. MAINTENANCE – DAILY ....................................... 22

II. MAINTENANCE – MONTHLY ................................ 23

III. MAINTENANCE – EVERY 3 MONTHS .................. 24

IV. MAINTENANCE – EVERY 6 MONTHS .................. 25

V. KEY SPARE PARTS KIT ........................................ 26

SECTION 5 – TROUBLESHOOTING ............................... 27

SECTION 6 – ELECTRICAL WIRING DIAGRAM ............ 28

WIRING DIAGRAM, 740 Electric Oven, E208/240V,

50/60 Hz, 3 Ph .............................................................. 28

WIRING DIAGRAM, 740 Electric Oven, E380-480V,

50/60 Hz, 3 Ph .............................................................. 29

NOTE

Wiring Diagrams are in Section 6 of this Manual.

The diagram for each oven is also on the lower

inner surface of its Control Console.

IVP/N60254September28,2012

SECTION 1 – DESCRIPTION

I. OVEN USES

PS740 Series Ovens can be used to bake and/or cook a wide
variety of food products, such as pizza, pizza –type products,

cookies, sandwiches and others.

II. OVEN COMPONENTS – see Figure 1-1.

A. Conveyor Drive Motor: Moves the conveyor.

B. Crumb Pans: Catch crumbs and other materials that drop

through the conveyor belt. One crumb pan is located at
each end of the conveyor.

C. Conveyor: Moves the food product through the oven.

D. End Plugs: Allow access to the oven’s interior.

E. Eyebrows: Can be adjusted to various heights to prevent

heat loss into the environment.

F. Window: Allows the user to access food products inside

the baking chamber.

G. Machinery Compartment Access Panel: Allows access

to the oven’s interior and control components. No user ser­viceable parts are located in the machinery compartment.

H. Serial Plate: Provides specications for the oven that affect

installation and operation. Refer to Section 2, Installation
for details.

I. Control Panel: Location of the operating controls for the

oven. Refer to Section 3, Operation, for details.

J. Photo Cell: Turns oven On when beam is interrupted.

Not Shown:

K. Blowers: Project hot air from the heating element to the

air ngers.

L. Air Fingers: Project streams of hot air onto the food product.

Figure 1-1. Oven Components

1 P/N60254September28,2012

I. OVEN SPECIFICATIONS

Table 1-1 Dimensions Single Oven Double Oven Triple Oven

Overall Height 48-3/16″ (1219mm) 62-3/4″ (1575mm) 78-11/16″ (1981mm)

Overall Depth 60″ (1524mm) 60″ (1524mm) 60″ (1524mm)

Overall Length 76-1/2″ (1930mm) 76-1/2″ (1930mm) 76-1/2″ (1930mm)

32″ Conveyor Model 33-1/2″ (838mm) 33-1/2″ (838mm) 33-1/2″ (838mm)
or 2 × 15″ (381mm) or 2 × 15″ (381mm) or 2 × 15″ (381mm)

24″ Conveyor Model Single Oven Double Oven Triple Ove

Overall Depth 52.75″ (1340mm) 52.75″ (1340mm) 52.75″ (1340mm)
Overall Length 69″ (1753mm) 69″ (1753mm) 69″ (1753mm)

* All other dimension are the same

Recommended Minimum Clearances

Rear of Oven to Wall 3″ (76mm) 3″ (76mm) 3″ (76mm)

Control end of conveyor to Wall 1″ (25.4mm) 1″ (25.4mm) 1″ (25.4mm)

Non-control end of conveyor to Wall) 1″ (25.4mm) 1″ (25.4mm) 1″ (25.4mm)

Table 1-2: General Specications PS740 ELECTRIC

Weight 1150 lbs. (522kg)

Rated Heat Input 27.0 kW/hr (92,128 BTU, 23,216 kcal)

Maximum Operation Temperature 600°F / 315°C

Air Blowers Two Blowers at 1900 RPM

Warmup Time 15 min.

SERIES PS740 ELECTRICAL SPECIFICATIONS

Main Blower & Control Circuit Phase Frequency Amperage Poles Wires

Elements Voltage Voltage Draw

208-240V 3 Ph 50/60 Hz 100 Amp 3 Pole 4 Wire

(3 hot, 1 grd)

HEATER AMPERAGE

208-240V

208-240V 3 Ph 50/60 Hz 75 Amp 4 Pole

380V

208-240V 3 Ph 50/60 Hz 60 Amp 4 Pole

480V

Voltage kW Average Amps

L1 L2 L3

208 27 85 75 75
240 27 75 75 65

HEATER AMPERAGE

Voltage kW Average Amps N

L1 L2 L3

380-480 27 51 41 41 10

HEATER AMPERAGE

Voltage kW Average Amps N

L1 L2 L3
480 27 43 33 33 10

5 Wire

(3 hot, 1neut, 1 grd)

5 Wire

(3 hot, 1neut, 1 grd)

IMPORTANT – Additional electrical information is provided on the oven’s serial plate, and on the wiring diagram
inside the machinery compartment.

NOTE

Wiring Diagrams are contained in Section 6 of this Manual

and are also located inside the oven at the

bottom of the Control Panel

This Manual Must Be Kept For Future Reference

2P/N60254September28,2012

SECTION 2 – INSTALLATION

WARNING – After any conversions, readjustments, or service work on the oven:

• Check that the ventilation system is in operation.

WARNING - Keep the appliance area free and clear of combustibles.

WARNING – The oven must be installed on an even (level) non-ammable ooring and any adjacent walls
must be non-ammable. Recommended minimum clearances are specied in the Description section

of this manual.

WARNING – Do not obstruct the ow of ventilation air to and from your oven. There must be no obstruc­tions around or underneath the oven. Constructional changes to the area where the oven is installed
shall not affect the air supply to the oven.

CAUTION: To reduce the risk of re, the appliance is to be mounted on oors of noncombustible construction

with noncombustible ooring and surface nish and with no combustible material against the underside thereof,
or on noncombustible slabs or arches having no combustible material against the underside thereof, such con­struction shall in all cases extend not less than 12 inches (304mm) beyond the equipment on all sides.

CAUTION: For additional installation information, contact your local Authorized Service Agent.

NOTE – There must be adequate clearance between the oven and combustible construction. Clearance must

also be provided for servicing and for proper operation.

NOTE – An electrical wiring diagram for the oven is located inside the machinery compartment.

NOTE: All aspects of the oven installation, including placement, utility connections, and ventilation requirements,

must conform with any applicable local, national, or international codes. These codes supersede the require-

ments and guidelines provided in this manual.

NOTE: In the USA, the oven installation must conform to local codes. Electric ovens, when installed, must be
electrically grounded in accordance with local codes, or in the absence of local codes, with the National Electri­cal Code (NEC), or ANSI/NFPA70.

NOTE: In Canada, the oven installation must conform with local codes. Electric ovens, when installed, must be
electrically grounded in accordance with local codes, or in the absence of local codes, with the Canadian Electri-

cal Code CSA C22.2.

3 P/N60254September28,2012

PS740 24″ OVEN INSTALLATION

1

2

3

5

4

REQUIRED KITS AND EQUIPMENT

PS740 PS740 PS740 PS740
Electric Oven Single Oven DoubleOven TripleOven
Installation Option Base w/ OptionBase w/ OptionBase w/
TYPE OF INSTALLATION Kit 15″ Legs, 6″ Legs, Casters& Top
Casters & Top Casters & Top Kit
Kit Kit
P/N61453 P/N61123 P/N61457 P/N61458

PS740 Single Gas Oven 1 1

PS740 Double Gas Oven 2 1

PS740 Triple Gas Oven 3 1

PARTS LIST FOR SERIES PS740 ELECTRIC OVEN

INSTALLATION KIT

P/N 61453
(Two required for double oven)
(Three required for triple oven)

ITEM
NO. QTY PART NO. DESCRIPTION

1 1 61823 CONVEYOR END STOP

2 1 31461 CONVEYOR LEFT REAR STOP

3 1 42612 SERVICE AGENCY DIRECTORY

4 1 22500-0080 LABEL, MM

5 1 51054 ASSY, HANDLE & DOOR

Figure 2-1A. PS740-Series Electric Oven Installation Parts

4P/N60254September28,2012

PS740 OVEN INSTALLATION

1

2

3

5

4

REQUIRED KITS AND EQUIPMENT

PS740 PS740 PS740 PS740
Electric Oven Single Oven DoubleOven TripleOven
Installation Option Base w/ OptionBase w/ OptionBase w/
TYPE OF INSTALLATION Kit 15″ Legs, 6″ Legs, Casters& Top
Casters & Top Casters & Top Kit
Kit Kit
P/N61824 P/N67025 P/N67026 P/N66164

PS740 Single Electric Oven 1 1

PS740 Double Electric Oven 2 1

PS740 Triple Electric Oven 3 1

PARTS LIST FOR SERIES PS740 ELECTRIC OVEN

INSTALLATION KIT

P/N 61824
(Two required for double oven)
(Three required for triple oven)

ITEM
NO. QTY PART NO. DESCRIPTION

1 1 61823 CONVEYOR END STOP

2 1 55027 CONVEYOR LEFT REAR STOP

3 1 42612 SERVICE AGENCY DIRECTORY

4 1 22500-0080 LABEL, MM

5 1 51054 ASSY, HANDLE & DOOR

Figure 2-1B. PS740-Series Electric Oven Installation Parts

5 P/N60254September28,2012

2

Figure 2-2A. Model PS740 24″ Single Oven

HARDWARE BAG
5, 6, 7, 10 & 11

Option Base with Legs and Top

1

8

4

9

PARTS LIST FOR PS740 SERIES 24″ SINGLE OVEN OPTION - BASE w/15″ LEGS & TOP

P/N 67027

ITEM NO. QTY PART NO. DESCRIPTION

1 1 64943 COMPLETE BASE WELDMENT

2 4 66851 TOP PLATE, LEG WELDMENT

4 4 58930 SWIVEL CASTER FLAT PLATE

5 32 2000531 3/8″-16 × 1″ HEX SCREW, SST

6 32 21416-0001 3/8″ FLAT WASHER, SS

7 32 21422-0001 3/8″ SPLIT LOCK WASHER, ZP

8 1 22450-0228 RESTRAINT CABLE ASSEMBLY

9 1 61125 TOP COVER

10 2 59677 SCR, MS SL TR HD 10-32 × 2-1/2″

11 2 7A2S15 SCR, MS STR TRSHD 10-32 × 3/4″

6P/N60254September28,2012

2

Figure 2-2B. Model PS740 32″ Single Oven

HARDWARE BAG
5, 6, 7, 10 & 11

Option Base with Legs and Top

1

8

4

9

PARTS LIST FOR PS740 32″ SERIES SINGLE OVEN OPTION - BASE w/15″ LEGS & TOP

P/N 67025

ITEM NO. QTY PART NO. DESCRIPTION

1 1 66159 COMPLETE BASE WELDMENT

2 4 66851 TOP PLATE, LEG WELDMENT

4 4 58930 SWIVEL CASTER FLAT PLATE

5 32 2000531 3/8″-16 × 1″ HEX SCREW, SST

6 32 21416-0001 3/8″ FLAT WASHER, SS

7 32 21422-0001 3/8″ SPLIT LOCK WASHER, ZP

8 1 22450-0228 RESTRAINT CABLE ASSEMBLY

9 1 59560 TOP COVER

10 2 59677 SCR, MS SL TR HD 10-32 × 2-1/2″

11 2 7A2S15 SCR, MS STR TRSHD 10-32 × 3/4″

7 P/N60254September28,2012