Middleby Marshall PS360WB-U, PS360-L User Manual

PS300 Series Gas and Electric (Europe) ENGLISH/Danish

P/N 46486

Rev. B  V1  7/01

page 1

ENGLISH

side 25

DANSK

PS300 Series Gas and Electric Ovens

Models:

 PS360-U, PS360-L Gas  PS360-U, PS360-L Electric  PS360WB-U, PS360WB-L Gas

OWNER'S OPERATING AND INSTALLATION MANUAL

for European export ovens

Single Oven Double Oven

PS360 PS360WB PS360 PS360WB

Rated Heat Input 40kW 50kW 2x40kW 2x50kW Gas Ovens

Rated Heat Input 26kW -- 2x26kW -- Electric Ovens

Heating Zones 1 controlled heat zone 2 controlled heat zones

Combinations:

 Single Oven  Double Oven (Two-Stack)

Middleby Cooking Systems Group  1400 Toastmaster Drive  Elgin, IL 60120  USA  (847)741-3300  FAX (847)741-4406

NOTICE:

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

This 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 is described in the Installation section of this Manual. The conversion requires the installation of the appropriate Middleby Marshall Gas Conversion Kit.

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  (847)741-3300  FAX (847)741-4406

24-Hour Service Hotline: 1-(800)-238-8444

www.middleby.com

TABLE OF CONTENTS

page page

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

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

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

II. OVEN COMPONENTS ............................................. 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 or Heating Elements .................... 4

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

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

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

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

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

C. Electrical Specifications ................................... 5

D. Gas Orifice and Pressure Specifications........ 5

A. Additional Information - Gas Ovens ................ 11

B. Additional Information - Electric Ovens .......... 11

C. Connection ...................................................... 11

VIII. GAS SUPPLY .......................................................... 11

A. Gas Utility Rough-in Recommendations ....... 12

B. Connection ...................................................... 12

C. Preparation for Use with Various Gases ....... 13

D. Replacing the Gas Orifices .............................13

E. Checking the Gas Supply (Inlet) Pressure .... 14

F. Adjusting the Orifice (Manifold) Pressure

and Heat Input ................................................. 14

SECTION 3 - OPERATION ..................................................... 15

I. LOCATION AND DESCRIPTION OF CONTROLS . 15

A. "BLOWER" (

B. "HEAT" (

C. "CONVEYOR" (

D. "RESET" (

E. Conveyor Speed Controller .............................15

F. Digital Temperature Controller....................... 15

G. Machinery Cpt. Access Panel Safety Switch .. 15

II. NORMAL OPERATION, STEP-BY-STEP ................ 16

) Switch ................................... 15

) Switch ......................................... 15

) Switch .............................15

) Switch ....................................... 15

ENGLISH

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

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

II. VENTILATION SYSTEM ........................................... 7

A. Requirements .................................................. 7

B. Recommendations .......................................... 7

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

III. ASSEMBLY ............................................................... 8

A. Caster Removal ............................................... 8

B. Stacking ............................................................ 8

C. Stands ............................................................... 8

D. Flue Vent(s) ...................................................... 8

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

V. CONVEYOR INSTALLATION ................................... 9

VI. FINAL ASSEMBLY ................................................... 10

A. Daily Startup Procedures ................................ 16

B. Daily Shutdown Procedures ...........................16

III. QUICK REFERENCE: DIGITAL TEMP CONTROL. 17

IV. QUICK REFERENCE: TROUBLESHOOTING ....... 18

SECTION 4 - MAINTENANCE ................................................. 19

I. MAINTENANCE - DAILY ..........................................19

II. MAINTENANCE - MONTHLY .................................. 20

III. MAINTENANCE - EVERY 3 MONTHS .................... 21

IV. MAINTENANCE - EVERY 6 MONTHS .................... 22

V. KEY SPARE PARTS KIT ......................................... 22

SECTION 5 - ELECTRICAL WIRING DIAGRAMS ...................23

I. WIRING DIAGRAM, PS360-U/-L ELECTRIC OVEN,

380-400V, 50Hz, 1Ph .............................................. 23

II. WIRING DIAGRAM, PS360-U/-L OR PS360WB-U/-L

GAS OVEN, 220-230V, 50Hz, 1 Ph......................... 24

SECTION 1 - DESCRIPTION

I. OVEN USES

PS300 Series Ovens can be used to bake and/or cook a

ENGLISH

wide variety of food products, such as pizza, pizza-type products, cookies, sandwiches and others.

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.

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

installation and operation.

F. Window: 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. 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.

Not Shown:

J. Eyebrows (on ovens so equipped): Can be adjusted to

various heights to prevent heat loss into the environment.

K. Conveyor End Stop: Prevents food products from falling off

the end of the moving conveyor.

L. Gas Burner (gas ovens) or Heating Elements (electric

ovens): Heats air, which is then projected to the air fingers

by the blowers.

M. Blowers: Fans that project hot air from the burner to the air

fingers.

N. Air Fingers: Project streams of hot air onto the food product.

Figure 1-1 - Oven Components

D F

H,I

III. OVEN SPECIFICATIONS

Table 1-1: Dimensions PS360U, PS360L PS360WB-U, PS360WB-L

Overall Height

Lower oven, with top and legs 1143mm 1143mm Upper oven, with stand and top 1638mm 1638mm Double oven (two-stack) 2089mm 2089mm

Overall Depth (including rear shrouds and front window) 1194mm 1397mm Overall Length 2299mm 2299mm Conveyor Width, Single Belt Ovens 813mm 1016mm Conveyor Width, Split Belt Ovens 2 x 381mm 2 x 483mm Recommended Minimum Clearances

Rear of oven (inc. rear shrouds) to wall 25mm 25mm Conveyor extension to wall (both ends) 0mm 0mm

Table 1-2: General specifications (per oven cavity)

PS360U, PS360L Gas PS360-U, PS360-L Electric PS360WB-U, PS360WB-L Gas Weight 583kg 583kg 674kg Shipping Weight 617kg 617kg 708kg Shipping Carton Vol. 3.00m Rated Heat Input 34,020kcal, 40kW 26kW 42,840kcal, 50kW Max. Operating Temp. < - - - - - - - - - - - - - - - - - - 288°C - - - - - - - - - - - - - - - - - - > Air Blowers < - - - - - - - 2 blowers at 43.9m

Air Jet Velocity (avg.) < - - - - - - - - - - - - - - - 1320cm/sec. - - - - - - - - - - - - - - - > Warmup Time < - - - - - - - - - - - - - - - - 15 minutes - - - - - - - - - - - - - - - - >

2.2cm water static pressure

3.00m

/min. at 1700 RPM, - - - - - - - >

3.65m

Table 1-3: Electrical specifications (per oven cavity)

Oven Model Voltage Circuit Voltage Phase Freq. Draw * Poles Wires

Gas Ovens 220-230V 120V (transformer) 1 Ph 50 Hz 8A 2 Pole 3 Wire (1 hot, 1 neut, 1 gnd) Electric Ovens 380-400V 120V (transformer) 1 Ph 50 Hz 39A 2 Pole 5 Wire (3 hot, 1 neut, 1 gnd) * CAUTION: The current draw shown in the chart above is an average value for normal operation. The initial amperage draw on oven startup

may exceed the listed value. IMPORTANT: Additional electrical information is provided on the oven's serial plate, and on the wiring diagram inside the machinery compartment.

Table 1-4: Gas orifice and pressure specifications (per oven cavity)

Gas Type dia. dia. dia. II

PS360U, PS360L

Natural, G20 5.50mm 0.635mm 1.65mm 20 20 -- 20-25 20 6.8 40kw 4.2m3h 70.0 l/min Natural, G25 5.50mm 0.635mm 1.65mm -- 20 25 -- -- 10.5 40kw 4.2m3h 81.7 l/min Natural, G20, G25 4.50mm 0.635mm 1.50mm 20 20 25 20-25 20 6.8-10.5 40kw 4.2-4.9m3h 70.0-81.7 l/min Liquid, G30 2.70mm 0.381mm 0.85mm 29-37 -- 28-30 29-37 50 * 40kw 3.1kg/h -Liquid, G30, G31 3.10mm 0.381mm 0.95mm -- 50 30 -- 50 * 40kw 3.1kg/h --

PS360WB-U, PS360WB-L

Natural, G20 6.30mm 0.635mm 2.30mm 20 20 -- 20-25 20 6.8 50kw 5.3m3h 88.0 l/min Natural, G25 6.30mm 0.635mm 2.30mm -- 20 25 -- -- 10.5 50kw 6.1m3h 102.4 l/min Natural, G20, G25 5.40mm 0.635mm 2.00mm 20 20 25 20-25 20 6.8-10.5 50kw 5.3-6.1m3h 88.0-102.4 l/min Liquid, G30 3.10mm 0.381mm 1.40mm 29-37 -- 28-30 29-37 50 * 50kw 3.9kg/h -Liquid, G30, G31 3.50mm 0.381mm 1.40mm -- 50 30 -- 50 * 50kw 3.9kg/h --

* Pressure regulator (governor) not in operation, system at supply (inlet) pressure. Orifice pressures apply to 15°C, 1.013mbar dry gas.

Main Blower Control Current

Supply (inlet) Pressure (mbar)

Main Pilot Bypass PT,ES, DK,FI, (manifold) Rated

Orifice Orifice Orifice GB DE NL BE,FR SE pressure Heat Supply Gas

IE,IT, AT,CH, Orifice

2H3+II2ELL3B/PII2L3B/PII2E+3+II2H3B/P

(mbar) Input Volume Flow

ENGLISH

SECTION 2 - 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.

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, national, or international codes. These codes supercede the require-

ments and guidelines provided in this manual.

SECTION 2 - INSTALLATION

I. INSTALLATION KIT

Fig. 2-1 - Installation Kit

ENGLISH

A. Installation kit components (one kit required per cavity)

Item Description Part Number Lower Oven w/o Top Lower Oven w/Top Upper Oven

1 Legs, adjustable 22450-0028 4 4 --

2a Conveyor End Stop - PS360/360S

2b Conveyor End Stop - PS360WB (Single or Split Belt) 36526 1 1 1

 Single Belt 35000-1103 1 1 1  Split Belt 35509 2 2 2

3 Attachment Plate, upper oven 35122-0049 -- -- 2 4 Thermocouple 33812-1 2 2 2 5 Screw, #10-32 x 3/8" 21256-0008 2 2 2 6 Cable Clamp 27276-0001 1 1 1 7 Screw, #2PT 10-16 x 3/4" HWH 21292-0001 2 2 14 8 Owner's Operating and Installation Manual 46486 1 1 1 9 Authorized Service Agency Listing 1002040 1 1 1

B. Additional installation kit components for gas ovens

Item Description Part Number Lower Oven w/o Top Lower Oven w/Top Upper Oven

5 Screw, #10-32 x 3/8" 21256-0008 1 1 1 7 Screw, #2PT 10-16 x 3/4" HWH 21292-0001 2 2 2

10 Gas hose, flexible 22361-0001 1 1 1 11a Flue vent, 14" (356mm) 30773 -- 1 -11b Flue vent, 29-1/2" (749mm) 30759 -- -- 1 11c Flue vent, 50" (1270mm) 30758 1 -- --

II. VENTILATION SYSTEM

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.

MOUNTING SUCH EQUIPMENT ON

THE OVEN MAY:

 VOID AGENCY CERTIFICATIONS  RESTRICT SERVICE ACCESS  LEAD TO INCREASED SERVICE

EXPENSES FOR THE OWNER

A. Requirements

CAUTION

Gas oven installations

ventilation system with electrical exhaust air sensing control.

A mechanically driven ventilation system is

RECOMMENDED for electric oven installations.

PROPER VENTILATION OF THE OVEN IS THE

RESPONSIBILITY OF THE OWNER.

REQUIRE a mechanically driven

STRONGLY

SECTION 2 - INSTALLATION

B. Recommendations

NOTE THAT THE HOOD DIMENSIONS SHOWN IN FIGURE 2

RECOMMENDATIONS ONLY. LOCAL, NATIONAL, AND

ARE INTERNATIONAL CODES MUST BE FOLLOWED WHEN INSTALLING THE VENTILATION SYSTEM. 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 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 blow at the opening of the baking chamber. Poor oven baking performance will result.

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.

must not

ENGLISH

458mm

Fig. 2-2 - Ventilation System

458mm

51mm

minimum

76mm

305mm

SECTION 2 - INSTALLATION

III. ASSEMBLY

A. Caster Removal

After moving the ovens in to the installation location, remove the casters attached to each oven cavity. These casters are provided for pre-installation movement ONLY.

ENGLISH

B. Stacking

If the installation will include upper ovens mounted atop lower ovens, stack the oven cavities.

C. Stands

If the installation includes ovens that are to be mounted on stands, assemble the ovens to the stands at this time. An exploded view of the stand is shown in Figure 2-3.

D. Flue Vent(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 2-3 - Exploded View, Oven Stand

Attachment

plates inc. w/

upper oven

installation kit

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 #1032 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.

4. Thread the thermocouple leads through the side of the machinery compartment as shown in Figure 2-5, and into the electrical box (at the right-front of the machinery compartment).

5. Connect BOTH sets of thermocouple leads to the temperature 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 compartment.

7. Repeat Steps 1-6 for any other oven cavities in the installation.

Figure 2-4 - Thermocouple Installation Locations

Thermocouples

Grommet-protected hole

Figure 2-5 - Placing the Thermocouple Leads

8=White=Positive

7=Red=Negative

R=No Connection

Ground=Shielded cable

Figure 2-6 - Thermocouple Lead Connections

V. CONVEYOR INSTALLATION

NOTE

Split belt conveyors can only be installed from the end of the

with the drive motor.

oven 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 2-7. Then, pull the sprocket assembly straight out.

1. Lift the conveyor and position it in the oven as shown in Figure 2-8.

Figure 2-8 - Inserting the Conveyor

SECTION 2 - INSTALLATION

Figure 2-7 - Removing the Conveyor Drive Sprocket

ENGLISH

Loosen conveyor collar

set screw, then pull shaft

straight out

2. Continue moving the conveyor into the oven until the frame protrudes equally from each end of the oven (about 457mm).

3. Check that the retainers located on the underside of the conveyor frame rest firmly against the lower end plug, as shown in Figure 2-9.

NOTE:

Each oven has retainer clips on the bottom of the conveyor frame, as shown in Figure 2-9. The clips are only located on the left (drive) side of the frame.

4. When the conveyor is positioned properly, check for freedom of movement of the conveyor belt by pulling it for about 60 to 90 cm with your fingers. The conveyor

must move

freely.

5. If the drive sprocket was removed when installing the conveyor, replace it at this time.

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 2-7.

7. Install the conveyor drive motor cover and tighten its hanger screw (on the rear wall of the oven).

8. Check the tension of the conveyor belt as shown in Figure 2-10. The belt should lift between 75-100mm. 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 2-10.

Figure 2-9 - Conveyor retainers

Retainer clip

Figure 2-10 - Checking the conveyor tension

75-100mm

vertical

deflection

Conveyor

tension

adjustment

screws (idler

end only)

SECTION 2 - INSTALLATION

9. If necessary, links can be added to or removed from the conveyor belt to achieve the correct deflection of 75-100mm. 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

ENGLISH

Figure 2-11. 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 2-11. 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 2-11. e. Check for freedom of movement of the conveyor belt by

pulling it for about 60 to 90 cm with your fingers. The

conveyor must move freely. f. Return to Step 8, above, to re-check the belt tension.

Figure 2-11 - Conveyor and Master Link Orientation

Direction of travel

Outside master link

orientation

CORRECT master link

position

Incorrect

master link

position

Inside master link

orientation

VI. FINAL ASSEMBLY

1. Assemble the end plugs and motor housing onto the oven.

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.

3. Refer to Figure 2-12 for the correct location of each crumb tray. Then, install the crumb trays underneath the conveyor as shown in Figure 2-13. 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.

4. Press the end stop down over the edge of the conveyor extension at the exit end of the oven. See Figure 2-13.

5. Adjust the bottom section of the legs so that the oven is level.

Figure 2-12 - Crumb tray positions

Upper Oven

(Drive End)

Upper Oven

(Idler End)

Lower Oven

Figure 2-13 - Crumb trays, extensions, and end stop

End stop

Conveyor extension

Conveyor frame

Crumb tray

VII. ELECTRICAL SUPPLY

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: All aspects of the electrical supply connection must comply with current IEC/CEE requirements and with all applicable local, national, and international codes.

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 1-1 (in Section 1,

A fused disconnect switch or a main circuit breaker (customer furnished)

MUST be installed in the electric supply line for each oven cavity. The circuit breaker/disconnect must have 3mm contact gaps breaking all poles of the supply. It is recommended that this circuit breaker/disconnect have lockout/tagout capability.

The supply conductors are to be 90°C-rated copper wiring. Additional wiring information is shown on the wiring diagrams in Section 5,

Electrical Wiring Diagrams and inside the machin-

ery compartment of the oven.

The oven requires a ground connection to the oven ground screw located in the electrical junction box. (The box is shown in Figure 2-14.) The ground connection must comply with current IEC/CEE requirements and with all applicable local, national, and international codes. If necessary, have the electrician supply the ground wire. Do NOT use the wiring

conduit or other piping for ground connections!

Description).

SECTION 2 - INSTALLATION

A. Additional Information - Gas Ovens

All electric supply connections are made via the electrical junction box on the rear of the oven, shown in Figure 2-14. The power lines then connect to the oven circuits through safety switches located inside the machinery compartment and each blower motor compartment. These switches interrupt electric power to the oven when the Machinery Compartment Access Panel is opened, OR when either of the blower or rear shrouds is removed.

B. Additional Information - Electric Ovens

A cutout in the back wall of the machinery compartment provides access to the electrical supply connections. See Figure 2-14. The actual wiring connections are made at the electrical junction box.

C. Connection

Refer to the wiring diagram inside the machinery compartment, or in Section 5 of this Manual, to determine the correct connections for the electrical supply lines. Connect the supply as indicated on the wiring diagram.

If required by national or local codes, connect an equipotential ground wire to the lug next to the

symbol. The equipotential ground connection must meet all applicable national and local code requirements.

ENGLISH

VIII. GAS SUPPLY

CAUTION

DURING PRESSURE TESTING NOTE ONE OF THE FOLLOWING:

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 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 3.45 kPa.

3. If incoming pressure is over 50mbar, 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 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.

very important to

Figure 2-14 - Utility Connection Locations

Electrical

Junction Box

Gas ovens:

19mm pipe for

gas utility connection

Electric ovens:

Cutout for electrical

connection

SECTION 2 - INSTALLATION

A. Gas Utility Rough-In Recommendations

The following gas system specifications are STRONGLY RECOMMENDED. Deviating from these recommendations may affect the baking performance of the oven.

Gas Meter

ENGLISH

 One or two oven cavities: 354  Three or four oven cavities: 566

l/sec

meter

Gas Line

 DEDICATED LINE from the gas meter to the oven  50.8mm pipe for natural gas  38.1mm pipe for propane  Maximum length: 61m. Each 90° elbow equals 2.13m of

pipe.

B. Connection

WARNING

Some procedures in this section may require conversions, readjustments, or service on the oven's gas system. Before performing these procedures, check that the main gas supply valve and the circuit breaker/fused disconnect are in the OFF ("O") position. After completing these procedures, perform a gas leak test before operating the oven.

CAUTION

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. The installation, start-up and changes required when changing from one gas type to another can be performed ONLY by a certified professional.

NOTE: The gas supply connection should be according to applicable ISO 228-1 or ISO 7-1 recommendations. All aspects of the gas supply connection must comply with current IEC/CEE requirements and with all applicable local, national, and international codes.

Check the ovens gas supply requirements before making the gas utility connection. Gas supply requirements are listed on the ovens serial plate.

Check the serial plate to determine the type of gas to be used with the oven. Check that the gas type indicated matches the local supply at the installation. If the gas type on the serial plate does NOT match the local supply, directions for converting the oven for use with other gases are described in

Preparation for

Use with Various Gases, in this section. 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 2-15; however, compliance with the applicable standards and regulations is mandatory.

Figure 2-15 - Flexible Gas Hose Installation

To Gas

Supply Pipe

Appliance

Connection/Male

Nipple

90°

Elbow

Full-Flow Gas

Shutoff Valve

Flexible

Gas Hose

Supply (inlet)

pressure tap

Governor

disabled for

liquid

propane (LP)

operation

Multifunction Gas Valve

Governor enabled for natural gas

operation

Union

Figure 2-16 - Gas Burner and Piping Assembly

Orifice

(manifold)

pressure tap

Burner Blower

High Flame

Solenoid Valve

Gas Burner

Multifunction

Gas Valve

Pilot Line

Low Flame

Bypass Line

Pilot pressure tap

C. Preparation for Use with Various Gases

Before proceeding to set up the oven for a specific gas, check that the main gas supply valve and the circuit breaker/fused disconnect are in the OFF ("O") position.

The main and pilot orifices must match the sizes shown in the Gas Orifices and Pressure Specifications table, near the beginning of this Section. If necessary, replace the orifices. Refer to Part D,

Replacing the Gas Orifices.

The orifice (manifold) pressure should be adjusted to the value shown in the Gas Orifices and Pressure Specifications table for the specific gas type and location.

1. For Use with Natural Gas The actual heat input to the oven must match the rated heat

input. The input to the burner can be determined using the orifice (manifold) pressure data or by the volume supplied using the gas meter. Both of these procedures are described in Part F,

Adjusting the Orifice (Manifold) Pressure

and Heat Input. If the measured input does not correspond with the rated

input (shown in the Gas Orifices and Pressure Specifications table), check first that the correct orifices are installed. If the orifices are correct, check and correct the supply and orifice pressures to obtain the correct input based on the gas meter reading.

2. For Use with Liquid Propane (LP) Gas When using liquid gas, the converter in the multifunction

gas valve must be removed, and then replaced INVERTED from its former position. See Figure 2-16. Inverting the converter will disable the governor. This step is only required if the supply pressure is below 50mbar.

Figure 2-17 - Replacing the Main and Pilot Orifices

Venturi

assembly

Pilot

orifice

Compression

nut

Pilot tube

Main

orifice

SECTION 2 - INSTALLATION

D. Replacing the Gas Orifices (if so required)

1. Replacing the Main Orifice a. Check that the main gas supply valve and the circuit

breaker/fused disconnect are in the OFF ("O") position.

b. Open the union in the gas supply line. The union is

shown in Figure 2-16, on the previous page.

c. Refer to Figure 2-17. Unscrew the four hex screws that

hold the venturi mounting plate to the front of the burner. Remove the gas train/venturi assembly from the oven.

d. Remove the two 1/2" nuts that secure the gas train to

the venturi mounting plate. e. Remove the main orifice using an 11/16" wrench. f. Install the new orifice.

2. Replacing the Pilot Orifice

NOTE: All natural gases use the same size pilot orifice (0,635mm), as do all liquid propane (LP) gases (0,381mm). Because of this, it is not normally necessary to replace the pilot orifice unless converting the oven from natural to propane, or from propane to natural, operation.

a. Refer to Figure 2-17. Unscrew the pilot tube

compression nut and slide it out of the way. Pull the

tube from the fitting to expose the pilot orifice. b. Remove the pilot orifice. c. Slip the new pilot orifice into the pilot tube. d. Push the pilot tube back into place until it bottoms, and

hold it in place. Slide the compression nut back into

place and engage the threads. Tighten the nut to a

snug fit with your fingers. e. Gently tighten the nut one complete turn with a wrench.

DO NOT OVERTIGHTEN THE COMPRESSION NUT.

3. Replacing the Bypass (Low Flame) Orifice a. Refer to Figure 2-16. Note the locations of the 1/2" hex

compression nuts that hold the bypass line in place. Loosen the compression nuts using a 1/2" wrench.

b. Remove the bypass tube. Then, remove the bypass

orifice from the tube. c. Slip the new orifice into the bypass tube. d. Replace the tube onto its fittings on the solenoid valve.

While holding the tube in place, slide the compression

nuts back into place and engage the threads. Tighten

the nut to a snug fit with your fingers. e. Gently tighten the nuts one complete turn with a wrench.

DO NOT OVERTIGHTEN THE COMPRESSION NUTS. f. Replace the gas train and venturi by following Steps a-

Replacing the Main Orifice, above, in reverse order.

d in

WARNING

After completing these procedures, perform a gas leak test before operating the oven.

ENGLISH

Ignition sensor

wire

Venturi

mounting

plate

Main orifice

holder (attached

to gas train)

SECTION 2 - INSTALLATION

E. Checking the Gas Supply (Inlet) Pressure

1. Remove the supply (inlet) pressure cap screw from the multifunction gas valve. Attach a manometer to the stud.

2. Depress the machinery compartment safety switch to

ENGLISH

allow the oven to operate.

3. Open the main gas supply valve. Switch the circuit breaker/ fused disconnect to the ON ("I") position.

4. Start the oven and adjust the temperature controller to the maximum setting (288°C).

5. Measure the supply (inlet) pressure.

6. Switch the oven off. Close the main gas supply valve, and switch the circuit breaker/fused disconnect to the OFF ("O") position. Remove the manometer, and replace the cap screw onto the multifunction gas valve.

7. Compare the measured supply (inlet) pressure to the nominal pressures shown in the Gas Orifices and Pressure Specifications table.

If the supply pressure is lower or higher than the nominal pressure, the reason should be investigated and the gas supplier contacted.

For natural gas ovens, if the measured supply pressure is lower than 17mbar, or higher than 25mbar, contact the gas supplier. DO NOT OPERATE THE OVEN or adjust the oven controls.

F. Adjusting the Orifice (Manifold) Pressure and Heat Input

To use the orifice pressure method, you must know the specific gas type and quality used. If using the orifice pressure method, you should double-check the input using the volumetric method.

To use the volumetric method, you must know the heat value (HuB) of the gas used. This information is available from your gas supplier.

During these measurements, do not operate any other appliances that use the same gas meter as the oven.

1. Orifice (Manifold) Pressure Method a. Check that the main gas supply valve and the circuit

breaker/fused disconnect are in the OFF ("O") position.

b. Remove the regulated (manifold) pressure cap screw

from the multifunction gas valve. Attach a manometer to the stud.

c. Remove the cap screw from the pressure adjustment

screw (governor) on the multifunction gas valve.

d. Depress the machinery compartment safety switch to

allow the oven to operate.

e. Open the main gas supply valve. Switch the circuit

breaker/fused disconnect to the ON ("I") position.

f. Start the oven and adjust the temperature controller to

the maximum setting (288°C).

g. Adjust the pressure adjustment screw as necessary

to match the correct pressure for the oven's specific gas type. Refer to the Gas Orifices and Pressure Specifications table. Turning the adjustment screw clockwise increases the flow, while turning it counterclockwise reduces the flow.

h. Switch the oven off. Close the main gas supply valve,

and switch the circuit breaker/fused disconnect to the OFF ("O") position. Remove the manometer, and replace the cap screws onto the multifunction gas valve.

2. Volumetric Method a. Determine the time of 0.1m

(100 liters) of gas usage

as follows.

Consumption (m

/hr.) =

NB (Rated input in kW)

HuB (Heat [Calorific] value

of gas in kW/m3)

Time (in minutes) of

0.1m3 of gas usage

Consumption

b. Check that the main gas supply valve and the circuit

breaker/fused disconnect are in the OFF ("O") position.

c. Remove the cap screw from the pressure adjustment

screw (governor) on the multifunction gas valve.

d. Depress the machinery compartment safety switch to

allow the oven to operate.

e. Open the main gas supply valve. Switch the circuit

breaker/fused disconnect to the ON ("I") position.

f. Start the oven and adjust the temperature controller to

the maximum setting (288°C).

g. Adjust the pressure adjustment screw as necessary

to match the calculated volume using the time (in minutes) of 0.1m

of gas usage. Turning the adjustment screw clockwise increases the flow, while turning it counterclockwise reduces the flow.

h. Record the reading obtained from the gas meter and

calculate the obtained gas flow. Compare this value to the information in the Gas Orifices and Pressure Specifications table.

i. Switch the oven off. Close the main gas supply valve,

and switch the circuit breaker/fused disconnect to the OFF ("O") position. Replace the cap screw onto the multifunction gas valve.

SECTION 3 - OPERATION

I. LOCATION AND DESCRIPTION OF CONTROLS

Fig. 3-1 - Control Panel

Conveyor Speed

") controller(s)

ENGLISH

"RESET"

) switch

(

GAS OVENS ONLY

"BLOWER" Switch: Turns the blowers and

"BLOWER"

switch

cooling fans on and off. The HEAT Switch has no effect unless the BLOWER Switch is in the ON position.

"HEAT" ("

switch

"CONVEYOR"

switch

Conveyor Speed Controller: Adjusts and displays the bake time. Single-belt ovens have one controller. Split belt ovens have one controller for each conveyor belt, labeled "FRONT" and

Digital Temperature

") controller

"BACK."

"HEAT" Switch: Allows the burner or heating

elements, as appropriate for the oven model, to activate. Activation 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 activation of the burner or heating elements.

"CONVEYOR" Switch: Turns the conveyor drive

motor on and off.

NOT SHOWN:

"RESET" Switch: Gas ovens only. Illuminates

if the gas burner does not light. The switch can be pressed repeatedly to attempt to light the burner. If the burner does not light within 15 minutes, the "RESET" (

) switch is locked out.

G. 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.

+ 33 hidden pages