Middleby Marshall PS360 User Manual

Gas PS360/PS360WB Tandem (AGA), English  
AMIDDLEBYCOMPANY  
owner's operating  
& installation manual  
SERIES PS360/PS360WB  
TANDEM GAS OVEN MODELS  
PS360/PS360WBTandemOven  
PS360/PS360WB Tri Tandem Oven  
PS360/PS360WBDoubleTandemOven  
PS360/PS360WB Quad Tandem Oven  
P/N39223  
Rev. B • V2 • 3/99  
Price $30.00  
© 1999 Middleby Marshall Inc.  
MIDDLEBY MARSHALL INC.  
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 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 to  
be 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.  
MIDDLEBY MARSHALL, HEREINAFTER REFERRED TO  
AS THE SELLER, WARRANTS EQUIPMENT MANUFAC-  
TUREDBYITTOBEFREEFROMDEFECTSINMATERIAL  
AND WORKMANSHIP FOR WHICH IT IS RESPONSIBLE.  
THE SELLER’S OBLIGATION UNDER THIS WARRANTY  
SHALL BE LIMITED TO REPLACING OR REPAIRING AT  
SELLER’SOPTION,WITHOUTCHARGE,ANYPARTFOUND  
TO BE DEFECTIVE AND ANY LABOR AND MATERIAL EX-  
PENSE INCURRED BY SELLER IN REPAIRING OR RE-  
PLACING SUCH PART, SUCH WARRANTY SHALL BE  
LIMITED TO THE ORIGINAL PURCHASER ONLY AND  
SHALL BE EFFECTIVE FOR A PERIOD OF ONE YEAR  
FROMDATEOFORIGINALINSTALLATION,OR18MONTHS  
FROM DATE OF SHIPMENT, WHICHEVER IS EARLIER;  
PROVIDEDTHATTERMSOFPAYMENTHAVEBEENFULLY  
MET.  
This warranty is not valid unless equipment is installed,  
started, and demonstrated under the supervision of a  
factory certified installer.  
Normal maintenance functions, including lubrication, ad-  
justment of airflow, thermostats, door mechanisms,  
microswitches, burners and pilot burners and replacement  
of light bulbs, fuses and indicating 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  
certified installer.  
Normal maintenance functions, including lubrication, clean-  
ing or customer abuse are not covered by this no quibble  
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 person-  
nel.  
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 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.  
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 equip-  
ment, 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.  
Theforegoingwarrantyisexclusiveandinlieuofallother  
warranties, expressed or implied. There are no implied  
warrantiesofmerchantabilityoroffitnessforaparticular  
purpose.  
The foregoing warranty 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.  
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 guar-  
antee the process of manufacture by Buyer or the quality of  
product to be produced by the equipment supplied hereun-  
der and Seller shall not be liable for any prospective or lost  
profits of Buyer.  
THEFOREGOINGWARRANTYISEXCLUSIVEANDINLIEU  
OF ALL OTHER EXPRESS AND IMPLIED WARRANTIES  
WHATSOEVER.SPECIFICALLYTHEREARENOIMPLIED  
WARRANTIES OF MERCHANTABILITY OR OF FITNESS  
FOR A PARTICULAR PURPOSE.  
The foregoing shall be Seller’s sole and exclusive obliga-  
tion 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.  
ii  
TABLEOFCONTENTS  
page  
page  
SECTION3-OPERATION .................................................... 3-1  
SECTION1-DESCRIPTION ................................................. 1-1  
I.  
OVENSPECIFICATIONS .................................... 1-1  
A. PhysicalSpecifications ................................. 1-1  
B. GeneralSpecifications .................................. 1-1  
C. ElectricalSpecifications ................................ 1-1  
D. GasOrificeandPressureSpecifications ........ 1-1  
I.  
LOCATIONANDDESCRIPTIONOFCONTROLS 3-1  
A. BLOWERSwitch .......................................... 3-1  
B. HEATSwitch ................................................ 3-1  
C. CONVEYORSwitch...................................... 3-1  
D. DigitalTemperatureController ....................... 3-1  
E. ConveyorSpeedDisplay ............................... 3-1  
F. ConveyorSpeedAdjustmentKnob ................. 3-1  
G. ConveyorSpeedController ............................ 3-1  
H. MachineryCpt.AccessPanelSafetySwitch .. 3-1  
II. OVENUSES ....................................................... 1-2  
III. OVENCOMPONENTS ........................................ 1-2  
A. ConveyorDriveMotor .................................... 1-2  
B. AirFingers .................................................... 1-2  
C. Conveyor ...................................................... 1-2  
D. Window ........................................................ 1-2  
E. OvenDataPlate ............................................ 1-2  
F. CrumbPans .................................................. 1-2  
G. ControlPanel ................................................ 1-2  
H. MachineryCompartmentAccessPanel .......... 1-2  
II. NORMALOPERATION,STEP-BY-STEP ............ 3-2  
A. DailyStartupProcedures ............................... 3-2  
B. DailyShutdownProcedures ........................... 3-2  
III. QUICKREFERENCE:BAKETIME ...................... 3-3  
IV. QUICKREFERENCE:DIGITALTEMPCONTROL 3-3  
V. QUICKREFERENCE:TROUBLESHOOTING ...... 3-4  
I.  
EndPanels ................................................... 1-2  
J. ConveyorEndStop ....................................... 1-2  
K. ConveyorExtensionCovers .......................... 1-2  
L. GasBurner ................................................... 1-2  
M. Blowers ........................................................ 1-2  
N. CoolingFans ................................................. 1-2  
SECTION4-MAINTENANCE ............................................... 4-1  
I.  
MAINTENANCE-DAILY ...................................... 4-2  
II. MAINTENANCE-MONTHLY ............................... 4-3  
III. MAINTENANCE-EVERY3MONTHS ................. 4-4  
IV. MAINTENANCE-EVERY6MONTHS ................. 4-4  
SECTION2-INSTALLATION ............................................... 2-1  
SECTION5-ELECTRICALSCHEMATICS ............................ 4-1  
I.  
INSTALLATIONKIT ............................................. 2-2  
I.  
WIRINGDIAGRAM,PS360/PS360WB  
II. TRANSITIONCHAMBERCOMPONENTS ........... 2-2  
III. VENTILATIONSYSTEM ...................................... 2-3  
A. Requirements ................................................ 2-3  
B. Recommendations ......................................... 2-3  
C. OtherVentilationConcerns ............................ 2-3  
IV. THERMOCOUPLEINSTALLATION ...................... 2-4  
V. ASSEMBLY ......................................................... 2-5  
A. OvenStand ................................................... 2-5  
B. JoiningtheOvenBodies ................................ 2-5  
C. InstallingtheCenterTransition ....................... 2-7  
D. InstallingtheConveyorFrameandBelt ........... 2-9  
VI. ELECTRICALSUPPLY ....................................... 2-12  
VII. GASSUPPLY ....................................................2-13  
A. Connection ................................................... 2-13  
B. GasConversion ........................................... 2-14  
Tandem&DoubleTandemOvens ......................... 4-1  
II. WIRINGDIAGRAM,PS360/PS360WB  
TriTandem&QuadTandemOvens ....................... 4-2  
iii  
SECTION1  
DESCRIPTION  
SECTION 1  
DESCRIPTION  
I. OVEN SPECIFICATIONS  
A. PHYSICAL SPECIFICATIONS  
Tandem  
DoubleTandem  
TriTandem  
QuadTandem  
PS360  
PS360WB  
PS360  
PS360WB  
PS360  
PS360WB  
PS360  
PS360WB  
Dimensions:  
Overall Height (inc. top)  
45-1/2”  
1156mm 1156mm  
45-1/2”  
81-1/2”  
2070mm 2070mm  
81-1/2”  
64-1/2”  
1638mm 1638mm  
64-1/2”  
64-1/2”  
1638mm 1638mm  
64-1/2”  
Overall Depth (inc. motor  
shroud and window)  
52” 60”  
52” 60”  
52” 60”  
52” 60”  
1321mm 1524mm  
49” 57”  
1321mm 1524mm  
49” 57”  
1321mm 1524mm  
49” 57”  
1321mm 1524mm  
49” 57”  
Overall Depth (inc. motor  
shroud - no window)  
1245mm 1448mm  
1245mm 1448mm  
1245mm 1448mm  
1245mm 1448mm  
Overall Length  
144-1/2” 144-1/2”  
3670mm 3670mm  
144-1/2” 144-1/2”  
3670mm 3670mm  
199” 199”  
5055mm 5055mm  
273-1/2” 273-1/2”  
6947mm 6947mm  
Conveyor Width  
32”  
813mm  
40”  
1016mm  
32”  
813mm  
40”  
1016mm  
32”  
813mm  
40”  
1016mm  
32”  
40”  
813mm 1016mm  
Recommended Minimum  
Clearances:  
Rear of Oven (inc. motor  
shroud) to Wall  
1”  
25mm  
1”  
25mm  
1”  
25mm  
1’  
25mm  
1”  
25mm  
1”  
25mm  
1”  
25mm  
1’  
25mm  
Conveyor Extension to Wall  
(both ends)  
0”  
0mm  
0”  
0mm  
0”  
0mm  
0”  
0mm  
0”  
0mm  
0”  
0mm  
0”  
0mm  
0”  
0mm  
B. GENERAL SPECIFICATIONS (per oven section)  
PS360  
PS360WB  
Weight  
1350 lbs. (612kg)  
1675 lbs. (760 kg)  
Approx. 104.5 ft3 (3.0 m3)  
135,000 BTU (34,020 kcal, 40 kW/hr)  
550°F (288°C)  
1400 lbs. (634kg)  
1750 lbs. (780kg)  
Approx. 122 ft.3 (3.5m3)  
Shipping Weight  
Shipping Cube  
Rated Heat Input  
Maximum Operating Temperature  
Air Blowers  
170,000 BTU (42,840 kcal, 50 kW/hr)  
Two blowers at 1550 ft.3/min. (43.9m3/min.) at 1700 rpm  
0.88” (2.2cm) Water Static Pressure  
2600 ft./min. (1320cm/sec.)  
15 min.  
Average Air Jet Velocity  
WarmupTime  
Flue Vent  
1.08" (27mm) D x 3" (76mm) W  
80 ft.3/min. (2.1 m3/min.)  
Exhaust Flow  
C. ELECTRICAL SPECIFICATIONS (per oven section)  
Main Blower Voltage  
208-240V  
Control Circuit Voltage  
Phase  
1 Ph  
Freq  
50/60Hz  
50Hz  
Current Draw  
Poles  
3Pole  
2Pole  
Wires  
120V  
8A  
8A  
4 Wire (2 hot, 1 neut, 1 gd)  
3 Wire (2 hot, 1 gd)  
190/200/208/220/380V(export)  
110V (transformer)  
1 Ph  
D. GAS ORIFICE AND PRESSURE SPECIFICATIONS (per oven section)  
Gas Type  
Main Orifice I.D.  
(PS360)  
Main Orifice I.D.  
(PS360WB)  
Pilot Orifice  
I.D.  
Bypass Orifice  
I.D.  
Supply (Inlet)  
Pressure  
Orifice (Manifold)  
Pressure  
Natural  
0.219”  
(5.56mm)  
0.250”  
(6.35mm)  
0.028”  
(0.71mm)  
0.065”/#53 drill  
(1.65mm)  
6-12” W.C.  
(14.9-29.9mbar)  
3.5” W.C.  
(8.7mbar)  
Propane  
0.134”  
(3.40mm)  
0.152”  
(3.86mm)  
0.018”  
(0.46mm)  
0.034”/#62 drill  
(0.86mm)  
11-14” W.C.  
(27.4-34.9mbar)  
10” W.C.  
(24.9mbar)  
1-1  
SECTION1  
DESCRIPTION  
II. OVEN USES  
PS360/PS360WB Tandem Ovens can be used to  
bakeand/orcookawidevarietyoffoodproducts,such  
as pizza, pizza-type products, cookies, sandwiches  
andothers.  
III. OVEN COMPONENTS  
B. Air Fingers  
D. Front  
Loading  
Window  
A. Conveyor  
(inside baking  
E. Oven Data  
Plate  
Drive Motor  
chamber)  
C. Conveyor  
(inside shroud)  
F. Crumb Pan  
L. Crumb Pan  
K. Conveyor  
Extension  
Covers  
G. Control  
Panel  
H. Machinery  
Compartment  
Access Panel  
J. Conveyor  
End Stop  
I. End Panels  
Figure 1-1 - Oven Components  
A. Conveyor Drive Motor: Moves the conveyor.  
I. End Panels: Allow access to the oven's interior  
components. No user-servicable parts are located  
inside the end panels.  
B. Air Fingers: Project streams of hot air onto the food  
product.  
J. Conveyor End Stop (not present on ovens with  
heavy-dutyconveyor): Preventsfoodproductsfrom  
fallingofftheendofthemovingconveyor.  
C. Conveyor: Movesthefoodproductthroughtheoven.  
D. Window (on ovens so equipped): Allows the user  
to see and access food products inside the baking  
chamber.  
K. Conveyor Extension Covers (not present on ov-  
ens with heavy-duty conveyor): Cover theendsof  
theconveyorframe. Onecoverislocatedateachend  
oftheconveyor.  
E. Oven Data Plate: Provides specifications for the  
oven that affect installation and operation. Refer to  
Section 2, Installation, for details.  
NotShown:  
F. Crumb Pans: Catch crumbs and other material that  
drop through the conveyor belt. One crumb pan is  
located at each end of the conveyor.  
L. GasBurner: Heatsair,whichisthenprojectedtothe  
airfingersbytheblowers. Theburneristurnedonand  
offaccordingtothesettingsontheDigitalTemperature  
Controller (located on the Control Panel).  
G. ControlPanel: Locationoftheoperatingcontrolsfor  
the oven. Refer to Section 3, Operation, for details.  
M. Blowers: Fans that project hot air from the burner to  
H. Machinery Compartment Access Panel: Allows  
access to the oven's interior components. No user-  
servicablepartsarelocatedinthemachinerycompart-  
ment.  
the air fingers.  
N. CoolingFans: Cooltheinterioroftheoven toprotect  
thecomponents.  
1-2  
SECTION 2  
INSTALLATION  
SECTION 2  
INSTALLATION  
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.  
CAUTION  
For additional installation information, refer to the PS360 Pre-Installation Procedures Manual (Middleby  
Marshall P/N 88210-0024) or 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 operation.  
NOTE  
Wiring diagrams are contained in this manual (Section 5, “Electrical Schematics”) and are also  
located inside the Machinery Compartment Access Panel.  
NOTE  
All aspects of the oven installation, including placement, utility connections, and ventilation requirements, must  
conform with any applicable local and national codes. These codes supercede the requirements and guidelines  
provided in this manual.  
NOTE  
In U.S.A., the oven installation must conform with local codes, or in the absence of local codes, with the National  
Fuel Gas Code, ANSI Z223.1. 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  
In Canada, the oven installation must conform with local codes, or in the absence of local codes, with the Natural  
Gas Installation Code, CAN/CGA-B149.1, or the Propane Gas Installation Code, CAN/CGA-B149.2, as applicable.  
The oven, when installed, must be electrically grounded in accordance with local codes, or in the absence of local  
codes, with the Canadian Electrical Code CSA, C22.2, as applicable.  
NOTE  
For Australian installation, the oven installation must conform with AGA Code, AG601, and with any requirements of  
theappropriatestatutoryauthority.  
2-1  
SECTION 2  
INSTALLATION  
I. INSTALLATION KIT  
Fig. 2-1 - Installation Kit  
Item  
Part #  
22361-0001  
22450-0028  
30773  
Description  
Tandem  
Double Tandem Tri Tandem Quad Tandem  
1
2
3
4
5
6
7
Flexible Gas Hose  
Adjustable Legs  
Flue Vent, 14"Lg.  
Flue Vent, 29-1/2"Lg.  
Flue Vent, 50" Lg.  
Screw, 10-32 x 3/8  
2
8
4
8
3
12  
-
4
16  
-
2
-
30759  
-
2
3
4
30758  
-
2
-
-
21256-0008  
A/R  
1
A/R  
2
A/R  
-
A/R  
-
35000-1103  
35000-1899  
Conveyor End Stop - PS360  
Conveyor End Stop - PS360WB  
8
9
21292-0001  
33984  
Scr, #2PT 10-16 x 3/4 Hx Wsh  
Thermocouple  
A/R  
2
A/R  
4
A/R  
3
A/R  
4
10 27276-0001  
CableClamp  
2
4
3
4
11  
12  
1002040  
39223  
Warranty, Parts & Serv. Dist.List  
1
1
1
1
Owners Operating and Installation Manual (English)  
11 Piece Hex Key Set  
1
1
2
1
1
1
13 27126-0238  
1
1
1
14  
31389  
Silicone Tubing, 36” (914mm) L x  
5/16” (8mm) ID x 7/16” (11mm) OD  
4
3
4
-
-
-
-
35000-1454  
35000-1456  
35000-1457  
Machinery Compartment Trim Strip  
Front Gasket Spacer  
1
2
2
1
2
4
4
2
2
4
4
2
2
4
4
2
Rear Gasket Spacer  
37200-0013  
32483  
Baking Chamber Gasket and Frame - PS360  
Baking Chamber Gasket and Frame - PS360WB  
II. TRANSITION CHAMBER COMPONENTS (Quad Tandem Ovens Only)  
Qty.  
Part #  
Description  
SideWall  
Qty.  
Part #  
Description  
1
1
2
2
48009-0025  
35000-1748  
35000-1749  
1
37000-0696  
32457  
Floor Panel - PS360  
Floor Panel - PS360WB  
Rear Support  
Front Support  
1
48009-0024  
32456  
Top Panel - PS360  
Top Panel - PS360WB  
37000-0697  
32455  
Top Support Channel - PS360  
Top Support Channel - PS360WB  
2-2  
SECTION 2  
INSTALLATION  
III. VENTILATION SYSTEM  
The rate of air flow exhausted through the ventilation  
systemmayvarydependingontheovenconfigurationand  
hooddesign.Consultthehoodmanufacturerorventilation  
engineerforthesespecifications.  
IMPORTANT  
Where national or local codes require  
the installation of fire suppression  
equipment or other supplementary  
equipment, DO NOT mount the equip-  
ment directly to the oven.  
Toavoidanegativepressureconditioninthekitchenarea,  
returnairmustbebroughtbacktoreplenishtheairthatwas  
exhausted. Anegativepressureinthekitchencancause  
heat-relatedproblemstotheovencomponentsasifthere  
were no ventilation at all. The best method of supplying  
return air is through the heating, ventilation and air  
conditioning(HVAC)system. ThroughtheHVACsystem,  
the air can be temperature-controlled for summer and  
winter. Return air can also be brought in directly from  
outsidethebuilding,butdetrimentaleffectscanresultfrom  
extreme seasonal hot and cold temperatures from the  
outdoors.  
MOUNTING SUCH EQUIPMENT ON  
THE OVEN MAY:  
• VOID AGENCY CERTIFICATIONS  
• RESTRICT SERVICE ACCESS  
• LEAD TO INCREASED SERVICE  
EXPENSES FOR THE OWNER  
NOTE: Return air from the mechanically driven system  
mustnotblowattheopeningofthebakingchamber. Poor  
oven baking performance will result.  
A. REQUIREMENTS  
Amechanicallydrivenventilationsystemisrequiredforthe  
oven.  
PROPER VENTILATION OF THE OVEN IS THE  
RESPONSIBILITY OF THE OWNER.  
C. OTHERVENTILATIONCONCERNS  
Special locations, conditions, or problems may re-  
quiretheservicesofaventilationengineerorspecial-  
ist.  
B. RECOMMENDATIONS  
NOTETHATTHEHOODDIMENSIONSSHOWNINFIG-  
URE 2-2 ARE RECOMMENDATIONS ONLY. LOCAL  
AND NATIONAL CODES WILL VARY, AND MUST BE  
FOLLOWED WHEN INSTALLING THE VENTILATION  
SYSTEM. ANY APPLICABLE LOCAL AND NATIONAL  
CODES SUPERSEDE THE RECOMMENDATIONS  
SHOWNINTHISMANUAL.  
Inadequateventilationcaninhibitovenperformance.  
It is recommended that the ventilation system and  
ductworkbecheckedatprevailingintervalsasspeci-  
fiedbythehoodmanufacturerand/orHVACengineer  
or specialist.  
Fig. 2-2 - Ventilation System  
2-3  
Thread lead into  
machinery  
compartment here  
Use for  
conveyor  
IV. THERMOCOUPLE INSTALLATION  
1. Installthethermocouplesensingbulbintothecorrect  
hole in the rear of the oven, as shown in Figure 2-3.  
Thread lead into  
machinery  
compartment here  
Use for  
conveyor  
Figure 2-3  
Thermocouple Installation Locations  
2. Thread the thermocouple lead through the grommet  
and into the machinery compartment.  
3. Removetheright-sideaccesspanelofthemachinery  
compartment.  
4. Threadthethermocoupleleadthroughthesideofthe  
machinerycompartmentasshowninFigure2-4, and  
intotheelectricalbox(attheright-frontofthemachin-  
erycompartment).  
Figure 2-4  
Placing the Thermocouple Leads  
Figure 2-5  
Thermocouple Lead  
Connections  
5. Connect the thermocouple leads to the temperature  
controller as shown in Figure 2-5.  
6. RepeatSteps1-5foreachoftheotherovensectionsin  
the installation.  
8=White=Positive  
7=Red=Negative  
R=NoConnection  
Ground=Shieldedcable  
Attachment  
plates inc. w/  
upper oven  
V. ASSEMBLY  
A. OVENSTAND  
Iftheinstallationincludesupperovens  
mounted atop lower ovens, the ovens  
must be stacked before joining the  
tandemovenstogether.  
If the installation includes ovens that  
aretobemountedonstands,assemble  
the ovens to the stands before joining  
theovenstogether. Anexplodedview  
of the stand is shown in Figure 2-6.  
Figure 2-6  
Exploded View -  
Oven Stand  
B. JOININGTHEOVENBODIES  
ForTANDEMandDOUBLETANDEMinstallations,perform  
Steps 1-8 in this section to join the ovens.  
1. Determinetheproperpositionoftheovensbyreferring  
toFigure2-7. Then,movetheovenstotheirapproximate  
final locations.  
For TRI TANDEM installations, perform Steps 1-8 to join  
two of the ovens together, and ensure that they are level;  
then, repeatSteps1-8tojointhethirdoventothetwothat  
havealreadybeenassembled.  
2. Check that the top and bottom air finger retaining  
screws are present on all mating ends of the oven  
sections. SeeFigure2-7. Thescrewspreventtheair  
fingers from sliding in between the oven sections.  
For QUAD TANDEM installations, perform Steps 1-8 for  
EACH PAIR of ovens, producing two sets of two joined  
ovens. Do not assemble the center bridge section at this  
time.  
Figure 2-7  
Oven Positioning and Alignment  
LEFTOVEN  
RIGHTOVEN  
Air finger  
retaining  
screws  
Alignment  
plate  
Slot for  
alignment  
plate  
Sealing gasket  
assembly (pre-  
mounted)  
NOTE: The Sealing Gasket Assembly may be  
pre-mounted to EITHER of the two ovens.  
SECTION 2  
INSTALLATION  
Mating surface of  
ovens (shown from  
lower rear)  
3. Removetherearaxialcoolingfansthatareadjacentto  
thematingsidesoftheovens. Thefansmayeitherbe  
completely disconnected, or left attached by their  
wiring as shown in Figure 2-8.  
Wiring is still  
connected  
Figure 2-8 - Cooling Fan Removal  
4. Insert three of the supplied 1/2 x 5” bolts through the  
holesintheframeoftherightoven,pointingoutwardas  
showninFigure2-9. Then,slidethespacersintoplace  
on the bolts.  
2-1/2” x 2-1/2”  
(64 x 64mm)  
spacers  
Bolts  
2-1/2” x 8”  
(64 x 203mm)  
spacers  
Figure 2-9 - Bolts and Spacers  
5. Push the ovens together. Check that the mounting  
bolts, alignment plate, and sealing gasket are all  
properly aligned. See Figure 2-10.  
6. Tighten all of the attaching bolts. Check that the  
mating edges of the ovens align properly. If gaps  
appear between the tops of the ovens, it will be  
necessarytoloosentheconnectingboltsandrealign  
theovens.  
Figure 2-10 - Aligning the Sections  
2-6  
SECTION 2  
INSTALLATION  
7. Attach the front trim strip between the two ovens, as  
shown in Figure 2-11.  
Figure 2-11 - Trim Strip Installation  
8. Replace the rear axial cooling fans. See Figure 2-8.  
9. Performoneofthefollowing, asappropriate:  
Trim strip  
• For PS360/360WB Tandem and Double Tandem  
installations, skip ahead to Part D, INSTALLING  
THE CONVEYOR FRAME AND BELT (Page 2-9).  
• ForPS360/360WBTriTandeminstallations,perform  
Steps 1-8 again to attach the third oven to the two  
thathavejustbeenassembled. Then,skipaheadto  
Part D, INSTALLING THE CONVEYOR FRAME  
ANDBELT(Page2-9).  
• For PS360/360WB Quad Tandem installations,  
performSteps1-8againtoattachthetworemaining  
ovens to each other. Then, continue on to Part C,  
INSTALLINGTHECENTERTRANSITION.  
Figure 2-12  
Support Channel Installation - Lower Oven  
C. INSTALLINGTHECENTERTRANSITION  
1. Install the upper support channels to the two center  
ovens as shown in Figures 2-12 and 2-13.  
Support  
channels  
Figure 2-13  
Support Channel Installation - Upper Oven  
Support  
channels  
2-7  
SECTION 2  
INSTALLATION  
2. Align the two center ovens so that they are level and  
20” (508mm) apart. Then, attach the two angled  
support brackets between the two center ovens, as  
shown in Figures 2-14 and 2-15.  
Figure 2-14  
SupportBrackets,  
Lower Oven  
Note that a LOWER OVEN uses different support  
brackets for the front and rear, while an UPPER OVEN  
uses identical brackets on the front and rear.  
20”  
508mm  
Upper surfaces of  
brackets must be level  
with each other  
Figure 2-15  
SupportBrackets,  
Upper Oven  
20”  
508mm  
4. Place the transition floor panel into place atop the  
support brackets. See Figure 2-16.  
Figure 2-16  
Floor Panel  
Installation  
5. Install the transition (center) conveyor section, as  
shown in Figure 2-17. Align the conveyor section so  
that it extends the same distance into the two oven  
chambers.  
Figure 2-17  
Installing  
the Frame  
2-8  
SECTION 2  
INSTALLATION  
D. INSTALLINGTHECONVEYORFRAMEANDBELT  
FOR ALL TYPES OF OVENS, ENSURE THAT THE  
DRIVESECTION/ENDOFTHECONVEYORFRAMEIS  
PLACED ON THE SAME END OF THE OVEN AS THE  
CONVEYORDRIVEMOTOR.  
1. Insert the conveyor frame into the oven as follows:  
Hinged  
end section  
For a TANDEM or DOUBLE TANDEM oven,  
slide one hinged conveyor frame section  
into each end of the oven. The two  
sections butt against each other at the  
gapbetweenthetwoovensections. See  
Figure2-18.  
Figure 2-18  
Tandem and Double Tandem  
Conveyor Installation  
Hinged  
end section  
For TRI TANDEM ovens, slide one intermediate  
framesectionintotheoven(fromeitherend).  
Center this section inside the oven.  
Then, slide one intermediate  
section and one end section of  
the frame into EACH END of the  
oven. All five sections should  
butt against each other. See  
Figure2-19.  
End  
section  
Intermediate  
sections  
Figure 2-19  
Tri Tandem Conveyor  
Installation  
End  
section  
For QUAD TANDEM ovens, slide two intermediate  
sectionsandoneendsectionoftheframeintoEACH  
ENDoftheoven. Buttthetwoinnerintermediate  
sectionsagainstthetransition(center)frame  
section. The other frame sections  
shouldbuttagainsteachother.  
SeeFigure2-20.  
End  
section  
Intermediate  
sections  
Center section  
(transition)  
Intermediate  
sections  
Figure 2-20  
Quad Tandem Conveyor Installation  
End  
section  
2-9  
SECTION 2  
INSTALLATION  
Direction  
of travel  
2. Slide the conveyor belt through the support rods  
underneaththeframe,andthreaditthroughtheoven.  
Then,reachthroughtheovenwindowandpullthefree  
end of the belt through the oven so that it lies atop the  
conveyorframe.  
Afterthebelthasbeenpulledthroughtheoven,check  
thefollowing:  
Theconveyorbeltlinksmustbeorientedasshown  
in Figure 2-21.  
The smooth side of the conveyor belt must face  
UP.  
Figure 2-21 - Conveyor Link Orientation  
3. Connect the inside master links. Check that the links  
are oriented as shown in Figure 2-22.  
Incorrect  
position  
Correct  
position  
Figure 2-22 - Inside Master Links  
Direction  
of travel  
4. Connect the outside master links. Note that the  
outside master links have right and left sides. The  
right-sidemasterlinkhasanopenhookfacingyou,as  
shown in Figure 2-23.  
Figure 2-23  
OutsideMaster  
Links  
2-10  
SECTION 2  
INSTALLATION  
Latches  
5. ForaTANDEM,DOUBLETANDEM,orTRITANDEM  
oven installation, skip ahead to Step 9. For a QUAD  
TANDEM oven installation, continue on to Step 6.  
6. Slide the top transition panel into place. Then, slide  
the two transition side panels into place. See Figure  
2-24.  
7. If thefour latchesarenot alreadyattachedtotheside  
and top transition panels, attach them in place as  
shown in Figure 2-24.  
Latches  
8. Fasten the latches on the side and top panels to hold  
the panels in place.  
Figure 2-24 - Transition Section Final Assembly  
9. LOOSELYattachtheconveyordrivemotortotheend  
wall of the oven, as shown in Figure 2-25.  
10. Assemble the conveyor drive chain in place on the  
motorandconveyordrivesprockets.  
11. Position the motor to adjust the tension of the drive  
chain. The deflection of the chain should be 3/4”  
(19mm). DONOTOVERTIGHTENTHEDRIVECHAIN.  
Then, tighten the motor in place.  
12. Assemble the end plugs and motor housing onto the  
oven.  
13. TANDEMANDDOUBLETANDEMOVENSONLY:  
Assemble the end stops, conveyor crumb trays, and  
conveyor extension covers onto the oven. These  
components are illustrated in Figure 1-1 (Page 1-2).  
Figure 2-25  
Conveyor Motor and Drive Chain Assembly  
2-11  
SECTION 2  
INSTALLATION  
VI. ELECTRICAL SUPPLY  
CAUTION  
WARNING  
Authorized supplier personnel normally accomplish the  
connections for the ventilation system, electric supply,  
and gas supply, as arranged by the customer. Following  
these connections, the factory-authorized installer can  
perform the initial startup of the oven.  
Before connecting incoming power to the oven, measure  
the voltage of each input leg to neutral. The expected  
voltage is approximately 120V. ANY voltage reading  
exceeding130Vindicatesthatthesupplyhasahighleg.  
CONNECTINGAHIGHLEGTOTHEOVENVOIDSALL  
OVEN WARRANTIES. Connecting a “high” leg to the  
black lead of the oven can severely damage the oven’s  
electrical and electronic components.  
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.  
CAUTION  
NOTE: The electric supply connection must meet all  
national and local electrical code requirements.  
DO NOT CONNECT BLACK WIRE TO  
HIGH LEG. VOLTAGE OF THE BLACK  
AND WHITE WIRES MUST BE NO  
HIGHER THAN 130 VAC  
Check the oven data plate before making any electric  
supply connections. Electric supply connections must  
agree with data on the oven data plate. See Figure 2-26.  
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/circuit breaker have lockout/tagout capability.  
FOR DOMESTIC OVENS (WITHOUT EXTERNAL  
TRANSFORMERS):  
Inthejunctionboxontherearoftheoven,connectone  
208 - 240V supply line to the black wire and the other  
208 - 240V supply line to the red wire. Connect the  
electric supply ground wire to the oven ground screw  
located in the junction box. If necessary, have the  
electrician supply the ground wire. Do NOT use the  
wiringconduitorotherpipingforgroundconnections!  
The supply conductors must be of the size (#14 AWG,  
copper) recommended. Refer to the wiring diagrams in  
Section 5 of this manual.  
Allgasovenelectricsupplyconnectionsaremadeviathe  
electrical junction box on the rear of the oven, shown in  
Figure 2-27. The power lines then connect to the oven  
circuits through the Machinery Compartment Access  
PanelSafetySwitch. Thisswitchinterruptselectricpower  
to the oven when the Machinery Compartment Access  
Panel is opened.  
FOR EXPORT OVENS (WITH EXTERNAL  
TRANSFORMERS):  
First,positionthetransformerontheLEFTREARwall  
of the oven (as space permits), and fasten it in place  
usingthesuppliedmountinghardware.  
Then,refertotheappropriatewiringdiagraminSection  
5 of this manual to determine the correct transformer  
connectionsforthesupplylines. Connecttheelectric  
supply ground wire to the oven ground screw located  
in the junction box. If necessary, have the electrician  
supplythegroundwire. DoNOTusethewiringconduit  
or other piping for ground connections!  
Figure 2-26  
Oven Data Plate  
2-12  
SECTION 2  
INSTALLATION  
VII.GAS SUPPLY  
CAUTION  
A. CONNECTION  
Checktheoven’sgassupplyrequirementsbeforemaking  
the gas utility connection. Gas supply requirements are  
listedontheoven’sdataplate(Figure2-26)andintheOven  
Specifications table (Page 1-1 of this manual).  
DURINGPRESSURETESTINGNOTEONEOF  
THEFOLLOWING:  
1. The oven and its individual shutoff valve must  
be disconnected from the gas supply piping  
systemduringanypressuretestingofthatsystem  
at test pressure in excess of 1/2 psi (3.45 kPa).  
Checktheovendataplate(seeFigure2-26)todetermine  
the type of gas (Propane or Natural) to be used with the  
oven.  
2. The oven must be isolated from the gas supply  
piping system by closing its individual manual  
shutoff valve during any pressure testing of the  
gassupplypipingsystemattestpressureequalto  
or less than 1/2 psi (3.45 kPa).  
Refertotheinstructionsinthegashosepackage(included  
in the Base Pad Kit) before connecting the gas line. One  
gas line connection method is shown in Figure 2-28;  
however, compliance with the applicable standards and  
regulations is mandatory.  
Inlet, regulated, and pilot gas pressure readings can be  
taken using a “U” tube manometer at the tap locations  
shown in Figure 2-29.  
3. Ifincomingpressureisover14W.C. (35mbar),  
aseparateregulatorMUSTbeinstalledintheline  
BEFOREtheindividualshutoffvalvefortheoven.  
One 90° elbow equals a 4’ (1.22m) length of pipe. The  
recommendedpipesizesarelargerthanusuallyrequired  
to eliminate any operation problems. It is much less  
expensivetomaketheinitialinstallmentlargeenoughtodo  
the job rather than redoing the job later.  
WARNING: To prevent damage to the  
control valve regulator during initial turn-  
on of gas, it is very important to open the  
manual shutoff valve very slowly.  
After the initial gas turn-on, the manual shutoff  
valve must remain open except during pressure  
testing as outlined in the above steps or when  
necessary during service maintenance.  
NOTE  
The installation must conform with local codes or in the  
absence of local codes, with the National Fuel Gas  
Code, ANSI Z223.1-latest edition.  
In Australia, the installation must conform with AGA  
Code AG601 and with any requirements of the  
appropriatestatutoryauthority.  
CANADIAN:  
CAN/CGA-B 149.1 Natural Gas Installation Code  
CAN/CGA-B149.2PropaneInstallationCode  
Figure 2-27  
UtilityConnectionLocations  
LowerOven  
UpperOven  
Electrical  
Junction Box  
Gas Utility  
Connection  
Gas Utility  
Connection  
Electrical  
Junction Box  
2-13  
SECTION 2  
INSTALLATION  
Certainsafetycoderequirementsexistfortheinstallation  
ofgasovens;refertothebeginningofSection2foralistof  
theinstallationstandards.Inaddition,becausetheovenis  
equipped with casters, the gas line connection shall be  
madewithaconnectorthatcomplieswiththeStandardfor  
ConnectorsforMovableGasAppliances,ANSIZ21.69(in  
U.S.A.), or, if applicable, Connectors for Movable Gas  
Appliances, CAN/CGA-6.16 (in Canada), as well as a  
quick-disconnect device that complies with the Standard  
for Quick-Disconnect Devices for Use With Gas Fuel,  
ANSI Z21.41 (in U.S.A.), or, if applicable, Quick-Discon-  
nectDevicesforUseWithGasFuel,CAN1-6.9(inCanada).  
B. GASCONVERSION  
Itispossibletoconvertovensfromnatural topropanegas,  
orfrompropanetonaturalgas, bychangingthemainand  
pilot orifices.  
WARNING:Allinstallations,conversionsandservicework  
must be performed by an authorized service agent.  
NOTE:InCanada,toconformwiththeCAN/CGA-B149.2  
propane installation code, the oven must be ordered  
propane. It may not be converted in the field.  
Figure 2-28  
Flexible Gas Hose Installation  
To Gas  
Supply Pipe  
Appliance  
Connection/Male  
Nipple  
Full-Flow Gas  
Shutoff Valve  
90°  
Elbow  
Flexible  
Gas Hose  
Figure 2-29  
Gas Burner and Piping Assembly  
Manifold  
pressure  
tap (where  
manifold gas  
pressure is  
measured)  
Inlet pressure  
tap (where  
incoming gas  
pressure is  
measured)  
BurnerBlower  
Gas Burner  
On/Off Knob - Always  
leave in “ON” position  
High Flame  
Solenoid Valve  
Combination Gas  
Control Valve (Safety  
Regulator)  
Pilot pressure tap  
(where pilot gas  
pressure is measured)  
Manual  
Low Flame  
shutoff valve  
Bypass Line  
2-14  
SECTION 3  
OPERATION  
SECTION 3  
OPERATION  
IMPORTANT  
THESE OVENS ARE INTENDED FOR PROFESSIONAL USE ONLY.  
THE OVENS MAY ONLY BE OPERATED BY QUALIFIED PERSONNEL.  
I. LOCATION AND DESCRIPTION OF CONTROLS  
Tandem and  
Tri Tandem and Quad Tandem Ovens  
Double Tandem Ovens  
E. Conveyor Speed  
Display  
G. Conveyor  
Speed  
Controller  
F. Conveyor Speed  
Adjustment Knob  
D. Digital  
Temperature  
Controller  
A. BLOWER Switch  
C. CONVEYOR Switch  
B. HEAT Switch  
Fig. 3-1 - Control Panel  
F. CONVEYOR SPEED ADJUSTMENT KNOB (Tri  
Tandem and Quad Tandem ovens only): Adjusts  
the speed of the conveyor drive motor. The knob is  
only present on oven sections that have a conveyor  
drive motor.  
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.  
B. HEAT Switch: Allows the gas burner to light. Acti-  
vationof thegasburner isdeterminedbythesettings  
on the Digital Temperature Controller.  
G. CONVEYORSPEEDCONTROLLER(Tandemand  
DoubleTandemovensonly): Adjustsanddisplays  
the bake time. This control is only present on oven  
sections that have a conveyor drive motor.  
C. CONVEYOR Switch: Turns the conveyor drive  
motor on and off. This switch is only present on oven  
sections that have a conveyor drive motor.  
D. DIGITALTEMPERATURECONTROLLER: Asolid-  
state, on-off type controller that continuously moni-  
tors the oven temperature. Settings on the Digital  
Temperture Controller control the activation of the  
gas burner.  
NOT SHOWN:  
H. MACHINERY COMPARTMENT ACCESS PANEL  
SAFETY SWITCH: Disconnects electrical power to  
the controls and the blowers when the machinery  
compartment access panel is opened. This panel  
shouldonlybeopenedbyauthorizedserviceperson-  
nel.  
E. CONVEYOR SPEED DISPLAY (Tri Tandem and  
Quad Tandem ovens only): Displays a DC voltage  
value that corresponds to the speed of the conveyor  
drive motor. Higher voltages produce a faster con-  
veyor speed, shortening the bake time. The display  
isonlypresentonovensectionsthathaveaconveyor  
drive motor.  
3-1  
SECTION 3  
OPERATION  
6. TurntheHEATswitchtotheONposition, andwaitfor  
the HEAT ON light to turn on.  
II. NORMAL OPERATION - STEP-BY-STEP  
A. DAILY STARTUP PROCEDURE  
1. Check that the circuit breaker/fused disconnect is in  
theonposition. Iftheovenisequippedwithawindow,  
check that the window is closed.  
, wait for  
2. Turn the BLOWER switch to the “ON” position.  
3. Turn the CONVEYOR switch to the “ON” position.  
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.  
8. (Optional) Press the Temperature Key once to show  
the Actual Temperature in the display, and wait for the  
ACTUAL TEMP light to turn on. This allows you to  
monitortheoventemperatureasitrisestothesetpoint.  
, wait for  
9. Allow the oven to preheat for 10 minutes after it has  
reached the set point temperature.  
4. Adjust the conveyor speed setting, if necessary.  
For TANDEM and DOUBLE TANDEM ovens,  
turn the three thumbwheels to change the dis-  
played bake time.  
B. DAILY SHUTDOWN PROCEDURE  
1. TurntheHEATandBLOWERswitchestoOFF. Note  
thattheblowerswillremaininoperationuntiltheoven  
has cooled to below 200°F (93°C).  
mins  
secs  
+
thumbwheels  
For TRI TANDEM and QUAD TANDEM ovens,  
turn the knob to change the conveyor speed.  
2. Make certain that there are no products left on the  
conveyor inside the oven. Turn the CONVEYOR  
switch to OFF.  
Slower speed,  
Faster speed,  
longer bake time  
shorter bake time  
3. If the oven is equipped with a window, open the  
window to allow the oven to cool faster.  
5. Adjust the temperature controller to a desired set  
temperature, if necessary.  
4. After the oven has cooled and the blowers have  
turnedoff,switchthecircuitbreaker/fuseddisconnect  
to the off position.  
Press the Set Point and Unlock keys at the same  
time. Wait for the SET PT light to turn on.  
, wait for  
CAUTION  
+
Incaseofpowerfailure, turnallswitchestotheOFF”  
position, open the oven window, and remove the  
product. After the power has been restored, perform  
the normal startup procedure.  
Press the Up Arrow and Down Arrow Keys as  
necessary to adjust the setpoint.  
The burner will not operate and gas will not flow  
through the burner without electric power. No  
attempt should be made to operate the oven  
during power failure.  
or  
3-2  
SECTION 3  
OPERATION  
III. QUICK REFERENCE: CALCULATING THE BAKE TIME  
Tandem and Double Tandem ovens display the bake  
time in minutes and seconds. Tri Tandem and Quad  
Tandem ovens, however, show a DC voltage value that  
correspondstothespeedoftheconveyordrivemotor. To  
calculate the bake time in minutes and seconds, perform  
the following procedure.  
With the conveyor running, place a product at the  
entrance end of the conveyor, as shown in Figure 3-  
2. Begin timing with a stopwatch.  
When the leading edge of the product exits the bake  
chamber (as shown in Figure 3-3), end timing.  
The time on the stopwatch is the bake time of the  
oven. The time can be adjusted as described in Part  
II of this chapter (NORMAL OPERATION - STEP-  
BY-STEP).  
Fig. 3-2  
Begin timing  
Fig. 3-3  
End timing  
IV. QUICK REFERENCE: DIGITAL TEMPERATURE CONTROLLER  
HEAT ON Light  
Display  
Lights when the  
burner is in opera-  
tion. Note that this  
light cycles on and  
off during normal  
operation.  
Shows the Set Point  
or the Actual Temp  
in degrees Fahren-  
heit (F) or Celsius  
(C).  
SP LOCK Light  
Lights when the set  
point is locked out  
from changes. This  
setting can only be  
changed by service  
personnel.  
SET POINT Light  
Lights when the set  
point is shown in the  
display.  
OVERTEMP Light  
Lights when the  
oven temperature is  
greater than 650°F  
(343°C). Refer to  
the Troubleshooting  
section.  
ACTUAL TEMP Light  
Lights when the Ac-  
tual Temp is shown  
in the display.  
Temperature Key  
Press this key once  
to view the Actual  
Temp in the Display.  
Service Key  
For use by service  
personnel only.  
Unlock Key  
Set Point Key  
Press this key to-  
Press this key to-  
gether with the Un-  
lock Key to allow the  
Set Point to be  
changed. Changes  
can only be made for  
60 seconds.  
Up Arrow and Down 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.  
gether with the Set  
Point Key to allow  
the Set Point to be  
changed. Changes  
can only be made for  
60 seconds.  
3-3  
SECTION 3  
OPERATION  
V. QUICK REFERENCE: TROUBLESHOOTING  
SYMPTOM  
PROBLEM  
SOLUTION  
The oven temperature  
exceeded650°F(343°C),  
and the burner was auto-  
matically shut down.  
Follow the procedures under DAILY SHUTDOWN  
PROCEDURES to shut down the oven. Contact your  
Middleby Marshall Authorized Service Agent to deter-  
mine and correct the 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  
incorrectly.  
Checkthatthecircuitbreaker/fuseddisconnectisturned  
on.  
CheckthattheBLOWERSwitchisintheONposition.  
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  
turning the HEAT Switch  
totheONposition. This  
automatically engages a  
safety lockout mode.  
Turn the HEAT switch to the “OFF” position.  
Wait for 60 seconds.  
Repeat the Daily Startup procedure.  
The oven did not reach  
200°F (93°C) within 15  
minutes of startup, and  
the oven has stopped  
heating.  
Turn the BLOWER Switch to the “OFF” position.  
Wait for 30 seconds.  
Repeat the Daily Startup procedure.  
appears in display,  
oven is not heating  
Oven will not heat  
Controls may be set in-  
correctly.  
Check that both the BLOWER and HEAT Switches are  
in the “ON” position.  
If the oven still will not heat, turn the BLOWER Switch  
to the “OFF” position.  
Wait for 30 seconds.  
RepeattheDailyStartupprocedure. CheckthattheSet  
Point is above 200°F (93°C).  
Oven is operating, but  
little or no air is blowing  
from air fingers  
Airfingersmayhavebeen  
reassembled incorrectly  
after cleaning.  
Turn the oven off, and allow it to cool. Disconnect  
electrical power to the oven.  
Refer to Section 4, Maintenance, for instructions on  
reassembling the air fingers.  
Conveyor moves with a  
jerky motion, or will not  
move at all  
Conveyor may be  
jammed on an object in  
theoven,orconveyorbelt  
ordrivechaintensionmay  
be incorrect.  
Turn the oven off, and allow it to cool. Disconnect  
electrical power to the oven.  
Checkiftheconveyorisblockedbyanobjectinsidethe  
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 in-  
correctly.  
Check that the set temperature and bake time settings  
are correct.  
IF THESE STEPS FAIL TO RESOLVE THE PROBLEM, CONTACT YOUR LOCAL MIDDLEBY  
MARSHALL AUTHORIZED SERVICE AGENT.  
3-4  
SECTION 4  
MAINTENANCE  
SECTION 4  
MAINTENANCE  
WARNING  
Before ANY cleaning or servicing of the oven, 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 the electric supply circuit breaker(s) and disconnect the electric supply to the oven.  
3. If it is necessary to move the oven for cleaning or servicing, disconnect the gas supply connection before  
moving the oven.  
When all cleaning and servicing is complete:  
1. If the oven was moved for servicing, return the oven to its original location. Adjust the legs so that they are  
seated properly on the floor.  
2. Reconnect the gas supply.  
3. Reconnect the electrical supply.  
4. Turn on the full-flow gas safety valve. Test the gas line connections for leaks using approved leak test  
substances or thick soap suds.  
5. Turn on the electric supply circuit breaker(s).  
6. Perform the normal startup procedure.  
WARNING  
Possibility of injury from moving parts and electrical shock exists in this oven. Switch off and lockout/tagout the  
electric supply BEFORE beginning to disassemble, clean, or service any oven. Never disassemble or clean an  
oven with the BLOWER switch or any other circuit of the oven switched on.  
CAUTION  
NEVER use a water hose or pressurized steam-cleaning equipment when cleaning this oven. DO NOT use  
excessive amounts of water, to avoid saturating the oven insulation. DO NOT use a caustic oven cleaner, which  
can damage the aluminized bake chamber surfaces.  
NOTE  
ANY replacement parts that require access to the interior of the oven may ONLY be replaced by a Middleby  
Marshall Authorized Service Agent.  
NOTE  
It is strongly recommended that the 3-Month Maintenance and 6-Month Maintenance procedures in this section  
be performed ONLY by a Middleby Marshall Authorized Service Agent.  
4-1  
SECTION 4  
MAINTENANCE  
Figure 4-1 - Cooling Fan Locations  
I. MAINTENANCE - DAILY  
A. Check that the oven is cool and the power is discon-  
nected, as described in the warning on Page 4-1.  
Cooling Fans - Upper Oven  
(2 fans per oven section)  
B. Clean the outside of the oven with a soft cloth and  
mild detergent.  
B. Clean ALL of the cooling fan grills on the rear of the  
oven with a stiff nylon brush. Locations of the fans  
are shown in Figure 4-1.  
C. Check that ALL cooling fans are operating properly.  
CAUTION  
If a cooling fan is not operating correctly, it must  
be replaced IMMEDIATELY. Operating the  
oven without adequate cooling can seriously  
damage the oven's internal components.  
REAR OF OVEN  
D. Clean the conveyor belts with a stiff nylon brush.  
This is more easily accomplished by allowing the  
conveyor to run while you stand at the exit end of the  
conveyor. Then, brush the crumbs off the conveyor  
as it moves.  
CoolingFans-LowerOven  
(2 fans per oven section)  
E. TANDEM AND DOUBLE TANDEM OVENS ONLY:  
Remove and clean the crumb trays. Be sure to  
replace the trays in the same positions from which  
theywereremoved, becausetheyareNOTidentical.  
See Figure 4-2.  
Figure 4-2  
Crumb Pans  
UpperOven  
(DriveEnd)  
F. OVENSEQUIPPEDWITHWINDOWSONLY: Clean  
the window in place.  
UpperOven  
(IdlerEnd)  
LowerOven  
4-2  
SECTION 4  
MAINTENANCE  
Figure 4-3 - Removing Fingers and Plates  
II. MAINTENANCE - MONTHLY  
AirFinger  
A. Check that the oven is cool and the power is discon-  
nected, as described in the warning on Page 4-1.  
BlankPlate  
B. Remove the conveyor from the oven. (Pages 2-9 to  
2-11 describe the installation of the conveyor; per-  
forming this procedure in reverse allows the con-  
veyor to be removed.)  
C. Slide the air fingers and blank plates out of the oven,  
as shown in Figure 4-3. AS EACH FINGER OR  
PLATE IS REMOVED, WRITE A "LOCATION  
CODE" ON IT WITH A MARKER to make sure that  
it can be reinstalled correctly.  
Example of markings:  
(Top Row)  
T1 T2 T3 T4 T5 T6  
(Bottom Row) B1 B2 B3 B4 B5 B6  
D. TRI TANDEM OVENS ONLY: To remove the air  
fingers from the center section of the oven, the air  
finger retaining screws must be removed. See  
Figure 2-7 (Page 2-5).  
Figure 4-4 - Disassembling the Air Fingers  
Manifold  
Innerplate  
OuterPlate  
E. QUAD TANDEM OVENS ONLY: To remove the air  
fingers from the two center sections of the oven, the  
transition must be disassembled. (Pages 2-7 to 2-8,  
and Page 2-11, describe the assembly of the transi-  
tion. Performing this procedure in reverse allows the  
transition to be disassembled.)  
2.  
Pullouterplate  
straightup  
and off  
3.  
Swing ends of  
innerplateand  
manifoldapart  
F. Disassemble the air fingers as shown in Figure 4-4.  
AS EACH FINGER IS DISASSEMBLED, WRITE  
THE "LOCATION CODE" FOR THE FINGER ON  
ALL THREE OF ITS PIECES. This will help you in  
correctly reassembling the air fingers.  
CAUTION  
Incorrectreassemblyoftheairfingerswillchange  
the baking properties of the oven.  
4.  
Pullinnerplate  
upwards,and  
thenawayfrom  
manifold  
G. Clean the air finger components and the interior of  
the baking chamber using a vacuum cleaner and a  
damp cloth. Refer to the boxed warnings on Page 4-  
1 for cleaning precautions.  
1. Step on lip of manifold  
H. Reassemble the air fingers. Then, replace them in  
the oven, using the "location code" as a guide.  
Figure 4-5 - Checking the Conveyor Belt Tension  
I. Reassemble the conveyor into the oven, and reat-  
tach the drive chain. Once again, refer to Pages 2-  
9 to 2-11 if necessary.  
Lifthere  
J. Check the tension of the conveyor belt as shown in  
Figure 4-5. The belt should lift between 3-4" (75-  
100mm). DO NOT OVERTIGHTEN THE CON-  
VEYOR BELT.  
Conveyor  
adjustment  
screws  
(2perconveyor)  
The belt tension can be adjusted by turning the  
conveyor adjustment screws, locatedat theidler end  
of the conveyor.  
4-3  
SECTION 4  
MAINTENANCE  
III. MAINTENANCE - EVERY 3 MONTHS  
IV. MAINTENANCE - EVERY 6 MONTHS  
A. Check that the oven is cool and the power is discon-  
nected, as described in the warning on Page 4-1.  
A. Check that the oven is cool and the power is discon-  
nected, as described in the warning on Page 4-1.  
B. Vacuum both of the blower motors, and their sur-  
rounding compartments, using a shop vacuum.  
B. Check for excessive wear on the conveyor drive  
motor brushes. The brushes should be replaced if  
they have worn to less than 1/4" (6.4mm) in length.  
C. Tighten all electrical control terminal screws.  
C. Clean and inspect the burner nozzle and electrode  
assembly.  
D. Check (and clean, if necessary) the oven venting  
system, including the flue.  
E. TANDEM AND DOUBLE TANDEM OVENS ONLY:  
Check the conveyor drive shaft bushings and spac-  
ers. Replace the components if they are worn.  
F. TRITANDEMANDQUADTANDEMOVENSONLY:  
Check the conveyor shaft bushings for wear. If  
necessary, lubricate the bearings.  
NOTES:  
4-4  
I. ELECTRICAL WIRING DIAGRAM  
PS360/PS360WB TANDEM AND DOUBLE TANDEM OVENS  
II. ELECTRICAL WIRING DIAGRAM  
PS360/PS360WB TRI TANDEM AND QUAD TANDEM OVENS  
SECTION5  
ELECTRICALSCHEMATICS  
NOTES:  
5-3  
AMIDDLEBYCOMPANY  
Middleby Cooking Systems Group  
1400 Toastmaster Drive  
Elgin, IL 60120  
USA  
(847)741-3300  
FAX (847)741-4406  
Middleby Corp 24-Hour Service Hotline 1-800-238-8444  

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