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
exceeding130Vindicatesthatthesupplyhasa“high”leg.
CONNECTINGA“HIGH”LEGTOTHEOVENVOIDSALL
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. Ifincomingpressureisover14”W.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, turnallswitchestothe“OFF”
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.
CheckthattheBLOWERSwitchisinthe“ON”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
turning the HEAT Switch
tothe“ON”position. 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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