Metos PS520E-1 Owner's manual

CONVEYOR OVEN

TYPE: PS 520

Installation and Operation Manual

S/N: Rev.: 3.0

6.9.2006 Rev. 3.0

Dear Customer,

Congratulations on deciding to choose a Metos appliance for your kitchen activities. You

made an excellent choice. We will do our best to make you a satisfied Metos customer

like thousands of customers we have around the world.

Please read this manual carefully. You will learn correct, safe and efficient working meth-

ods in order to get the best possible benefit from the appliance. The instructions and hints

in this manual will give you a quick and easy start, and you will soon note how nice it is

to use the Metos equipment.

All rights are reserved for technical changes.

You will find the main technical data on the rating plate fixed to the equipment. When you

need service or technical help, please let us know the serial number shown on the rating

plate. This will make it easier to provide you with correct service.

For your convenience, space is provided below for you to record your local Metos service

contact information.

METOS TEAM

Metos service phone number:...............................................................................................

Contact person:....................................................................................................................

6.9.2006 Rev. 3.0

6.9.2006 Rev.

1. General .......................................................................................................... 1

1.1 Symbols used in the manual .......................................................................................... 1

1.2 Symbols used on the appliance ...................................................................................... 1

1.3 Checking the relation of the appliance and the manual ................................................. 1

2. Safety .............................................................................................................. 2

2.1 Safe use of the appliance ............................................................................................... 2

2.2 Safety instructions in case of malfunction ..................................................................... 2

2.3 Disposal of the appliance ............................................................................................... 2

3. Functional description .................................................................................. 3

3.1 General .......................................................................................................................... 3

3.2 Oven components .......................................................................................................... 4

3.2.1 Conveyor motor and conveyor belt ....................................................................... 5

3.2.2 Blower fan .............................................................................................................. 5

3.2.3 Electric heaters ....................................................................................................... 6

3.2.4 Cooling fan ............................................................................................................ 6

3.2.5 Air fingers and blank plates ................................................................................... 7

3.3 Control functions ........................................................................................................... 9

3.3.1 Door safety switch ................................................................................................. 9

3.3.2 Blower switch ...................................................................................................... 10

3.3.3 Heat switch .......................................................................................................... 10

3.3.4 Temperature controller ........................................................................................ 10

3.3.5 Conveyor .............................................................................................................. 10

3.4 Control panel ............................................................................................................... 12

4. Operation instructions ............................................................................... 14

4.1 Operation procedures ................................................................................................... 14

4.1.1 Daily start-up procedure ...................................................................................... 14

4.1.2 Daily shutdown procedure ................................................................................... 15

4.2 Cleaning and maintenance ........................................................................................... 16

4.2.1 Daily cleaning and maintenance .......................................................................... 16

4.2.2 Monthly cleaning and maintenance ..................................................................... 18

5. Installation ................................................................................................... 32

5.1 General ........................................................................................................................ 32

5.2 Ventilation guidelines .................................................................................................. 32

5.3 Positioning the ovens ................................................................................................... 33

5.4 Electric connection ...................................................................................................... 33

6.9.2006 Rev.

6. Troubleshooting .......................................................................................... 35

8. Technical specifications .............................................................................. 51

6.9.2006 Rev. 3.0

General

1

1. General

Carefully read the instructions in this manual as they contain important information re-

garding proper, efficient and safe installation, use and maintenance of the appliance.

Keep this manual in a safe place for eventual use by other operators of the appliance.

The installation of this appliance must be carried out in accordance with the manufactur-

er’s instructions and following local regulations. The connection of the appliance to the

electric and water supply must be carried out by qualified persons only.

Persons using this appliance should be specifically trained in its operation.

Switch off the appliance in the case of failure or malfunction. The periodical function

checks requested in the manual must be carried out according to the instructions. Have the

appliance serviced by a technically qualified person authorized by the manufacturer and

using original spare parts.

Not complying with the above may put the safety of the appliance in danger.

1.1 Symbols used in the manual

This symbol informs about a situation where a safety risk might be at hand. Given instruc-

tions are mandatory in order to prevent injury.

This symbol informs about the right way to perform in order to prevent bad results, appli-

ance damages or hazardous situations.

This symbol informs about recommendations and hints that help to get the best perform-

ance out of the appliance.

1.2 Symbols used on the appliance

This symbol on a part informs about electrical terminals behind the part. The removal of

the part must be carried out by qualified persons only.

1.3 Checking the relation of the appliance and the manual

The rating plate of the appliance indicates the serial number of the appliance. If the man-

uals are missing, it is possible to order new ones from the manufacturer or the local rep-

resentative. When ordering new manuals it is essential to quote the serial number shown

on the rating plate.

6.9.2006 Rev. 3.0

Safety

2

2. Safety

2.1 Safe use of the appliance

The oven has to be used by trained personnel only.

Do not store any combustible materials or flammable liquids anywhere near the appliance.

Never disassemble or clean the oven with the blower switch or any other oven control

turned “ON” or “I”. Turn “OFF” or “O” and lockout all electric power to the oven before

attempting to clean or service this oven.

Never use a water hose or pressurized steam cleaning equipment when cleaning the oven.

Do not use any abrasive cleaning materials or a caustic cleaner when cleaning the oven.

Do not operate oven if the cooling fan is not running or vent grille is plugged.

Crumb pan is extremely hot while oven is operating. Allow oven to cool before removing

crumb pan.

2.2 Safety instructions in case of malfunction

If the oven doesn’t work properly or in case of malfunction, turn off the power and call

for service. In emergency turn off the power with the general cut out switch.

2.3 Disposal of the appliance

The destroying of the appliance when its economical lifetime has been reached may be

harmful to the environment if not properly handled. Utilization of materials that are reus-

able is best done by professional personnel specialized in recycling.

6.9.2006 Rev. 3.0

Functional description

3

3. Functional description

3.1 General

The PS 520 ovens can be used to bake and/or cook a wide variety of food products, such

as pizza, pizza-type products, cookies, sandwiches, fish, steaks, chicken and others.

The PS 520 ovens may be used either as a single oven or stacked for use as double or triple

ovens.

A single PS 520 oven is mounted on a base pad with legs.

A double oven consists of two stacked single ovens.

6.9.2006 Rev. 3.0

Functional description

4

A triple oven consists of three stacked single ovens. The lower oven is mounted on a base

pad.

On a double or triple oven, the ovens operate independently. All ovens use identical con-

trols and components. One oven can be cleaned or serviced, while the others are operat-

ing.

3.2 Oven components

6.9.2006 Rev. 3.0

Functional description

5

3.2.1 Conveyor motor and conveyor belt

The conveyor belt is driven by a variable-speed electric motor operating through a gear

reducer. The motor speed is controlled by a digital control. The stainless steel wire belt

can travel in either direction at variable rates ranging from 3 minutes to 30 minutes. this

is the time that a product can take to pass through the oven.

3.2.2 Blower fan

6.9.2006 Rev. 3.0

Functional description

6

The blower fans are located at the rear of the oven. these blowers force heated air through

the air fingers.

The blower switch must be set to “ON” or “I” for oven warm-up and baking.

3.2.3 Electric heaters

There is one heater element mounted on the inside of the rear panel. The element is con-

nected to an electrical control which is energized by the temperature controller.

3.2.4 Cooling fan

The cooling fan is located in the back of the oven. The cooling fan draws air through its

grille, blowing it through the blower motor compartment and the control compartments

into the oven top and exhausted out the front louvres.

6.9.2006 Rev. 3.0

Functional description

7

3.2.5 Air fingers and blank plates

An air finger assembly is made up of three parts:

1.Outer plate is the removable covering with tapered holes, which direct the air stream

onto the product being baked.

2.Inner plate - the perforated inner plate is vital in forming the unique air jets. It must be

assembled into manifold with its holes aligned with the holes of the outer plate.

Blank plates are available to install on the plenum where an air finger is not required.

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6.9.2006 Rev. 3.0

Functional description

8

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6.9.2006 Rev. 3.0

Functional description

9

3.3 Control functions

3.3.1 Door safety switch

The door safety switch is located at the lower right side of control panel opening. Opening

the control panel door permits this switch to open, disconnecting power to all electrical

controls.

Do not touch the wires going to this safety switch. Current is always present.

6.9.2006 Rev. 3.0

Functional description

10

3.3.2 Blower switch

The blower switch has two positions. The switch must be “ON” or “I” for the main blow-

ers to come on and permit the oven to run. The fan circulates the air throughout the oven

and must stay on during baking and during the cool down cycle above 93°C to prevent

blower bearing damage. To protect the blower motor and bearings a thermostatic override

is built into the oven. If the temperature inside the oven is over 82°C, the main blower will

continue to run after the blower switch is turned to the “OFF” or “O” position.

3.3.3 Heat switch

Turning the HEAT switch to “ON” or “I” will energize the electric heating system. The

switch is in series with the blower fan motor and high temperature override switch. Both

switches must be closed before the heating elements can be energized.

3.3.4 Temperature controller

The temperature controller is a solid state PID type to maintain the operator-set tempera-

ture. The temperature controller continuously monitors the oven temperature and turns on

the modulating solid state relay controller. The heat is on for the time required to main

tain a constant oven temperature.

The temperature controller contains a low-limit switch which allows the oven to cool

down to 93°C before shutting off the blower. A high-limit indication (ALM1) will appear

on the display if the oven reaches 343°C.

3.3.5 Conveyor

The on-off switch for the conveyor motor is on the control panel. Also on the control panel

is the digital conveyor speed control. The digital control can be adjusted from 3 min. to

30 min. bake time (conveyor speed).

Conveyor speed is measured by the amount of time it takes for an item to go through the

bake chamber of the oven.

6.9.2006 Rev. 3.0

Functional description

11

To check conveyor speed, place a product item at the entrance end of baking chamber as

shown in the picture above. Time how long it takes for the leading edge of the item to go

from the entrance end of baking chamber to the exit end. this should be the conveyor

speed shown on the conveyor speed digital control.

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6.9.2006 Rev. 3.0

Functional description

12

3.4 Control panel

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6.9.2006 Rev. 3.0

Functional description

13

• Display shows the set point or the actual temperature in degrees (Fahrenheit or

Celsius).

• “HEAT ON” lights when the burner is in operation.

• “SET PT” lights when the set point is shown in the display.

• “ACTUAL TEMP” lights when the actual temperature is shown in the display.

• SERVICE KEY - service use only.

• 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.

• UP ARROW and DOWN ARROW KEYS - press these keys to adjust the Set Point

up or down. If the Set Point will not change, refer to Set Point Key and Unlock Key

in this section.

• 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.

• TEMPERATURE KEY - press this key once to view the Actual Temperature in

the Display.

• OVERTEMP lights when the oven temperature is greater than 343°C. Refer to

Quick Reference: Troubleshooting.

• SP LOCK lights when the set point is locked from changes. This setting can only

be changed by service personnel.

6.9.2006 Rev. 3.0

Operation instructions

14

4. Operation instructions

4.1 Operation procedures

4.1.1 Daily start-up procedure

Check that the circuit breaker/fused disconnect switch is in the ON position. Check that

the oven window (if so equipped) is closed.

1. Turn the “BLOWER” switch to the “ON” (“I”) position. This starts

the main blower fan and cooling fans. The blower circulates air

through the air fingers and must stay on during the cooking or baking

process. Check if the cooling fans are operating when the blower

switch is turned “ON” or “I” position.

2. Turn the “CONVEYOR” switch to the “ON” (“I”) position. Set the

conveyor speed for the desired baking time.

3. If necessary, adjust the conveyor speed setting by pressing the “up ar-

row” or “down arrow” push buttons on the conveyor speed controller

to change the displayed bake time.

4. Adjust the temperature controller to a desired set temperature if nec-

essary.

• Press the Set Point and Unlock keys at the same time. Wait for

for the “SET PT” light to turn on.

• Press the Up Arrow and Down Arrow keys as necessary to ad-

just the set point.

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Metos PS520E-1 Owner's manual

Metos PS520E-1 Owner's manual

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