Middleby Marshall Oven PS724 Parts List

MiddlebyMiddleby

Middleby

MiddlebyMiddleby MarshallMarshall

Marshall

MarshallMarshall

A MIDDLEBY COMPANY

owner's operating

& installation

manual

PS724-Series Electric Ovens: English

October 27, 2008

PS724-Series

Model

PS724E

OVENS

PS724 (Double)

PS724 (Single)

PS724 (Triple)

Part No. 61778

Price $30.00

P: 10/08

NOTICE:

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

This 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 instructions thoroughly before installing or servicing this equipment.

NOTICE

The warranty is demonstrated under the supervision of a factory-authorized installer.

NOT VALID

unless the oven is installed, started, and

NOTICE

Contact your authorized Service Agency to perform maintenance and

repairs. A 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 specifications at any time.

KEEP THIS MANUAL IN A VISIBLE LOCATION NEAR THE OVEN

FOR FUTURE REFERENCE.

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

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 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, 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 profits of Buyer.

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

no quibble

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 factory-authorized installer.

Normal maintenance functions, including lubrication, adjustment of airflow, 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 profits 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.

Middleby Marshall Inc. • 1400 Toastmaster Drive • Elgin, Illinois 60120-9272 U.S.A. • (847) 741-3300 • FAX: (847) 741 4406

iii

TABLE OF CONTENTS

Page

SECTION 1

I. MODEL IDENTIFICATION .............................................. 1

SERIES PS724 ELECTRIC SPECIFICATIONS ................. 2

II. COMPONENT FUNCTION ............................................. 4

A. Conveyor Motor and Conveyor Belt ........................ 4

B. Blower Fan ................................................................. 4

C. Cooling Fan ................................................................ 4

D. Air Fingers and Blank Plates - See Figure 1-9 ........ 4

SECTION 2

I. UNLOADING ................................................................... 8

PARTS LIST FOR SERIES PS724 ELECTRIC OVEN

INSTALLATION KIT .................................................... 8

UTILITY ROUGH-IN DIMENSIONS AND POSITIONING

FOR PS724-SERIES OVENS .................................... 13

CIRCUIT BREAKER ..................................................... 13

ELECTRICAL SPECIFICATIONS ................................. 13

ELECTRICAL RATING ................................................. 13

SUPPLY WIRE .............................................................. 13

SUGGESTED ................................................................ 13

II. VENTILATION GUIDELINES ........................................ 13

III. ELECTRICAL CONNECTION INFORMATION FOR

PS724-SERIES OVENS. ........................................... 14

IV. ELECTRIC SUPPLY .................................................... 14

SECTION 3 INSTALLATION

I. CONTROL FUNCTIONS ................................................ 15

II. COMPONENT INFORMATION AND LOCATION ......... 16

A. Door Safety Switch .................................................. 16

B. Blower Switch .......................................................... 16

C. Heat Switch .............................................................. 16

D. Temperature Controller .......................................... 16

E. Conveyor ................................................................. 17

MEASURING CONVEYOR SPEED. ............................. 17

TABLE OF CONTENTS

(Continued)

Page

III. STEP-BY-STEP OPERATION ..................................... 18

A. Startup Procedures ................................................. 18

Daily Startup ................................................................. 18

Power Failure ............................................................... 18

B. Shutdown Procedure ............................................... 18

IV. NORMAL OPERATION - STEP-BY-STEP ................... 20

A.Daily Startup Procedure ........................................... 20

B. Daily Shutdown Procedure ...................................... 20

V. QUICK REFERENCE: TROUBLESHOOTING ............ 22

SECTION 4 MAINTENANCE

I. MAINTENANCE - DAILY ............................................ 24

A. Exterior ..................................................................... 24

B. Cooling Fan ............................................................. 24

C. Conveyor Belt .......................................................... 2 4

D. Crumb Pans ............................................................. 24

II. MAINTENANCE - MONTHLY ....................................... 25

A. Removing Conveyor From Oven For Cleaning ..... 25

B. Air Fingers Disassembly For Cleaning .................. 27

C. Reassembly of Air Fingers ..................................... 28

D. Reinstall End Plugs ................................................. 30

E. Conveyor Reassembly Into Oven .......................... 31

F. Checking Conveyor Belt Tension ........................... 31

G. Conveyor Belt Link Removal ................................. 32

H. Attaching Drive Chain ............................................. 3 3

III. MAINTENANCE - (3 and 6 MONTH) ............................ 34

PS724-SERIES ELECTRIC OVEN KEY

SPARE PARTS ........................................................... 35

KEY SPARE PARTS KIT ............................................... 35

SECTION 5 TROUBLESHOOTING

Troubleshooting Charts ...................................................... 3 7

SECTION 6 ELECTRICAL SCHEMATICS

Wiring Diagrams ............................................................... 39

NOTE

Wiring Diagrams are in Section 6 of this Manual. The diagram for each oven is also inside the left

side control box door.

SECTION 1

DESCRIPTION

I. MODEL IDENTIFICATION

The Middleby Marshall PS724-Series may be used either as a single oven or stacked for use as double or triple ovens.

A single PS724-Series Oven (Figure 1-1) can be mounted on an insulated base with short legs for countertop use, or on a leg stand with a lower shelf and casters for a free standing unit. A double oven (Figure 1-2) consists of two,

stacked,

consists of three stacked single ovens. The lower oven is mounted on an insulated base with casters affixed.

On a double or triple oven, the ovens operate independently. All ovens use identical controls and components. One oven can be cleaned or serviced, while the others are operating.

single ovens. A triple oven (Figure 1-3)

SECTION 1

DESCRIPTION

Figure 1-1. Single PS724 Oven

Figure 1-2. Double PS724 Oven

Figure 1-3. Triple PS724 Oven

SECTION 1 DESCRIPTION

PS724 SERIES OVEN SPECIFICATIONS

Conveyor Belt Width 18.00″ (457 mm) Heating Zone Length 24.00″ (610 mm) Baking Area Square Feet 3.0 sq. ft. (0.28 m2) Overall Dimension – Standard Single Oven w/Legs - 8″ Exit tray Installed 64.00″ (1625 mm) L ×

Overall Dimension – Double Oven 64.00″ (1625 mm) L ×

Overall Dimension – Triple Oven 64.00″ (1626 mm) L ×

Weight of Single Oven 250 lb (93.3 kg) Shipping Weight 360 lb (163.3 kg) Shipping Cube 61.1 ft3 (1.73 m3) Operating Range 17.4 kW/hr Maximum Operating Temperature 600°F (316°C) Warm-up Time 20 min. Belt Speed Limits 0.30 - 12:00

36.00″ (914 mm) W ×

43.69″ (1110 mm) H ×

36.00″ (914 mm) W ×

64.00″ (1625 mm) H ×

36.00″ (914 mm) W ×

69.25″ (1759 mm) H ×

SERIES PS724 ELECTRICAL SPECIFICATIONS

DOMESTIC OVENS

VOLTAGE PHASE HZ kW WIRING BREAKER POWER POWER

208 3 60 14.4 STD 4-WIRE / L1,L2,L3 & GROUND 50 A 8 GA, 4-WIRE NEMA 15-50P

3 50-60 17.4 OPT 4-WIRE / L1,L2,L3 & GROUND 60 A 6 GA, 4-WIRE NEMA 15-60P

240 3 60 14.4 STD 4-WIRE / L1,L2,L3 & GROUND 50 A 8 GA, 4-WIRE NEMA 15-50P

3 60 17.4 OPT 4-WIRE / L1,L2,L3 & GROUND 60 A 6 GA, 4-WIRE NS

480 3 60 17.4 STD 5-WIRE / L1,L2,L3,N & GROUND 30 A 8 GA, 5-WIRE NS

INTERNATIONAL OVENS

VOLTAGE PHASE HZ kW WIRING BREAKER POWER POWER

208 3 50-60 17.4 OPT 4-WIRE / L1,L2,L3 & GROUND 60 A 6 GA, 4-WIRE - NS NS

3 50-60 14.4 STD 4-WIRE / L1,L2,L3 & GROUND 50 A 8 GA, 4-WIRE - NS NS

230-240 3 50-60 16 / 17.4 OPT 4-WIRE / L1,L2,L3 & GROUND 60 A 6 GA, 4-WIRE - NS NS

3 50-60 13.2 / 14.4 STD 4-WIRE / L1,L2,L3 & GROUND 50 A 8 GA, 4-WIRE - NS NS 380 3 50-60 17.4 STD 5-WIRE / L1,L2,L3,N & GROUND 40 A 10 GA, 4-WIRE - NS NS 400-416 3 50-60 16.1 / 17.4 STD 5-WIRE / L1,L2,L3,N & GROUND 35 A 6 GA, 5-WIRE - NS NS

STD = Standard OPT = Optional

NS = Not Supplied

SIZE CORD PLUG

SPECIFICATION

SIZE CORD PLUG

SPECIFICATION

NOTE

Wiring Diagrams are contained in Section 6 of this Manual

and are also located inside inside the left side control box door.

Additional electrical information is provided on the oven's serial plate.

This Manual Must Be Kept For Future Reference.

SECTION 1

DESCRIPTION

2EMOVABLE

%ND0LUG5PPER

(EAT#ONVEYOR

2EMOVABLE

%ND0LUG,OWER

#ASTERS

2EMOVABLE

#ONVEYOR !SSEMBLY

4EMPERATURE

#ONTROLLER

3PEED #ONTROL

-AIN"LOWER 3WITCH

3WITCH

Figure 1-4. PS724-Series Oven Components Locations

SECTION 1 DESCRIPTION

II. COMPONENT FUNCTION (Figure 1-4)

A. Conveyor Motor and Conveyor Belt

The conveyor belt is driven by a variable-speed electric motor (Figure 1-5) operating through a gear reducer. The motor speed is controlled by a digital control. The stainless-steel wire belt can travel in either direction at variable rates ranging from 30 seconds to 12 minutes; this is the time that a product can take to pass through the oven.

B. Blower Fan

The circulation air blower drive motors (2) are located in the right side control box. The blowers force heated air through the air fingers. The MAIN / BLOWER switch must be set to “ON” or “I” for oven warmup and baking.

C. Cooling Fan — See Figure 1-5 and Figure 1-6

Cooling fans are located at the rear of each (left and right) control box. Cooling air is drawn into each control box and blown across the control components and circulating blower bearings and exits the oven front and rear louvers.

#OOLING&AN

"LOWER

-OTOR

Blower Assembly

IMPORTANT

THE CONTROL BOX DOORS MUST BE CLOSED WHILE THE OVEN IS HOT OR HEATING IN ORDER TO KEEP THE COMPONENTS AND BEARINGS COOL.

D. Air Fingers - See Figure 1-7

An Air Finger Assembly is made up of three parts:

1. Outer Plate - The Outer Plate is the removable covering with tapered holes, which direct the air stream onto the product being baked.

2. Inner Plate -The perforated Inner Plate is vital in forming the unique air jets. It must be assembled into the manifold with its holes aligned with the holes of the outer plate.

3. Manifold - The Manifold is the assembly which slides on tracks into the oven plenum.

Conveyor

Drive Motor

Right Control Box

Figure 1-5. Machinery Compartment

Components

SECTION 1

DESCRIPTION

0OWER#ABLE%NTRANCE

"LOWER-OTOR!CCESS

#OOLING&AN'RILLE

0OWER#ABLE%NTRANCE

"LOWER-OTOR!CCESS

#ONNECTION

"LOCK!CCESS

#OOLING

&AN'RILLE

Figure 1-6. Cooling Fan

SECTION 1 DESCRIPTION

Outer Plate

Inner Plate

Finger Manifold Assembly

Baffle

Figure 1-7. Air Finger.

SECTION 2

INSTALLATION

WARNING The oven must be installed on an even (level) non-flammable flooring and any adjacent walls must be non-flammable. Recommended minimum clearances are specified in the Description section of

this Manual.

WARNING

Do not obstruct the flow of combustion and 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

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

requirements and guidelines provided in this manual.

NOTE

In the USA, the oven installation must conform with local codes. Installed ovens 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 - CANADA INSTALLATION

In Canada, the oven installation must conform with local codes. Installed ovens must be electrically

grounded in accordance with local codes, or in the absence of local codes, with the Canadian Electrical Code

CSA C22.2.

NOTE - AUSTRALIA INSTALLATION

In Australia, the oven installation must conform with any requirements of the appropriate statutory authority.

NOTE - CE OVEN INSTALLATION

Four casters are provided to allow the oven to be more easily moved to the installation location. These casters

are intended to simplify pre-installation movement only, and are NOT suitable for use as part of a CE oven

installation. During the installation procedure, the casters MUST be removed, so that the oven can be

supported by the supplied 152mm adjustable legs.

SECTION 2 INSTALLATION

NOTE: The oven, 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

There must be adequate clearance between the oven and any adjacent combustible construction. Clearance must also be provided for servicing and for operation.

CAUTION

It is recommended that the oven be placed under a ventilation hood for adequate air supply and ventilation.

CAUTION

Do not obstruct the flow of ventilation air to and from your oven. Do not obstruct the fan holes in the rear of the unit.

I. UNLOADING

Your Middleby Marshall PS724-Series Oven is shipped partially assembled. It will arrive in a carton on a crate.

Carton size for a PS724-Series Oven is:

56.3″ (1422 mm) Long ×

41″ (1041 mm) Wide ×

40″ (1013 mm) High

The crate and carton must be examined before signing the Bill of Lading. Report any visible damage to the transport company, and check for the proper number of crates. If apparent damage is found, make arrangements to file a claim against the carrier. Surface Interstate Commerce Regulations (U.S.A.) require that the claim must be initiated by the consignee within 10 days from the date that the shipment is received.

03/6%. ).34!,,!4)/.

2%15)2%$+)43!.$%15)0-%.4

490% 03 33 03 33 ).34!,,!4)/.

3INGLE /VEN  

$OUBLE/VEN  1$

4RIPLE/VEN1$

3INGLE /VEN $OUBLE/VEN 4RIPLE /VEN&RXQWHU

)NSTALLATION )NSTALLATION )NSTALLATION )NSTALLATION

+IT0. +IT0. +IT0. +IT0.

   

 #%  #% #%

SECTION 2

INSTALLATION

Qty. Qty. Qty. Inc. with Inc. with

Single Double Triple domestic CE

Item Oven Oven Oven Part No. ovens? ovens? Description

1 1 1 1 61243 Yes Yes Base pad 2 2 2 2 59835 Yes Yes Top panel 3 4 4 -- 37900-0024 Yes Yes 15 ″ (381mm) leg extension,

4 2 2 2 22290-0009 Yes Yes Caster, with flat plate and brake 5 2 2 2 22290-0010 Yes Yes Caster, with flat plate (no brake)

NOTE: Domestic and standard export ovens include 2 braking casters (item 5) and 2 non-braking casters (Item 6). CE-approved ovens include 4 non-braking casters (Item 6) SOLELY for the purpose of moving the oven to the installation location. Casters are NOT suitable for use as part of CE oven installations. Refer to the notice on the preceding page.

6 4 4 4 22450-0028 No No Leg, adjustable, 6″ (152mm) 7 1 1 1 21392-0004 Yes Yes Eyebolt, 3/4″ 8 A/R A/R A/R 220373 Yes Yes Hex bolt, 3/8″-16 x 1″

NOTE: CE-approved ovens include 32 hex bolts. Domestic and standard export ovens include 31 hex bolts and one eyebolt (item 8) that acts as an anchor for the restraint cable (Item 12). CE ovens are mounted on legs (Item 7) and do not use a restraint cable.

9 32 32 32 21416-0001 Yes Yes Flat washer, 3/8 ″ 10 32 32 32 21422-0001 Yes Yes Lockwasher, 3/8″ 11 1 1 1 22450-0228 Yes Yes Restraint cable assembly 12 1 1 1 61778 Yes Yes Owner's Operating and Installation

13 1 1 1 1002040 Yes Yes Authorized Service Agency Listing 14 1 1 -- 61226 Yes Yes Lower shelf

8, 9, 10

for single and double ovens

Manual

Figure 2-1. PS724-Series Electric Oven Installation Kit

SECTION 2 INSTALLATION

Figure 2-5. MODEL PS724 SINGLE OVEN DIMENSIONS

SECTION 2

INSTALLATION

Figure 2-6. MODEL PS724 DOUBLE OVEN DIMENSIONS

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