Middleby Marshall Oven PS536 Series User Manual

PS536-Series Electric Ovens: English  
Middleby  
®
Marshall  
AMIDDLEBYCOMPANY  
owner's  
operating  
& installation  
manual  
PS536-Series OVENS  
Model PS536ES  
PS536ES (Single)  
PS536ES (Double)  
PS536ES (Triple)  
Part No. 58367  
Price $30.00  
©2005 Middleby Marshall Inc.  
P: 08/08 Rev. B  
Download from Www.Somanuals.com. All Manuals Search And Download.  
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 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  
Sellersobligationunderthiswarrantyshallbelimitedtoreplacingor  
repairing, at Sellers option, without charge, F.O.B. Sellers 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 Sellers factory, whichever is  
earlier, providedthattermsofpaymenthavebeenfullymet. Alllabor  
shallbeperformedduringregularworkinghours.Overtimepremium  
will be charged to the Buyer.  
MIDDLEBY MARSHALL, HEREINAFTER REFERREDTO AS  
THE SELLER,WARRANTS EQUIPMENT MANUFACTURED  
BY IT TO BE FREE FROM DEFECTS IN MATERIAL AND  
WORKMANSHIP FOR WHICH IT IS RESPONSIBLE. THE  
SELLERS OBLIGATION UNDERTHISWARRANTY SHALL  
BE LIMITEDTO REPLACING OR REPAIRING, AT SELLERS  
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 EFFEC-  
TIVE FOR A PERIOD OF ONEYEAR FROM DATE OF ORIGI-  
NAL INSTALLATION, OR 18 MONTHS FROM DATE OF PUR-  
CHASE,WHICHEVER IS EARLIER, PROVIDEDTHATTERMS  
OF PAYMENT HAVE BEEN FULLY MET.  
Thiswarrantyisnotvalidunlessequipmentisinstalled,started,  
and demonstrated under the supervision of a factory-autho-  
rized installer.  
Normal maintenance functions, including lubrication, adjustment of  
airflow, thermostats, door mechanisms, microswitches, burners  
and pilot burners, and replacement of light bulbs, fuses and indicat-  
ing lights, are not covered by warranty.  
This warranty is valid only if the equipment is installed, started,  
and demonstrated under the supervision of a factory-autho-  
rized installer.  
Anyrepairsorreplacementsofdefectivepartsshallbeperformedby  
Sellers authorized service personnel. Seller shall not be respon-  
sible for any costs incurred if the work is performed by other than  
Sellers authorized service personnel.  
Normal maintenance functions, including lubrication, clean-  
ing, or customer abuse, are not covered by this no quibble  
warranty.  
When returning any part under warranty, the part must be intact and  
complete, without evidence of misuse or abuse, freight prepaid.  
Seller shall be responsible only for repairs or replacements  
of defective parts performed by Sellers authorized service  
personnel. Authorized service agencies are located in prin-  
cipal 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.  
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 Buyers 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 is exclusive and in lieu of all other  
warranties, expressed or implied. There are no implied  
warranties of merchantability or of fitness for a particu-  
lar purpose.  
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 shall be Sellers sole and exclusive obligation  
and Buyers sole and exclusive remedy for any action, in-  
cluding 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.  
THE FOREGOING WARRANTY IS EXCLUSIVE AND IN LIEU OF  
ALL OTHER EXPRESS AND IMPLIED WARRANTIES WHATSO-  
EVER. SPECIFICALLY THERE ARE NO IMPLIED WARRANTIES  
OF MERCHANTABILITY OR OF FITNESS FOR A PARTICULAR  
PURPOSE.  
This warranty is effective on Middleby Marshall equip-  
ment sold on, or after, February 15, 1995.  
The foregoing shall be Sellers sole and exclusive obligation and  
Buyerssoleandexclusiveremedyforanyaction, whetherinbreach  
of contract or negligence. In no event shall seller be liable for a sum  
in excess of the purchase price of the item.  
© 2005 - Middleby Marshall, A Middleby Company.  
The Middleby Marshall logo is a registered trademark of Middleby Marshall, A Middleby Company.  
Middleby Marshall Inc. 1400Toastmaster Drive Elgin, Illinois 60120-9272 U.S.A.(847) 741-3300 FAX:(847) 741 4406  
iii  
Download from Www.Somanuals.com. All Manuals Search And Download.  
TABLEOFCONTENTS  
TABLEOFCONTENTS  
(Continued)  
Page  
Page  
SECTION 1  
Daily Startup................................................................. 24  
Power Failure ............................................................... 24  
B. Shutdown Procedure............................................... 24  
A.Daily Startup Procedure .......................................... 26  
IV. NORMAL OPERATION - STEP-BY-STEP .................. 26  
V. QUICK REFERENCE: TROUBLESHOOTING ............. 28  
I. MODELIDENTIFICATION .............................................. 1  
SERIES PS536 ELECTRICAL SPECIFICATIONS............. 2  
II. PRINCIPLE OF AIR FLOW............................................. 3  
A. Heat Transfer and How It Works .............................. 3  
II. PRINCIPLE OF AIR FLOW (Continued) ........................ 4  
B. Air Fingers ................................................................. 4  
III. COMPONENT FUNCTION ............................................ 5  
A. Conveyor Motor and Conveyor Belt ........................ 6  
B. Blower Fan ................................................................. 6  
C. Electric Heaters ........................................................ 6  
D.Window ....................................................................... 6  
E.CoolingFan ................................................................ 7  
F. Air Fingers and Blank Plates - See Figure 1-9......... 8  
SECTION 2  
SECTION 4 MAINTENANCE  
I. MAINTENANCE - DAILY ........................................... 30  
A. Exterior .................................................................... 30  
B. Cooling Fan .............................................................. 30  
C. Conveyor Belt ......................................................... 30  
D. Crumb Pans ............................................................ 30  
E. Window .................................................................... 30  
II. MAINTENANCE - MONTHLY ...................................... 31  
A. Removing Conveyor From Oven For Cleaning .... 31  
B. Air Fingers Disassembly For Cleaning................. 33  
C. CleaningtheWindow .............................................. 34  
D. Reassembly of Air Fingers .................................... 34  
E. Reinstall End Plugs................................................. 37  
F. Conveyor Reassembly Into Oven.......................... 38  
G. Checking Conveyor Belt Tension ......................... 38  
H. Conveyor Belt Link Removal ................................ 39  
I. Replacing Conveyor Belt......................................... 40  
J. Attaching Drive Chain ............................................ 40  
III. MAINTENANCE - EVERY 3 MONTHS ........................ 41  
A. Cleaning the Blower/Fan Motor ............................. 41  
B. Electrical Terminals ............................................... 42  
C. Ventilation ............................................................... 42  
D. Checking the Blower/Fan Belt ............................... 42  
E. Blower Fan Shaft Bearing Lubrication .................. 43  
F. Split-belt Conveyor Shaft Cleaning ........................ 43  
IV. MAINTENANCE - EVERY 6 MONTHS .................... 44  
PS540-SERIES ELECTRIC OVEN KEY SPARE  
PARTS ....................................................................... 46  
KEY SPARE PARTS KIT .............................................. 46  
SECTION 5 TROUBLESHOOTING  
TroubleshootingCharts ..................................................... 47  
SECTION 6 - PARTS LIST  
OVEN PANELS, WINDOW AND LEGS ............................ 51  
CONTROL PANEL ........................................................... 53  
BLOWER AND SHROUD ................................................. 55  
CONVEYOR ...................................................................... 57  
SPLIT BELT CONVEYOR ................................................. 59  
MACHINERY COMPARTMENT ....................................... 61  
SECTION 7 ELECTRICAL SCHEMATICS  
I. UNLOADING ................................................................... 9  
PS536 OVEN INSTALLATION  
REQUIRED KITS AND EQUIPMENT ........................ 10  
PARTS LIST FOR SERIES PS536 ELECTRIC OVEN  
INSTALLATIONKIT .................................................. 10  
PARTS LIST FOR PS536 SERIES SINGLE OVEN  
OPTION - BASE W/15LEGS & TOP P/N 34832 ..... 11  
PARTS LIST FOR PS536 SERIES DOUBLE OVEN  
OPTION - BASE W/6LEGS,  
CASTERS & TOP P/N 34833 .................................... 12  
PARTS LIST FOR PS536 SERIES TRIPLE OVEN  
OPTION - BASE w/OUTRIGGERS & TOP  
P/N 34831................................................................... 13  
RESTRAINT CABLE INSTALLATION.......................... 16  
UTILITY ROUGH-IN DIMENSIONS AND POSITIONING  
FOR PS536-SERIES OVENS .................................... 17  
CIRCUIT BREAKER ..................................................... 17  
ELECTRICAL SPECIFICATIONS ................................. 17  
ELECTRICAL RATING ................................................. 17  
SUPPLY WIRE .............................................................. 17  
SUGGESTED ................................................................ 17  
II. VENTILATIONGUIDELINES ....................................... 18  
VENTILATION HOOD ................................................... 18  
VENTILATION CAPTURE TEST................................... 18  
III. ELECTRICAL CONNECTION INFORMATION FOR  
PS536-SERIES OVENS. ........................................... 19  
IV. ELECTRIC SUPPLY FOR ELECTRIC-HEATED  
OVENS....................................................................... 19  
VI. CONVEYOR REAR STOP AND  
END STOP INSTALLATION ...................................... 20  
SECTION 3 INSTALLATION  
I. CONTROL FUNCTIONS ................................................ 21  
II. COMPONENT INFORMATION AND LOCATION ......... 22  
A. Door Safety Switch.................................................. 22  
B. Blower Switch .......................................................... 22  
C. Heat Switch .............................................................. 22  
D. Temperature Controller .......................................... 22  
E. Conveyor ................................................................. 23  
MEASURING CONVEYOR SPEED. ............................. 23  
III. STEP-BY-STEPOPERATION ..................................... 24  
A. Startup Procedures................................................. 24  
Wiring Diagram, E208-240 50/60, 3PH 4W PS536 ........ 63  
Wiring Diagram, E380-480 50/60, 3PH 5W PS536 ........ 64  
Wiring Diagram, E380V 50/60, 3PH 5W PS536.............. 65  
NOTE  
Wiring Diagrams are in Section 7 of this Manual.  
The diagram for each oven is also on the lower  
inner surface of its Control Console.  
iv  
Download from Www.Somanuals.com. All Manuals Search And Download.  
SECTION 1  
DESCRIPTION  
SECTION 1  
DESCRIPTION  
I. MODEL IDENTIFICATION  
The Middleby Marshall PS536ES-Series may be used  
eitherasasingleovenorstackedforuseasdoubleortriple  
ovens. Themajordifferencebetweentheovenmodelsin  
this series is the width of the conveyor.  
AsinglePS536ES-SeriesOven(Figure1-1)ismountedon  
abasepadwithlegsandcasters. Adoubleoven(Figure1-  
2) consists of two, stacked, single ovens. A triple oven  
(Figure 1-3) consists of three stacked single ovens. The  
lower oven is mounted on a base pad with short legs and  
casters.  
Figure 1-1. Single PS536ES Oven  
On a double or triple oven, the ovens operate completely  
independent. Allovensuseidenticalcontrolsandcompo-  
nents. One oven can be cleaned or serviced, while the  
othersareoperating.  
Figure 1-2. Double PS536ES Oven  
Figure 1-3. Triple PS536ES Oven  
1
Download from Www.Somanuals.com. All Manuals Search And Download.  
SECTION 1  
DESCRIPTION  
PS536ES SERIES OVEN SPECIFICATIONS  
Table 1-1: Dimensions  
Overall Height: single oven with 17-1/2" (446mm) legs  
double oven with standard 17-1/2" (446mm) legs  
double oven with optional 20-1/2" (521mm) legs  
double oven with optional 25-1/2" (648mm) legs  
triple oven with 6" (152mm) legs  
43-1/2" (1105mm)  
63" (1600mm)  
66" (1676mm)  
71" (1803mm)  
71" (1803mm)  
46" (1168mm)  
61" (1549mm)  
57" (1447mm)  
77" (1956mm)  
36" (914mm)  
Overall Depth:  
Overall Length: with standard 60"/1524mm conveyor  
with optional 56"/1422mm conveyor  
with optional 76"/1930mm conveyor  
Baking Chamber Length  
Conveyor Width: Single Belt  
Split Belt  
20" (508mm)  
2 x 9-1/2" (241mm)  
Conveyor Length  
56" (1422mm) or 60" (1524mm) or 76" (1930mm)  
Recommended Minimum Clearances:  
Rear of oven to wall  
3" (76mm)  
1" (25.4mm)  
1" (25.4mm)  
Control end of conveyor to wall  
Non-control end of oven to wall  
Table 1-2: General specifications (per oven cavity)  
Weight  
400 lbs. (182kg)  
Rated Heat Input:  
17 kW/hr.  
Maximum Operating Temperature  
550°F (288°C)  
Warmup Time  
25 minutes  
SERIES PS536ES ELECTRICAL SPECIFICATIONS  
Main Blower &  
Elements Voltage  
Control Circuit  
Voltage  
Phase  
Frequency  
Amperage  
Draw  
Poles  
Wires  
208-240V  
208-240V  
3 Ph  
50/60 Hz  
60 Amp  
4 Pole  
4 Wire  
(3 hot, 1 grd)  
HEATER AMPERAGE  
AMPERAGE  
Voltage  
208  
240  
kW  
17  
17  
L1  
49.4  
42.1  
L2  
49.4  
42.1  
L3  
47.2  
40.9  
380-400V  
400V  
208-240V  
3 Ph  
50/60 Hz  
60 Amp  
4 Pole  
4 Pole  
5 Wire  
(3 hot, 1neut, 1 grd)  
HEATER AMPERAGE  
Voltage  
380-400  
kW  
L1  
L2  
25.8-28.6  
L3  
25.8-28.6  
N
1.2  
17-18.8  
27.0-29.8  
3 Ph  
208-240V  
50/60 Hz  
60 Amp  
5 Wire  
(3 hot, 1neut, 1 grd)  
HEATER AMPERAGE  
kW  
Voltage  
L1  
L2  
L3  
N
17  
20.4  
480  
21.6  
20.4  
1.2  
NOTE  
Wiring Diagrams are contained in Section 7 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  
2
Download from Www.Somanuals.com. All Manuals Search And Download.  
SECTION 1  
DESCRIPTION  
II. PRINCIPLE OF AIR FLOW  
Thefan-styleblowerdrawsairintotheovenplenumwhere  
itisheated.Theblowerthenpushesthehotairthroughthe  
air fingers into the baking chamber. Each air finger  
containsaninnerplateandouterplatethatformthehotair  
intojets,distributingitacrossaconveyorbeltonwhichthe  
food product rides. Air is then pulled back into the blower  
and the process continues. The curving, black arrows of  
Figure 1-4 show this air flow.  
PS536ES-Series Oven is light in color: To reflect more  
heat back onto the food product.  
Convection: Thispathhastodowithmovingavolumeof  
air.Itexplainswhyhotairrisesandcoolerairreplaceshot  
air. An industrial application of this principle is to incorpo-  
rate a fan to force the hot air movement, which in turn  
increases the heat transfer to the food product.  
EachPS536ES-SeriesOvenhasalargefan-styleblower  
to move the hot air through the air fingers and onto the  
product to cook/bake the food product most efficiently.  
A. Heat Transfer and How It Works  
1. Heat constantly moves from a warm object to a cold  
object. Heat moves using three different paths: Conduc-  
tion; Radiation; and Convection.  
2. Temperature is the intensity of heat at the point where  
it is sensed. As discussed above, heat flows by conduc-  
tion,radiationandconvection.Thespeedatwhichtheheat  
flowsisdeterminedbythetemperaturedifferencebetween  
the oven and the food product. The larger the difference,  
the faster the heat flows to the item that is being baked.  
Conduction: This path utilizes surface-to-surface con-  
tact. The pizza dough in contact with the pan is a good  
example of conduction.  
Radiation: Thispathhastodowithobjectsradiatingheat.  
Dark objects absorb heat whereas light or shiny objects  
reflect more heat. This is the reason that the inside of a  
Conveyor Belt(s)  
Window  
Upper Air Fingers  
Lower Air Fingers  
Figure 1-4. PS536ES-Series Oven Air Flow  
3
Download from Www.Somanuals.com. All Manuals Search And Download.  
SECTION 1  
DESCRIPTION  
II. PRINCIPLE OF AIR FLOW (Continued)  
B. Air Fingers  
Seriesovensusedtobakepizzahavefourbottomfingers  
and two top fingers. For special product baking require-  
ments, a number of other styles of fingers and finger  
arrangements are available from the factory.  
ThePS536ES-SeriesOvensareconveyorizedovensthat  
employ vertical jets of hot air streaming from air fingers  
(Figure 1-5) to give uniform, intense heating. The vertical  
streamsofhotairprovideanexceptionalheattransferrate  
andgenerallybakefasterandatlowertemperaturesthan  
convection hot air or infrared heating ovens.  
NOTE: Some customers have a predetermined finger  
arrangement. If you have any questions pertaining to the  
finger arrangement, please call the factory.  
A PS536ES-Series Oven can accommodate up to four  
bottomairfingersandfourtopairfingers.SomePS536ES-  
Manifold  
Air Flow  
From Plenum  
Manifold Baffle  
Outer Plate  
Inner Plate  
High Velocity  
Columns of Air  
on Food Product  
Air Flow  
From Plenum  
Manifold Baffle  
Inner Plate  
Outer Plate  
Manifold  
Figure 1-5. Air Fingers, Showing High-Velocity Columns of Air Formed During Passage Through  
the Inner Plate and Outer Plate to Heat the Food Product.  
4
Download from Www.Somanuals.com. All Manuals Search And Download.  
SECTION 1  
DESCRIPTION  
III. COMPONENT FUNCTION (Figure 1-6)  
Figure 1-6. PS536ES-Series Oven Components Locations  
5
Download from Www.Somanuals.com. All Manuals Search And Download.  
SECTION 1  
DESCRIPTION  
III. COMPONENT FUNCTION  
A. Conveyor Motor and Conveyor Belt  
The conveyor belt is driven by a variable-speed electric  
motor(Figure1-7)operatingthroughagearreducer. The  
motor speed is controlled by a digital control. The stain-  
less-steelwirebeltcantravelineitherdirectionatvariable  
ratesrangingfrom3minutesto30minutes;thisisthetime  
that a product can take to pass through the oven.  
B. Blower Fan  
The blower fan is located at the rear of the oven. This  
blower forces heated air through the air fingers. The  
BLOWER/Heat switch must be set to ONor Ifor oven  
warmupandbaking.  
C.ElectricHeaters  
There is one heater element mounted on the inside of the  
left panel. The element is connected to an electrical  
control which is energized by the temperature controller.  
If the pilot flame does not light or a loss of flame occurs,  
the main gas valve closes.  
The main burner gas is extinguished when the HEAT  
switch is set to OFFor O.  
D. Window  
Awindowonthefrontoftheovenpermitsviewingtheitems  
beingbakedandprovidesaccesstotheovenforitemsthat  
do not require full baking time, such as sandwiches,  
cookies, small items, or cheese-melting processes.  
E. Cooling Fan — See Figure 1-8  
The cooling fans are located in the back of the oven.  
These cooling fans draw air through its grille, blowing it  
through the blower motor compartment and the control  
compartmentintotheoventopandexhaustedoutthefront  
louvers.  
F. Air Fingers and Blank Plates - See Figure 1-9  
F1. Air Fingers  
An Air Finger Assembly is made up of three parts:  
1.OuterPlate-TheOuterPlateistheremovablecovering  
with tapered holes, which direct the air stream onto the  
productbeingbaked.  
2.InnerPlate-TheperforatedInnerPlateisvitalinforming  
theuniqueairjets.Itmustbeassembledintothemanifold  
with its holes aligned with the holes of the outer plate.  
Figure 1-7. Machinery Compartment  
Components  
3. Manifold - The Manifold is the assembly which slides  
on tracks into the oven plenum.  
6
Download from Www.Somanuals.com. All Manuals Search And Download.  
SECTION 1  
DESCRIPTION  
Figure 1-8. Cooling Fan  
7
Download from Www.Somanuals.com. All Manuals Search And Download.  
SECTION 1  
DESCRIPTION  
F2. Blank Plates  
1. Blank Plates- The Blank Plates are available to install  
on the plenum where an air finger is not required.  
Half Blank Plate  
Outer Plate  
Inner Plate  
Blank Plate  
Finger  
Manifold  
Assembly  
Baffle  
Figure 1-9. Blank Plates (two sizes) and an Air Finger.  
8
Download from Www.Somanuals.com. All Manuals Search And Download.  
SECTION 2  
INSTALLATION  
SECTION 2  
INSTALLATION  
NOTE: The oven, when installed, must be electrically  
I. UNLOADING  
grounded in accordance with local codes, or in the ab-  
sence of local codes, with the National Electrical Code  
(NEC), or ANSI/NFPA70.  
YourMiddlebyMarshallPS536ES-SeriesOvenisshipped  
partially assembled. It will arrive in a carton on a crate.  
Carton size for a PS540-Series Oven is:  
58(2134mm)Long×  
NOTE  
There must be adequate clearance between  
the oven and any adjacent combustible con-  
struction. Clearance must also be provided  
for servicing and for operation.  
47.25(1473mm)Wide×  
36(1118mm) High ×  
Thecrateandcartonmustbeexaminedbeforesigningthe  
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  
initiatedbytheconsigneewithin10daysfromthedatethat  
the shipment is received.  
CAUTION  
It is required that the oven be placed under a  
ventilation hood for adequate air supply and  
ventilation.  
CAUTION  
APre-installationProceduresManual(MMP/N88910-0009)  
is attached to the exterior wall of the carton. This manual  
containsdetailedinstructionsonunpackingandmovingthe  
oven(s) to the operating site. When the transport company  
notifiesyouofanimpendingdelivery,arrangetohaveaforklift  
at your facility to unload the carton(s).  
Do not obstruct the flow of combustion and  
ventilation air to and from your oven. Do not  
obstructtheventilationholesintheControlPanel.  
CAUTION  
OnovenswiththeMachineryDriveCompartment  
located at the right end, a minimum clearance of  
0toaleftsidewall, 18toarightsidewalland6″  
from a back wall to air openings at the rear of the  
oven must be maintained. On ovens with the  
machinery/drive compartment located at the left  
end, a minimum clearance of 0to a right side  
wall, 18toaleftsidewalland6fromabackwall  
to air openings at the rear of the oven must be  
maintained.  
Instructions for stacking the ovens is continued in a  
separate manual used by Middleby Marshall Authorized  
Installers.  
If you have a door wider than the carton, simply move the  
carton into your facility and arrange an appointment with  
your Middleby Marshall Authorized Installer.  
If your door is narrower than the carton, then the oven will  
have to be unpacked. Follow the directions shown in the  
Pre-InstallationProceduresManual.  
For servicing and cleaning, a minimum of 18″  
clearance from all walls is recommended.  
9
Download from Www.Somanuals.com. All Manuals Search And Download.  
SECTION 2  
INSTALLATION  
PS536ES OVEN INSTALLATION  
REQUIRED KITS AND EQUIPMENT  
TYPE  
OF  
INSTALLATION  
PS536ES  
Single Oven  
Installation  
Kit P/N  
PS536ES  
Double Oven  
Installation  
Kit P/N  
PS536ES  
Triple Oven  
Installation  
Kit P/N  
PS536ES  
Additional Cavity  
Installation  
Kit P/N  
44919  
44920  
44921  
44974  
45529 (CE)  
45530 (CE)  
45531 (CE)  
45532 (CE)  
PS536ES Single Oven  
PS536ES Double Oven  
PS536ES Triple Oven  
1
1
2
3
1
1
10  
Download from Www.Somanuals.com. All Manuals Search And Download.  
SECTION 2  
INSTALLATION  
Figure 2-1 - Installation Kit  
I. INSTALLATION KIT - see Figure 2-1  
Qty.  
Qty.  
Qty.  
Triple  
Oven  
Inc. with  
domestic  
ovens?  
Inc. with  
CE  
ovens?  
Single Double  
Item  
Oven  
Oven  
Part No.  
Description  
1
1
1
1
2
1
--  
48605  
Yes  
Yes  
Yes  
Yes  
Yes  
Yes  
Yes  
Yes  
Top panel  
2
3
2
1
4
2
1
4
3A80A8801  
42893  
Screw, pan head #10 x 2  
Base pad  
4a  
42890  
17-1/2(445mm) leg extension, for single and  
double ovens  
4b  
4c  
4d  
5
--  
--  
--  
2
4
4
--  
2
2
--  
--  
4
2
2
45360  
45329  
Yes  
Yes  
Yes  
Yes  
Yes  
Yes  
Yes  
Yes  
Yes  
Yes  
20-1/2(521mm) leg extension, optional  
25-1/2(648mm) leg extension, optional  
6(152mm) leg extension, for triple ovens only  
Caster, with flat plate and brake  
44799  
22290-0009  
22290-0010  
6
2
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.  
7
8
9
4
1
4
1
4
1
22450-0028  
21392-0004  
220373  
No  
Yes  
Yes  
No  
Yes  
Yes  
Leg, adjustable, 6(152mm)  
Eyebolt, 3/4″  
Hex bolt, 3/8-16 x 1″  
A/R  
A/R  
A/R  
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.  
10  
11  
12  
13  
14  
15  
32  
32  
1
32  
32  
1
32  
32  
1
21416-0001  
21422-0001  
22450-0228  
50236  
Yes  
Yes  
Yes  
Yes  
Yes  
Yes  
Yes  
Yes  
Yes  
Yes  
Yes  
Yes  
Flat washer, 3/8″  
Lockwasher, 3/8″  
Restraint cable assembly  
Owner's Operating and Installation Manual  
Authorized Service Agency Listing  
Lower shelf  
1
1
1
1
1
1
1002040  
46393  
1
1
--  
11  
Download from Www.Somanuals.com. All Manuals Search And Download.  
SECTION 2  
INSTALLATION  
Figure 2-5. MODEL PS536ES SINGLE OVEN DIMENSIONS  
ELECTRICALJUNCTIONBOX  
1
2
2
RECOMMENDEDMINIMUMCLEARANCES:  
Rear of Oven to Wall - 6(150mm)  
Non-control End of Oven to Wall - 0″  
Control End of Oven to Wall - 0″  
2
2
1
12  
Download from Www.Somanuals.com. All Manuals Search And Download.  
SECTION 2  
INSTALLATION  
Figure 2-6. MODEL PS536ES DOUBLE OVEN DIMENSIONS  
1
2
ELECTRICALJUNCTIONBOX  
2
RECOMMENDEDMINIMUMCLEARANCES:  
Rear of Oven to Wall - 6(150mm)  
Non-control End of Oven to Wall - 0″  
Control End of Oven to Wall - 0″  
2
2
1
13  
Download from Www.Somanuals.com. All Manuals Search And Download.  
SECTION 2  
INSTALLATION  
ELECTRICALJUNCTIONBOX  
1
2
2
RECOMMENDEDMINIMUMCLEARANCES:  
Rear of Oven to Wall - 6(150mm)  
Non-control End of Oven to Wall - 0″  
Control End of Oven to Wall - 0″  
2
2
1
Figure 2-7. MODEL PS536ES TRIPLE OVEN DIMENSIONS  
RESTRAINT CABLE INSTALLATION  
Installtherestraintcableassemblyontheoven,asshown  
in Figure 2-6.  
Figure 2-8. Restraint Cable Assembly Installation  
14  
Download from Www.Somanuals.com. All Manuals Search And Download.  
SECTION 2  
INSTALLATION  
15  
Download from Www.Somanuals.com. All Manuals Search And Download.  
SECTION 2  
INSTALLATION  
II. VENTILATION GUIDELINES  
VENTILATION HOOD  
A mechanically driven ventilation system is required for  
the PS536ES Series Middleby Marshall conveyorized  
electricovens.Theminimumhoodcanopydimensionsare  
outlinedbelow.  
The rate of air flow exhausted through the ventilation  
system is generally between 1400 and 2500 cu. ft./min.  
(40 and 70 m3/min), but may vary depending on the oven  
configuration and hood design. To avoid a negative  
pressure condition in the kitchen area, return air must be  
brought back to replenish the air that was exhausted. A  
negative pressure in the kitchen can cause heat related  
problems to the oven components as if there were no  
ventilation at all. The best method of supplying return air  
is through the heating, ventilation and air conditioning  
system. Throughtheysystem,theaircanbetemperature  
controlled for summer and winter. Return air can be  
broughtindirectlyfromoutsidethebuilding,butdetrimen-  
talaffectscanresultfromeitherextremeseasonalhotand  
cold temperature from the outdoors.  
Local codes and conditions vary greatly from one area to  
another and must be complied with. Following are the  
suggested requirements for good ventilation. Please re-  
member these are recommendations or guidelines, you  
may have a special condition or problem that will require  
theservicesofaventilationengineerorspecialist. Proper  
ventilation is the oven owner’s responsibility. Improper  
ventilation can inhibit oven performance. It is recom-  
mendedthattheventilationandductworkbecheckedout  
everythreemonths. Greasefiltersintheintakeofthehood  
may be required by local codes.  
NOTE: Returnairfromfandrivensystemwithinthehood  
must not blow at opening of bake chamber or poor oven  
baking performance will result.  
Figure 2-10. Vent Hood  
16  
Download from Www.Somanuals.com. All Manuals Search And Download.  
SECTION 2  
INSTALLATION  
III. ELECTRICAL CONNECTION  
INFORMATION FOR PS536ES-SERIES  
OVENS.  
IV. ELECTRIC SUPPLY FOR  
ELECTRICALLY HEATED OVENS  
Power requirements for electrically heated ovens are  
usually208-240VAC,3-phase,4-wire(3hot,1ground),  
although ovens built for export can have power require-  
ments of 380VAC and 480VAC. (These ovens have a 5-  
wire system.) A 2(51mm) diameter cutout/hole in the  
back of the machinery compartment provides access for  
the electrical supply connections. Using flexible cable(s)  
for the electrical power supply conductors requires a 2″  
(51mm) strain-relief fitting (not furnished) to enable safe  
access to the terminal block from which oven power is  
distributed.  
WARNING  
Authorized supplier personnel normally accom-  
plish the connections for the ventilation system,  
electric supply, and gas supply, as arranged by  
the customer. Following these connections, the  
factory-authorizedinstallercanperformtheinitial  
startup of the oven.  
The supply conductors must be of the size and material  
(copper) recommended to provide the current required;  
(refertothedataplatefortheamperespecifications).The  
electric current rating for each conductor supplying a  
PS536ES-SeriesOvenmustcomplytolocalandnational  
codes.  
Checktheovendataplate(Figure2-11)beforemakingany  
electric supply connections. Electric supply connections  
must agree with data on the oven data plate.  
NOTE: The electric supply installation must satisfy the  
requirements of the appropriate statutory authority, such  
as the National Electrical Code (NEC), ANSI/NFPA70,  
(U.S.A.); the Canadian Electrical Code, CSA C22.2; the  
Australian Code AG601; or other applicable regulations.  
TypicalspecificationsforeachPS536ES-SeriesOvenare  
208V or 240V, 3-phase, 4-wire, 60-ampere, 17kW; this  
oven requires 60-ampere service. A PS536ES-Series  
DoubleOven(Figure1-2)installationwouldrequiretwo60-  
ampereserviceconnections,oneforeachoven;the17kW  
powerconsumptionalsodoublesforsuchaninstallationto  
34kW.  
A fused disconnect switch or a main circuit breaker  
(customer furnished) MUST be installed in the electric  
supply line for each oven; it is recommended that this  
switch/circuitbreakerhavelockout/tagoutcapability.The  
electricsupplyconnectionmustmeetallnationalandlocal  
electricalcoderequirements.Copperistherecommended  
material for the electrical supply conductors.  
The 208V or 240VAC electrically heated oven uses two  
legs of the supplied power to provide 208V or 240VAC  
power for the oven control circuitry.  
Figure 2-11. Typical Electric Oven Data Plate  
Figure 2-12. Junction Connection Box  
17  
Download from Www.Somanuals.com. All Manuals Search And Download.  
SECTION 2  
INSTALLATION  
VI. CONVEYOR REAR STOP AND END  
STOP INSTALLATION  
Locate the conveyor rear stop and end stop in the  
installationkit.Installtherearstopandendstopattheexit  
end of the oven. See Figure 2-13.  
Figure 2-13. Installing Rear and End Stops  
18  
Download from Www.Somanuals.com. All Manuals Search And Download.  
SECTION 3  
OPERATION  
SECTION 3  
OPERATION  
I. CONTROL FUNCTIONS  
Figure 3-1. PS536ES-Series Oven Control Functions  
WARNING  
A possibility of injury from rotating parts and  
electric shock exists in this oven.  
Never disassemble or clean the oven with the  
BLOWER/HEAT switch or any other oven control  
turned “ON” or “I”. Turn “OFF” or “O” and lockout  
or tagout all electric power to the oven before  
attempting to clean or service this oven.  
19  
Download from Www.Somanuals.com. All Manuals Search And Download.  
SECTION 3  
OPERATION  
burnercannotlight,iftheairswitchdoesnotsenseairflow  
off the main blower fan.  
II. COMPONENT INFORMATION AND  
LOCATION (Figures 3-1 and 3-2)  
C. Heat Switch  
A. Door Safety Switch  
Turning the HEAT switch to “ON” or“I” will initially set up  
the oven purge circuit. After approximately 30 seconds,  
the burner lights. After the burner is lit, a flame sensor  
sends a signal to the ignition module to stop the spark.  
The burner will run unless the flame sensor does not  
detect a flame or the heat switch is turned to the “OFF”  
or “O” position.  
The Door Safety Switch is located at the lower left side of  
control panel opening. Opening the control panel door  
permits this switch to open, disconnecting power to all  
electrical controls.  
CAUTION  
Do NOT touch the wires going to this safety switch.  
Current is always present.  
TheHEATswitchisinserieswiththeburnerblowermotor  
centrifugal switch, the high-temperature safety switch,  
and the blower fan air pressure switch. All three safety  
switches must be closed for gas to flow and the burner to  
light.  
B. Blower Switch  
The blower switch has two positions. The switch must be  
“ON” or “I” for the burner to come on and permit the oven  
towarmup.Thefancirculatestheairthroughouttheoven  
and must stay on during baking and during the cool down  
cycle above 200°F (93°C) to prevent blower bearing  
damage. To protect the blower motor and bearings a  
thermostaticoverrideisbuiltintotheoven.Ifthetempera-  
tureinsidetheovenisover180°F(82°C)themainblower  
will continue to run after the blower switch is turned to the  
“OFF” or “O” position.  
D.TemperatureController  
The temperature controller is a solid-state, on/off type to  
maintain the operator-set temperature. The temperature  
controllercontinuouslymonitorstheoventemperatureand  
turns on the modulating solenoid valve in a gas-heated  
oven. The heat is on for the time required to maintain a  
constantoventemperature.  
The temperature controller contains a low-limit switch  
whichallowstheoventocooldownto200°F(93°C)before  
shutting off the blower. A high-limit indication (ALM 1) will  
appear on the display if the oven reaches 650°F (343°C).  
An air pressure switch monitors the air flow from the  
blower, acting as a safety interlock for the burner. The  
Figure 3-2. Interior View of Machinery Compartment and Control Console  
20  
Download from Www.Somanuals.com. All Manuals Search And Download.  
SECTION 3  
OPERATION  
E. Conveyor  
The on-off switch for the conveyor motor is on the control  
panel. Also on the control panel is the digital conveyor  
speed control. The digital control can be adjusted from 3  
min. to 30 min. bake time (conveyor speed). Refer to  
Figure3-3.  
Conveyor speed is measured by the amount of time it  
takes for an item to go through the bake chamber of the  
oven.  
MEASURING CONVEYOR SPEED.  
See Figures 3-4 and 3-5.  
Figure 3-3. Conveyor Speed Digital Control  
To check conveyor speed, place a product item at the  
entranceendofbakingchamberasshown.Timehowlong  
it takes for the leading edge of the item to go from the  
entrance end of the baking chamber to the exit end. This  
should be the conveyor speed shown on the conveyor  
speed digital control.  
NOTE: In Figures 3-4 and 3-5, the oven shown is with the  
conveyor running right to left.  
WARNING  
Possibility of injury from rotating parts and  
electrical shock exist in this oven.  
Never disassemble or clean the oven with the  
BLOWER/HEAT switch or any other part of the  
oven turned “ON” or “I”. Turn “OFF” or “O” and  
lockout or tagout all electrical power to the  
oven before attempting to clean or service  
this oven.  
Figure 3-4. Product at entrance end of baking  
chamber – BEGINNING OF TIMING  
Figure 3-5. Product at exit end of baking  
chamber – END OF TIMING  
21  
Download from Www.Somanuals.com. All Manuals Search And Download.  
SECTION 3  
OPERATION  
4. Set the temperature controller to the desired baking  
temperature. See section on bake times to determine  
desiredtemperature.  
WARNING  
OVEN MUST BE KEPT CLEAR OF  
COMBUSTIBLES AT ALL TIMES.  
NOTE: For complete temperature controller operation  
instructions refer to Step C.  
5. Turn the HEAT switch (Figure 3-6) to the “ON” or “I”  
position. This completes a circuit to supply electric power  
to the electric heating system.  
III. STEP-BY-STEP OPERATION  
Control Panel (On split belt ovens, two conveyor speed  
controls are mounted on the control panel.)  
6. Closefrontwindow.  
A.StartupProcedures  
DailyStartup  
7. Ovenwillreachabakingtemperatureof500°F(232°C)  
in approximately 10 minutes. Allow the oven to cycle for  
30minutesafterithasreacheddesiredbaketemperatue.  
The oven is now ready for baking.  
1. Turn the BLOWER/HEAT switch (Figure 3-6) to the  
“ONorIposition.Thisstartsthemainblowerfanandthe  
coolingfan.Theblowercirculatesairthroughtheairfingers  
and must stay on during the cooking or baking process.  
Power Failure  
In case of power failure, turn off all switches; open oven  
window and remove product. After power has been  
reestablishedfollownormalstartupprocedure.  
2. Checktoseeifthecoolingfan(seeFigure1-8)isoperating  
whentheBLOWER/HEATswitch(seeFigure3-6)isturned“ON”  
orI”.Thecoolingfanscoolthecontrolcomponentsandburner  
blowermotor.Thecoolingfan,locatedattherearoftheelectrical  
control cabinet blows air into and through the cabinet. Air is  
exhaustedthroughthefrontofthecabinetandalsooutthefront  
of the oven. Refer to Daily Maintenance Section for fan intake  
checkingprocedure.  
B. ShutdownProcedure  
1. Turn the BLOWER/HEAT switch to “OFF” or “O”.  
NOTE: Theblowerswillremainonuntiltheoventempera-  
turecoolsdownto200°F(93°C)atwhichtimetheywillstop  
automatically.  
IMPORTANTNOTE  
2. Make certain that there are no products left on the  
conveyor inside the oven. Turn the CONVEYOR switch  
to “OFF” or “O”.  
The cooling fan operates when the BLOWER/  
HEATswitchisturnedONorI”.Itmustoperate  
to keep the control console below 140°F (60°C).  
3. Open the oven window.  
3. TurntheCONVEYORswitch(Figure3-6)totheONor  
“I” position. This starts the conveyor belt moving through  
the oven. Set the conveyor speed for the desired baking  
time. Refer to the following Procedures E, F and G.  
22  
Download from Www.Somanuals.com. All Manuals Search And Download.  
SECTION 3  
OPERATION  
E
D
B
A
C
Figure 3-6. Control Panel  
I. LOCATION AND DESCRIPTION OF CONTROLS  
A.  
"BLOWER" Switch: Turns the blowers and  
cooling fans on and off. The HEAT Switch has  
no effect unless the BLOWER Switch is in the  
“ON” position.  
Digital Temperature Controller: Continuously  
monitors the oven temperature. Settings on the  
Digital Temperture Controller control the activa-  
tion of the burner. Keypad controls allow the  
operator to select the cooking temperature and  
monitor oven operation.  
E.  
B.  
"HEAT" Switch: Allows the burner to activate.  
Activation is determined by the settings on the  
Digital Temperature Controller.  
NOT SHOWN:  
F. Machinery and Control Compartment Safety Switches:  
Disconnect electrical power to the controls and blowers  
when EITHER the machinery compartment door OR the  
control compartment door is opened. The doors should  
only be opened by authorized service personnel.  
C.  
D.  
"CONVEYOR"Switch: Turnstheconveyordrive  
motor on and off.  
Conveyor Speed Controller: Adjusts and dis-  
plays the bake time. Single-belt ovens have one  
controller. Split belt ovens have one controller  
for each conveyor belt, labeled "FRONT" and  
"BACK."  
23  
Download from Www.Somanuals.com. All Manuals Search And Download.  
SECTION 3  
OPERATION  
7. Wait for the oven to heat to the setpoint temperature. Higher  
setpoint temperatures will require a longer wait. The oven  
can reach a temperature of 500°F (232°C) in approximately  
5 minutes.  
II. NORMAL OPERATION - STEP-BY-STEP  
A. DAILYSTARTUPPROCEDURE  
1. Check that the circuit breaker/fused disconnect is in the on  
position. Check that the window is closed.  
8. (Optional)PresstheTem-  
perature ( ) key to show  
the Actual Temperature  
in the display, and wait  
for the "ACTUAL TEMP"  
light to turn on. This al-  
lows you to monitor the  
oven temperature as it  
rises to the setpoint.  
wait  
for  
2. Turn the "BLOWER" (  
)
switch to the ON("I")  
position.  
9. Allow the oven to preheat for 10 minutes after it has reached  
the set point temperature.  
3. Turn the "CONVEYOR"  
(
) switch to the ON”  
("I") position.  
B. DAILYSHUTDOWNPROCEDURE  
1. Turnthe"HEAT"( )and  
"BLOWER" ( ) swit-  
ches to the "OFF" ("O")  
position. Note that the  
4. If necessary, adjust the  
conveyor speed setting  
+
blowers will remain in op-  
eration until the oven has  
cooled to below 200°F  
(93°C).  
by pressing the  
or  
or  
pushbuttons on the con-  
veyor speed controller to  
change the displayed  
bake time.  
2. Make certain that there  
are no products left on  
the conveyor inside the  
oven. Turn the "CON-  
5. Adjust the temperature  
controller to a desired set  
temperature, if neces-  
sary.  
wait  
for  
VEYOR" (  
) switch to  
the "OFF" ("O") position.  
+
Press the Set Point  
and Unlock keys at  
the same time. Wait  
forthe"SETPT"light  
to turn on.  
3. Open the window to allow the oven to cool faster.  
4. After the oven has cooled and the blowers have turned off,  
switch the circuit breaker/fused disconnect to the off posi-  
tion.  
Press the Up Arrow  
and Down Arrow  
Keys as necessary  
to adjust the set-  
point.  
IMPORTANT  
or  
On gas ovens, if the "HEAT ON" light will not illuminate, OR  
if the oven does not heat, the gas burner may not have lit.  
Turn the "HEAT" ( ), "BLOWER" ( ), and "CONVEYOR"  
(
) switches to the "OFF" ("O") position. Wait for AT  
LEAST FIVE MINUTES before restarting the oven. Then,  
repeat the Daily Startup procedure.  
6. Turn the "HEAT" (  
)
switch to the "ON" ("I")  
position, and wait for the  
"HEAT ON" light to turn  
on.  
CAUTION  
In case of power failure, turn all switches to the OFF("O")  
position, open the oven window, and remove the product.  
After the power has been restored, perform the normal  
startup procedure. IF THE OVEN WAS SWITCHED OFF  
FOR LESS THAN 5 MINUTES, WAIT FOR AT LEAST FIVE  
MINUTES BEFORE RESTARTING THE OVEN.  
wait  
for  
Theburnerwillnotoperateandgaswillnotflowthrough  
theburnerwithoutelectricpower. Noattemptshouldbe  
made to operate the oven during a power failure.  
24  
Download from Www.Somanuals.com. All Manuals Search And Download.  
SECTION 3  
OPERATION  
III. QUICK REFERENCE: DIGITAL TEMPERATURE CONTROLLER  
Display  
"HEAT ON"  
Shows the Set Point  
or the Actual Tem-  
perature in degrees  
Fahrenheit (F) or  
Celsius (C).  
Light  
Lights when the  
burner is in  
operation.  
"SP LOCK"  
Light  
Lights when the  
set point is locked  
out from changes.  
This setting can  
only be changed by  
service personnel.  
"SET PT"  
(setpoint)  
Light  
Lights when the  
set point is shown  
in the display.  
OVERTEMP  
Light  
"ACTUAL  
Lights when the oven  
temperature is  
TEMP" Light  
Lights when the  
Actual Tempera-  
ture is shown in  
the display.  
greater than 650°F  
(343°C). Refer to  
Quick Reference:  
Troubleshooting in  
this section.  
Service Key  
Serviceuse  
only.  
Temperature  
Key  
Press this key once  
to view the Actual  
Temperature in the  
Display.  
Set Point Key  
Press this key  
together with the  
Unlock Key to allow  
the Set Point to be  
changed.  
Changes can only be  
made for 60 sec-  
onds.  
Unlock Key  
Press this key  
Up Arrow and Down  
together with the Set  
Point Key to allow the  
Set Point to be  
changed. Changes  
can only be made for  
60 seconds.  
Arrow Keys  
Press these keys to  
adjust the Set Point up or  
down. If the Set Point will  
not change, refer to Set  
Point Key and Unlock Key  
in this section.  
25  
Download from Www.Somanuals.com. All Manuals Search And Download.  
SECTION 3  
OPERATION  
IV. QUICK REFERENCE: TROUBLESHOOTING  
SYMPTOM  
PROBLEM  
SOLUTION  
The oven temperature ex-  
ceeded650°F(343°C), and  
the burner was automati-  
cally shut down.  
Follow the procedures under Daily Shutdown Procedures in  
this section to shut down the oven. Contact your Middleby  
MarshallAuthorizedServiceAgenttodetermineandcorrectthe  
cause of the condition to prevent damage to the oven.  
light is lit, food product is  
undercooked  
Oven will not  
turn on at all  
Electrical power may not be  
reaching the oven, or the  
controls may be set incor-  
rectly.  
Check that the circuit breaker/fused disconnect is turned on.  
Check that the "BLOWER" ( ) Switch is in the ON("I")  
position. The burner cannot engage until the blowers are in  
operation.  
Oven shuts down shortly  
after it is turned on  
The gas burner did not light  
within 90 seconds of turn-  
ing the "HEAT" ( ) Switch  
to the ON("I") position.  
This automatically en-  
gages a safety lockout  
mode.  
Turn the "HEAT" ( ), "BLOWER" ( ), and "CONVEYOR"  
(
)switches to the "OFF" ("O") position.  
Wait for AT LEAST FIVE MINUTES before restarting the oven.  
Repeat the Daily Startup procedure.  
The oven did not reach  
200°F (93°C) within 15 min-  
utesofstartup,andtheoven  
has stopped heating.  
Turn the "HEAT" ( ), "BLOWER" ( ), and "CONVEYOR"  
(
)switches to the "OFF" ("O") position.  
Wait for AT LEAST FIVE MINUTES before restarting the oven.  
Repeat the Daily Startup procedure.  
appears in display,  
oven is not heating  
Controls may be set incor-  
rectly.  
Check that the Set Point is correctly set.  
Oven will not heat  
Checkthatboththe"BLOWER"( ) and"HEAT"( )Switches  
are in the ON("I") position.  
If the oven still will not heat,turn the "HEAT" ( ), "BLOWER"  
(
), and "CONVEYOR" (  
)switches to the "OFF" ("O")  
position.  
Wait for AT LEAST FIVE MINUTES before restarting the oven.  
Repeat the Daily Startup procedure. Check that the Set Point  
is above 200°F (93°C).  
Oven is operating, but  
little or no air is blowing  
from air fingers  
Air fingers may have been  
reassembled incorrectly  
after cleaning.  
Turn the oven to the OFFor Oposition, and allow it to cool.  
Disconnect electrical power to the oven.  
Refer to Section 4, Maintenance, for instructions on reassem-  
bling the air fingers.  
Conveyor moves with a  
jerky motion, or will not  
move at all  
Conveyor may be jammed  
on an object in the oven, or  
conveyor belt or drive chain  
tension may be incorrect.  
Turn the oven to the OFFor Oposition, and allow it to cool.  
Disconnect electrical power to the oven.  
Check if the conveyor is blocked by an object inside the oven.  
Refer to Section 4, Maintenance, for instructions on checking  
the conveyor and drive chain tension.  
Food products are  
overcooked or  
undercooked.  
Controls may be set incor-  
rectly.  
Check that the set temperature and bake time settings are  
correct.  
IFTHESESTEPSFAILTORESOLVETHEPROBLEM,CONTACTYOURLOCALMIDDLEBYMARSHALL  
AUTHORIZED SERVICE AGENT. A SERVICE AGENCY DIRECTORY IS SUPPLIED WITH YOUR OVEN.  
26  
Download from Www.Somanuals.com. All Manuals Search And Download.  
SECTION 4  
MAINTENANCE  
SECTION 4  
MAINTENANCE  
WARNING  
Possibility of injury from rotating parts and electrical  
shock exist in this oven. Turn off and lockout or tagout  
electrical supply to oven(s) before attempting to  
disassemble, clean or service oven(s). Never disas-  
semble or clean the oven with the blower switch or any  
other part of the oven turned on.  
WARNING  
Before performing any maintenance work or cleaning,  
turn main power switch off.  
CAUTION  
When cleaning do not use any abrasive cleaning  
materials or water spray, wipe clean only. Never use a  
water hose or pressurized steam cleaning equipment  
when cleaning this oven.  
NOTICE  
If the oven is to be removed from its installed location  
for servicing, perform the following procedure:  
1. Switch off the oven and allow it to cool. Do NOT  
service the oven while it is warm.  
2. Turn off main circuit breakers and disconnect  
connector from oven.  
3. Turn the adjustable legs to put weight on the  
casters.  
4. Move oven to desired location for servicing.  
5. When servicing is complete, move oven to original  
location.  
6. Adjust legs to level oven and take weight off  
casters.  
7. Connect electrical and gas connectors to oven.  
8. Turn on main circuit breakers.  
9. Follow normal startup instructions.  
27  
Download from Www.Somanuals.com. All Manuals Search And Download.  
SECTION 4  
MAINTENANCE  
D. Crumb Pans (Figure 4-2)  
I. MAINTENANCE - DAILY  
Removeandcleanthecrumbpanateachendoftheoven.  
Each crumb pan can be removed by sliding it out, as  
shown in Figure 4-2. Reinstall the crumb pans after  
cleaning.  
A. Exterior  
Everyday you should clean the outside of the oven with a  
soft cloth and mild detergent.  
E. Window  
The window can be cleaned daily while it is in place.  
WARNING  
Never use a water hose or pressurized steam  
cleaning equipment when cleaning the oven.  
B. Cooling Fan  
1. TWO COOLING FAN GRILLES AT THE REAR OF  
EACH OVEN CONTROL COMPARTMENT MUST BE  
CLEANED DAILY - Clean grilles with a stiff nylon type  
brush.  
2. Check the air intake of the cooling fan daily. The best  
time to check is right after starting the oven.  
IMPORTANTNOTE  
Thecoolingfanoperateswhentheblowerswitch  
is turned to “ON” (“I”). It must operate to keep the  
electrical control cabinet below 140°F (60°C).  
WARNING  
IF FAN BLADE IS NOT ROTATING, BROKEN,  
OR FAN ASSEMBLY IS MISSING FROM MAIN  
BLOWERMOTORSHAFT,DONOTOPERATE  
OVEN. REPLACE COOLING FAN BLADE  
BEFOREOPERATINGOVEN.Seriousdamage  
could be done to the burner blower motor and/or  
solid-state electrical components if oven is  
operated while cooling fan is not running or vent  
grille is plugged.  
Figure 4-1. Oven Cooling Fans  
3. Using a stiff nylon brush clean control compartment  
ventgrille.Hotairfromcontrolcompartmentexitsfromthis  
grille.  
C. Conveyor Belt (Figure 4-2)  
Everyday, just after starting the oven, stand at the  
unloading end of the conveyor, and with a brush, remove  
foodparticles(crumbs, etc.)clingingtotheconveyorbelt,  
brushing them into the crumb pan.  
Figure 4-2. Conveyor Belt and  
Crumb Pan Cleaning  
28  
Download from Www.Somanuals.com. All Manuals Search And Download.  
SECTION 4  
MAINTENANCE  
deposits use a non-caustic cleaner that will not react with  
the aluminized finger manifold surfaces.  
II. MAINTENANCE - MONTHLY  
NOTE: The oven interior may require cleaning more  
than once a month depending on the volume of  
baking.Tocleantheinterior,youhavetodisassemble  
some parts of the oven.  
You can order non-caustic cleaner from your local autho-  
rizedMiddlebyMarshallPartsDistributorinthequantities  
listed below:  
Part #  
Quantity  
When cleaning your Series PS536ES Oven note the  
following:  
27170-0244  
27170-0246  
Case of Quarts (6)  
Case of Gallons (4)  
PRECAUTIONS-  
1. Do not use excessive water or saturation of oven  
insulation will occur.  
A. Removing Conveyor From Oven For Cleaning  
1. Remove crumb pans as shown in Figure 4-2.  
2. Do not use a caustic oven cleaner or the aluminized  
finger manifold surfaces will be severely damaged.  
2. Remove upper and lower end plugs from each end of  
ovenbyremovingthetwowingscrewsfromeachendplug.  
When cleaning your oven, first remove all heavy debris  
withavacuumcleaner.Useadampclothforlightcleaning.  
For heavier cleaning of baked on grease and carbon  
3. Remove the conveyor end stop and the conveyor rear  
stop(Figure4-3).  
Figure 4-3.  
29  
Download from Www.Somanuals.com. All Manuals Search And Download.  
SECTION 4  
MAINTENANCE  
4. Remove conveyor drive chain cover as shown.  
5. Removetensionfromdrivechainbyliftingandpushing  
the conveyor slightly into the oven. Remove drive chain  
from conveyor drive sprocket as shown.  
NOTE: The split belt conveyor assembly can only be  
removed from the drive end of the oven.  
6. Begin sliding conveyor out of the oven as shown.  
Figure 4-4.  
Figure 4-7.  
7. Continue sliding the conveyor completely out of the  
oven,folditinhalfandthenplaceittothesideforcleaning.  
Be careful not to bump drive sprocket while handling  
conveyor or damage may result to drive shaft.  
Figure 4-5.  
Figure 4-8.  
CAUTION  
Be careful not to bump the drive sprocket while  
handling the conveyor, to avoid damaging the  
drive shaft.  
Figure 4-6.  
30  
Download from Www.Somanuals.com. All Manuals Search And Download.  
SECTION 4  
MAINTENANCE  
B. Air Fingers Disassembly For Cleaning  
1. Astheairfingersareremoveduseafeltpentomarkall  
partsofthefingers.Thisincludesthefingermanifold,inner  
plate and the outer plate (refer to Figure 1-9). If a blank or  
choke plate is used, mark that plate also. Fingers are  
markedintheordershown;asviewedfromthefrontofthe  
oven. (The marks for an upper oven should be preceded  
with a “U”, example UB1, UT2, etc.)  
T1  
B1  
T2  
B2  
T3  
B3  
T4  
B4  
Standard Fingers  
2. Slide blank plates straight out.  
Figure 4-10.  
4. Withairfingersout,placetheminanuprightpositionto  
remove the outer plate.  
5. Gentlystepothelipofthefingerandpulltheouterplate  
off.  
Figure 4-9.  
3. Remove air fingers.  
NOTE:Someovenusersrequireacustomfingerarrange-  
ment where the quantity of air fingers may vary.  
You can remove top and bottom fingers and blank plates  
from each or either end. It is highly recommended that  
each finger be marked before removing so it is placed in  
exactly the same position when reassembled  
(refer to step 1).  
Removetheairfingers,pullthefingeratthebackside-pull  
straight out.  
Figure 4-11.  
31  
Download from Www.Somanuals.com. All Manuals Search And Download.  
SECTION 4  
MAINTENANCE  
6. Toremovetheinnerplate,pulltheplateoutandthenup.  
D. Reassembly of Air Fingers  
1. Air fingers are made up of one inner plate, one outer  
plateandthefingerhousingmanifold.Besuretomatchup  
the markings (T1, T2, T3, etc.) on all the parts of the air  
fingers as you are reassembling.  
Figure 4-12.  
7. The outer finger plate is stainless and may be cleaned  
by either soaking in a hot, strong detergent solution or  
using a caustic cleaner. The conveyor belt can also be  
cleaned in the same way.  
Figure 4-15.  
2. Reassembletheinnerplate.Keepyourfingersclearso  
you won’t pinch them. The inner plate of a finger will only  
go in one way because of its design.  
3. Replace the outer plate by placing your hands flat on  
the top of the plate and pushing down. Keep your fingers  
clear so you won’t pinch them.  
Figure 4-13. Standard Lower Finger  
Figure 4-16.  
Figure 4-14. Standard Upper Finger  
C. Cleaning the Window  
The window can be cleaned in place.  
32  
Download from Www.Somanuals.com. All Manuals Search And Download.  
SECTION 4  
MAINTENANCE  
4. Replace the air fingers by pushing in at the back side.  
Remember to replace them according to the numbers  
marked on them when they were removed. They must go  
IMPORTANT: Only M6 Fingers fit in the bottom  
row. All M3 and M1 finger cover plates have  
extended lips at front. This extended lip will not  
allowthesefingerstobeinstalledinthebottomrow.  
IMPORTANT: When inserting fingers the tab on  
theouterplatemustbeinthegrooveasshownin  
Figure4-18.Thereisablockingtabontheoutside  
of the groove which will prevent inserting the  
finger in the groove if the outer plate is moved  
away from the flange of the finger manifold.  
back in the same way they came out.  
Figure 4-17.  
Extended Lip  
Tab on  
Outer Plate  
Flange of  
Finger Manifold  
Tab on  
Outer Plate  
Figure 4-18.  
33  
Download from Www.Somanuals.com. All Manuals Search And Download.  
SECTION 4  
MAINTENANCE  
5. Install fingers and blank plates correctly with edges  
interlocked and no space between edges.  
Incorrect - Too  
Much Space  
Top Finger  
Blank Plate  
Tab on Outer Plate of Finger  
Located in Groove  
Incorrect - Too  
Much Space  
Top Finger  
Blank Plate  
Tab on Outer Plate of Finger  
Located in Groove  
Correct -  
Edges Overlap  
Completely  
Top Finger  
Blank Plate  
Tab on Outer Plate of Finger  
Located in Groove  
Figure 4-19.  
34  
Download from Www.Somanuals.com. All Manuals Search And Download.  
SECTION 4  
MAINTENANCE  
E. Reinstall End Plugs  
1. Reinstall lower end plug. Be sure to tighten two wing  
screws on the end plug.  
2. Reinstall conveyor.  
3. Reinstall upper end plug. Be sure to tighten two wing  
screws on the end plug.  
Figure 4-20.  
Figure 4-21.  
35  
Download from Www.Somanuals.com. All Manuals Search And Download.  
SECTION 4  
MAINTENANCE  
F. ConveyorReassemblyIntoOven  
G. CheckingConveyorBeltTension  
1. Lift conveyor and position it in oven as shown.  
WARNING  
NOTE: Conveyor assembly may be inserted into either  
end of oven. If it is to be installed from the non-drive end  
oftheoventhedrivesprocketassemblymustberemoved  
as shown in conveyor disassembly section.  
Ovenconveyorbeltmustbecoolwhenadjusting  
belt. Do not adjust belt if HOT.  
1. With the conveyor assembly in the oven, stand at one  
endofconveyorandchecktensionbyliftingtheconveyor  
belt at the center of the oven chamber opening. The belt  
should not lift higher that 3to 4(75mm to 102mm).  
NOTE: Split belt conveyors can only be inserted from the  
drive end of the oven.  
2. Adjust conveyor belt tension screws (located on left  
end of oven) for the 3to 4(75mm to 102mm) deflection  
asshowninFigure4-26.Ifthereispropertension,proceed  
to “J. Attaching Drive Chain”. If belt is still too loose,  
continue to step 3 below.  
3. If conveyor belt is still not under proper tension, an  
entirelinkmustberemoved. Usethefollowingprocedure  
“H. Conveyor Belt Link Removal” to remove a link. If  
conveyor belt is under proper tension proceed directly to  
“J. Attaching Drive Chain”.  
Figure 4-22.  
2. Reinstall the conveyor rear stop. Reinstall the con-  
veyor end stop.  
Conveyor Rear Stop  
Conveyor End Stop  
Figure 4-24.  
Figure 4-23.  
36  
Download from Www.Somanuals.com. All Manuals Search And Download.  
SECTION 4  
MAINTENANCE  
H. ConveyorBeltLinkRemoval  
4. Unhook the link to be removed.  
1. Using long nose pliers, an entire link can be removed  
with the conveyor assembly either in or out of the oven.  
Position master links at end of conveyor as shown in  
Figure4-25.  
5. Pull up on the belt link section and remove. Do not  
discard the link removed as it may be used for making  
spare master links.  
NOTE: If a section of the conveyor belt is being replaced  
it should be done now. Remove the links that need  
replacingandusethesectionofconveyorbeltfurnishedin  
your installation kit to replace them.  
Master  
Links  
Figure 4-25.  
2. Using long nose pliers, unhook master links at left end  
of conveyor as shown in Figure 4-26.  
Figure 4-28.  
NOTE: Before connecting the inside master links, notice  
thattheselinkshaveacorrectposition(Figure4-29). The  
link at the right is in the correct (horns up) position for  
insertingintotheconveyorbelt.Thehornsfacingdownare  
in the incorrect position.  
Correct  
Position  
Incorrect  
Position  
Figure 4-26.  
3. Remove the outside master links on the right and left  
sides of the conveyor belt as shown in Figure 4-27.  
Figure 4-29.  
Figure 4-27.  
37  
Download from Www.Somanuals.com. All Manuals Search And Download.  
SECTION 4  
MAINTENANCE  
6. Reconnect the inside master links (Figure 4-30.)  
I. ReplacingConveyorBelt  
If a section of the conveyor belt needs replacing it can be  
done with the conveyor assembly either in or out of the  
oven. The section of the conveyor belt furnished with the  
oven in the installation kit may then be used to replace a  
section.FollowtheprecedingprocedureH.Conveyorbelt  
link removalwhich outlines the disassembly procedure.  
J. AttachingDriveChain  
1. Ifdrivesprocketassemblywasremovedreassembleit  
into the conveyor drive shaft. Be sure flat on end of drive  
shaft aligns with set screw in conveyor shaft collar. Once  
in place tighten 3/32set screw.  
2. Lift conveyor and install drive chain to conveyor drive  
sprocket and motor sprocket.  
Figure 4-30.  
NOTE: The outside master links have right and left sides  
to them. The right edge master link has an open hook  
facingyouasshowninFigure4-31.Thiswillmatchupwith  
theouteredgesoftheconveyorbelt.Rememberthishook  
travels backwards on the conveyor.  
Direction of travel  
Figure 4-33.  
Figure 4-31.  
3. The angle plate located on the underside of the con-  
veyor must be against the lower end plug. This is true on  
both sides of oven.  
7. Reconnect the outside master links.  
8. Replace all parts removed from the oven.  
CrumbPan  
Mounting  
Bracket  
Figure 4-32.  
LowerEndPlug  
Figure 4-34.  
38  
Download from Www.Somanuals.com. All Manuals Search And Download.  
SECTION 4  
MAINTENANCE  
4. Reassemble conveyor drive chain cover and then  
reassemble the bottom cover to the drive chain cover.  
III. MAINTENANCE - EVERY 3 MONTHS  
Install both upper end plugs.  
WARNING  
ShutOFFallelectricalpowerandlock/tagoutthe  
switch before attempting maintenance work.  
Shut OFF gas supply to oven.  
NOTE: It is recommended that the 3-month mainte-  
nancebeperformedbyanauthorizedMiddlebyMarshall  
technician.  
A.  
Cleaning the Blower/Fan Motor  
To gain access to the blower/fan motor, open the control  
cabinet door by removing the three screws. Clean the  
motor,burnerblowermotor,theconveyordrivemotorand  
thesurroundingarea,usingeithercompressedairorCO2.  
Thoroughly blow out the motor compartment and vents  
insidethemotor(Figure4-38).Failuretodothiscancause  
premature failure of blower fan motor.  
Figure 4-35.  
CAUTION  
Not cleaning the blower/fan motor properly can  
causeprematurefailure.  
Figure 4-36.  
39  
Download from Www.Somanuals.com. All Manuals Search And Download.  
SECTION 4  
MAINTENANCE  
B. ElectricalTerminals  
C. Ventilation  
Open the control cabinet door by removing the three  
screwsfromthecontrolcabinetdoor.Tightenallelectrical  
control terminal screws including the electrical contactor  
terminal screws as shown in Figure 4-37.  
Check that the air circulation throughout the oven is not  
blocked and is working properly.  
Figure 4-37.  
Figure 4-38.  
40  
Download from Www.Somanuals.com. All Manuals Search And Download.  
SECTION 4  
MAINTENANCE  
D. Split-belt Conveyor Shaft Cleaning  
4. Droptheidlershaftassemblyclearoftheframethrough  
the front frame slot.  
It is very important that the split-belt conveyor drive and  
idler shafts are removed from the conveyor frame for  
cleaningandlubrication.  
CAUTION  
Use a turbine oil or light machine oil. DO NOT  
USE WD40 or similar product. These oils  
evaporate and cause the shafts to seize.  
1. Perform the conveyor removal steps described in  
Monthly Maintenance, paragraph A. After the conveyor  
is removed, lay it on a flat surface.  
Figure 4-40.  
2. Remove the two conveyor belts by disassembling the  
conveyor master links, as described in Monthly Mainte-  
nance, paragraph H. Then, remove the two conveyor  
belts by rolling them up.  
5. Pullthefrontandrearshaftsapartandapplyoiltoboth  
the extended shaft and the interior of the hollow shaft.  
Using a rag, wipe oil off parts. Repeat until shafts are  
clean. Apply more oil to shafts then reassemble.  
3. Remove the conveyor adjustment bolts to allow the  
idler brackets to swing free.  
Figure 4-41.  
Figure 4-39.  
41  
Download from Www.Somanuals.com. All Manuals Search And Download.  
SECTION 4  
MAINTENANCE  
6. Makesurebronzewasherisinbetweenthetwohalves.  
9. Loosen the split locking collar.  
Figure 4-42.  
7. Place the idler shaft assembly back into place and  
reinstall the adjustment screws.  
Figure 4-45.  
10. Remove drive shafts by sliding to right then lifting the  
left side. Follow cleaning and lubricating procedures out-  
lined in Steps 4-6.  
Figure 4-43.  
Figure 4-46.  
8. Loosenthesetscrewoneachconveyordrivesprocket  
and remove sprockets.  
11. Reassemble conveyor drive shafts into frame, mak-  
ing sure nylon spacer is in place.  
Figure 4-44.  
Figure 4-47.  
42  
Download from Www.Somanuals.com. All Manuals Search And Download.  
SECTION 4  
MAINTENANCE  
12. Slide shaft assembly to right side, holding assembly  
in place. Slide split locking collar to the left side and  
tighten.  
13. Sliderearconveyordrivesprocketontoshaft.Tighten  
thesetscrewofthisdrivesprocketuntilitextendsintothe  
hole of the hollow shaft. It should NOT touch the inner,  
solid shaft. Check to see that only the rear shaft moves  
whenthesprocketisturned.Ifbothshaftsmove,youhave  
tightened the set screw too tight. Loosen the set screw  
until only the rear shaft moves when the sprocket is  
turning.  
Figure 4-48.  
14. Insert adaptor bushing into remaining drive sprocket  
thenplaceontoshaft. Makesurenylonspacerisinplace.  
Tightensetscrewmakingsurescrewgoesthroughslotin  
adaptor bushing and locks onto shaft.  
15. Thread conveyor belts back onto frame making sure  
the links will be traveling in the proper direction.  
16. Follow conveyor reassembly instructions in Monthly  
MaintenanceParagraphF.  
NOTE: Itisrecommendedthatthe6MonthMaintenance  
schedulebeperformedbyaMiddlebyMarshallauthorized  
service technician.  
IV. MAINTENANCE - EVERY 6 MONTHS  
Figure 4-49.  
A. CheckbrushesonD.C.conveyormotor,whenwornto  
less than 1/10(2.4mm), replace the brushes.  
B. Clean and inspect the burner nozzle and electrode  
assembly. Also check your oven venting system.  
C. Checkconveyorshaftbushingsandspacers.Replace  
themiftheyareworn.SeeFigure6-5,ConveyorExploded  
Drawing, items 15, 30 and 31 or Figure 6-6, Split Belt  
Conveyor, items 19, 23, 31, 35 and 36.  
IMPORTANT NOTICES:  
Installation of replacement parts requiring access  
to the interior of the oven is permitted only by an  
authorized service technician.  
Figure 4-50.  
If there are any problems with the operation of the  
oven, the authorized service technician must be  
called.  
It is suggested to obtain a service contract with a  
manufacturersauthorizedservicetechnician.  
Figure 4-51.  
43  
Download from Www.Somanuals.com. All Manuals Search And Download.  
SECTION 4  
MAINTENANCE  
parts that can reduce serious downtime and loss of  
production, if a failure occurs.  
KEY SPARE PARTS KIT  
An oven can be purchased with a Key Spare Parts Kit  
(Figure4-52).(Thekitcanbepurchasedwhentheovenis  
ordered, or later, from a Middleby Marshall Authorized  
Parts Distributor). The kit contains many of the crucial  
Replacementpartsforthiskitcanbepurchasedfromyour  
Middleby Marshall Authorized Parts Distributor.  
4
1
2
5
3
7
8
6
11  
9
10  
12, 13  
14, 15, 16, 17  
ITEM QTY.  
P/N  
DESCRIPTION  
DIGITALTEMPERATURECONTROLLER  
1
2
1
1
2
1
1
1
1
1
1
1
1
2
2
1
1
1
1
47321  
51067  
30153  
60542  
33984  
50517  
44687  
33983  
36451  
97525  
60836  
44914  
44568  
58238  
50232  
50587  
50589  
CONVEYORDRIVEMOTORW/PICKUPASSY.  
DRIVE MOTOR BRUSHES  
3
4
KIT, CONVEYOR SPEED CONTROLER  
KIT, THERMOCOUPLE 6  
5
6
BELT, BLOWER  
7
MOTOR, BLOWER, 208/230V, 1/2HP  
HIGH LIMIT CONTROL MODULE, 240V  
COOLINGFAN(BACKWALL)  
COOLINGFAN(CONTROLCOMPARTMENT)  
AIRSWITCH  
8
9
10  
11  
12  
13  
14  
15  
16  
17  
CONTROLLER, POWER 208V/240V  
CONTROLLER, POWER 380V/480V  
HEATER 208V 17kW  
HEATER 240V 17kW  
HEATER 380V 17kW  
HEATER 480V 17kW  
44  
Download from Www.Somanuals.com. All Manuals Search And Download.  
SECTION 5  
TROUBLESHOOTING  
SECTION 5  
TROUBLESHOOTING  
PROBLEM:  
PROBLEM:  
OVEN BLOWER AND CONVEYOR OPER-  
ATE, YET THE OVEN IS NOT HEATING  
PRODUCTS ARE OVERCOOKED  
OR UNDERCOOKED  
Reset the temperature controller  
to a new setting (above 200°F),  
after turning the BLOWER/HEAT  
switch to off for 30 seconds.  
Check for correct  
setting on tempera-  
ture controller.  
Check for correct  
setting of conveyor  
speed control.  
Turn temperature  
control to correct  
setting.  
Start the oven again. If the oven still does not  
heat, call your Middleby Marshall Service Agency.  
Set the conveyor speed  
control at correct setting.  
Verify the food  
preparation process.  
PROBLEM:  
CONVEYOR WILL NOT HOLD PROPER  
SPEED OR WILL NOT RUN AT ALL  
If products still cook incorrectly,  
call your Middleby Marshall  
Service Agency.  
Check whether the conveyor is  
jammed on something in oven.  
PROBLEM:  
OVEN DOES NOT HEAT  
Check for proper tension of conveyor drive  
chain and conveyor belt. Refer to Section 4 for  
correct procedure.  
Check to see if both BLOWER/  
HEAT switch are in the “ON” or  
“I” position.  
Check that the conveyor  
drive sprocket is tight.  
If oven does not heat, call your  
Middleby Marshall Service Agency.  
If conveyor still does not run correctly, contact  
your Middleby Marshall Service Agency.  
PROBLEM:  
BLOWER MOTOR IS RUNNING, YET LITTLE  
OR NO AIR BLOWS FROM AIR FINGERS  
PROBLEM:  
OVEN DOES NOT TURN ON WHEN ITS  
SWITCHES ARE TURNED ON  
Air fingers reassembled incorrectly,  
after cleaning.  
Check that all electric supply switches are set to  
the “ON” or “I” position. Then, start the oven.  
Assemble air fingers correctly, after cleaning.  
Refer to Section 4 procedure, or call your  
Middleby Marshall Service Agency.  
If oven still will not start, contact your Middleby  
Marshall Service Agency.  
45  
Download from Www.Somanuals.com. All Manuals Search And Download.  
SECTION 5  
TROUBLESHOOTING  
NOTES  
46  
Download from Www.Somanuals.com. All Manuals Search And Download.  
SECTION 6  
PARTS LIST  
SECTION 6 - PARTS LIST  
47  
Download from Www.Somanuals.com. All Manuals Search And Download.  
SECTION 6  
PARTS LIST  
48  
Download from Www.Somanuals.com. All Manuals Search And Download.  
SECTION 6  
PARTS LIST  
49  
Download from Www.Somanuals.com. All Manuals Search And Download.  
SECTION 6  
PARTS LIST  
50  
Download from Www.Somanuals.com. All Manuals Search And Download.  
SECTION 6  
PARTS LIST  
51  
Download from Www.Somanuals.com. All Manuals Search And Download.  
SECTION 6  
PARTS LIST  
52  
Download from Www.Somanuals.com. All Manuals Search And Download.  
SECTION 6  
PARTS LIST  
53  
Download from Www.Somanuals.com. All Manuals Search And Download.  
SECTION 6  
PARTS LIST  
54  
Download from Www.Somanuals.com. All Manuals Search And Download.  
SECTION 6  
PARTS LIST  
OTP.  
(POT.  
P.TON0&56")  
O
ALCNVEYORS)  
-
-
-
-
->  
<
<
<
<
<-  
-
-
-
-
>
-
-
-
>
-
-
-
-
-
-
-
->  
<
<
<
<
-
<
<
<
-
<
<
<
<
<
<
<
<-  
55  
Download from Www.Somanuals.com. All Manuals Search And Download.  
SECTION 6  
PARTS LIST  
56  
Download from Www.Somanuals.com. All Manuals Search And Download.  
SECTION 6  
PARTS LIST  
OTP.  
(POT.  
P.TON0&56")  
O
ALCNVEYORS)  
-
-
-
-
->  
<
<
<
<
<-  
-
-
-
-
>
-
-
-
>
-
-
-
-
-
-
-
->  
<
<
<
<
<
<
<
-
<
<
<
<
<
<
<-  
57  
Download from Www.Somanuals.com. All Manuals Search And Download.  
SECTION 6  
PARTS LIST  
58  
Download from Www.Somanuals.com. All Manuals Search And Download.  
SECTION 6  
PARTS LIST  
59  
Download from Www.Somanuals.com. All Manuals Search And Download.  
SECTION 6  
PARTS LIST  
NOTES  
60  
Download from Www.Somanuals.com. All Manuals Search And Download.  
SECTION 7  
ELECTRICAL SCHEMATICS  
SECTION 7  
ELECTRICAL SCHEMATICS  
1 0 A W G  
3 1 0  
3 0 4  
3 0 2  
4 0 6  
5 0 5  
3 0 6  
4 1 8  
4 1 6  
5 1 5  
5 1 7  
C B 8 - 6 3 A  
S S R 2  
3 0 1  
D I S Y U N T O R  
D I S J O N C T E U R  
T R E N N S C H A L T E R S  
C I R C U I T B R E A K E R  
C O N T R O L A D O R  
C O N T R O L E U R  
S C H A L T S C H U T Z  
C O N T A C T O R  
v
"
4 0 4  
5 0 3  
5 2 1  
6 0 6  
6 0 7  
3 0 9  
6 0 4  
3 0 1  
3 0 3  
3 0 5  
4 1 0  
5 0 9  
4 0 4  
5 0 3  
4 0 8  
5 0 7  
5 1 1  
C B 7 - 6 3 A  
S S R 1  
D I S Y U N T O R  
D I S J O N C T E U R  
T R E N N S C H A L T E R S  
C I R C U I T B R E A K E R  
C O N T R O L A D O R  
5 1 3  
C O N T R O L E U R  
S C H A L T S C H U T Z  
C O N T A C T O R  
v
"
2 2 2  
1 6  
1 5  
1 4  
1 3  
1 2  
1 1  
1 0  
9
G
L 1  
L 2  
4
C O M 1  
N O 1  
C O M 2  
N O 2  
5
6
- 7  
+ 8  
1 2 7  
1 2 5  
1 3 5  
T H E R M O S T A T O  
V E N T I L A T O R - S P O L P A D O  
I N T E R R U P T O R D E  
T E M P E R A T U R E  
C O N T R O L E U R D E  
C O M M U T A T E U R V E N T I L A T E U R  
G E B L A S E S C H A L T E R  
T E M P E R A T U R S C H A L T E R  
T E M P E R A T U R E C O N T R O L  
"
"
B L O W E R S W I T C H  
1 0 9  
C O M 1  
N O 1  
C O M 2  
N O 2  
C O M 1  
N O 1  
C O M 2  
N O 2  
LINEA  
LIGNE  
LINIE  
LINE  
LOAD  
LAST  
CHARGE  
CARGA  
210  
C O M  
1 3 5  
1 1 5  
1 1 9  
2 1 6  
1 3 7  
61  
Download from Www.Somanuals.com. All Manuals Search And Download.  
SECTION 7  
ELECTRICAL SCHEMATICS  
1 0 A W G  
3 1 0  
3 0 4  
3 0 2  
4 0 6  
5 0 5  
3 0 6  
4 1 8  
4 1 6  
5 1 5  
4 2 0  
5 1 9  
5 1 7  
C B 8 - 6 3 A  
S S R 2  
D I S Y U N T O R  
C O N T R O L A D O R  
D I S J O N C T E U R  
T R E N N S C H A L T E R S  
C I R C U I T B R E A K E R  
C O N T R O L E U R  
S C H A L T S C H U T Z  
C O N T A C T O R  
v
"
5 2 1  
6 0 6  
6 0 7  
3 0 9  
6 0 4  
3 0 3  
4 0 8  
3 0 5  
4 1 0  
5 0 9  
4 0 4  
5 0 3  
4 1 2  
5 1 1  
5 0 7  
C B 7 - 6 3 A  
S S R 1  
D I S Y U N T O R  
D I S J O N C T E U R  
T R E N N S C H A L T E R S  
C I R C U I T B R E A K E R  
C O N T R O L A D O R  
5 1 3  
C O N T R O L E U R  
S C H A L T S C H U T Z  
C O N T A C T O R  
v
"
2 2 2  
1 6  
1 5  
1 4  
1 3  
1 2  
1 1  
1 0  
9
G
L 1  
L 2  
4
C O M 1  
N O 1  
C O M 2  
5
N O 2  
6
- 7  
+ 8  
1 2 7  
1 2 5  
1 3 5  
T H E R M O S T A T O  
V E N T I L A T O R - S P O L P A D O  
I N T E R R U P T O R D E  
T E M P E R A T U R E  
C O N T R O L E U R D E  
C O M M U T A T E U R V E N T I L A T E U R  
G E B L A S E S C H A L T E R  
T E M P E R A T U R S C H A L T E R  
T E M P E R A T U R E C O N T R O L  
"
"
B L O W E R S W I T C H  
1 0 9  
C O M 1  
N O 1  
C O M 2  
N O 2  
C O M 1  
N O 1  
C O M 2  
LINEA  
LIGNE  
LINIE  
LINE  
N O 2  
LOAD  
LAST  
CHARGE  
CARGA  
210  
C O M  
1 3 5  
1 1 5  
1 1 9  
2 1 6  
1 3 7  
62  
Download from Www.Somanuals.com. All Manuals Search And Download.  
SECTION 7  
ELECTRICAL SCHEMATICS  
1 0 A W G  
3 1 0  
3 0 4  
3 0 2  
4 0 6  
5 0 5  
3 0 6  
4 1 8  
4 1 6  
5 1 5  
5 1 7  
C B 8 - 6 3 A  
S S R 2  
3 0 1  
D I S Y U N T O R  
D I S J O N C T E U R  
T R E N N S C H A L T E R S  
C I R C U I T B R E A K E R  
C O N T R O L A D O R  
C O N T R O L E U R  
S C H A L T S C H U T Z  
C O N T A C T O R  
v
"
4 0 4  
5 0 3  
5 2 1  
6 0 6  
6 0 7  
3 0 9  
6 0 4  
3 0 1  
3 0 3  
4 0 8  
3 0 5  
4 1 0  
5 0 9  
4 0 4  
5 0 3  
5 1 1  
5 0 7  
C B 7 - 6 3 A  
S S R 1  
D I S Y U N T O R  
D I S J O N C T E U R  
T R E N N S C H A L T E R S  
C I R C U I T B R E A K E R  
C O N T R O L A D O R  
5 1 3  
C O N T R O L E U R  
S C H A L T S C H U T Z  
C O N T A C T O R  
v
"
2 2 2  
1 6  
1 5  
1 4  
1 3  
1 2  
1 1  
1 0  
9
G
L 1  
L 2  
4
C O M 1  
N O 1  
C O M 2  
5
N O 2  
6
- 7  
+ 8  
1 2 7  
1 2 5  
1 3 5  
T H E R M O S T A T O  
V E N T I L A T O R - S P O L P A D O  
I N T E R R U P T O R D E  
T E M P E R A T U R E  
C O N T R O L E U R D E  
C O M M U T A T E U R V E N T I L A T E U R  
G E B L A S E S C H A L T E R  
T E M P E R A T U R S C H A L T E R  
T E M P E R A T U R E C O N T R O L  
"
"
B L O W E R S W I T C H  
1 0 9  
C O M 1  
N O 1  
C O M 2  
N O 2  
C O M 1  
N O 1  
C O M 2  
LINEA  
LIGNE  
LINIE  
LINE  
N O 2  
LOAD  
LAST  
CHARGE  
CARGA  
210  
C O M  
1 3 5  
1 1 5  
1 1 9  
2 1 6  
1 3 7  
63  
Download from Www.Somanuals.com. All Manuals Search And Download.  
WARNING  
Improper installation, adjustment, alteration, service or maintenance  
can cause property damage, injury or death. Read the installation,  
operating and maintenance instructions thoroughly before  
installing or servicing this equipment.  
NOTICE  
During the warranty period, ALL parts replacement and servicing should be performed by  
your Middleby Marshall Authorized Service Agent. Service that is performed by parties  
otherthanyourMiddlebyMarshallAuthorizedServiceAgentmayvoidyourwarranty.  
NOTICE  
UsinganypartsotherthangenuineMiddlebyMarshallfactorymanufacturedpartsrelieves  
themanufacturerofallwarrantyandliability.  
NOTICE  
Middleby Marshall reserves the right to change specifications at any time.  
Middleby is proud to support the Commercial Food Equipment  
Service Association (CFESA). We recognize and applaud  
CFESA's ongoing efforts to improve the quality of technical  
serviceintheindustry.  
MiddlebyCookingSystemsGroup1400ToastmasterDriveElgin,IL60120USA(847)741-3300FAX(847)741-4406  
24-Hour Service Hotline: 1-(800)-238-8444  
Download from Www.Somanuals.com. All Manuals Search And Download.  

KTM Motorcycle 640 LC4 User Manual
Lanzar Car Audio Car Stereo System VC5K User Manual
Lennox Hearth Outdoor Fireplace MP 36OD User Manual
LG Electronics Refrigerator LMXC23746D User Manual
Lochinvar Boiler 000 User Manual
Locke Lawn Mower MP 3132 FP 3132 User Manual
Magnavox Flat Panel Television 26MF330B User Manual
Marmitek Satellite Radio 121101 User Manual
Maytag Washer ED5FVGXWS User Manual
MB QUART Car Speaker FKB113 User Manual