PS300 Series
P/N 41823
Gas and Electric (AGA/UL)
ENGLISH/French/Spanish
Rev. B • V3 • 5/00
PS300 Series Gas and Electric Ovens
Models:
• PS310
Combinations:
• SingleLowerOven
• PS314
• Single Upper Oven on Stand
• DoubleOven(Two-Stack)
• TandemOven
• PS360/360Q/360S
• PS360WB
• PS360EWB
• PS360WB70
• Double(Two-Stack)TandemOven
OWNER'S OPERATING
&INSTALLATION
MANUAL
©2000MiddlebyMarshall, Inc.
is a registered trademark of Middleby Marshall, Inc. All rights reserved.
Middleby Cooking Systems Group
•
1400 Toastmaster Drive
•
Elgin, IL 60120
•
(847)741-3300
•
FAX (847)741-4406
1
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TABLEOFCONTENTS
page
page
SECTION1-DESCRIPTION .................................................... 4
I. OVEN USES ............................................................. 4
IV. THERMOCOUPLEINSTALLATION.......................... 9
V. TANDEMOVENASSEMBLY .................................... 10
VI. CONVEYORINSTALLATION ................................... 12
A. All Non-Tandem Ovens ................................... 12
B. Tandem Oven Models ..................................... 13
VII. FINALASSEMBLY ................................................... 13
VIII. ELECTRICAL SUPPLY ........................................... 14
A. Electric Ovens ..................................................14
B. Gas Ovens ....................................................... 14
C. Ovens with External Transformers .................. 14
D. Connection....................................................... 14
IX. GASSUPPLY .......................................................... 15
A. Gas Utility Rough-In Recommedations .......... 15
B. Connection....................................................... 15
C. Gas Conversion ............................................... 15
II. OVENCOMPONENTS ............................................. 4
A. Crumb Pans ..................................................... 4
B. Conveyor Drive Motor ........................................ 4
C. Conveyor ........................................................... 4
D. End Plugs ......................................................... 4
E. Serial Plate........................................................ 4
F. Window ............................................................. 4
G. Machinery Compartment Access Panel ........... 4
H. Control Compartment Access Panel ............... 4
I.
Control Panel .................................................... 4
J. Eyebrows .......................................................... 4
K. Conveyor End Stop ........................................... 4
L. Gas Burner........................................................ 4
M. Blowers ............................................................. 4
N. Air Fingers ......................................................... 4
III. OVENSPECIFICATIONS ......................................... 4
A. Dimensions ...................................................... 4
B. General Specifications ..................................... 5
C. Gas Orifice and Pressure Specifications ......... 5
D. Electrical Specifications - Gas Ovens .............. 5
E. Electrical Specifications - Electric Ovens ......... 5
SECTION3-OPERATION ...................................................... 16
I.
LOCATION AND DESCRIPTION OF CONTROLS ..16
A. BLOWER ( ) Switch ......................................16
B. HEAT ( ) Switch ............................................16
C. CONVEYOR (
) Switch ............................... 16
D. Conveyor Speed Controller ............................. 16
E. Digital Temperature Controller ........................ 16
F. Machinery Cpt. Access Panel Safety Switch.... 16
SECTION2-INSTALLATION .................................................. 6
II. NORMALOPERATION,STEP-BY-STEP ................. 17
A. Daily Startup Procedures ................................. 17
B. Daily Shutdown Procedures ............................ 17
III. QUICK REFERENCE: DIGITAL TEMP CONTROL . 18
IV. QUICK REFERENCE: TROUBLESHOOTING ........19
I.
INSTALLATIONKIT .................................................. 7
A. Components ..................................................... 7
B. Additional Components - Gas Ovens .............. 7
C. Additional Components - Tandem Ovens........ 7
II. VENTILATIONSYSTEM ............................................ 8
A. Requirements ................................................... 8
B. Recommendations ........................................... 8
C. Other Ventilation Concerns .............................. 8
III. ASSEMBLY ............................................................... 9
A. Stacking ............................................................ 9
B. Stands ............................................................... 9
SECTION4-MAINTENANCE ................................................. 20
I.
MAINTENANCE-DAILY .......................................... 21
II. MAINTENANCE-MONTHLY ................................... 22
III. MAINTENANCE-EVERY3MONTHS ..................... 23
IV. MAINTENANCE-EVERY6MONTHS ..................... 23
V. KEYSPAREPARTSKIT .......................................... 24
3
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SECTION1-DESCRIPTION
K. Conveyor End Stop: Preventsfoodproductsfromfallingoff
the end of the moving conveyor.
I. OVEN USES
PS300 Series Ovens can be used to bake and/or cook a
wide variety of food products, such as pizza, pizza-type
products, cookies, sandwiches and others.
Not Shown:
L. Gas Burner: Heats air, which is then projected to the air
fingers by the blowers.
II. OVEN COMPONENTS - see Figure 1-1.
A. Crumb Pans: Catch crumbs and other material that drop
through the conveyor belt. One crumb pan is located
underneath each end of the conveyor.
M. Blowers: Fans that project hot air from the burner to the air
fingers.
N. AirFingers: Projectstreamsofhotairontothefoodproduct.
B. Conveyor Drive Motor: Moves the conveyor.
C. Conveyor: Moves the food product through the oven.
D. End Plugs: Allow access to the oven's interior.
Fig. 1-1-OvenComponents
B
C
E
D
F
E. Serial Plate: Provides specifications for the oven that affect
installation and operation. Refer to Section 2, Installation,
for details.
F. Window (on ovens so equipped): Allows the user to see
and access food products inside the baking chamber.
G. Machinery Compartment Access Panel: Allows access to
the oven's interior components. No user-servicable parts
are located in the machinery compartment.
H
A
H. ControlCompartmentAccessPanel: Allowsaccesstothe
control components. This panel is combined with the
Machinery Compartment Access Panel on PS360EWB and
WB70 ovens. No user-servicable parts are located in the
control compartment.
I
G
K
J
I.
Control Panel: Location of the operating controls for the
oven. Refer to Section 3, Operation, for details.
J. Eyebrows (on ovens so equipped): Can be adjusted to
various heights to prevent heat loss into the environment.
III. OVEN SPECIFICATIONS
A. Dimensions
PS310
PS314
PS360/360Q/360S PS360Tandem
PS360WB PS360WBTandem PS360EWB
PS360WB70
Overall Height
Lower oven,
with top & legs
45-1/2”
1143mm
45-1/2”
1143mm
45-1/2”
1143mm
45-1/2”
1143mm
45-1/2”
1143mm
45-1/2”
1143mm
45-1/2”
1143mm
45-1/2”
1143mm
Upper oven,
with stand and top
64-1/2"
1638mm
64-1/2"
1638mm
64-1/2"
1638mm
64-1/2"
1638mm
64-1/2"
1638mm
64-1/2"
1638mm
64-1/2"
1638mm
64-1/2"
1638mm
Double oven
(two-stack)
82-1/4”
2089mm
82-1/4”
2089mm
82-1/4”
2089mm
82-1/4”
2089mm
82-1/4”
2089mm
82-1/4”
2089mm
82-1/4”
2089mm
82-1/4”
2089mm
Overall Depth
i
nc. rear shrouds
39”
991mm
39”
991mm
47"
1194mm
47"
1194mm
55"
1397mm
55"
1397mm
60"
1524mm
55"
1397mm
and front window
inc. rear shrouds
(no window)
36"
914mm
36"
914mm
44"
1118mm
44"
1118mm
52"
1321mm
52"
1321mm
--
--
--
--
Overall Length
90-1/2"
2299mm
70-3/4"
*
90-1/2"*
2299mm*
144-1/2"
3670mm
90-1/2"
2299mm
144-1/2"
3670mm
90-1/2"
2299mm
106"
2692mm
1797mm
*
* NOTE: The PS314 and PS360Q dimensions do NOT include the optional end trays.
Conveyor Width
Single Belt
24"
610mm
24"
610mm
32"
813mm
32"
813mm
40"
1016mm
40"
1016mm
44"
1118mm
40"
1016mm
Split Belt,
identical width
--
--
2x15"
381mm
2x15"
381mm
2x19"
483mm
2x19"
483mm
2x21"
533mm
2x19"
483mm
Split Belt,
unequal width
--
--
--
--
1x13"/330mm
AND
1x26"/660mm
1x13"/330mm
AND
1x26"/660mm
1x14"/356mm
AND
1x28"/711mm
1x13"/330mm
AND
1x26"/660mm
Recommended Minimum Clearances
Rear of oven (inc.
rear shrouds) 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
4
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SECTION1-DESCRIPTION
B. General specifications (per oven cavity)
PS310
PS314
PS360/360Q/360S
PS360WB
PS360EWB
PS360WB70
Weight
1165lbs./529kg
1165lbs./529kg
1285lbs./583kg
1485lbs./674kg
1620lbs./733kg
1695lbs./767kg
129 ft.3/3.65m3
1825lbs./829kg
Shipping Weight
Shipping Carton Vol.
1241lbs./563kg
105 ft.3/2.98m3
1241lbs./563kg
105 ft.3/2.98m3
1360lbs./617kg
106 ft.3/3.00m3
1560lbs./708kg
129 ft.3/3.65m3
1900lbs./863kg
164 ft.3/4.65m3
Rated Heat Input
Gas
135,000BTU
135,000BTU
135,000BTU
170,000BTU
175,000BTU
175,000BTU
34,020kcal,40kw/hr. 34,020kcal,40kw/hr. 34,020kcal,40kw/hr. 42,840kcal,50kw/hr. 44,100kcal,52kw/hr. 44,100kcal,52kw/hr.
Electric
26kw/hr.
26kw/hr.
26kw/hr.
--
--
--
Max.OperatingTemp.
Air Blowers
< - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 550°F/288°C - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - >
< - - - - - - - - - - - - - - - - 2 blowers at 1550 ft.3 (43.9m3)/min. at 1700 RPM, 0.88"/2.2cm water static pressure - - - - - - - - - - - - - - - >
Air Jet Velocity (avg.) < - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 2600 ft./min. (1320cm/sec.) - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - >
Warmup Time < - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 15minutes - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - >
C. Gas orifice and pressure specifications - for gas-fired ovens (per oven cavity)
Main Orifice I.D.
Pilot
Bypass
Supply (inlet)
pressure
Manifold
pressure
PS310
PS314
PS360/360Q/360S PS360WB
PS360EWB
PS360WB70
Orifice I.D.
Orifice I.D.*
0.065”/#53drill
1.65mm
Natural Gas
Propane
0.219”
5.56mm
0.219”
5.56mm
0.219”
0.250”
6.35mm
0.250”
6.35mm
0.250”
6.35mm
0.028”
0.71mm
6-12" W.C.
14.9-29.9mbar
3-1/2" W.C.
8.7mbar
5.56mm
0.134"
3.40mm
0.134"
3.40mm
0.134"
3.40mm
0.152"
3.86mm
0.165"
4.19mm
0.165"
4.19mm
0.018"
0.46mm
0.034"/#62drill
0.86mm
11-14"W.C.
27.4-34.9mbar
10" W.C.
24.9mbar
* NOTE: The PS360EWB gas oven does not use a bypass orifice.
D. Electrical specifications - for gas-fired ovens (per oven cavity)
Main Blower
Voltage
Control
Circuit Voltage
Current
Draw
Phase
Freq.
Poles
Wires
PS310/314/360/360Q/
360S/360WB
208-240V
120V
1 Ph
1 Ph
1 Ph
60 Hz
10A
10A
10A
3 Pole
2Pole
2Pole
4 Wire (2 hot, 1 neut, 1 gnd)
3 Wire (2 hot, 1 gnd)
208-240V(export)
200-220V(export)
120V(transformer)
120V(transformer)
50/60 Hz
50/60 Hz
3 Wire (2 hot, 1 gnd)
PS360EWB/WB70
208-240V
120Vconveyorspeed
controller(transformer);
all other control cicuits
asperline(208-240V)
1 Ph
60 Hz
12A
2Pole
3 wire (2 hot, 1 gnd)
E. Electrical specifications - for electrically-heated ovens (per oven cavity)
Main Blower
Voltage
Control
Circuit Voltage
Current
Draw
k W
Rating
Phase
Freq.
Poles
Wires
208-240V
120V
120V
3 Ph
60 Hz
67.3Aat208V
58.4Aat240V
26.0 kW at 208V
26.0 kW at 240V
4Pole 5 Wire (3 hot, 1 neut, 1 gnd)
(with 3 Ph blower motors)
208-240V
(with 1 Ph blower motors)
3 Ph
3 Ph
60 Hz
67.3Aat208V
58.4Aat240V
26.0 kW at 208V
26.0 kW at 240V
4Pole 5 Wire (3 hot, 1 neut, 1 gnd)
200-220V(export)
120V(transfomer)
50/60 Hz
67.3Aat208V
53.5Aat220V
24.3 kW at 208V
20.4 kW at 220V
3Pole
4 Wire (3 hot, 1 gnd)
240V(export)
380V(export)
400-416V(export)
480V
120V(transformer)
120V(transformer)
120V(transfomer)
120V(transformer)
3 Ph
3 Ph
3 Ph
3 Ph
50/60 Hz
50/60 Hz
50/60 Hz
60 Hz
58.4A
36.8A
33.8A
29.2A
26.0 kW
24.3 kW
24.3 kW
26.0 kW
3Pole
3Pole
3Pole
3Pole
4 Wire (3 hot, 1 gnd)
4 Wire (3 hot, 1 gnd)
4 Wire (3 hot, 1 gnd)
4 Wire (3 hot, 1 gnd)
IMPORTANT
Additional electrical information is provided on the oven's serial plate, and on the wiring diagram inside the machinery
compartment.
5
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SECTION2-INSTALLATION
WARNING - After any conversions, readjustments, or service work on the oven:
•
•
•
•
Perform a gas leak test.
Test for correct air supply, particularly to the burner blower.
Test for proper combustion and gas supply.
Check that the ventilation system is in operation.
WARNING
Keep the appliance area free and clear of combustibles.
WARNING
The oven must be installed on an even (level) non-flammable flooring and any adjacent walls must
be non-flammable. Recommended minimum clearances are specified in the Description section of
this Manual.
WARNING
Do not obstruct the flow of combustion and ventilation air to and from your oven. There must be no
obstructions around or underneath the oven. Constructional changes to the area where the oven is
installed shall not affect the air supply to the oven.
CAUTION
For additional installation information, refer to the following documents:
PS360Pre-InstallationProceduresManual(MiddlebyMarshallP/N88210-0024)
PS360 Installation Manual(Middleby Marshall P/N 88210-0025)
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 proper operation.
NOTE
An electrical wiring diagram for the oven is located inside the machinery compartment or control
compartment.
NOTE
All aspects of the oven installation, including placement, utility connections, and ventilation requirements,
must conform with any applicable local, national, or international codes. These codes supercede the require-
ments 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 accor-
dance 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 require-
ments of the appropriate statutory authority.
6
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SECTION2-INSTALLATION
I. INSTALLATION KIT
Fig. 2-1-InstallationKit
5
6
4
7
8
11
3
1
10
2
9
12
A. Installation kit components (one kit required per cavity)
Item
1
Description
PartNumber
22450-0028
37115-0102
35000-1099
LowerOvenw/oTop LowerOvenw/Top
UpperOven
Legs, adjustable
4
4*
1
4
4*
1
--
4*
1
2*
Caster, Swivel (with stud)
Conveyor End Stop - PS310/314
3a
3b
Conveyor End Stop - PS360/360S
• Single Belt
• Split Belt
35000-1103
35509
1
2
1
2
1
2
3c
3c
3d
Conveyor End Stop - PS360Q
37000-0524
36526
1
1
1
1
1
1
Conveyor End Stop - PS360WB/WB70 (Single or Split Belt)
Conveyor End Stop - PS360EWB
• Single Belt
• Split Belt: 2x21"/533mm belts
• Split Belt: 1x14"/356mm belt +
1x28"/711mm belt
35900-0370
35900-0370
35509
2
2
1
1
2
2
1
1
2
2
1
1
35000-1099
4
5
Attachment Plate, upper oven
Thermocouple
35122-0049
33812-1
--
2
2
1
2
1
1
--
2
2
1
2
1
1
2
2
6
Screw, #10-32 x 3/8"
21256-0008
27276-0001
21292-0001
41823
2
7
CableClamp
1
8
Screw, #2PT 10-16 x 3/4" HWH
Owner's Operating and Installation Manual
Authorized Service Agency Listing
14
1
9
10
1002040
1
NOTE
* The 4 swivel casters (Item 2) are pre-attached to each oven cavity for ease of movement during installation.
B. Additional installation kit components for gas ovens
Item
6
Description
PartNumber
21256-0008
21292-0001
22361-0001
30773
LowerOvenw/oTop LowerOvenw/Top
UpperOven
Screw, #10-32 x 3/8"
Screw, #2PT 10-16 x 3/4" HWH
Gas hose, flexible
1
2
1
2
1
2
8
11
1
1
1
12a
12b
12c
Flue vent, 14" (356mm)
Flue vent, 29-1/2" (749mm)
Flue vent, 50" (1270mm)
--
--
1
1
--
1
30759
--
--
30758
--
C. Additional installation kit components for tandem ovens (not shown)
Item
--
Description
PartNumber
35000-1454
35000-1456
35000-1457
37200-0013
32483
TandemOven
Double(2-stack)TandemOven
Machinery Compartment Trim Strip
Front Gasket Spacer
1
2
2
1
1
2
4
4
2
2
--
--
Rear Gasket Spacer
--
Baking Chamber Gasket and Frame - PS360
Baking Chamber Gasket and Frame - PS360WB
--
7
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SECTION2-INSTALLATION
B. Recommendations
II. VENTILATION SYSTEM
NOTE THAT THE HOOD DIMENSIONS SHOWN IN FIGURE 2-
2 ARE RECOMMENDATIONS ONLY. LOCAL AND NATIONAL
CODES MUST BE FOLLOWED WHEN INSTALLING THE
VENTILATION SYSTEM. ANY APPLICABLE LOCAL AND
NATIONAL CODES SUPERSEDE THE RECOMMENDATIONS
SHOWN IN THIS MANUAL.
IMPORTANT
Where national or local codes require the
installation of fire suppression equip-
ment or other supplementary equipment,
DO NOT mount the equipment directly to
the oven.
The rate of air flow exhausted through the ventilation system may
vary depending on the oven configuration and hood design.
Consult the hood manufacturer or ventilation engineer for these
specifications.
MOUNTING SUCH EQUIPMENT ON
THE OVEN MAY:
To avoid a negative pressure condition in the kitchen area, return
air must be brought back to replenish the air that was exhausted.
A negative pressure in the kitchen can cause heat- related
problems to the oven components as if there were no ventilation
at all. The best method of supplying return air is through the
heating,ventilationandairconditioning(HVAC)system. Through
the HVAC system, the air can be temperature-controlled for
summer and winter. Return air can also be brought in directly
from outside the building, but detrimental effects can result from
extreme seasonal hot and cold temperatures from the outdoors.
• VOID AGENCY CERTIFICATIONS
• RESTRICT SERVICE ACCESS
• LEAD TO INCREASED SERVICE
EXPENSES FOR THE OWNER
A. Requirements
NOTE: Return air from the mechanically driven system must not
blow at the opening of the baking chamber. Poor oven baking
performance will result.
CAUTION
•
A mechanically driven ventilation system is REQUIRED for
gas oven installations.
C. Other ventilation concerns
•
Special locations, conditions, or problems may require the
services of a ventilation engineer or specialist.
•
A mechanically driven ventilation system is STRONGLY
RECOMMENDED for electric oven installations.
•
•
Inadequate ventilation can inhibit oven performance.
PROPER VENTILATION OF THE OVEN IS THE
RESPONSIBILITY OF THE OWNER.
It is recommended that the ventilation system and duct work
be checked at prevailing intervals as specified by the hood
manufacturer and/or HVAC engineer or specialist.
Fig. 2-2 - Ventilation System
2"/51mm
minimum
18"
18"
12"
3"
458mm
458mm
305mm
76mm
8
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SECTION2-INSTALLATION
Figure 2-3 - Exploded View, Oven Stand
III. ASSEMBLY
A. Stacking
If the installation will include upper ovens mounted atop lower
ovens:
1. Remove the casters (pre-attached to each oven cavity) from
the upper ovens.
Attachment
plates inc. w/
upper oven
2. Stack the oven cavities. If necessary, refer to the Installation
Manual for Model PS310/360 Ovens (Middleby P/N 88210-
0025).
installation kit
B. Stands
If the installation includes ovens that are to be mounted on
stands:
•
Remove the casters (pre-attached to each oven cavity) and
install them on the stands as shown in Figure 2-3.
•
Assemble the ovens to the stands. An exploded view of the
stand is shown in Figure 2-3.
Casters inc.
w/oven
C. FlueVent(s)
For gas ovens, attach one flue vent to the rear wall of each oven
cavity. Use one #10-16 x 3/8" and two #10-32 x 3/4" screws for
each flue vent. These screws are provided in the Installation Kit.
Figure 2-4 - Thermocouple Installation Locations
Thermocouples
IV. THERMOCOUPLE INSTALLATION
1. Install one thermocouple sensing bulb into each of the two
holes in the rear panel of the oven, as shown in Figure 2-4.
Fasten each thermocouple in place using one of the #10-
32 x 3/8" screws supplied in the Installation Kit.
2. Thread BOTH sets of thermocouple leads through the
grommet and into the machinery compartment, as shown
in Figure 2-4.
3. Remove the right-side access panel of the machinery
compartment.
Grommet-protected hole
4. Thread the thermocouple leads through the side of the
machinery compartment as shown in Figure 2-5, and into
theelectricalbox(attheright-frontofthemachinerycompart-
ment).
Figure 2-5 - Placing the Thermocouple Leads
5. Connect BOTH sets of thermocouple leads to the tempera-
ture controller as shown in Figure 2-6. Note that the two
thermocouples are now tied together at the temperature
controller.
6. Replace the right-side panel of the machinery compart-
ment.
7. Repeat Steps 1-6 for any other oven cavities in the installa-
tion.
Figure 2-6 - Thermocouple Lead Connections
8=White=Positive
7=Red=Negative
R=No Connection
Ground=Shieldedcable
9
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SECTION2-INSTALLATION
2. Check that the top and bottom air finger retaining screws are
present on all mating ends of the oven sections. See Figure
2-7. The screws prevent the air fingers from sliding in
between the oven sections.
V. TANDEM OVEN ASSEMBLY
NOTE
For non-tandem oven installations, skip ahead to Section VI,
Conveyor Installation.
3. Remove the rear axial cooling fans that are adjacent to the
matingsidesoftheovens. Thefansmayeitherbecompletely
disconnected, or left attached by their wiring as shown in
Figure 2-8.
1. Determine the proper position of the ovens by referring to
Figure 2-7. Then, move the ovens to their approximate final
locations.
Figure2-7
OvenPositioningandAlignment
RIGHTOVEN
LEFTOVEN
Alignment
plate
Air finger
retaining
screws
Slot for
alignment
plate
Sealing gasket
assembly
(pre-mounted)
NOTE: The Sealing Gasket Assembly may
be pre-mounted to EITHER of the oven
cavities.
Figure2-8-CoolingFanRemoval
Mating surface of
ovens (shown
from lower rear)
Wiring is still
connected
10
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SECTION2-INSTALLATION
4. Insert three of the supplied 1/2 x 5” bolts through the holes
in the frame of the right oven, pointing outward as shown in
Figure 2-9. Then, slide the spacers into place on the bolts.
Figure 2-9 - Bolts and Spacers
2-1/2" x 2-1/2"
(64x64mm)
spacers
2-1/2" x 8"
(64x203mm)
spacers
5. Push the ovens together. Check that the mounting bolts,
alignment plate, and sealing gasket are all properly aligned.
See Figure 2-10.
Figure 2-10 - Aligning the Sections
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 necessary to loosen the
connecting bolts and realign the ovens.
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.
Trim strip
11
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SECTION2-INSTALLATION
Figure 2-12 - Removing the Conveyor Drive Sprocket
VI. CONVEYOR INSTALLATION
Refer to either Step A or Step B in this section, as appropriate,
to install the conveyor and belt.
A. InstallingtheConveyor-AllovensEXCEPTTandem models
NOTE
Split belt conveyors can only be installed from the end of the oven
with the drive motor.
Single-belt conveyor assemblies may be inserted into either
end of the oven. If it is to be installed from the end of the oven
without the drive motor, the drive sprocket assembly must be
removed.
To remove the drive sprocket (if necessary), loosen the set screw
on the conveyor collar as shown in Figure 2-12. Then, pull the
sprocket assembly straight out.
Loosen conveyor collar
set screw, then pull shaft
straight out
1. Lift the conveyor and position it in the oven as shown in
Figure 2-13.
Figure 2-13 - Inserting the Conveyor
1
2
3
2. Continue moving the conveyor into the oven until the frame
protrudes equally from each end of the oven (about 18"/
457mm).
Figure 2-14 - Conveyor retainers
3. Check that the retainers located on the underside of the
conveyor frame rest firmly against the lower end plug, as
shown in Figure 2-14.
NOTE:
PS360EWB ovens have a retainer bracket that extends the
full width of the conveyor frame on both ends of the frame.
All other ovens have retainer clips as shown in Figure 2-14,
located on the drive (left) side of the frame only.
Retainers on both ends of
PS360EWB, drive side
only for all other ovens
4. When the conveyor is positioned properly, check for free-
dom of movement of the conveyor belt by pulling it for about
2-3 feet (60 to 90 cm) with your fingers. The conveyor must
move freely.
Figure 2-15 - Checking the conveyor tension
5. If the drive sprocket was removed when installing the
conveyor, replace it at this time.
3-4"
(75-100mm)
vertical
6. Install the drive chain between the conveyor drive sprocket
and the motor sprocket. To install the chain, it will be
necessary to lift the drive end of the conveyor slightly. The
drive motor and sprocket are shown in Figure 2-12.
deflection
7. Install the conveyor drive motor cover and tighten its hanger
screw (on the rear wall of the oven).
Conveyor
8. Check the tension of the conveyor belt as shown in Figure
2-15. The belt should lift between 3-4" (75-100mm). DO
NOT OVERTIGHTEN THE CONVEYOR BELT.
tension
adjustment
screws (idler
end only)
NOTE:
If necessary, the belt tension can be adjusted by turning the
conveyor adjustment screws, located at the idler (right) end
of the conveyor. See Figure 2-15.
12
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SECTION2-INSTALLATION
B. Installing the Conveyor and Belt - Tandem oven models
Figure 2-17 - Tandem Conveyor Installation
NOTE
For non-tandem oven installations, skip ahead to Section VII,
Final Assembly.
Hinged
end section
1. Insert the conveyor frame into the oven as follows:
Slide one hinged conveyor frame section into each end of
theoven. Thetwosectionsbuttagainsteachotheratthegap
between the two oven sections. See Figure 2-17.
IMPORTANT
Hinged
end section
Be sure that the drive section of the conveyor frame is at the
same end of the oven as the conveyor drive motor.
2. Slide the conveyor belt through the support rods underneath
the frame, and thread it through the oven. Then, reach
through the oven window and pull the free end of the belt
through the oven so that it lies atop the conveyor frame.
Figure 2-18 - Conveyor and Inside Master Link Orientation
Direction
of travel
CORRECT
master link
After the belt has been pulled through the oven, check the
following:
position
•
The conveyor belt links must be oriented as shown in
Figure 2-18.
•
The smooth side of the conveyor belt must face UP.
Incorrect
master link
position
3. Connect the inside master links. Check that the links are
oriented as shown in Figure 2-18.
4. Connect the outside master links. Note that the outside
master links have right and left sides. The right-side master
link has an open hook facing you, as shown in Figure 2-19.
Figure 2-20 - Drive Motor for
TandemOvenHeavy-Duty
ConveyorFrame
Figure 2-19 - Outside Master
LinkOrientation
5. Check for freedom of movement of the conveyor belt by
pullingitforabout2-3feet(60to90cm)withyourfingers. The
conveyor must move freely.
Direction
of travel
6. Check the tension of the conveyor belt as shown in Figure
2-15 (on the previous page). The belt should lift between 3-
4"(75-100mm). DONOTOVERTIGHTENTHECONVEYOR
BELT. If necessary, the belt tension can be adjusted by
turning the conveyor adjustment screws, located at the idler
(right) end of the conveyor.
7. LOOSELY attach the conveyor drive motor to the end wall of
the oven. Refer to Figure 2-12 (for ovens with standard
conveyor frames) or Figure 2-20 (for ovens with heavy-duty
conveyor frames).
Figure 2-21 - Crumb tray positions
8. Assemble the conveyor drive chain in place on the motor and
conveyor drive sprockets.
Upper Oven
(Drive End)
9. Position the motor to adjust the deflection of the drive chain
to 3/4” (19mm). DO NOT OVERTIGHTEN THE DRIVE
CHAIN. Then, tighten the bolts to hold the motor in place.
Upper Oven
(Idler End)
VII. FINAL ASSEMBLY
1. Assemble the end plugs and motor housing onto the oven.
These components are shown in Figure 1-1 (on Page 1).
2. Slide the conveyor extensions over the ends of the conveyor
frame. Be sure that the extension with the drive sprocket
opening is placed on the drive end.
Lower Oven
NOTE
The PS360EWB oven does not use conveyor extensions.
Figure 2-22 - Crumb trays, extensions, and end stop
3. RefertoFigure2-21forthecorrectlocationofeachcrumbtray.
Then, install the crumb trays underneath the conveyor as
shown in Figure 2-22. First, place the inside edge of the tray
onto the bracket attached to the end plug. Then, swing the
outside edge of the tray up and into place.
Conveyor extension
Conveyor frame
End stop
4. Press the end stop down over the edge of the conveyor
extension at the exit end of the oven. See Figure 2-22.
5. After the oven is moved to its final location, adjust the bottom
section of the legs so that the oven is level and the casters
do not touch the floor.
Crumb tray
13
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SECTION2-INSTALLATION
CAUTION
VIII. ELECTRICAL SUPPLY (all ovens)
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 exceeding 130V
indicates that the supply has a “high” leg. CONNECTING A
“HIGH” LEG TO THE OVEN VOIDS ALL OVEN WARRANTIES.
Connecting a “high” leg to the black lead of the oven can severely
damage the oven’s electrical and electronic components.
WARNING
Authorized supplier personnel normally accomplish
the connections for the ventilation system, electric supply,
andgassupply,asarrangedbythecustomer. Followingthese
connections,thefactory-authorizedinstallercanperformthe
initial startup of the oven.
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
DONOTCONNECTBLACKWIRETOHIGHLEG.
VOLTAGEOFTHEBLACKANDWHITEWIRESMUST
BENOHIGHERTHAN130VAC.
NOTE: The electric supply connection must meet all national
and local electrical code requirements.
A. AdditionalInformation-ElectricOvens
For electric ovens, a 1-1/4" (32mm) dia. cutout in the back
wall of the machinery compartment provides access for the
electrical supply connections. Using flexible cables for the
electric power supply conductors requires a 1-1/4" (32mm)
strain-relief fitting (not furnished with the oven) to enable
safe access to the terminal block from which power is
distributed to the oven.
Check the oven serial plate before making any electric supply
connections. Electric supply connections must agree with data
on the oven serial plate. The location of the serial plate is shown
in Figure 2-23.
A fused disconnect switch or a main circuit breaker (customer
furnished) MUST be installed in the electric supply line for each
oven cavity. It is recommended that this switch/circuit breaker
have lockout/tagout capability.
B. AdditionalInformation-GasOvens
All gas oven electric supply connections are made via the
electrical junction box on the rear of the oven, shown in
Figure 2-24. The power lines then connect to the oven
circuits through the Machinery Compartment Access Panel
Safety Switch. This switch interrupts electric power to the
oven when the Machinery Compartment Access Panel is
opened.
The supply conductors must be of the size and material (copper)
recommended. Refer to the wiring diagram inside the machin-
ery compartment or control compartment of the oven. Electrical
specifications are also listed on the oven's serial plate (Figure
2-23) and in the Electrical Specifications table (on Page 5).
The oven requires a ground connection to the oven ground screw
located in the electrical junction box. (The box is shown in Figure
2-24.) If necessary, have the electrician supply the ground wire.
Do NOT use the wiring conduit or other piping for ground
connections!
C. AdditionalInformation-OvenswithExternalTransform-
ers (export versions)
Position the transformer on the rear wall of the oven, on the
same side as the control compartment, as space permits.
Fasten it in place using the supplied mounting hardware.
Figure 2-23 - Oven Serial Plate
D. Connection
Refer to the wiring diagram inside the machinery
compartment or control compartment of the oven to
determine the correct connections for the electrical supply
lines. Connect the supply as indicated on the wiring
diagram. Be sure to connect the electrical supply ground
wire to the oven ground screw located in the junction box
on the rear of the oven.
Serial plate location
Figure 2-25 - Flexible Gas
HoseInstallation
Figure2-24-UtilityConnectionLocations
Electrical
Junction Box
To Gas
Supply Pipe
Appliance
Connection/Male
Nipple
Gas oven:
3/4" (19mm) pipe for
gas utility connection
Full-Flow Gas
Shutoff Valve
90°
Elbow
Electric oven:
1-1/2" (38mm) conduit for
electric utility connection
Flexible
Gas Hose
NOTE: The location of these
components may vary slightly
depending on the oven model.
14
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SECTION2-INSTALLATION
IX. GAS SUPPLY (gas ovens only)
CAUTION
3. If incoming pressure is over 14” W.C. (35mbar), a sepa-
rate regulator MUST be installed in the line BEFORE the
individualshutoffvalvefortheoven.
DURINGPRESSURETESTINGNOTEONEOFTHEFOLLOWING:
1.Theovenanditsindividualshutoffvalvemustbediscon-
nectedfromthegassupplypipingsystemduringanypres-
sure testing of that system at test pressure in excess of 1/
2 psi (3.45 kPa).
WARNING: To prevent damage to the control valve regula-
tor during initial turn- on of gas, it is very importanttoopen
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 mainte-
nance.
2. The oven must be isolated from the gas supply piping
systembyclosingitsindividualmanualshutoffvalveduring
anypressuretestingofthegassupplypipingsystemattest
pressure equal to or less than 1/2 psi (3.45 kPa).
A. GasUtilityRough-InRecommendations
NOTE
The following gas system specifications are STRONGLY
RECOMMENDED. Deviating from these recommendations
may affect the baking performance of the oven.
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.
Gas Meter
In Australia, the installation must conform with AGA Code AG601
and with any requirements of the appropriate statutory authority.
•
•
One or two oven cavities: 750 cfh meter
Three or four oven cavities: 1200 cfh meter
CANADIAN:
CAN/CGA-B 149.1 Natural Gas Installation Code
CAN/CGA-B 149.2 Propane Installation Code
Gas Line
•
•
•
•
DEDICATED LINE from the gas meter to the oven
2" (50.8mm) pipe for natural gas
1-1/2" (38.1mm) pipe for propane
Maximum length: 200' (61m). Each 90° elbow equals 7'
(2.13m) of pipe.
Certain safety code requirements exist for the installation of gas
ovens; refer to the beginning of Section 2 for a list of the
installation standards. In addition, because the oven is equipped
with casters, the gas line connection shall be made with a
connector that complies with the Standard for Connectors for
Movable Gas Appliances, ANSI Z21.69 (in U.S.A.), or, if appli-
cable, 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-
DisconnectDevicesforUseWithGasFuel,CAN1-6.9(inCanada).
B. Connection
Check the oven’s gas supply requirements before making the
gas utility connection. Gas supply requirements are listed on the
oven’s serial plate (Figure 2-23) and in the Gas Orifice and
Pressure Specifications table (Page 5 of this manual).
Check the serial plate to determine the type of gas (Propane or
Natural) to be used with the oven.
C. GasConversion
Refer to the instructions in the gas hose package (included in the
Installation Kit) before connecting the gas line. One gas line
connectionmethodisshowninFigure2-25;however,compliance
with the applicable standards and regulations is mandatory.
Where permitted by local and national codes, it is possible to
convert ovens from natural to propane gas, or from propane to
natural gas. Use the appropriate Middleby Marshall Gas
Conversion Kit for the specific oven model.
Inlet, regulated, and pilot gas pressure readings can be taken
using a “U” tube manometer at the tap locations shown in Figure
2-26.
WARNING
The terms of the oven's warranty require all start-ups,
conversions and service work to be performed by a Middleby
Marshall Authorized Service Agent.
Figure 2-26 - Gas Burner and Piping Assembly
Model PS360EWB Only
Manifold pressure tap
(where manifold gas
pressure is measured)
Burner
Blower
Modulating gas valve
NOTE: PS360EWB ovens use a
modulating gas valve INSTEAD OF
a high flame solenoid valve and
low-flame bypass line.
On/Off Knob
Always leave in
“ON” position
Inlet pressure tap
(whereincoming
gas pressure is
measured)
Gas Burner
High Flame
Solenoid Valve
Pilot pressure tap
(where pilot gas
pressure is measured)
Combination Gas
Control Valve
(Safety Regulator)
Manual
shutoff valve
Low Flame
Bypass Line
15
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SECTION3-OPERATION
I. LOCATION AND DESCRIPTION OF CONTROLS
Fig. 3-1 - Control Panel
All ovens except PS360EWB and PS360WB70
PS360EWB and PS360WB70 only
D.
E.
D.
Conveyor Speed
Digital Temperature
Conveyor Speed
(or " ")
(or "
")
(or " ")
controller(s)
controller(s)
controller
A.
B.
"HEAT"
C.
"CONVEYOR"
(or " ")
switch
E.
A.
B.
"HEAT"
C.
"BLOWER"
Digital Temperature
"BLOWER"
"CONVEYOR"
(or "
switch
")
(or "
switch
")
(or "
switch
")
(or "
switch
")
(or "
switch
")
(or " ")
controller
A.
"BLOWER" Switch: Turns the blowers and D.
cooling fans on and off. The HEAT Switch has no
effect unless the BLOWER Switch is in the “ON”
position.
Conveyor Speed Controller: Adjusts and dis-
plays the bake time. Single-belt ovens have one
controller. Splitbeltovenshaveonecontrollerfor
eachconveyorbelt,labeled"FRONT"and"BACK."
For tandem and double tandem ovens, this
control is present only on the left oven section(s).
B.
C.
"HEAT" Switch: Allows the gas burner to light.
Activation of the gas burner is determined by the
settings on the Digital Temperature Controller.
Digital Temperature Controller: Continuously
monitors the oven temperature. Settings on the
Digital Temperture Controller control the activa-
tion of the gas burner.
E.
"CONVEYOR"Switch: Turnstheconveyordrive
motor on and off. For tandem and double tan-
dem ovens, this switch is present only on the left
oven section(s).
NOT SHOWN:
F. Machinery Compartment Access Panel Safety Switch:
Disconnects electrical power to the controls and the blow-
ers when the machinery compartment access panel is
opened. The panel should only be opened by authorized
service personnel.
16
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SECTION3-OPERATION
7. Wait for the oven to heat to the setpoint temperature. Higher
setpoint temperatures will require a longer wait. The oven
can reach a temperature of 500°F (232°C) in approximately
5 minutes.
II. NORMAL OPERATION - STEP-BY-STEP
A. DAILYSTARTUPPROCEDURE
1. Check that the circuit breaker/fused disconnect is in the on
position. If the oven is equipped with a window, check that
the window is closed.
8. (Optional)PresstheTem-
perature ( ) key to show
wait
for
the Actual Temperature
inthedisplay, andwaitfor
the"ACTUALTEMP"light
to turn on. This allows
you to monitor the oven
temperature as it rises to
the setpoint.
2. Turnthe"BLOWER"(or
)
switch to the “ON” (or "I")
position.
or
or
3. Turnthe"CONVEYOR"(or
) switch to the “ON”
(or "I") position.
9. Allow the oven to preheat for 10 minutes after it has reached
the set point temperature.
B. DAILYSHUTDOWNPROCEDURE
1. Turn the "HEAT" (or
and "BLOWER" (or
)
)
switches to the "OFF" (or
"O") position. Note that
the blowers will remain in
operation until the oven
has cooled to below
200°F (93°C).
mins
secs
4. If necessary, adjust the
conveyor speed setting
by turning the three
thumbwheels to change
the displayed bake time.
+
- - - - - or - - - - -
+
thumbwheels
5. Adjust the temperature controller to a desired set tempera-
ture, if necessary.
2. Make certain that there
arenoproductsleftonthe
conveyor inside the oven.
Turnthe"CONVEYOR"(or
) switch to the "OFF"
•
Press the Set Point
and Unlock keys at
the same time. Wait
for the "SET PT" light
to turn on.
wait
for
or
+
(or "O") position.
3. If the oven is equipped with a window, open the window to
allow the oven to cool faster.
•
Press the Up Arrow
and Down Arrow
Keys as necessary
to adjust the set-
point.
4. After the oven has cooled and the blowers have turned off,
switch the circuit breaker/fused disconnect to the off posi-
tion.
or
IMPORTANT
On gas ovens, if the "HEAT ON" light will not illuminate, OR
if the oven does not heat, the gas burner may not have lit.
Turn the "HEAT" ( ), "BLOWER" ( ), and "CONVEYOR"
6. Turn the "HEAT" (or
)
switch to the "ON" (or "I")
position, and wait for the
"HEAT ON" light to turn
on.
(
) switches to the "OFF" ("O") position. Wait for AT
or
LEAST FIVE MINUTES before restarting the oven. Then,
repeat the Daily Startup procedure.
CAUTION
wait
for
Incaseofpowerfailure, turnallswitchestothe“OFF”(or"O")
position, open the oven window, and remove the product.
After the power has been restored, perform the normal
startup procedure.
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 a power failure.
17
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SECTION3-OPERATION
III. QUICK REFERENCE: DIGITAL TEMPERATURE CONTROLLER
"HEAT ON" Light
Lights when the
burner is in opera-
tion. Note that on all
ovens EXCEPT the
PS360EWB, this light
cycles on and off dur-
ing normal operation.
Display
Shows the Set
Point or theActual
Temperature 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 PT" (setpoint)
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
Quick Reference:
Troubleshooting in
this section.
"ACTUAL TEMP"
Light
Lights when the
Actual Tempera-
ture is shown in
the display.
Service Key
For use by service
personnel only.
Temperature Key
Press this key
once to view the
Actual Tempera-
ture in the Display.
Set Point Key
Press this key to-
gether with the
Unlock Key to al-
low the Set Point
to be changed.
Unlock Key
Press this key together
with the Set Point Key
to allow the Set Point
Up Arrow and Down Arrow
Keys
to
be
changed.
Changes
can
Changes can only be
made for 60 seconds.
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.
only be made for
60 seconds.
18
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SECTION3-OPERATION
V. QUICK REFERENCE: TROUBLESHOOTING
SYMPTOM
PROBLEM
SOLUTION
The oven temperature ex-
ceeded 650°F (343°C), and
the burner was automati-
cally shut down.
•
Follow the procedures under Daily Shutdown Procedures in
this section to shut down the oven. Contact your Middleby
MarshallAuthorizedServiceAgenttodetermineandcorrectthe
cause of the condition to prevent damage to the oven.
light is lit, food product is
undercooked
Oven will not
turn on at all
Electrical power may not be
reaching the oven, or the
controls may be set incor-
rectly.
•
•
Check that the circuit breaker/fused disconnect is turned on.
Check that the "BLOWER" (or
) Switch is in the “ON” (or "I")
position. The burner cannot engage until the blowers are in
operation.
Oven shuts down shortly
after it is turned on
The gas burner did not light
within 90 seconds of turn-
•
Turnthe"HEAT"(or
(or )switches to the "OFF" (or "O") position.
),"BLOWER"(or ),and"CONVEYOR"
ing the "HEAT" (or
)
•
•
Wait for AT LEAST FIVE MINUTES before restarting the oven.
Repeat the Daily Startup procedure.
Switch to the “ON” (or "I")
position. This automatically
engages a safety lockout
mode.
The oven did not reach
200°F (93°C) within 15 min-
utesofstartup,andtheoven
has stopped heating.
•
Turnthe"HEAT"(or
(or )switches to the "OFF" (or "O") position.
),"BLOWER"(or ),and"CONVEYOR"
•
•
Wait for AT LEAST FIVE MINUTES before restarting the oven.
Repeat the Daily Startup procedure.
appears in display,
oven is not heating
Oven will not heat
Controls may be set incor-
rectly.
•
•
Check that the Set Point is correctly set.
Check that both the "BLOWER" (or
) and "HEAT" (or
)
Switches are in the “ON” (or "I") position.
•
Iftheovenstillwillnotheat,turnthe"HEAT"(or
),"BLOWER"
(or
),and"CONVEYOR"(or
)switchestothe"OFF"(or"O")
position.
•
•
Wait for AT LEAST FIVE MINUTES before restarting the oven.
Repeat the Daily Startup procedure. Check that the Set Point
is above 200°F (93°C).
Oven is operating, but
little or no air is blowing
from air fingers
Air fingers may have been
reassembled incorrectly
after cleaning.
•
•
Turn the oven off, and allow it to cool. Disconnect electrical
power to the oven.
Refer to Section 4, Maintenance, for instructions on reassem-
bling the air fingers.
Conveyor moves with a
jerky motion, or will not
move at all
Conveyor may be jammed
on an object in the oven, or
conveyor belt or drive chain
tension may be incorrect.
•
Turn the oven off, and allow it to cool. Disconnect electrical
power to the oven.
•
•
Check if the conveyor is blocked by an object inside the oven.
Refer to Section 4, Maintenance, for instructions on checking
the conveyor and drive chain tension.
Food products are
overcooked or
undercooked.
Controls may be set incor-
rectly.
•
Check that the set temperature and bake time settings are
correct.
IFTHESESTEPSFAILTORESOLVETHEPROBLEM, CONTACTYOURLOCALMIDDLEBYMARSHALL
AUTHORIZED SERVICE AGENT. A SERVICE AGENCY DIRECTORY IS SUPPLIED WITH YOUR OVEN.
19
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SECTION4-MAINTENANCE
WARNING
BeforeANYcleaningorservicingoftheoven, performthefollowingprocedure:
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
theoven.
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. Turnonthefull-flowgassafetyvalve. Testthegaslineconnectionsforleaksusingapprovedleaktestsubstances
or thick soap suds.
5. Turn on the electric supply circuit breaker(s).
6. Performthenormalstartupprocedure.
WARNING
Possibilityofinjuryfrommovingpartsandelectricalshockexistsinthisoven. Switchoffandlockout/tagouttheelectric
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
NEVERuseawaterhoseorpressurizedsteam-cleaningequipmentwhencleaningthisoven. DONOTuseexcessive
amountsofwater, toavoidsaturatingtheoveninsulation. DONOTuseacausticovencleaner, whichcandamagethe
aluminizedbakechambersurfaces.
NOTE
ANY replacement parts that require access to the interior of the oven may ONLY be replaced by a Middleby Marshall
AuthorizedServiceAgent.
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.
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SECTION4-MAINTENANCE
Figure4-1-CoolingFan/VentLocations:
All ovens except PS360EWB and PS360WB70
I. MAINTENANCE - DAILY
A. Check that the oven is cool and the power is disconnected,
as described in the warning on Page 20.
Vents in top rear
edge of upper
oven
B. Clean the outside of the oven with a soft cloth and mild
detergent.
C. Clean ALL of the cooling fan grills and vent openings with a
stiff nylon brush. Refer to Figures 4-1, 4-2, and 4-3 for the
locations of the grills and vents.
REAR
D. Check that ALL cooling fans are operating properly.
FRONT
CAUTION
If a cooling fan is not operating correctly, it must be replaced
IMMEDIATELY. Operating the oven without adequate cool-
ing can seriously damage the oven's internal components.
Vents in floor
of lower oven
2 rear fans,
upper and lower ovens
E. Clean the conveyor belts with a stiff nylon brush. This is
more easily accomplished by allowing the conveyor to run
whileyoustandattheexitendoftheconveyor. Then,brush
the crumbs off the conveyor as it moves.
Figure4-2-CoolingFan/VentLocations: PS360EWB
Vents in top rear
2 front fans,
upper and lower ovens
F. Remove and clean the crumb trays. Be sure to replace the
trays in the same positions from which they were re-
moved, because they are NOT identical. Refer to the
drawings on Page 10 in the Installation section.
Vents on each side of
rear panel, upper and
lower ovens
edge of upper
oven
G. OVENS EQUIPPED WITH WINDOWS ONLY: Clean the
window in place.
REAR
FRONT
Vents on each side
of floor panel of
lower oven
Figure 4-3 - Cooling Fan/Vent Locations: PS360WB70
2 front fans,
upper and
lower ovens
2 side vents,
upper and lower ovens
REAR
FRONT
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SECTION4-MAINTENANCE
II. MAINTENANCE - MONTHLY
NOTE
Figure 4-4 - Removing Air Fingers and Plates
Air Finger
When removing the conveyor, refer to the drawings on Pages 12-
13 in the Installation section.
Blank Plate
A. Check that the oven is cool and the power is disconnected,
as described in the warning on Page 20.
B. Remove the drive motor shroud and conveyor extension
covers from the oven. Disconnect the drive chain from the
sprocket on the drive shaft of the conveyor.
C. Slide the conveyor out of the oven.
NOTE
Split belt conveyors can only be removed from the end of the
oven with the drive motor.
Single-belt conveyor assemblies may be removed from
either end of the oven. If it is to be removed from the end of
the oven without the drive motor, the drive sprocket assem-
bly must be removed.
To remove the drive sprocket (if necessary), loosen the set
screw on the conveyor collar as shown in Figure 2-12 (on
Page 12). Then, pull the sprocket assembly straight out.
D. Remove the end plugs from the oven. The end plugs are
shown in Figure 1-1, on Page 4 of this Manual.
Figure 4-5 - Disassembling the Air Fingers
E. Slide the air fingers and blank plates out of the oven, as
shown in Figure 4-4. 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.
Manifold
Inner plate
Outer Plate
Example of markings:
(Top Row)
T1 T2 T3 T4 T5 T6
B1 B2 B3 B4 B5 B6
(Bottom Row)
F. Disassemble the air fingers as shown in Figure 4-5. AS
EACH FINGER IS DISASSEMBLED, WRITE THE "LOCA-
TION CODE" FOR THE FINGER ON ALL THREE OF ITS
PIECES. This will help you in correctly reassembling the air
fingers.
2
Pull outer plate
straight up
3
and off
Swing ends of inner plate and
CAUTION
manifold apart
Incorrect reassembly of the air fingers will change the
baking properties of the oven.
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 20 for cleaning
precautions.
H. Reassemble the air fingers. Then, replace them in the oven,
using the "location code" as a guide.
I.
Replace the end plugs on the oven.
J. Reassembletheconveyorintotheoven. Ifthedrivesprocket
was removed when installing the conveyor, replace it at this
time.
4
Pull inner plate
upwards, and
then away from
manifold
K. Reattach the drive chain.
L. Check the tension of the conveyor belt as shown in Figure
2-15 (on Page 12). The belt should lift between 3-4" (75-
100mm). DONOTOVERTIGHTENTHECONVEYORBELT.
If necessary, the belt tension can be adjusted by turning the
conveyor adjustment screws, located at the idler (right) end
of the conveyor.
1
M. Replace the drive motor shroud and the conveyor exten-
sions.
Step on lip of manifold
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SECTION4-MAINTENANCE
III. MAINTENANCE - EVERY 3 MONTHS
IV. MAINTENANCE - EVERY 6 MONTHS
A. Check that the oven is cool and the power is disconnected,
as described in the warning on Page 20.
A. Check that the oven is cool and the power is disconnected,
as described in the warning on Page 20.
B. Vacuum both of the blower motors, and their surrounding B. Check for excessive wear on the conveyor drive motor
compartments, using a shop vacuum.
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 assem-
bly.
D. For split belt ovens ONLY, disassemble, clean and lubricate
the conveyor shaft components as described below.
D. Check (and clean, if necessary) the oven venting system,
including the flue.
1. Remove the motor shroud, conveyor extensions, and
conveyor as described in Part II, Monthly Maintenance.
E. Check the conveyor drive shaft bushings and spacers.
Replace the components if they are worn.
2. Remove the master links from each conveyor belt.
Then, roll the belts up along the length of the conveyor
to remove them from the frame.
Figure 4-6 - Split Belt Idler Shaft
3. Remove the two conveyor adjustment screws from the
idler end of the conveyor frame, as shown in Figure 4-
6.
All ovens
Conveyor adjustment
screw (2)
Collar
4. For PS360EWB and PS360WB70 ovens, remove the
socket head screw as shown in the inset drawing.
Then, loosen the locking collar set screw. Push the
shaft assembly toward the locking collar until it is free.
PS360EWB and
PS360WB70 Only
PS360EWB
and
5. Remove the idler shaft assembly from the conveyor.
6. Pull apart the two sections of the idler shaft. Clean the
shafts thoroughly using a rag. Then, lubricate both the
extended shaft and the interior of the hollow shaft using
a light food-grade lubricant.
PS360WB70
Only
Screw
CAUTION
DO NOT lubricate the shafts using WD40 or a similar
product. This can cause the shafts to wear rapidly.
Figure 4-7 - Split Belt Drive Shaft
7. Beforereassemblingtheshaftsintotheconveyorframe,
check that they are oriented properly. Remember that
unequal-width split belt ovens should ALWAYS have
the narrower belt at the front of the oven.
8. Reassemble the idler shaft into the conveyor. For all
ovens except the PS360EWB and PS360WB70, make
sure that the bronze washer is in place between the two
sections of the shaft. See Figure 4-8.
Screw
All ovens
Locking collar
PS360EWB and
PS360WB70 Only
9. Loosen the set screw on both of the conveyor drive
sprockets. Then, remove the sprockets from the shaft.
10. Loosen the locking collar set screw, as shown in Figure
4-7. For PS360EWB and PS360WB70 ovens, remove
the socket head screw shown in the inset drawing.
11. Push the drive shaft to the right, then lift it free of the
conveyor frame. Then, disassemble and lubricate the
two sections of the drive shaft as described in Step 5.
Figure 4-8 - Washers and Spacer
12. Beforereassemblingtheshaftsintotheconveyorframe,
check that they are oriented properly. Remember that
unequal-width split belt ovens should ALWAYS have
the narrower belt at the front of the oven.
All ovens
Nylon spacer
on drive shaft
ONLY
13. Reassemble the drive shaft into the conveyor. Check
that the nylon spacer is in place, as shown in Figure 4-
8. Also, for all ovens except the PS360EWB and
PS360WB70, check that the bronze washer is in place
between the two sections of the shaft.
All ovens
except
14. Replace the drive sprockets. Reassemble the belts
and master links onto the conveyor, and replace the
conveyor in the oven.
PS360EWB and
PS360WB70
Bronze washer on
BOTH idler and
drive shafts
15. Reassemble the motor shroud and conveyor exten-
sions onto the oven.
23
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SECTION4-MAINTENANCE
V. KEY SPARE PARTS KIT - Available separately. See Figure 4-9.
A. Key Spare Parts Kit components (all ovens)
B. Additional Key Spare Parts Kit components for gas
ovens
Item
1
Description
PartNumber
36939
Item
9
Description
PartNumber
42810-0114
27170-0011
1
1
2
1
1
1
1
Kit,DigitalTemperatureController
Conveyor Drive Motor
1
1
Kit, IgnitionModule
2
27384-0008
22450-0052
42810-0133
27170-0263
33984
10a
BurnerBlower/MotorAssembly
3
Brushes, Conveyor Drive Motor
Kit,ConveyorSpeedController
ConveyorControlPickupAssembly
Thermocouple
(PS310,314,360,360Q,360S,360WB)
4
10b
11
1
1
1
1
1
BurnerBlower/MotorAssembly(PS360EWB,WB70)
SolenoidValve(AllovensEXCEPTPS360EWB)
ModulatingValve(PS360EWB)
38811
28091-0017
32570
5
6
12
7a
CoolingFan(PS310, 314, 360, 360Q,
360S,360WB)
27392-0002
13
Amplifier,ModulatingValve(PS360EWB)
AirSwitch(PS360EWB,WB70)
31651
14
32102
7b
8a
8b
8c
8d
8e
1
1
1
1
1
1
CoolingFan(PS360EWB,WB70)
36451
Blwr Mtr, 1 Ph, 1/3 HP (PS310, 314, 360, 360S)
Blower Motor, 3 Ph, 1/3 HP (PS310, 314, 360)
Blower Motor, 1 Ph, 1/4 HP (PS360Q)
27381-0023
27381-0024
27381-0054
27381-0075
31432
Blower Motor, 1 Ph, 1/2 HP (PS360WB)
Blower Motor, 1 Ph, 1 HP (PS360EWB, WB70)
Fig. 4-9 - Key Spare Parts Kit
1
2
3
4
5
6
8
7
9
10
11
12
13
14
IMPORTANT
An electrical wiring diagram for the oven is located inside the
machinery compartment or control compartment.
MiddlebyCookingSystemsGroup•1400ToastmasterDrive•Elgin,IL60120•USA•(847)741-3300•FAX(847)741-4406
24-Hour Service Hotline: 1-(800)-238-8444
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