Middleby Marshall PS314SBI User Manual

PS314SBI
Gas and Electric (AGA/UL)
ENGLISH/French/Spanish

P/N 42447

Rev. B  V1  2/00

page 1page 21página 41

ENGLISHFRANÇAISESPAÑOL

Model PS314SBI Gas and Electric
Ovens

Models:

 PS314SBI

Combinations:

 Single Lower Oven

OWNER'S OPERATING

& INSTALLATION

MANUAL

© 2000 Middleby Marshall, Inc.

is a registered trademark of Middleby Marshall, Inc. All rights reserved.

Middleby Cooking Systems Group  1400 Toastmaster Drive  Elgin, IL 60120  [phone]  FAX [phone]

1

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

be familiar with the functions and operation of the oven.
This manual must be kept in a prominent, easily reachable location near the oven.

ENGLISH

Gas ovens are designed for use with EITHER natural gas OR liquid propane gas, as specified on the serial plate.
Where permitted by local and national codes, the oven can be converted from natural gas to propane operation,
or from propane to natural gas operation. This conversion requires the installation of the appropriate Middleby
Marshall Gas Conversion Kit by an Authorized Service Agent.

It is suggested to obtain a service contract with a Middleby Marshall Authorized Service Agent.

WARNING

POST, IN A PROMINENT LOCATION, THE EMERGENCY TELEPHONE NUMBER OF YOUR LOCAL GAS

SUPPLIER AND INSTRUCTIONS TO BE FOLLOWED IN THE EVENT YOU SMELL GAS.

Instructions to be followed in the event the user smells gas shall be obtained by consulting the local gas

supplier. If the smell of gas is detected, immediately call the emergency phone number of your local Gas

Company. They will have personnel and provisions available to correct the problem.

FOR YOUR SAFETY

Do not store or use gasoline or other flammable vapors or liquids in the vicinity of

this or any other appliance.

WARNING:

Improper installation, adjustment, alteration, service or maintenance

can cause property damage, injury or death. Read the installation,

operating and maintenance instructions thoroughly before installing

or servicing this equipment.

IMPORTANT

An electrical wiring diagram for the oven is located inside the machinery

compartment.

IMPORTANT

It is the customer's responsibility to report any concealed or non-concealed damage

to the freight company. Retain all shipping materials until it is certain that the

equipment has not suffered concealed shipping damage.

NOTICE: CONTACT YOUR MIDDLEBY MARSHALL AUTHORIZED SERVICE AGENT TO PERFORM MAINTENANCE
AND REPAIRS. AN AUTHORIZED SERVICE AGENCY DIRECTORY IS SUPPLIED WITH YOUR OVEN.

NOTICE: Using any parts other than genuine Middleby Marshall factory manufactured parts relieves the manufacturer of
all warranty and liability.

NOTICE: Middleby Marshall (Manufacturer) reserves the right to change specifications at any time.

NOTICE: The equipment warranty is not valid unless the oven is installed, started and demonstrated under the supervision

of a factory certified installer.

Retain This Manual For Future Reference

Middleby Cooking Systems Group  1400 Toastmaster Drive  Elgin, IL 60120  USA  [phone]  FAX [phone]

24-Hour Service Hotline: [phone]

www.middleby.com

2

TABLE OF CONTENTS

page page

SECTION 1 - DESCRIPTION .................................................... 4

IV. THERMOCOUPLE INSTALLATION .......................... 8

I. OVEN USES ............................................................. 4

II. OVEN COMPONENTS ............................................. 4

A. Conveyor Drive Motor ........................................ 4

B. End Trays .......................................................... 4

C. Conveyor ........................................................... 4

D. End Plugs ......................................................... 4

E. Cool Rear Panels ............................................. 4

F. Cool Front Panel ............................................... 4

G. Machinery Compartment Access Panel ........... 4

H. Control Compartment Access Panel ............... 4

I. Control Panel .................................................... 4

J. Serial Plate ........................................................ 4

K. Crumb Pans ..................................................... 4

L. Gas Burner ........................................................ 4

M. Blowers ............................................................. 4

N. Air Fingers ......................................................... 4

III. OVEN SPECIFICATIONS ......................................... 4

V. CONVEYOR INSTALLATION .................................... 8

VI. FINAL ASSEMBLY ................................................... 1 0

VII. ELECTRICAL SUPPLY ........................................... 11

A. Electric Ovens ..................................................11

B. Gas Ovens .......................................................11

C. Ovens with External Transformers .................. 11

D. Connection.......................................................11

VIII. GAS SUPPLY .......................................................... 12

A. Connection ....................................................... 1 2

B. Gas Conversion ............................................... 12

SECTION 3 - OPERATION ...................................................... 1 3

I. LOCATION AND DESCRIPTION OF CONTROLS .. 13

A. BLOWER ( ) Switch ...................................... 13

B. HEAT ( ) Switch ............................................ 13

C. CONVEYOR ( ) Switch ............................... 13

D. Conveyor Speed Controller ............................. 13

ENGLISH

A. Dimensions ...................................................... 4

B. General Specifications ..................................... 4

C. Gas Orifice and Pressure Specifications ......... 4

D. Electrical Specifications - Gas Ovens .............. 4

E. Electrical Specifications - Electric Ovens ......... 5

SECTION 2 - INSTALLATION .................................................. 5

I. INSTALLATION KIT .................................................. 6

A. Components ..................................................... 6

B. Additional Components - Gas Ovens .............. 6

II. VENTILATION SYSTEM ............................................ 6

A. Requirements ................................................... 6

B. Recommendations ........................................... 6

C. Other Ventilation Concerns .............................. 7

III. ASSEMBLY ............................................................... 7

A. Legs/Casters Installation ................................. 7

B. Restraint Cable Installation .............................. 7

E. Digital Temperature Controller ........................ 13

F. Machinery Cpt. Access Panel Safety Switch .... 13

II. NORMAL OPERATION, STEP-BY-STEP ................. 1 4

A. Daily Startup Procedures ................................. 14

B. Daily Shutdown Procedures ............................ 14

III. QUICK REFERENCE: DIGITAL TEMP CONTROL . 15

IV. QUICK REFERENCE: TROUBLESHOOTING ........ 16

SECTION 4 - MAINTENANCE .. ............................................... 17

I. MAINTENANCE - DAILY .......................................... 1 8

II. MAINTENANCE - MONTHLY ................................... 1 8

III. MAINTENANCE - EVERY 3 MONTHS ..................... 1 9

IV. MAINTENANCE - EVERY 6 MONTHS ..................... 19

V. MAINTENANCE - EVERY 12 MONTHS ................... 19

V. KEY SPARE PARTS KIT .......................................... 2 0

A. Components .................................................... 2 0

B. Additional Components - Gas Ovens ............. 20

3

SECTION 1 - DESCRIPTION

I. OVEN USES

The PS314SBI oven is optimized to melt cheese for use on

ENGLISH

sandwiches and other food products.

II. OVEN COMPONENTS - see Figure 1-1.

A. Conveyor Drive Motor: Moves the conveyor.
B. End Trays: Catch the food product as it exits the conveyor.

End trays are available in single and double versions for the
PS314SBI oven.

C. Conveyor: Moves the food product through the oven.
D. End Plugs: Allow access to the oven's interior.
E,F.

Cool Front and Rear Panels: Reduce direct user contact

with the body of the oven.

G. Machinery Compartment Access Panel: Allows access

to the oven's interior components. No user-servicable
parts are located in the machinery compartment.

H. Control Compartment Access Panel: Allows access to

the control components. No user-servicable parts are
located in the control compartment.

I. Control Panel: Location of the operating controls for the

oven. Refer to Section 3, Operation, for details.

J. Serial Plate: Provides specifications for the oven that affect

installation and operation. Refer to Section 2, Installation.

Not Shown:

K. Crumb Pans: Catch crumbs and other material that drop

through the conveyor belt. One crumb pan is located
underneath each end of the conveyor.

L. Gas Burner: Gas ovens only. Heats air, which is then

projected to the air fingers by the blowers.

M. Blowers: Project hot air to the air fingers.
N. Air Fingers: Project streams of hot air onto the food product.

Fig. 1-1 - PS314SBI Oven Components

D

E

F

C

B

A

H,I

III. OVEN SPECIFICATIONS

A. Dimensions

Overall Height - inc. top and 9"/229mm legs 54" (1372mm)
Overall Depth - inc. front and rear shrouds

with single exit tray 38-1/2" (978mm)
with double exit trays 39-3/4" (1010mm)

Overall Length - inc. exit tray(s) 83-1/4" (2115mm)
Conveyor Width 24" (610mm)

Recommended Minimum Clearances

Rear of oven (inc. rear shrouds) to wall 1" (25mm)
Conveyor extension (right) or end tray(s) (left) to wall

B. General specifications

Weight 1080 lbs. (497kg)
Shipping Weight 1370 lbs. (630kg)
Shipping Carton Vol. 105 ft.3/2.98m

Rated Heat Input

Gas 135,000 BTU (34,020kcal,40kw/hr)
Electric 26kw/hr.

Max. Op. Temp. 550°F/288°C

Air Blowers

Air Jet Velocity (avg.) 2600 ft./min. (1320cm/sec.)
Warmup Time 15 minutes

2 blowers at 1550 ft.3 (43.9m3)/min. at 1700

RPM, 0.88" (2.2cm) water static pressure

0" (0mm)

3

G

J

C. Gas orifice and pressure specifications - for gas-fired

ovens

Main Pilot Bypass Supply (inlet) Manifold

orifice I.D. orifice I.D. orifice I.D. pressure pressure

Natural Gas

0.219 0.028 0.065/#53 drill 6-12" W.C. 3-1/2" W.C.

5.56mm 0.71mm 1.65mm 14.9-29.9mbar 8.7mbar

Propane

0.134" 0.018" 0.034"/#62 drill 11-14" W.C. 10" W.C.

3.40mm 0.46mm 0.86mm 27.4-34.9mbar 24.9mbar

D. Electrical specifications - for gas-fired ovens

Main Blower Control Circuit Current

Voltage Voltage Phase Freq. Draw Poles Wires

208-240V 120V 1 P h 60Hz 10A 3 Pole 4 Wire (2 hot,

208-240V 120V 1 P h 50/60Hz 10A 2 Pole 3 Wire

(export) (transformer) (2 hot, 1 gnd)

200-220V 120V 1 P h 50/60Hz 10A 2 Pole 3 Wire

(export) (transformer) (2 hot, 1 gnd)

1 neut, 1 gnd)

4

SECTION 1 - DESCRIPTION

E. Electrical specifications - for electrically-heated ovens

Main Blower Control Current kW

Voltage Circuit Voltage Phase Freq. Draw Rating Poles Wires

208-240V 120V 3 P h 60 Hz 67.3A at 208V 26.0 kW at 208V 4 Pole 5 Wire (3 hot, 1 neut, 1 gnd)

(with 3 Ph blower motors) 58.4A at 240V 26.0 kW at 240V

208-240V 120V 3 P h 60 Hz 67.3A at 208V 26.0 kW at 208V 4 Pole 5 Wire (3 hot, 1 neut, 1 gnd)

(with 1 Ph blower motors) 58.4A at 240V 26.0 kW at 240V

200-220V (export) 120V (transfomer) 3 P h 50/60 Hz 67.3A at 208V 24.3 kW at 208V 3 Pole 4 Wire (3 hot, 1 gnd)

240V (export) 120V (transformer) 3 Ph 50/60 Hz 58.4A 26.0 kW 3 Pole 4 Wire (3 hot, 1 gnd)
380V (export) 120V (transformer) 3 Ph 50/60 Hz 36.8A 24.3 kW 3 Pole 4 Wire (3 hot, 1 gnd)

400-416V (export) 120V (transfomer) 3 P h 50/60 Hz 33.8A 24.3 kW 3 Pole 4 Wire (3 hot, 1 gnd)

480V 120V (transformer) 3 Ph 60 Hz 29.2A 26.0 kW 3 Pole 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.

53.5A at 220V 20.4 kW at 220V

SECTION 2 - INSTALLATION

WARNING

Keep the appliance area free and clear of combustibles.

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.

ENGLISH

CAUTION

For additional installation information, refer to the following documents:

PS360 Pre-Installation Procedures Manual (Middleby Marshall P/N 88210-0024)

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.

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 guide-

lines 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 require-

ments of the appropriate statutory authority.

5

SECTION 2 - INSTALLATION

I. INSTALLATION KIT

1

ENGLISH

Fig. 2-1 - Installation Kit

14

18

7

15

19

8

2

4

9

10

6

3

5

16 17

A.Installation kit components

Item Description Part Number Qty.

1 Legs, adjustable 22450-0028 4
2 Caster (Rear), Swivel 22290-0010 2
3 Caster (Front), Swivel, with brake 22290-0009 2
4 Screw, hex, 3/8-16 x 1" 220373 16
5 Lockwasher, 3/8" 21422-0001 16
6 Flat washer, 3/8" 21416-0001 16
7 Leg, 9" (229mm) 34684 4
8 Screw, hex, 3/4-10 x 2" 21321-0016 7

9 Lockwasher, 3/4" 21421-0003 8
10 Flat washer, 3/4" 21411-0019 8
11 Shoulder eyebolt, 3/4"-10 x 2" 42440 1
12 Restraint Cable Assembly 22450-0228 1

11

13

20

21

12

Item Description Part Number Qty.

13 Thermocouple 33812-1 1
14 Cable Clamp 27276-0001 1
15 Screw, #10-32 x 3/8" 21256-0008 1
16 Model PS314SBI Owner's Operating 42447 1

and Installation Manual

17 Authorized Service Agency Listing 1002040 1

B. Additional installation kit components for gas ovens

18 Gas hose, flexible 22361-0001 1
19 Flue vent, 14" (356mm) 30773 1
20 Screw, hex, #2PT 10-16 x 3/4" HWH 21292-0001 2
21 Screw, #10-32 x 3/8" 21256-0008 1

II. VENTILATION SYSTEM

IMPORTANT

Where national or local codes require the installation of fire
suppression equipment or other supplementary equipment,
DO NOT mount the equipment directly to the oven.

MOUNTING SUCH EQUIPMENT ON THE OVEN MAY:
 VOID AGENCY CERTIFICATIONS

 RESTRICT SERVICE ACCESS
 LEAD TO INCREASED SERVICE EXPENSES FOR THE

OWNER

A. Requirements

CAUTION

 A mechanically driven ventilation system is RE-

QUIRED for gas oven installations.

 A mechanically driven ventilation system is

STRONGLY RECOMMENDED for electric oven
installations.

PROPER VENTILATION OF THE OVEN IS THE RE­SPONSIBILITY OF THE OWNER.

B. Recommendations

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.

18"

458mm

ANY APPLICABLE LOCAL AND NATIONAL CODES SUPER­SEDE THE RECOMMENDATIONS SHOWN IN THIS MANUAL.

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.

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 heat­related problems to the oven components as if there were no

Fig. 2-2 - Ventilation System

2"/51mm minimum

6

18"

458mm

12"

305mm

3"

76mm

ventilation at all. The best method of supplying return air is
through the heating, ventilation and air conditioning (HVAC)
system. Through the HVAC system, the air can be temperature­controlled 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.

NOTE: Return air from the mechanically driven system

must not
blow at the opening of the baking chamber. Poor oven baking
performance will result.

Fig. 2-3 - Leg Extensions

Rear of oven

SECTION 2 - INSTALLATION

Drive end

(left side of

oven)

C. Other ventilation concerns

 Special locations, conditions, or problems may require the

services of a ventilation engineer or specialist.
 Inadequate ventilation can inhibit oven performance.
 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.

III. ASSEMBLY

A. Legs/Casters Installation

1. Move the oven to its final location using the casters that are

pre-attached to the bottom panel.

2. Elevate the oven until its bottom surface is at least 18"

(457mm) above the floor.

3. Remove the casters from the bottom of the oven. These

casters are attached for pre-installation movement ONLY,

and may not be left on the oven.

4. Attach one of the 9" (229mm) leg extensions to the REAR

DRIVE-END (rear left) corner of the oven, as shown in

Figure 2-3. On the OUTSIDE hole of the leg extension, use

one 3/4"-10 hex screw, one 3/4" lockwasher, and one 3/4"

flat washer. On the INSIDE hole of the leg extension, use

the 3/4"-10 shoulder eyebolt (supplied in the Installation

Kit) in place of the screw.

5. Attach the 3 remaining leg extensions using the remaining

screws, lockwashers, and flat washers.

6. Attach EITHER the 6" (152mm) adjustable legs OR the

casters to the bottom of the 9" leg extensions, as follows:

 THE 6" (152mm) ADJUSTABLE LEGS may only be

used if there is at least 24" (610mm) service access
on ALL FOUR sides of the oven. To attach the adjustable
legs, screw the threaded stud into the center hole of the
leg extension. See Figure 2-4.

 CASTERS may be used in all installations. To attach

the casters, use the 3/8"-16 hex screws, 3/8"
lockwashers, and 3/8" flat washers supplied in the
Installation Kit. See Figure 2-4. The two locking
casters should be installed at the front of the oven.

7. Lower the oven to the floor.

 If the 6" (152mm) legs were used in the installation,

adjust the "foot" section of each leg to level the oven.

 If the casters were used in the installation, lock the front

casters in place.

washer

Lock

washer

screw

Flat

washer

Lock

washer

Eyebolt (this
leg extension
only)

Fig. 2-4 - Adjustable Legs and Casters

Flat

Hex

Caster without

brake - rear legs

OR OR

Caster with brake -

front legs

Fig. 2-5 - Installing the Restraint Cable

3/4 (19mm)

eyebolt

Hex

screw

ENGLISH

Adjustable

leg

B. Restraint Cable Installation

Because the oven is equipped with casters, a restraint cable
assembly must be installed to limit the movement of the
appliance without depending on the connector and the quick
disconnect device or its associated piping. Anchor one end of
the cable to the eyebolt on the left rear leg extension. Anchor the
opposite end to the wall as shown in Figure 2-5, using the
eyebolt supplied with the restraint cable assembly.

Eyebolt on

Restraint cable

Wall of

structure

7

assembly

left rear leg

extension

SECTION 2 - INSTALLATION

IV. THERMOCOUPLE INSTALLATION

1. Install the thermocouple sensing bulb into the hole in the
rear of the oven, as shown in Figure 2-6. Fasten the
thermocouple in place using the #10-32 x 3/8" screw

ENGLISH

supplied in the Installation Kit.

2. Thread the thermocouple lead(s) through the grommet
and into the machinery compartment, as shown in Figure
2-6.

Figure 2-6 - Thermocouple Installation Location

Thermocouple

3. Remove the right-side access panel of the machinery
compartment.

4. Thread the thermocouple lead(s) through the side of the
machinery compartment as shown in Figure 2-7, and into
the electrical box (at the right-front of the machinery com­partment).

5. Connect the thermocouple leads to the temperature con­troller as shown in Figure 2-8.

V. CONVEYOR INSTALLATION

NOTE

The conveyor assembly MUST be inserted from the drive end
of the oven.

1. Lift the conveyor and position it in the oven as shown in
Figure 2-9.

2. Continue moving the conveyor into the oven until the lip on
the bottom edge of the frame butts firmly against the end
plug.

Grommet-

protected hole

Figure 2-7 - Placing the Thermocouple Leads

Figure 2-8 - Thermocouple Lead Connections

8=White=Positive
7=Red=Negative
R=No Connection
Ground=Shielded cable

Figure 2-9 - Conveyor Installation

1 2 3

Unfold

conveyor

Slide into drive

end of oven

Lip on bottom

edge of frame fits

against end plug

8

3. Install the drive chain between the conveyor drive sprocket
and the motor sprocket as shown in Figure 2-10. Then,
check the tension of the drive chain. The chain should have
a 1/2" (13mm) deflection.

If necessary, the motor can be repositioned to allow the
chain to be installed, or to correct the tension of the chain
after it is in place. To reposition the motor:

 Loosen the two hex head screws that fasten the

conveyor motor's mounting bracket to the oven. The
screws are shown in Figure 2-10.

 Raise or lower the motor slightly, as required. Tighten

the two hex screws, and check the chain tension.

 Repeat these steps as necessary until the drive chain

has the correct 1/2" (13mm) deflection.

4. Check the tension of the conveyor belt at the IDLER (right)
end of the conveyor, by lifting the center of the belt straight
up with your fingers as shown in Figure 2-11. The belt
should lift between 2-3" (50-75mm). DO NOT OVER­TIGHTEN THE CONVEYOR BELT.

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 2-11.

SECTION 2 - INSTALLATION

Figure 2-10 - Drive Motor and Drive Chain

Drive chain

Motor

Loosen hex screws and

slide motor up or down to

adjust belt tension

Figure 2-11 - Conveyor belt tension

Lift belt straight

up as shown

ENGLISH

5. Check for freedom 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.

6. If necessary, links can be added to or removed from the
conveyor belt to achieve the correct deflection of 2-3" (50­75mm). If links must be removed from the belt, it can be
reattached to the conveyor as follows:

a. The conveyor belt links must be oriented as shown in

Figure 2-12.
b. The smooth side of the conveyor belt must face UP.
c. Connect the inside master links. Check that the links

are oriented as shown in Figure 2-12.
d. 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 2-12.
e. Return to Step 4, above, to re-check the belt tension.

Belt deflection
should be 2-3

(50-75mm)

Adjust tension by

turning screws (2)

Figure 2-12 - Master link orientation

Direction of

travel

Correct outside

master link

orientation

CORRECT inside master

link orientation

9

INCORRECT inside master

link orientation

SECTION 2 - INSTALLATION

VI. FINAL ASSEMBLY

1. For gas ovens, attach the flue vent to the rear wall of the oven
as shown in Figure 2-13. Use one #10-16 x 3/8" screw and
two #10-32 x 3/4" screws. All three screws are provided in

ENGLISH

the Installation Kit.

2. Install the motor housing, and secure it in place with its five
mounting screws. Two screws are located on the back wall
of the oven, while three are located on the hanger bracket
on the left end panel. See Figure 2-13.

3. Install the conveyor extension covers over the ends of the
conveyor frame. See Figure 2-13.

4. Check that the cool panels are properly mounted, as shown
in Figures 2-13 and 2-14. Slots on the back of the panels
fit over the hangers on the walls of the oven. One cool panel
is attached to the front of the oven, while two are attached
to the rear.

5. Attach the exit tray(s) at the drive (left) end of the conveyor.
See Figure 2-15.

6. Install the crumb trays underneath the conveyor as shown
in Figure 2-15. 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.

2 rear

screws

Extension cover

(drive end)

3 upper

screws

Rear cool

panels

Motor

shroud

2 rear

#10-16 x 3/4"

screws

1 bottom

#10-32 x 3/8"

screw

Figure 2-13 - Final Assembly - Front

Figure 2-14 - Final Assembly - Rear

Flue vent

(gas ovens

only)

Extension cover

(idler end)

Front cool

panel

Hangers on oven

wall fit into slots on

cool panels

Exit tray(s)

Drive-end rear

panel notched for

motor shroud

Figure 2-15 - Final Assembly - Exit Tray(s) and Crumb Trays

Conveyor extension Conveyor frame

Crumb tray

10

VII. ELECTRICAL SUPPLY (all ovens)

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.

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.

NOTE: The electric supply connection must meet all national
and local electrical code requirements.

NOTE: It may be necessary to temporarily remove the rear cool
panels to connect the electrical supply.

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 2-16.

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.

The supply conductors must be of the size and material (cop­per) recommended. Refer to the wiring diagram inside the
machinery compartment or control compartment of the oven.
Electrical specifications are also listed on the oven's serial
plate (Figure 2-16) and in the
(on Pages 4-5).

The oven requires a ground connection to the oven ground
screw located in the electrical junction box. (The box is shown
in Figure 2-17.) If necessary, have the electrician supply the
ground wire. Do NOT use the wiring conduit or other piping for

ground connections!

Figure 2-16 - Oven Serial Plate

Electrical Specifications tables

SECTION 2 - INSTALLATION

CAUTION

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.

CAUTION

DO NOT CONNECT BLACK WIRE TO HIGH LEG.

VOLTAGE OF THE BLACK AND WHITE WIRES MUST

BE NO HIGHER THAN 130 VAC.

A. Additional Information - Electric Ovens

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. See Figure 2-17. 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.

B. Additional Information - Gas Ovens

All gas oven electric supply connections are made via the
electrical junction box on the rear of the oven, shown in
Figure 2-17. 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.

C. Additional Information - Ovens with External Transform-

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.

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.

ENGLISH

3/4" (19mm)

pipe for

gas utility

connection

Serial plate location

Figure 2-17 - Utility Connection Locations

Gas oven Electric oven

Electrical

junction box

1-1/4" (32mm) conduit for

electric utility connection

11

Rear cool

panel

Rear wall

of oven

Appliance

Connection/Male

Nipple

Figure 2-18 -

Flexible Gas Hose

Installation

To Gas

Supply Pipe

90°

Elbow

Flexible

Gas Hose

Full-Flow Gas

Shutoff Valve

SECTION 2 - INSTALLATION

VIII. GAS SUPPLY (gas ovens only)

CAUTION

DURING PRESSURE TESTING NOTE ONE OF THE FOLLOW-

ENGLISH

ING:

1. The oven and its individual shutoff valve must be
disconnected from the gas supply piping system during
any pressure testing of that system at test pressure in
excess of 1/2 psi (3.45 kPa).

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 gas supply piping
system at test pressure equal to or less than 1/2 psi (3.45
kPa).

3. If incoming pressure is over 14 W.C. (35mbar), a
separate regulator MUST be installed in the line BEFORE
the individual shutoff valve for the oven.

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.

A. Connection

NOTE: It may be necessary to temporarily remove the rear cool
panels to connect the gas supply.

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 2-16) and in the Gas Orifice and
Pressure Specifications table (Page 4 of this manual).

Check the serial plate to determine the type of gas (Propane or
Natural) to be used with the oven.

Refer to the instructions in the gas hose package (included in
the Installation Kit) before connecting the gas line. One gas line
connection method is shown in Figure 2-18; 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
2-19.

One 90° elbow equals a 7 (2.13m) length of pipe. The
recommended pipe sizes are larger than usually required to
eliminate any operation problems. It is much less expensive
to make the initial installment large enough to do the job rather
than redoing the job later.

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 appropriate statutory
authority.

CANADIAN:
CAN/CGA-B 149.1 Natural Gas Installation Code
CAN/CGA-B 149.2 Propane Installation Code

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 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, Quick­Disconnect Devices for Use With Gas Fuel, CAN1-6.9 (in
Canada).

B. Gas Conversion

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.

WARNING

All installations, conversions and service work must be

performed by an authorized service agent.

Inlet pressure tap

(where incoming

gas pressure is

measured)

On/Off Knob

Always leave in

ON position

Figure 2-19 - Gas Burner and Piping Assembly

Manifold pressure tap

(where manifold gas

pressure is measured)

High Flame

Solenoid Valve

Combination Gas

Control Valve

(Safety Regulator)

Manual

shutoff valve

12

Burner Blower

Gas Burner

Pilot pressure tap

(where pilot gas

pressure is measured)

Low Flame

Bypass Line

SECTION 3 - OPERATION

I. LOCATION AND DESCRIPTION OF CONTROLS

Fig. 3-1 - Control Panel

D.

Conveyor Speed

(or "

")

controller

ENGLISH

A.

"BLOWER"

")

(or "

switch

A.

"BLOWER" Switch: Turns the blowers and

"HEAT"

(or "

switch

B.

")

cooling fans on and off. The HEAT Switch has no

C.

"CONVEYOR"

(or "

switch

D.

")

Conveyor Speed Controller: Adjusts and dis­plays the bake time.

E.

Digital Temperature

(or "

")

controller

effect unless the BLOWER Switch is in the ON
position.

B.

"HEAT" Switch: Allows the gas burner to light.

Activation of the gas burner is determined by the
settings on the Digital Temperature Controller.

E.

Digital Temperature Controller: Continuously

monitors the oven temperature. Settings on the
Digital Temperture Controller control the activa­tion of the gas burner.

C.

"CONVEYOR" Switch: Turns the conveyor drive

motor on and off.

NOT SHOWN:

F. Machinery Compartment Access Panel Safety Switch:

Disconnects electrical power to the controls and the blow­ers when the machinery compartment access panel is
opened. The panel should only be opened by authorized
service personnel.

13

SECTION 3 - OPERATION

II. NORMAL OPERATION - STEP-BY-STEP

IMPORTANT

Bake time and temperature settings for the oven are preset

ENGLISH

at the factory to customer-approved settings. These set­tings should not be changed during normal operation.

A. DAILY STARTUP PROCEDURE

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.

2. Turn the "BLOWER" (or

) switch to the ON (or

"I") position.

3. Turn the "CONVEYOR"
(or
ON (or "I") position.

4. If necessary, adjust the
conveyor speed setting
by turning the three
thumbwheels to change
the displayed bake time.

5. Adjust the temperature controller to a desired set tempera­ture, if necessary.

 Press the Set Point

○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○

 Press the Up Arrow

6. Turn the "HEAT" (or
switch to the "ON" (or "I")
position, and wait for the
"HEAT ON" light to turn
on.

) switch to the

and Unlock keys at
the same time. Wait
for the "SET PT" light
to turn on.

and Down Arrow
Keys as necessary
to adjust the set­point.

+

or

)

or

or

mins secs

thumbwheels

or

wait

for

wait

for

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 (

the Actual Temperature
in the display, and wait
for the "ACTUAL TEMP"
light to turn on. This al­lows you to monitor the
oven temperature as it
rises to the setpoint.

9. Allow the oven to preheat for 10 minutes after it has reached
the set point temperature.

B. DAILY SHUTDOWN PROCEDURE

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).

) key to show

wait

for

)

+

- - - - - or - - - - -

+

2. Make certain that there
are no products left on
the conveyor inside the
oven. Turn the "CON­VEYOR" (or
to the "OFF" (or "O") posi­tion.

3. If the oven is equipped with a window, open the window to
allow the oven to cool faster.

4. After the oven has cooled and the blowers have turned off,
switch the circuit breaker/fused disconnect to the off posi­tion.

) switch

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" (
(

) switches to the "OFF" ("O") position. Wait for AT
LEAST FIVE MINUTES before restarting the oven. Then,
repeat the Daily Startup procedure.

), "BLOWER" ( ), and "CONVEYOR"

CAUTION

In case of power failure, turn all switches to the 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.

or

14

III. QUICK REFERENCE: DIGITAL TEMPERATURE CONTROLLER

SECTION 3 - OPERATION

"SP LOCK" Light

Lights when the set
point is locked out
from changes. This
setting can only be
changed by service
personnel.

OVERTEMP Light

Lights when the oven
temperature is greater
than 650°F (343°C).
Refer to
ence: Troubleshoot­ing in this section.

Temperature Key

Press this key once to
view the Actual Tem­perature in the Dis­play.

Quick Refer-

Display

Shows the Set Point or
the Actual Tempera­ture in degrees Fahr­enheit (F) or Celsius
(C).

"HEAT ON" Light

Lights when the
burner is in operation.
Note that on all ovens
EXCEPT the
PS360EWB, this light
cycles on and off dur­ing normal operation.

ENGLISH

"SET PT" (setpoint)
Light

Lights when the set
point is shown in the
display.

"ACTUAL TEMP"
Light

Lights when the
Actual Tempera­ture is shown in
the display.

Service Key

For use by ser­vice personnel
only.

Unlock Key

Press this key together
with the Set Point 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
Key and Unlock Key in this
section.

Set Point

15

Set Point Key

Press this key together
with the Unlock Key to
allow the Set Point to
be changed.
Changes can only be
made for 60 seconds.

SECTION 3 - OPERATION

V. QUICK REFERENCE: TROUBLESHOOTING

SYMPTOM PROBLEM SOLUTION

ENGLISH

light is lit, food product is

undercooked

Oven will not

turn on at all

Oven shuts down shortly

after it is turned on

appears in display,
oven is not heating

The oven temperature ex­ceeded 650°F (343°C), and
the burner was automati­cally shut down.

Electrical power may not be
reaching the oven, or the
controls may be set incor­rectly.

The gas burner did not light
within 90 seconds of turn­ing the "HEAT" (or
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 min­utes of startup, and the oven
has stopped heating.

 Follow the procedures under Daily Shutdown Procedures in

this section to shut down the oven. Contact your Middleby
Marshall Authorized Service Agent to determine and correct the
cause of the condition to prevent damage to the oven.

 Check that the circuit breaker/fused disconnect is turned on.
 Check that the "BLOWER"

position. The burner cannot engage until the blowers are in
operation.

 Turn the "HEAT" (or

(or )switches to the "OFF" (or "O") position.

)

 Wait for AT LEAST FIVE MINUTES before restarting the oven.
 Repeat the Daily Startup procedure.

 Turn the "HEAT" (or

(or )switches to the "OFF" (or "O") position.
 Wait for AT LEAST FIVE MINUTES before restarting the oven.
 Repeat the Daily Startup procedure.

(or ) Switch is in the ON (or "I")

), "BLOWER" (or ), and "CONVEYOR"

), "BLOWER" (or ), and "CONVEYOR"

Oven will not heat

Oven is operating, but

little or no air is blowing

from air fingers

Conveyor moves with a

jerky motion, or will not

move at all

Food products are

overcooked or

undercooked.

Controls may be set incor­rectly.

Air fingers may have been
reassembled incorrectly
after cleaning.

Conveyor may be jammed
on an object in the oven, or
conveyor belt or drive chain
tension may be incorrect.

Controls may be set incor­rectly.

 Check that the Set Point is correctly set.
 Check that both the "BLOWER" ( ) and "HEAT" ( ) Switches

are in the ON ("I") position.
 If the oven still will not heat,turn the "HEAT" ( ), "BLOWER"

( ), and "CONVEYOR" ( )switches to the "OFF" ("O")

position.
 Wait for AT LEAST FIVE MINUTES before restarting the oven.
 Repeat the Daily Startup procedure. Check that the Set Point

is above 200°F (93°C).

 Turn the oven off, and allow it to cool. Disconnect electrical

power to the oven.
 Refer to Section 4,

bling the air fingers.

 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,

the conveyor and drive chain tension.

 Check that the set temperature and bake time settings are

correct.

Maintenance, for instructions on reassem-

Maintenance, for instructions on checking

IF THESE STEPS FAIL TO RESOLVE THE PROBLEM, CONTACT YOUR LOCAL MIDDLEBY MARSHALL
AUTHORIZED SERVICE AGENT. A SERVICE AGENCY DIRECTORY IS SUPPLIED WITH YOUR OVEN.

16

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. For ovens with legs, adjust the legs so
that they are seated properly on the floor. For ovens with casters, lock the front casters.

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.

ENGLISH

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, 6-Month, and 12-Month Maintenance procedures in this section be
performed ONLY by a Middleby Marshall Authorized Service Agent.

17

SECTION 4 - MAINTENANCE

I. MAINTENANCE - DAILY

1. Check that the oven is cool and the power is disconnected,
as described in the warning on Page 17.

2. Clean the outside of the oven with a soft cloth and mild

ENGLISH

detergent.

3. Temporarily remove the rear cool panels.

4. Clean ALL of the cooling fan grills and vent openings with
a stiff nylon brush. Refer to Figure 4-1 for the locations of
the grills and vents.

5. 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.

Figure 4-1 - Cooling Fan/Vent Locations

FRONT

Vents in floor

of oven

6. Replace the rear cool panels.

7. Clean the conveyor belt 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.

8. Remove and clean the crumb trays. Be sure to replace
the trays in the same positions from which they were
removed, because they are NOT identical.

II. MAINTENANCE - MONTHLY

NOTE: When removing the conveyor, refer to the drawings on
Pages 8-9 in the Installation section.

1. Check that the oven is cool and the power is disconnected,
as described in the warning on Page 17.

2. Remove the drive motor shroud and conveyor extension
covers from the oven.

3. Disconnect the drive chain from the sprocket on the drive
shaft of the conveyor. If two people are available, one
person should lift the idler (right) end of the conveyor as the
second person presses down on the drive (left) end. This
will create enough slack in the chain to remove it.

If this procedure will not free the chain, or if only one person
is available, perform the following steps:

 Loosen the two hex head screws that fasten the

conveyor motor's mounting bracket to the oven. See

Figure 2-10 (on Page 9).
 Raise the motor to free the chain from the sprocket.
 Disconnect the drive chain.

4. Slide the conveyor out of the oven.

NOTE: The conveyor can only be removed from the end of
the oven with the drive motor (left end).

5. Remove the end plugs from the oven. The end plugs are
shown in Figure 1-1, on Page 4 of this Manual.

6. Slide the air fingers and blank plates out of the oven, as
shown in Figure 4-2. 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

Rear cool panels

removed

REAR

2 rear fans

2 fan grilles in

rear cool panels

Figure 4-2 - Removing Air Fingers and Plates

Blank PlateAir Finger

18