Service Manual P3

Service Handbook OEB/OES/OGB/OGS

KD / 01.09.04 Cover sheet Page 1 / 1

CONVOTHERM Elektrogerte GmbH

Service Documents OEB / OES OGB / OGS Service Folder No.:

(English)

Name:

Specifications are subject to change without notice.


KD / 01.09.2004 Acknowledgement Service Handbook Page 1 / 1

Acknowledgement Please fill out legibly and return to CONVOTHERM Customer Service Department. CONVOTHERM Elektrogerte GmbH - Service Department - Talstrae 35 82436 Untereglfing Germany

We hereby acknowledge receipt of a CONVOTHERM Service-Folder and confirm that we have taken note of the below mentioned copyright.

Copyright

We reserve all rights relating to this technical document. This document may not be reproduced or made available to a third party without our prior consent and it must not be misused otherwise by the recipient or a third party (DIN 34).

Service Folder No.: Name:

Company:

Street:

Area Code / City:

Country:

E-Mail:

__________________ __________________________ date stamp / signature

i

This service folder is subject to change notifications! New information will be sent to the above address.


KD / 02.08.2005 0_01e_Table of Contents_b.doc

Page 1 / 4

Table of Contents

1. Installation Handbook

2. Unit Information OEB/OES/OGB/OGS

2.1 Control Panels OEB/OES/OGB/OGS

2.2 The closed system automatic steam and heat circulation

2.3 Basic settings (parallel to cooking programmes)

2.3.1a Standby mode for units with steam generator

2.3.1b Standby mode for units with direct injection

2.3.2 Outgoing water cooling

2.3.3 Demoisturizing in a Closed System (Crisp & Tasty)

2.3.4 Steam generator draining and rinsing

2.3.5 Automatic Cleaning (optional)

2.3.6 Water Flow plan

2.4 Safety settings (parallel to cooking programmes)

2.4.1 Door safety switch and Motor break

2.4.2 Electronic safety switches

2.4.3 Electrical safety switches

2.5 Functioning of the cooking programmes

2.5.1 Steaming at 100C

2.5.2 Steaming under 100C

2.5.3 Superheated Steam and Steaming over 100C

2.5.4 Convection

2.5.5 Regeneration

2.5.6 Delta-T cooking

2.5.7 Cook & Hold

2.5.8a Overview Chart: Processes and probes in units with steam generator

2.5.8b Overview Chart: Processes and Probes in units with direct injection

2.6 Gas technology



Page 2 / 4

3. Electronics Information OEB/OES/OGB/OGS

3.1 Customer Service Service Programme

3.2 Error Codes

3.3 Emergency programme

3.5 Connection scheme of Control module and Gas module

4. Cleaning / Maintenance

4.1 Time table for necessary cleaning intervals

4.2 Automatic flushing of the steam generator on units with steam generator

4.3 Cleaning the Unit

4.3.1Cleaning the oven

4.3.2 Half-automatic oven cleaning

4.3.3 Automatic Cleaning System CONVOClean system (Option)

4.3.4 Further cleaning measures

4.4 CONVOTHERM Descaling

4.4.1 Oven descaling in units with direct injection (OES / OGS)

4.4.2 Steam generator cleaning and descaling (nur bei OEB und OGB)

4.4.3 Unit parts descaling

4.6 Yearly Maintenance recommendations

4.6.1 Installation Check

4.6.2 Cleaning the combination oven steamer

4.6.3 Checking the electrical parts

4.6.4 Check and Visual check

4.6.5 Check the gas technical parts

4.7 Installation Checklist



Page 3 / 4

5. Trouble shooting List and Error Codes Electronic

5.1 Error Codes

5.2 General

5.3 Steam Generator

5.4 Condenser

5.5 Motor

5.6 Electronic

5.7 Safety temperature probe Convection heating (B7)

5.8 Error diagnosis with help of the LEDs on the Controls(module self-checking)

6. Service Instructions

6.1 Electronic Control Board installation

6.1.1Operation module (BM) replacement

6.1.2Control Module (SM) replacement

6.1.3Arrangement module replacement

6.1.4Gas module (GM) removal

6.1.5Description of the LEDs on the Controls (module self-checking)

6.4 Steam Generator drain pump (only OEB and OGB)

6.5 Probe positions / Probe assembly and replacing

6.5.1Safety thermostat above unit ceiling on table units

6.5.2Safety thermostat behind the motor fastening on standing units

6.5.3Probe with stuffing box assembly B10 (CTC)

6.5.4Safety thermostat probe N8 on flange immersion heater

6.5.5Double safety thermostats B8 and B7.2 in gas units with blower burner

6.5.6Screw in probes B3, B4, B5 and oven probe B6

6.6 Water Level probe

6.7 Steam Generator-Immersion heater replacement (only OEB)

6.8 Motor installation and removal

6.10Dummy operation for P3 units



Page 4 / 4

6.11Condenser removal and installation

6.12Door latch / Door contact switch removal and installation

6.13Using the water analysis unit Article No.: 3019007

6.15Sealing the Corners on the Door Gasket Frame

6.17Inner and outer door replacement

6.21Convection Heater removal and replacement

6.25Gas valve adjustment with blower burner

6.26Changing the gas type

6.30Disappearing Door Replacement / Adjustment / Spare Part Replacement

7. Wiring diagrams

8. Spare Parts List


KD / 01.09.2004 0_02e_Depictions_a.doc

Page 1 / 2

In this Service Handbook, the following pictures and depictions are used as important safety advice for the installer and to a certain extent for the user. The safety advice and especially the warnings are to be absolutely observed and followed.

Bold print indicates important safety advice.

Attention: indicates danger to people, unit parts or possible damage to functions.

Attention: Danger of explosion

Attention: Dangerous voltage

Attention Danger of burning: Danger due to hot surfaces

or mediums i.e. steam.

Attention: Observe loading height

Advice to be passed on to the user!

Pictures indicating for electric units

Pictures indicating for gas units

Pictures indicating for units with steam generator

Pictures indicating for units with Direct injection


KD / 01.09.2004 0_02e_Depictions_a.doc

Page 2 / 2

Instructions

Advice

Information

Check

Special tool

Tips and Tricks

Cross reference

i


KD / 01.09.2004 0_03e_Telephone numbers_a.doc

Page 1 / 1

( CONVOTHERM Telephone numbers

Telephone (Main): (+49) (0) 8847 - 67 0 Fax: (+49) (0) 8847 - 414 - 67 191

Sales Domestic:

ENODIS Deutschland GmbH (+49) (0) 2772 - 58 05-0 Auf der Weih 11 35745 Herborn

e mail [email protected]

Sales Export: (+49) (0) 8847 - 67-0

e - mail [email protected]

User Hotline

Hotline (daily 8 20 Uhr) (+49) (0) 8847 - 67-899 e mail [email protected] [email protected]

Customer Service (+49) (0) 8847 - 67-

Service Hotline (office) -541 -545 Service Hotline (weekends) (+49) (0) 175 - 405 41 09

e mail [email protected] Internet www.convotherm.com


KD 02.08.2005 0_04e_Safety Advice_a.doc

Page 1 / 2

Safety Advice

Improper positioning, installation, setting, training, service or maintenance, as well as changes on the unit can cause injuries that could lead to death of the installer or operator and also lead to damage on the unit. Please note that any improper performance regarding the above, invalidates the guarantee. Before looking for an error or performing maintenance or repair work on the unit, thoroughly and carefully read through the Safety Advice and the appropriate Service Instructions. Observe also the relevant Safety Advice in the Installation Handbook and the User Manual. Both are included in the unit shipment. Check with your Customers.

Hazardous

Attention - Danger of explosion when gas odor is present Immediately shut off the gas supply Ventilate the room thoroughly Avoid sparks (this means the operation of switches, telephones or contact with

electric switching elements ) or open flames. Inform the gas supplier and/or the fire department (external telephone).

Attention - Electric shock The combination oven steamer main power supply must be shut off before

opening the side panel and performing maintenance or repair work (only by a certified electrician) !

An all-pole isolation switch with a minimum contact opening of 3mm must be located close to the unit - on site in order to switch off the power supply when outer cleaning is performed, repair or installation work is done and during longer times that the unit is out of operation.

Danger of injury

Attention - Danger of scalding or burning: Maintenance and repair work should only be performed on a cold unit! Never spray into a hot oven with the hand shower! Allow combination oven steamer to cool down to an oven temperature under

60C.

General Advice

Observe all prevailing regulations and standards. Only use original spare parts.


KD 02.08.2005 0_04e_Safety Advice_a.doc

Page 2 / 2

Gas units

CONVOTHERM OGS / OGB 6.10: 170 kg

CONVOTHERM OGS / OGB 6.20: 220 kg

CONVOTHERM OGS / OGB10.10: 215 kg

CONVOTHERM OGS / OGB10.20: 245 kg

CONVOTHERM OGS / OGB12.20: 325* kg

CONVOTHERM OGS / OGB20.10: 340* kg

CONVOTHERM OGS / OGB20.20: 440* kg* = incl. loading trolley

Electric units

CONVOTHERM OES / OEB 6.10: 170 kg

CONVOTHERM OES / OEB 6.20: 220 kg

CONVOTHERM OES / OEB10.10: 215 kg

CONVOTHERM OES / OEB10.20: 245 kg

CONVOTHERM OES / OEB12.20: 325* kg

CONVOTHERM OES / OEB20.10: 340* kg

CONVOTHERM OES / OEB20.20: 440* kg* = incl. loading trolley

Safety Advice for Service work

Attention Lifting or sliding unit: Avoid damaging the power, water and drainage connections when moving the

unit. Make sure that the unit is secured against tilting or slipping while being

moved. Observe the weight of the unit:

Attention Working in the connection area of the unit: Work in the connection area of the unit must be carried out by a qualified

electrician in accordance with the local power supply company regulations as well as current EU regulations.

When working in the connection area, the unit main power supply must be shut off (an all-pole isolation switch with a minimum contact opening of 3mm must be located close to the unit) Make sure that the unit's power has indeed been switched off!

After servicing, a final test, according to the local and current regulations, must be performed.

Attention working on the unit's gas system: Working on the gas technology in a unit can only be performed by a qualified

installer from an authorized gas supplier. Check all connection points outside and inside the unit for sealed tightness

(with a gas detector or leakage spray).Attention: Do not spray leakage spray on electrical components of the ignition and flame monitoring devices!


KD / 01.09.2004 0_05e_Shipping information_a.docPage 1 / 2

Shipping Information

Please note when returning defective spare parts (under warranty or for replacement) to C O N V O T H E R M that it is necessary that the completely filled out Return Tag be attached directly to the spare part ( not outside on the package ).

If you dont have a Return Tag available, you can fill out the required information on a separate paper and attach it to the spare part.

To guarantee quick and efficient processing, the following information is absolutely necessaary

Your C O N V O T H E R M Service Team


KD / 01.09.2004 0_05e_Shipping information_a.docPage 2 / 2

Shipping Information/ Environmental protection

Dear Customer and interested party,

We are certified in accordance with ISO 9001 (Quality Assurance) and ISO 14001 (Environmental protection) and we are committed to lowering the effects of environmental waste. Thereby, there are additional regulations to follow for environmental protection and conservation that go beyond the essential statuatory rules and regulations.

Therefore:

- Only residue-free organic filling material is used.

- Shipping cartons are reused.

- Supplier parts are only used that are packed in environmentally friendly materials.

- Recommended/Applied Cleaning materials are biodegradable.

- Electronic scrap is collected and brought to recycling centers.

- Scrap units are dismantled by a specialized company and recycled.

Commit yourself to environmental protection with us, so that together we can work to avoid waste in the future.

When shipping to CONVOTHERM use only organic material.

A complete avoidance of waste is not possible.

However, there are advantages to making an effort at reduction, that when done together can make it financially worth our while.

Responsible and conscientious purchasing is not only applied environmental protection but at the same time business protection. Take the opportunity to admonish waste.

Your C O N V O T H E R M Service Team


KD / 01.09.2004 2_01e_Control Panels_a.doc

Page 1 / 1

2.1 Control Panels OEB/OES/OGB/OGS

1 = ON / OFF

2 = Cooking programme ,Steaming

3 = Cooking programme ,Superheated steam

4 = Cooking programme ,Convection

5 = Cooking programme, Regeneration

6 = Start / Stop

7 = Cookbook (Choose recipe)

8 = Mr.C

9 = Writing / Editing (in Cookbook)

10 = reduced power (Option for CONVOTHERM OES and OGS)

11 = Burner or heater on

12= reduced fan speed (Option for CONVOTHERM OES and OGS)

13 = Cooking mode

14 = Button lock

15 = Crisp & tasty (Demoisturizing)

16 = Programme protection

17 = Display

18 = Oven temperature

19 = Cooking time

20 = Core temperature (Option for CONVOTHERM OES and OGS)

21 = Page / Scroll left

22 = Page / Scroll right

23 = Setting switch

24 = Press & Go (Pictogram keys)

Cross reference: Further information on Control panels refer to User Manual


KD / 01.09.2004 2_02e_The Closed System_a.doc

Page 1 / 1

2.2 The Closed System automatic steam and heat circulation

Electric unit with steam generator (OEB) Gas unit with steam generator (OGB)

Electric unit with direct injection (OES) Gas unit with direct injection (OGS)

1 = Pressure compensation valve 2 = Fan 3 = Suction panel 4 = Oven 5 = Convection heater / Convection heat exchanger 6 = Air and Steam circulation 7 = Cover for Demoisturizing insert 8 = Oven drain 9 = Demoisturizing insert 10 = Condenser 11 = Hydraulic seal in condenser 12 = Injection nozzle for Demoisturizing 13 = Condenser outlet 14 = Condenser over flow

15 = Injection nozzle Condenser cooling 16 = Water inlet Demoisturizing 17 = Water inlet Condenser cooling 18 = Water inlet Steam generator filling / Water inlet

direct injection 19 = Breather pipe 20 = Ventilation pipe 21 = Water level probe / Direct injection 22 = Steam generator 23 = Steam outlet opening 24 = Fan 25 = Immersion heating element / Steam generator

heat exchanger 26 = Pump for draining the steam generator

Information: Advantages of the original CONVOTHERM CLOSED SYSTEM Greater steam and temperature saturation More intensive heat transfer Shorter cooking times Less energy and water consumption "Quick steam cooking" pressureless over 100 C Optimum automatic steam regulation specific to product No unwanted odors during the cooking process

i


KD / 01.09.2004 2_03_01e_Standby mode_a.doc

Page 1 / 2


2.3.1a Standby mode for units with steam generator

Information: After switching on, the steam generator 4 is automatically filled with water and preheated. Solenoid valve Y3 7 opens; water flows through the injection nozzle 10 and

the back flow protection 9 in the steam generator 4. The water level rises. When the shorter water level probe is reached (B1 - bl)

2 the solenoid valve closes Y3 7 and the contactors K1, K2 and K3 switch the steam generator immersion heating element 5 on, as in Gas units the automatic firing N21 switches the steam generator burner 6 on.

The opening and closing of the solenoid valve Y3 7 maintains the correct water level during operation via the water level probe (B1 - bl) 2.

The water in the steam generator is preheated to 80 - 90 C. The preheating probe B4 3 in the settling chamber 1 monitors the minimum

temperature.

i


KD / 01.09.2004 2_03_01e_Standby mode_a.doc

Page 2 / 2

Notice: The control loop of the cooking programme has priority over the standby mode

of the steam generator. This means, for example, that the convection programme selected temperature will be attained first, before the steam generator standby mode temperature is attained.

When the water level falls below the longer level probe (B1 - rd) 2 within a short time an error code is triggered.

The steam generator temperature is regulated by the preheating probe B4 3. Only after the oven has reached the standby mode temperature, will the timer

begin running in programmes with steam. A safety thermostat monitors the maximum temperature of the heaters and

burners.

Cross reference: Service Handbook 6.7 Assembly of the Steam generator and Immersion

heating element. Service Handbook 6.6 Water Level Probe Service Handbook 5. Trouble shooting and Error Codes Electronic

2.3.1b Standby mode for units with direct injection

Notice: Units with direct injection are in standby mode directly after being switched on.


KD / 01.09.2004 2_03_02e_Outgoing water cooling_a.doc

Page 1 / 1


2.3.2 Outgoing water cooling

1 = Demoisturizing tub 2 = Oven drain with Condenser connection 3 = Oven floor 4 = Water inlet Condenser cooling 5 = Water drainage Door drip tray 6 = Bypass probe B5 7 = Bypass section 8 = Solenoid valve Condenser "cooling" Y1

9 = Bypass pipe 10 = Condenser over flow 11 = Condenser drain 12 = Cold water injection Condenser 13 = Condenser probe B3 14 = Condenser 15 = Ventilation section 16 = Electronic controls Control module 17 = Water inlet Demoisturizing 18 = Injection nozzle Demoisturizing

Information: The Condenser probe (B3) 13 monitors the outgoing water temperature in the condenser. The solenoid valve Y1 8 opens if the temperature rises to approximately 65 C . Cold water is injected through the injection nozzle 12 until the outgoing water has cooled down to an acceptable temperature.

Check: Noise, water flowing back out of the drain.

Cross reference: Service Handbook 6.11 "Condenser removal and assembly Service Handbook 5. Trouble shooting and Error Codes Electronic

i


KD / 01.09.2004 2_03_03e_Demoisturizing in a Closed System_a.doc

Page 1 / 2

2.3 Basic Settings (parallel to cooking programmes)

2.3.3 Demoisturizing in a Closed System (Crisp & Tasty)

1 = Oven drain 2 = Oven floor 3 = Solenoid valve Demoisturizing Y2 4 = Water inlet Demoisturizing 5 = Injection nozzle Demoisturizing 6 = Cover Demoisturizing tub

7 = Demoisturizing tub 8 = Control module (SM) 9 = Condenser 10 = Condenser over flow 11 = Condenser outlet

Information: The oven atmosphere can be demoisturized in the convection and Super Heated Steam cooking programmes by way of the demoisturizing tub. The solenoid valve Y2 3 opens and via the demoisturizing nozzle 5 cold water is sprayed into the demoisturizing tub 7. The cover 6 for the demoisturizing tub prevents water from spraying into the oven. The injected water flows through the condenser 9 and out of the unit.

i


KD / 01.09.2004 2_03_03e_Demoisturizing in a Closed System_a.doc

Page 2 / 2

Information Functioning principle of Demoisturization: The injection of water creates a cold water curtain, a) on which the oven atmosphere moisture can condensate, b) then according to the Venturi Prinziple, the moisture from the oven is suctioned out and re-condensed into water c) that the cover 6 of the demoisturizing tub 7 cools, so that this additional steam condensation, d) additionally cools the condenser 9 water.

Information:

Demoisturization is selected in the Mr. C. Menu in 3 steps ( light, middle,

full). In steps "light" and "middle", demoisturization will continue until the

preselected Bypass value is reached. In step "full", demoisturizing runs

continuously. When demoisturizing is activated, the steam generator heating / steam generator burner remains switched off. The Convectioin heating / Convection burner is switched on as needed. The demoisturizing can be saved at the end of the recipe in the cookbook. Thereby shortly before the cooking programme ends, the released moisture when opening the door will be reduced and the kitchen atmosphere relieved.

Check: Noise, water flowing out of the drain

Cross Reference: Service Handbook 6.11 "Condenser removal and assembly Service Handbook 5. Trouble shooting and Error Codes Electronic

i

i


KD / 01.09.2004 2_03_04e_Steam generator draining and rinsing_a.doc

Page 1 / 2

2.3 Basic settings

2.3.4 Steam generator draining and rinsing

1 = Steam generator 8 Water level probe 2 = Steam generator heating / heat exchanger 9 Steam generator probe B4 3 = Condenser 10 Cooling hose 4 = Water inlet Condenser cooling 11 Water inlet Steam generator 5 = Condenser probe B3 filling 6 = Steam generator draining pump 12 Back flow protection 7 = Pump hose 13 Steam exhaust vents

14 Control module (SM)

Information: If the controls note a date change between the last switching OFF and ON

again or the unit goes into a STOP position after 24 hours of non-stop operation, the automatic steam generator rinsing is called up. For 10 seconds on the display a choice lights up as to whether the steam generator rinsing should be performed or not. If this is not switched from YES to NO within the 10 seconds, the procedure will begin. The steam generator will be drained, rinsed and then refilled and heated. This process depending on the size of the unit will last up to 5 minuntes. The unit is then again in standby mode.

i


KD / 01.09.2004 2_03_04e_Steam generator draining and rinsing_a.doc

Page 2 / 2

Check: Noise, Water flowing out of the drain

Notice: If the pumping circulation is not performed correctly, the unit will go into error

operation via Error code E34. Before that, the pump will attempt through cyclic work (shaking cycles) to correct the cause of the error (to shake the pump free).

In order to prevent the drain water temperature that is set in the Service programme from being exceeded, the steam generator is pumped out in cycles. Thereby the water will be pumped out to the level of the water level probe and then afterwards the steam generator will be filled again, until the steam generator probe B4 the outgoing water temperature setting value on the controls is registered. Then the steam generator will be completely emptied.

When the steam generator is empty, water will be repeatedly injected and pumped out in order to rinse lime from the steam generator (pendulum rinsing).

If when the automatic steam generator rinsing is being performed and water is coming out of the unit over flow, this means that either the customer provided drain is blocked or it is too small.

During the steam generator rinsing process, the condenser cooling process can also be activated.

Principle outline:

1 = Water level probe 2 = Steam generator 3 = Steam generator probe B4 4 = Pump for steam generator draining 5 = Condenser 6 = Unit drain 7 = Condenser probe B3 8 = Unit over flow 9 = Water inlet Steam generator filling 10 = Ventilation section 11 = Back flow protection with water filling

of steam generator 12 = Steam exhaust vents

Cross reference: Service Handbook 6.11 "Condenser removal and assembly Service Handbook 5. "Trouble shooting and Error Codes Electronic" Service Handbook 4.2 " Automatic flushing of the steam generator"


KD / 02.08.2005 2_03_05e_Automatic Cleaning_b.doc

Page 1 / 2

2.3 Basic Settings

2.3.5 Automatic Cleaning (optional)

1 = Suction panel 7 Injection nozzle Cleaner2 = Cleaning pipes 8 Injection nozzle Water3 = Sprinkler Nozzle Water 9 Pumping box (under the unit)4 = Rotor Nozzle Cleaner5 = Water pipes 6 = Additional Water pipes (only in X.20-units)

Information: The time duration of the automatic cleaning is dependent on which cleaning

step is selected and can last anywhere from 41 minutes (Step 1) to~ 2 h (Step 4+).

After the automatic cleaning is finished, the buzzer sounds for 10 minutes and afterwards the unit switches itself off (Stand by-operation).

Check: Noise, Water flowing out of drain

i


KD / 02.08.2005 2_03_05e_Automatic Cleaning_b.doc

Page 2 / 2

Information Automatic Cleaning process:In automatic cleaning, various processes in the unit are called up/applied. This is why it is an optimal time to check all operations in the units, as to whether all the processes are functioning freely. 1. Check: Is the water tap open/water level regulation functioning?

In units with a steam generator, the steam generator is emptied by the steam generator pump until the lowest water level probe is reached and then refilled.

In units with direct injection, the solenoid valve Y4 is opened and the pressure switch S1 checks if water pressure exists.

2. Drying and demoisturizing oven ( In Gas units, this step takes longer than in electric units, because the heat exchanger pipes must be cooled before the cleaner can be injected).

3. Cleaner injection.4. Working time with changing fan directions (for optimal distribution of cleaner)

and various Stop phases ( In units with steam generator an additional 10 min. Steaming at 100C).

5. Short water blasts from the cleaning system water nozzles.6. Flushing cleaner: Water from the water nozzles flushes the cleaner thoroughly

and intensively from the oven. During this phase, the cleaner pipes and nozzles are rinsed clean with CONVOCare (neutralized).

7. Steam generator flushing and condenser flushing.8. Steam disinfection: 5 Min. Steaming at 100C9. Sterilization (can be selected in Service programme c20) 10 Min. Convection

at 200C.

Information: In the cleaning steps 2, 3 and 4, before step 7 the steps 2-6 are repeated in

order to achieve an intensive cleaning. In step 4+ shine after step 6 as intermediate step CONVOCare is injected and

flushed out again followed by steps 7, 8 and possibly 9 (This creates an additional luster).

Cross reference: Service Handbook 2.3.6 Water Flow plan Service Handbook 4.3 Cleaning the unit Service Handbook 5. Trouble shooting and Error Codes Electronic

i

i


KD / 01.09.2004 2_03_06e_Water Flow plan_a.doc

Page 1 / 2

2.3 Basic Settings

2.3.6 Water Flow plan

1 = Injection nozzle Water (CONVOClean

system) 2 = Injection nozzle Cleaner (CONVOClean

system) 3 = Pressure compensation valve (Low pressure

protection) 4 = Rotor nozzle cleaner (CONVOClean system) 5 = Sprinkler nozzle Water (CONVOClean

system) 6 = Oven chamber 7 = Pressure switch CONVOClean system (S2) 8 = Hose connection pumps pressure side 9 = Pump CONVOCare (Y20) 10 = Cleaner pumps (Y22 / Y23) 11 = Hose connection green CONVOCare-pump

suction side 12 = Hose connection red cleaner-pump suction side 13 = Cannister Cleaning solution CONVOClean 14 = Cannister Nozzle spray solution CONVOCare 15 = Convection heating / heat exchanger 16 = Cover Demoisturizing tub 17 = Fan

18 = Suction panel 19 = Condenser 20 = Demoisturizing nozzle 21 = Demoisturizing tub 22 = Bypass pipe 23 = Condenser cooling nozzle 24 = Condenser drain 25 = Condenser over flow 26 = Water connection B (hard water) 27 = Solenoid valve with Flow quantity limiter 28 = Water connection A ( Soft water) 29 = Hand shower 30 = Hand shower hose 31 = Stop valve Hand shower 32 = Back flow protection with nozzle Steam

generator filling 33 = Ventilation pipe 34 = Water level probe (B1 - bl/rd) 35 = Steam generator 36 = Steam generator heating / heat exchanger 37 = Steam generator Draining pump (M4)

Unit with steam generator


KD / 01.09.2004 2_03_06e_Water Flow plan_a.doc

Page 2 / 2

1 = Injection nozzle Water (CONVOClean

system) 2 = Injection nozzle Cleaner (CONVOClean

system) 3 = Pressure compensation valve (Low

pressure protection) 4 = Rotor nozzle Cleaner (CONVOClean

system) 5 = Sprinkler nozzle Water (CONVOClean

system) 6 = Oven chamber 7 = Pressure switch CONVOClean system (S2) 8 = Hose connection pumps pressure side 9 = Pump CONVOCare (Y20) 10 = Cleaner pump (Y22 / Y23) 11 = Hose connection green CONVOCare-pump

suction side 12 = Hose connection red Cleaner-pump suction

side 13 = Cannister cleaning solution CONVOClean 14 = Cannister Nozzle spray solution

CONVOCare 15 = Oven drain 16 = Convection heating / heat exchanger 17 = Fan

18 = Suction panel 19 = Condenser 20 = Demoisturizing nozzle 21 = Demoisturizing tub 22 = Bypass pipe 23 = Condenser cooling nozzle 24 = Condenser drain 25 = Condenser over flow 26 = Water connection B (hard water) 27 = Solenoid valve with Flow quantity limiter 28 = Water connection A ( Soft water) 29 = Hand shower 30 = Hand shower hose 31 = Stop valve Hand shower 32 = Water inlet direct injection 33 = Ventilation pipe 34 = Reducer nozzle 35 = Pressure switch injection 36 = Manometer injection 37 = Pressure regulator 38 = Water injection distributor 39 = Nozzle injection

Unit with direct injection


KD / 01.09.2004 2_04_01e_Door safety switch and Motor break_a.doc

Page 1 / 2

2.4 Safety Settings (parallel to cooking programmes)

2.4.1 Door safety switch and Motor break

1 = Control module SM 2 = Fan motor 3 = Convection heat exchanger 4 = Convection heating 5 = Direct injection 6 = Immersion heating unit 7 = Steam generator heat exchanger

8 = Door latch 9 = Door catch 10 = Worm (Door handle locking

mechanism) 11 = Door magnet 12 = Door contact switch

Information: When the door moves from the closed setting [I] (Door latch 8 is vertical) to the airing setting [II] (Door latch 8 is horizontal), the door magnet 11 (in the inner worm 10) removes itself from the door contact switch 12 in the door catch 9. Via the electronic 1 , a contactor through the phase angle rotation breaks the motor (only when the motor has been switched on a minimum of 5 seconds before) and the electric supply to the following processes is interrupted:

Motor 2 with fan (Contactors K5, K50, K55, K56, K57) Convection heating 3 (Contactors K4, K41, K42, K6, K61, K 62) in Electric units Immersion heating element Steam generator 4 (Contactors K1, K2, K3) in

Electric units Convection burner 3 (Automatic firing N20, N22) in Gas units Steam generator burner 5 (Automatic firing N21) in Gas units Solenoid valve Y4 (Water supply to injection 6) in OES and OGS

i


KD / 01.09.2004 2_04_01e_Door safety switch and Motor break_a.doc

Page 2 / 2

Information:

The Steam generator Standby mode and the Condenser cooling are maintained.

After the door is closed, the cooking process resumes automatically again and the relevant processes are switched on.

Safety: Caution Steam ! When opening the oven door, proceed as follows: Turn Door latch to

horizontal position (Airing position). After a few seconds, open the door slowly. Danger of scalding due to steam when the door is quickly opened

Check: When the door latch is in the horizontal position, does the fan stop.

Cross reference: Service Handbook 6.12 Door latch / Door contact switch: installation and

removal

i


KD / 06.09.2004 2_04_02e_Electronic safety switches_a.doc

Page 1 / 3

2.4 Safety settings (parallel to cooking programmes)

2.4.2 Electronic safety switches

Legend to the principle drawings (valid for all units)

1 = Oven lamp 2 = Fan motor 3 = Convection heat exchanger 4 = Convection heating 5 = Direct injection 6 = Steam generator heating 7 = Steam generator heat exchanger 8 = Steam generator pump 9 = Buzzer (on the electronic) 10 = Control module SM

11 = Pressure switch S2 CONVOClean system

12 = Pressure switch S1 of the Direct injection

13 = Fan reverberation sensor 14 = Fan motor Thermo clicker 15 = Automatic firing 16 = Gas module (GM) // = is switched off

Electric units with Steam generator (OEB)

Electric units with Direct injection (OES)



Page 2 / 3

Gas units with Steam generator (OGB)

Gas units with Direct injection (OGS)

Information: The electronic controls 10 / 16 can check the following sources of problems: Low water level in steam generator ( Measuring pin of the water level probe

B1/rd) only in OEB and OGB Motor excess temperature (thermo clicker) 14 Motor defect (measuring revolutions per Minute by the reverberation sensor)

13 only in OGB and OGS Probes B3, B4, B5, B6 and B10 (Ni Cr Ni Thermo element probe) Controls 10 and 16 (Hard- and Software error) Excess temperature immersion heating element 6 and steam generator heat

exchanger 7 (B8 = Ni Cr Ni Thermo element probe)



Page 3 / 3

Service area excess temperature (Controls 10) additional fan switches on

at 45C and off at 41C . On gas units the additional fan runs constantly, when the unit is switched on.

Low water on pressure switch S1 12 of the solenoid valve Y4 (Steam generating through water injection) only in OES and OGS

No pressure on pressure switch S2 11 on the pressure side of the pump for the cleaner and the nozzle rinsing solution in units with the CONVOClean system.

Error code from the automatic firing 15 N20, N21, N22 only in OGB and OGS

Information: When errors or disturbances occur during operation, the unit goes into error operation as follows: The buzzer 9 sounds, All processes (oven lamp 1, fan motor 2, Convection heating 4, Convection

automatic firing 3, Steam generator heating 6, Steam generator automatic firing 7, Steam generator pump 8 and all solenoid valves Y1, Y2, Y3, Y4 (Normal operation) as well as Y20, Y21, Y22, Y23 (CONVOClean system) are switched off.

On the digital display the errors with error codes are shown and an additional error description is given.

After confirming the errors with the "STOP" key, the user can continue working with the Emergency programme.

Check: Buzzer sounds for error codes Error codes and additional error descriptions are displayed

Instructions: With the help of the error code and trouble shooting list (Chapter 5) find and correct error.

Cross reference: Service Handbook Chapter 5. Trouble shooting and Error Codes Electronic

Notice (valid only for OGB and OGS): If a gas unit has more than one burner, the controls for the automatic firing are on the gas module (GM).


KD / 06.09.2004 2_04_03e_Electrical safety switches_a.doc

Page 1 / 2

2.4 Safety switches (parallel to cooking programmes)

2.4.3 Electrical safety switches

1 = Main contactor 2 = Control module (SM) or Gas module (GM) 3 = Steam generator automatic firing N21 4 = Convection automatic firing N20 and

N22

5 = Gas valve Convection burner 6 = Gas valve Steam generator burner

Information: The electronic controls are completed through the following electrical safety switching organs:

Electric units The capillary probe with safety thermostat B7:

switches the main contactor K0 1 off when a critical oven temperature is exceeded (from STB B7 no error code is produced). Thereby all other contactors are switched off. The capillary probe is fastened outside the oven on the unit cover or the side panel (Service area) under the insulation.

Gas units The capillary probe with safety thermostat B7.1:

switches the gas valve in the automatic firing N20 and N22 4 off . Thereby the blowing burner U20 and U22 is no longer supplied with gas and switches off. From STB B7.1 alone, no error code is produced, the error is registered from the automatic firing and sent to the controls The capillary probe is fastened outside the oven on the unit cover or the side panel (Service area) under the insulation.

i

Electric units Gas units


KD / 06.09.2004 2_04_03e_Electrical safety switches_a.doc

Page 2 / 2

The capillary probe with safety thermostat B7.2 (only in OGB):

switches the gas valve in the automatic firing N21 3 off when a critical temperautre in the steam generator is reached. Thereby the blowing burner U2 is no longer supplied with gas and switches off. From STB B7.1 alone, no error code is produced, the error is registered from the automatic firing and sent to the controls. The capillary probe is in the steam generator slid into a pipe above the burner chamber of the steam generator burner. (together with the safety thermostat probe B8).

Check: STB B7 is triggered: Oven is no longer warmed by convection the fan is not

rotating and the steam generator heating doesnt become warm. STB B7.1 is triggered: Error code "No GAS" on Control Display. STB B7.2 is triggered: Error code "No GAS" on control Display.

Cross reference: Service Handbook 5. Trouble shooting and Error Codes Electronic


KD / 01.09.2004 2_05_01e_Steaming at 100C_a.doc

Page 1 / 2


2.5.1a Steaming at 100C in units with steam generator (OEB/OGB)

1 = Pressure compensation valve 2 = Fan wheel 3 = Oven chamber 4 = Steam and air circulation 5 = Bypass pipe 6 = Convection heat exchanger 7 = Demoisturizing tub 8 = Hydraulic seal in condenser 9 = Demoisturizing nozzle 10 = Condenser cooling 11 = Convection heating 12 = Fan motor 13 = Steam generator heating 14 = Steam generator heat exchanger 15 = Back flow protection 16 = Water level probe 17 = Steam generator B1 = Water level probe B3 = Condenser temperature probe B4 = Steam generator temperature probe B5 = Bypass temperature probe B6 = Oven temperature probe B10 =Core temperature probe Y1 = Solenoid valve "condenser cooling" Y2 = Solenoid valve " demoisturizing " Y3 = Solenoid valve steam generator

Information: When steaming, the oven 3 is heated only by means of the water evaporated in the steam generator 17.

The steam generator heating 13 / steam generator burner 14 are controlled by the oven temperature probe B6 and the bypass probe B5.

In electric units, the immersion heating element 13 in the steam generator 17 remains activated via the contactors K1, K2 and K3 until both the probes B5 and B6 have reached their nominal temperatures. After further operation, steam heating 13 is activated when the temperature at the end of the bypass pipe 5 falls below the nominal value (Service programme c07) (steam requirement via the bypass temperature probe B5).

In gas units, the blow burner 14 in the steam generator is ignited via the automatic firing N21 and remains on until both the probes B5 and B6 have reached their nominal temperatures. After further operation, the steam generator burner 14 switches on when the temperature at the end of the bypass pipe falls under the nominal temperature (Service programme c07) (steam requirement via the bypass temperature probe B5).

The motor 12 runs continuously in reverse operation in Steaming via the contactors K5 and K50.

The programme is stopped automatically when the time or the pre-set CTC (Core temperature probe B10 ) temperature is reached.

i

= active in this cooking programme = not active in this cooking programme = can be active


KD / 01.09.2004 2_05_01e_Steaming at 100C_a.doc

Page 2 / 2

2.5.1b Steaming at 100C in units with direct injection (OES/OGS)

1 = Pressure compensation valve 2 = Fan wheel 3 = Oven chamber 4 = Steam and air circulation 5 = Bypass pipe 6 = Convection heat exchanger 7 = Demoisturizing tub 8 = Hydraulic seal in condenser 9 = Demoisturizing nozzle 10 = Condenser cooling 11 = Convection heating 12 = Fan motor 13 = Pressure regulator 14 = Manometer 15 = Pressure switch (water) 16 = Reducer nozzle 17 = Water injection distributor 18 = Injection nozzle B3 = Condenser temperature probe B5 = Bypass temperature probe B6 = Oven temperature probe B10 = Core temperature probe Y1 = Solenoid valve "condenser cooling " Y2 = Solenoid valve " demoisturizing " Y4 = Solenoid valve direct injection

Information: In Steaming, the oven 3 is heated via the convection heating 11 / the convection heat exchanger 6. To generate steam, water is sprayed into the fan wheel 2 via the injection nozzle 18 and the water injection distributor 17, through the centrifugel force it is flung outwards and evaporates on the hot surface. The switching on and off of the convection heating 11 / convection burner 6 is controlled by the oven temperature probe B6, which switches the heating / burner on when the temperature falls below the nominal temperature. The generating of steam is controlled by the bypass temperature probe B5. The injection of water into the fan wheel 2 remains switched on via the solenoid valve Y4 until the bypass temperature probe B5 has reached its nominal temperature (Steam saturation). After further operation, the injection (solenoid valve Y4) switches on when the temperature on the end of the bypass pipe 5 falls below the nominal temperature (steam requirement via the bypass temperature probe B5).

The motor 12 runs continuously in reverse operation in Steaming via the contactors K5 and K50.


i

= active in this cooking programme = not active in this programme = can be active


KD / 01.09.2004 2_05_02e_Steaming under 100C_a.doc

Page 1 / 2


2.5.2a Steaming under 100C in units with steam generator (OEB/OGB)

1 = Pressure compensation valve 2 = Fan wheel 3 = Oven chamber 4 = Steam and air circulation 5 = Bypass pipe 6 = Convection heat exchanger 7 = Demoisturizing tub 8 = Hydraulic seal in condenser 9 = Demoisturizing nozzle 10 = Condenser cooling 11 = Convection heating 12 = Fan motor 13 = Steam generator heating 14 = Steam generator heat

exchanger 15 = Back flow protection 16 = Water level probe 17 = Steam generator B1 = Water level probe B3 = Condenser temperature probe B4 = Steam generator temperature

probe B5 = Bypass temperature probe B6 = Oven temperature probe B10 =Core temperature probe Y1 = Solenoid valve "condenser cooling" Y2 = Solenoid valve " demoisturizing " Y3 = Solenoid valve steam generator

Information: In this temperature range the oven 3, as in Steaming at 100C, is heated only by means of the water evaporated in the steam generator 17 .

In electric units, the steam generator heating 13 is controlled via the oven temperature probe B6. 2 C before reaching the nominal temperature, K1 switches a part of the heating off. Via K2 and K3 the oven is further heated with reduced heating until the set nominal temperature is reached

In gas units, the steam generator burner 14 is also controlled only via the oven temperature probe B6.

In this programme, the fan motor 12 will be pulsed within a pre-set temperature of 30 - 99 C via contactors K5 and K50 (reverse operation) With a constant activation time of the fan 12 (normally 2 seconds) the length of the pause can be extended from the default value of 60 seconds to 240 seconds depending on the oven temperature.


i



KD / 01.09.2004 2_05_02e_Steaming under 100C_a.doc

Page 2 / 2

2.5.2b Steaming under 100C in units with direct injection (OES/OGS)


Information: In Steaming under 100C, the oven 3 is heated via the convection heating 11/ the convection burner.6. To generate steam, water is sprayed into the fan wheel 2 via the injection nozzle 18 and the ball spray distributor 17, through the centrifugel force it is flung outwards and evaporates on the hot surface.

The switching on and off of the convection heating 11 / convection burner 6 is controlled by the oven temperature probe B6, which switches the heating / burner on when the temperature falls below the nominal temperature. At the same time that it is heating up, the direct injection can be active. To generate steam, water is sprayed onto the fan wheel 2 via the injection nozzle 18 and the Water injection distributor 17, the centrifugal force flings it outwards and it evaporates on the hot surface. After further operation the injection via the solenoid valve Y4 remains switched on until the set selected value on the bypass probe B5 is reached.

The motor 12 runs continuously in reverse operation in Steaming under 100C via the contactors K5 and K50. The programme is stopped automatically when the time or the pre-set CTC (Core temperature probe B10 ) temperature is reached.

i



KD / 01.09.2004 2_05_03e_Superheated Steam and Steaming over 100C_a.doc

Page 1 / 3


2.5.3a Superheated Steam and Steaming over 100C in units with steam generator (OEB/OGB)


Information:

The superh

The Superheated steam programme is a combined cooking programme in which steam is fed in at the beginning until the saturation limit is reached, and is then superheated when the convection heater automatically activates. After selection of the programme, steam generator heating 13 is activated via contactors K1, K2 and K3 and in gas units the steam generator burner 14 is activated via the automatic firing N21, until the bypass temperature (bypass temperature probe B5 at the end of the bypass pipe 5) reaches the nominal temperature (Service programme c08). The convection heating 11 / convection heat exchanger 6 then continues to heat until the oven probe B6 reports to the electronic circuitry that the pre-set temperature has been reached. Even when the heaters are then added, the steam generator heating 13 / steam generator burner 14 have priority over convection heating 11 / convection burner 6.

The motor 12 runs continuously in reverse operation in this programme via the contactors K5 and K50. The programme is stopped automatically when the time or the pre-set CTC (Core temperature probe B10 ) temperature is reached.

i




Page 2 / 3

Information: The Steaming over 100C mode differs from the Superheated steam programme only by virtue of its restricted nominal temperature range from 101 - 120 C. In comparison with normal steaming, more intensive cooking occurs due to the higher steam temperature. The bypass nominal value in Quick steaming is set separately in Service programme c09. When in the Superheated steam programme the demoisturizing 9 is activated, then the steam injection (controlled via the bypass probe) is depressed until the demoisturizing 9 is shut off again.

i



Page 3 / 3

2.5.3b Superheated Steam and Steam over 100C in units with direct injection (OES/OGS)


Information: The Superheated programme is a combined cooking programme, in which the oven is heated by the convection heating 11 / convection burner 6 and at the same time water is injected into the steam generator. After the saturation level is reached, the steam is super heated by the convection heating / heat exchanger.

After selecting the programme, the convection heating 11 is activated via the contactors K4, K41, K42, K6, K61 and K62 (as far as available) and in gas units the convection burner 6 is activated via the automatic firing N21/N22, until the oven probe B6 reports to the electronic circuitry that the nominal temperature has been reached. In order to control the injection, the bypass temperature probe B5 is fastened onto the bypass pipe 5. The solenoid valve Y4 remains activated until the bypass temperature, the nominal value (Service programme c08) has been reached.

The motor 12 runs continuously in reverse operation in this programme via the contactors K5 and K50.


Notice: For quick steaming and demoisturizing, follow the same instructions as in units with steam generator (see 2.5.3a Page 2).

i



KD / 01.09.2004 2_05_04e_Convection_a.doc

Page 1 / 2


2.5.4a Convection in units with steam generator (OEB/OGB)


Information: In the convection programme, the oven is heated only via the convection heating 11 / convection heat exchanger 6. Activating and deactivating of the heating / the burner is controlled by the oven temperature probe B6, this activates the convection heating 11 via K4 and K6, whenever the temperature drops below the preset temperature. In gas units, the activating and deactivating of the convection burner 6 is controlled by the automatic firing N20 / N22.

The fan motor 12 will switch on and off in this programme via the K5 and K50 in the selected temperature value range of 30 C - 99 C in pulse. With a constant activation time of the fan (normally 2 seconds), the pause time can be extended from the default value of 60 seconds to 240 seconds, depending on the oven temperature.


In the convection programme, the demoisturizing 9 can be activated.

Information: Preheat programme Mr. C can call up a special preheating programme on the menu. In this programme, the selected preheating temperature will be reached with convection heating. The timer begins running after the selected temperature has been reached. Thereby maintaining a continuous and even preheating, independent of the starting conditions.

i

i



KD / 01.09.2004 2_05_04e_Convection_a.doc

Page 2 / 2

2.5.4b Convection in units with direct injection (OES/OGS)


Information: In the convection programme, the oven is heated only via the convection heating 11 / convection heat exchanger 6. Activating and deactivating of the heating / the burner is controlled by the oven temperature probe B6, this activates the convection heating 11 via K4 and K6, whenever the temperature drops below the preset temperature. In gas units, the activating and deactivating of the convection burner 6 is controlled by the automatic firing N20 / N22.

The fan motor 12 will switch on and off in this programme via the K5 and K50 in the selected temperature value range of 30 C - 99 C in pulse. With a constant activation time of the fan (normally 2 seconds), the pause time can be extended from the default value of 60 seconds to 240 seconds, depending on the oven temperature.


In the convection programme, the demoisturizing 9 can be activated.

Information: Preheat programme Mr. C can call up a special preheating programme on the menu. In this programme, the selected preheating temperature will be reached with convection heating. The timer begins running after the selected temperature has been reached. Thereby maintaining a continuous and even preheating, independent of the starting conditions.

i

i


Servicehandbuch OEB/OES/OGB/OGS

KD / 20.10.2004 2_05_05e_Regeneration_b.doc

Page 1 / 2


2.5.5a Regeneration in units with steam generator (OEB/OGB)

1 = Pressure compensation valve2 = Fan wheel3 = Oven chamber4 = Steam and air circulation5 = Bypass pipe6 = Convection heat exchanger7 = Demoisturizing tub8 = Hydraulic seal in condenser9 = Demoisturizing nozzle10 = Condenser cooling11 = Convection heating12 = Fan motor13 = Steam generator heating14 = Steam generator heat exchanger15 = Back flow protection16 = Water level probe17 = Steam generatorB1 = Water level probeB3 = Condenser temperature probeB4 = Steam generator temperature probeB5 = Bypass temperature probeB6 = Oven temperature probeB10 =Core temperature probeY1 = Solenoid valve "condenser cooling"Y2 = Solenoid valve " demoisturizing "Y3 = Solenoid valve steam generator

Information:Similar to Superheated steaming, regenerating consists of a combination of feeding steam into the oven and superheating the steam with the convection heating 11 / convection heat exchanger 6. In Regeneration, the goal for an optimal oven climate dependent on the bypass sensitivity to the unit load is self determined.

After regenerating is started, the steam generator heating 13 / steam generator burner 14 is activated and the unit regulates automatically the optimal bypass temerature for regenerating (range 55 - 90C). The steam generator heating 13 /steam generator burner14 remain activated until the bypass temperature probe B5 at the end of the bypass pipe 5 has reached the nominal temperature. In this programme, the convection heating 11 / convection burner 6 can be switched on for a short period of time, even though the regulated bypass set value is not yet reached. The moisture levels can be adjusted in the Service programme c10.

After reaching the bypass selected temperature, the convection heating 11 / convection burner 6 heat until the oven temperature probe B6 reports reaching the preselected oven temperature to the electronic circuitry.

The fan motor 12 runs continuously in this programme via the contactors K5 and K50 in reverse.


i

= active in this cooking programme= not active in this cooking programme= can be active

Servicehandbuch OEB/OES/OGB/OGS

KD / 20.10.2004 2_05_05e_Regeneration_b.doc

Page 2 / 2

2.5.5b Regeneration in units with direct injection (OES/OGS)

1 = Pressure compensation valve2 = Fan wheel3 = Oven chamber4 = Steam and air circulation5 = Bypass pipe6 = Convection heat exchanger7 = Demoisturizing tub8 = Hydraulic seal in condenser9 = Demoisturizing nozzle10 = Condenser cooling11 = Convection heating12 = Fan motor13 = Pressure regulator14 = Manometer15 = Pressure switch (water)16 = Reducer nozzle17 = Water injection distributor18 = Injection nozzleB3 = Condenser temperature probeB5 = Bypass temperature probeB6 = Oven temperature probeB10 = Core temperature probeY1 = Solenoid valve "condenser cooling "Y2 = Solenoid valve " demoisturizing "Y4 = Solenoid valve direct injection

Information:Regeneration is similar to Superheated steaming, a combination of water injection, steam generation and steam superheating via the hot surface of the convection heating 11 / convection heat exchanger 6. In Regeneration, the goal for an optimal oven climate dependent on the bypass sensitivity to the unit load is self determined.

After selecting the programme, the convection heating 11 is activated via the contactors K4, K41, K42, K6, K61 and K62 (as far as available), in gas units the convection burner 6 is activated via the automatic firing N20 / N22, until the oven probe B6 reports reaching the adjusted nominal temperature to the electronic circuitry.Parallel to this to control the injection via the solenoid valve Y4, the bypass temperature probe B5 on the end of the "bypass pipe" 5 is employed.After the cooking programme is started, the optimal bypass nominal temperature is regulated and the solenoid valve Y4 (water injection) remains switched on until the bypass temperature probe B5 reaches its selected value. The moisture levels can be adjusted in the Service programme c10.

The fan motor 12 runs continuously in this programme via the contactors K5 and K50 in reverse.


i

= active in this cooking programme= not active in this programme= can be active


KD / 01.09.2004 2_05_06e_Delta-T cooking_a.doc

Seite 1 / 1


2.5.6 Delta-T cooking

DT = Difference between oven temperature and core temperature

Information: With Delta-T cooking it is necessary to work closely with the core temperature because the oven temperature is dependent on a gradually increasing core temperature. The oven temperature will always be as high as the combination of the selected Delta-T temperature and the core temperature. When a programme with Delta-T cooking is started on the oven, the display will indicate the set Delta temperature and the actual core temperature. The Delta temperature is indicated by the "DT" symbol on the display. The Delta-T programme only operates in the convection programme. When the selected core temperature is reached, the cooking programme will switch off or automatically switch to the next step. In this programme, it is possible that the fan motor will begin switching on and off (pulsing). In units with direct injection OES & OGS the core temperature probe is optional.

i

Start cooking programme Set core temperature reached


KD / 01.09.2004 2_05_07e_Cook & Hold_a.doc

Page 1 / 1


2.5.7 Cook & Hold

Information: The Cook & Hold programme consists of 2 cooking phases: In the Cook Phase, the meat is gently cooked in convection or superheated steam. When finished, it is then held warm for hours in the unit always maintaining its peak quality. In a programme with Cook & Hold, the Cook phase will automatically switch over to the Hold phase when the selected core temperature is reached. The selected values must be set in a way so that the oven temperature and the actual core temperature meet the Hold temperature (= end core temperature) so that the meat does not continue to cook. In the Hold phase, the display will indicate the adjusted Hold temperature (inverse) after pressing the temperature key. The actual oven temperature is not shown inverse. The Hold temperature is additionally indicated with "c&h" on the display. During the Hold phase, the fan motor will switch on and off and the timer is automatically set on continuous, other than this, the cooking algorithmus is that of the convection prgoramme.

In units with direct injection OES & OGS the Core temperature probe is optional.

Start max. Warm- hold time

i

Switching from Cook to Hold by swtiching core temperature

Serve ready

Cook-Phase Hold-Phase

Maturing Stop

Selected End-core temp = Hold temp

Oven preheated


KD / 15.06.2005 2_05_08e_Overview Chart_ab.doc

Page 1 / 2

2.5 Functioning of the cooking programms

2.5.8a Overview Chart: Processes and probes in units with steam generator

2 = Fan Wheel6 = Convection heat exchanger11 =Convection heating12 =Fan motor13 =Steam generator heating14 =Steam generator heat exchanger

Con

vect

ion

heat

ing/

C

onve

ctio

n bu

rner

SG

hea

ting

K1

K2/

K3

(onl

y in

OE

B)

Ste

am g

ener

ator

-B

urne

r (o

nly

in O

GB

Sol

enoi

d va

lve

Y1/

Y3

Fan

puls

ing

poss

ible

Ove

n pr

obe

B6

Byp

ass

prob

e B

5

Ste

am g

ener

ator

pr

obe

B4

Con

dens

er p

robe

B3

CTC

pro

be B

10

Sol

enoi

d va

lve

Y2

Steaming at 100C

x x x (x) x

Steaming under 100C

x x x x x

Super steaming

x x x x x x x

Steaming over 100C

x x x x x x

Convection x - - x x xRegene-

rationx - x x x x

Active at switch-off criteria

core temp.

T-cooking x - -

Always active

Y1: due to con-denser rinsing

Y3: due to steam

generator filling x x active * x

Cook Per cooking programme in Cook-Phase *2 *5

Hold x - - As above x x *3 xPreheating x - - As above x x

Always active due to steam generator standby

Always active due

to condenser cooling

*4 x

* T cooking operates only with CTC.*2 active at switch-off criteria core temperature

*3 not active, because automatic switch-off criteria Time = Continuous.

*4 not active, because automatic switch-off criteria Time*5 active with demoisturizing

Cross Reference: Service Handbook 5. Trouble shooting and Error codes Electronic


KD / 15.06.2005 2_05_08e_Overview Chart_ab.doc

Page 2 / 2

2.5.8b Overview Chart: Processes and Probes in units with direct injection

2 = Fan wheel6 = Convection heat exchanger11 =Convection heating12 =Fan motor17 = Injection

Con

vect

ion

heat

ing/

C

onve

ctio

n bu

rner

Inje

ctio

n

Sol

enoi

d va

lve

Y4

Sol

enoi

d va

lve

Y1

Fan

puls

ing

poss

ible

Ove

n pr

obe

B6

Byp

ass

prob

e B

5

Con

dens

er p

robe

B

3

CTC

pro

be B

10(O

ptio

n)

Sol

enoi

d va

lve

Y2

Steaming at 100C

x x x

Steaming under 100C

x x x

Convec-tion x x x x x

Steaming over 100C

x x x x

Convection x x x x

Regene-ration

x x x x

Active at switch-off

criteria core temp

T cooking x

Always active due

to condenser

rinsing

x x active * x

Cook Per cooking programme in Cook-Phase *2 *5

Hold x As above x x *3 x

Preheating x As above x x

Always active due

to condenser

rinsing

*4 x

* T cooking operates only with CTC.*2 active at switch-off criteria core temperature

*3 not active, because automatic switch-off criteria Time = Continuous.*4 not active, because automatic switch-off criteria Time*5 active with demoisturizing

The cooking programmes T cooking and Cook&Hold are only possible with option core temperature probe (CTC).



KD / 06.09.2004 2_06e_Gas technology_a.doc

Page 1 / 3

2.6 Gas technology

2.6.1 Features

Information: Advanced high performance blower burner

- New burner for the convection heat exchanger and the steam generator heat exchanger

- 100 % pre-mixed combustion gas in burner - High safety standards

High performance abilities - Even cooking results and cooking duration as on electric units. - High effectiveness of the convection heat exchanger (85 - 90%) - High effectiveness of the steam generator heat exchanger (85 - 90%)

Lowest emissions: - CO < 100 ppm - NOx < 40 ppm - Low noise burner system

Simple maintenance / simple installation: - The installation and conversion to another gas type can be performed

without any great technical expenditure.

Gas technology module components (component case principle) - Same burner and same gas hoses for steam generator and convection heat

exchanger. - Easy exchange of the heat exchanger pipes

i



Page 2 / 3

2.6.2 Description of components

Information: Burner (tube) The knitted metal fiber material is welded onto a metallic tube, which makes possible a closed burner structure, without the use of complex fittings. The metallic character of the burner supports flame recognition and makes it considerably more robust / reliable than the usual ceramic burner system.

Information: Gas valve 1:1 Gas-Air Modulating system Technical specifications:

- Optimal Gas-Air mixture in blower: At all speeds, the optimal gas amount is suctioned.

- Connection pressure variations are no problem - Piggy-back System (this means that the fire automat is assembled onto the

gas valve).

Information: Additional components Self-ignition: ignition through hot surfaces. Flame recognition: Ionization principle High performance blowers: Brushless wound high performance commutator-

direct current motor with 4 pole permanent magnet rotor.

i

i

i



Page 3 / 3

The high performance blower is constructively dimensioned for more than 6000 r.p.m. The blower speed is electronically regulated via a PWM input signal. The return check is over the Hall sensor on the high performance blower. This system makes possible regulating the exact speed and is for this reason adapted for modulation processes.

2.6.3 Venturi-High performance burner system

Information: Description of the burner principle The CONVOTHERM Venturi-High performance burner system is dependent on the speed of the blower motors, based on the Venturi principle, the correct amount of gas is suctioned via the gas valve. The gas-air mixture is pressed via the blower into the burner tube where the mixture from the Self-ignition is ignited. It ignites between the burner tube and the burner chamber of the heat exchanger.

Information: Description of the safety principle When a cooking programme is started, a request for heat is made by the controls to the firing automat. At the same time, a signal is activated (PWM) from the controls for the blower motor with a definite speed (from the IDM module). Thereby, according to the Venturi-Principle, low pressure in the suction pipe is produced. After a determined time, the controls will check whether the predetermined speed has been reached. If that is the case, then the Self-ignition is activated and the firing automat opens the gas valve. The gas is suctioned from the blower and pressured into the burner chamber, where it is ignited by the Self-ignition. The Ionization pin in the burner chamber reports to the firing automat, that a correct flame is present. And the firing automat passes this information on to the controls. If a safety requirement is not achieved, the unit goes into error operation. In the display, the error code E05.(1-9) is indicated.

i

i


KD / 02.08.2005 3_01e_Customer Service-Service programme_c.doc

Page 1 / 6

3.1 Customer Service Service programme

Information:The units electronic control board offers the possibility of calling up various internal programme parameters and operating states in order to detect possible faults.

Attention: Any changes on the parameters in the Service programme, other than the

normal work adjustments (default values), could cause operation malfunctions.

When performing a Hard-Reset via co6, the optimal values e.g. on gas units the burner speed, will return to the default values. These values have to be adjusted to optimised values later see label on the left unit site.

A Software-Reset can be performed at any time: press the ON/OFF key for 5 seconds. The Software-Reset should be performed after changes in the Service Programme or after replacing the controls. This will not change any optimised values.

Instructions: Calling-up Customer Service programme

1. Switch unit on with the key.2. Press Service programme key 1 on the back side of the control module 2 or

press , and at the same time and hold for 3 seconds.3. The display now shows the service number and the affiliated service value

and a short explanation. The service number is selected on the display, this means that it is shown inverse.

4. By turning the adjustable knob, various service numbers can be called-up. 5. With the Scroll key, the service number and the service value can be

alternately shown (only with control and diagnose values). 6. If the service value is selected (inverse), it can be adjusted with the adjustable

knob. The changed service value is first taken over by the controls when the service number springs back via the Scroll left key.

7. The included service list gives comprehensive information about the meanings of the service numbers, the maximum and minimum adjustable values, the default values (standard setting) as well as the corresponding specifics.

8. Press the Service programme key 1 or the key in order to leave Customer Serivce.

i



Page 2 / 6

Advice:The first letter of the service numbers indicate the following: r-- = read value only for reading c-- = control value for reading and writing (functions parameter) d-- = diagnose value for detecting errors and checking functions


Ser

vice

No

.:

Des

crip

tion

Co

nta

cto

r

Pin

OE

BO

ES

OG

BO

GS

Min

imu

m

Ad

just

ed

Max

imu

m

Ad

just

ed

Def

ault

val

ue

Sp

ecif

ics

Co

mm

ents

r01 CTC 1 X16 2+6 C Current temperaturer02 CTC 2 X16 3+6 C Current temperature

r03 CTC 3 X16 4+6 C Current temperaturer04 CTC 4 X16 5+6 C Current temperaturer05 Oven-temp. X16 7+8 C Current temperature

r06 Bypass-temp. X16 9+10 C Current temperaturer07 Cond.-temp. X16 11+12 C Current temperature

r08 Steamgen. temp. X17 1+2 C Current temperaturer09 STB-temp. (=savety thermostat) X17 3+4 C Current temperaturer10 free

r11 free

r12 free

r13electronic-temp. (probe can be found on the electronic)

C Current temperature

r14 Ident gas 1 Saved in IDMr15 Ident elektro 1 Saved in IDMr16 free

r17 free

r18 Agent pressure

X15 6+7 Pressure switch S2 CONVOClean system1 = pressure available

r19 free

r20 Lower levelX15 2 0 = Level not reached

1 = Level reached

r21 Upper levelX15 1 0 = Level not reached

1 = Level reached

r22 Thermo protection motor X11 1+2 not in Single Phase

r23 Door switchX15 4+5 0 = door open

1 = door closed

r24 free

r25 free



Page 3 / 6

Ser

vice

No

.:

Des

crip

tion

Co

nta

cto

r

Pin

OE

BO

ES

OG

BO

GS

Min

imu

m

Ad

just

ed

Max

imu

m

Ad

just

ed

Def

ault

val

ue

Sp

ecif

ics

Co

mm

ents

r26 free

r27 free

r28 free

r29 Software BM

r30 Software SM

r31 free

r32 free

r33 free

r34 free

r35 free

r36 free

r37 free

r38 Errors (last error codes) with Scroll key, call-up

the last 10 error codes

r39 Device no.

r40 Part no.

c01 Nom. standby temp. 50 95 88 Cc02 Nom. cond. temp. 50 95 68 Cc03 Fan on cycle 1 20 2 sc04 Fan off cycle 0 90 60 s

c05 Cont. steam 0 1 0 00 = regulated

01 = continuous steam

c06 Hard-Reset 0 1 0 01 = All modules (BM,

SM, KM) are initialized

c07 Humidity S (Steam) 50 95 87 Cc08 Humidity SS (Super steam) 50 96 90 Cc09 Humidity Quick 50 96 90 Cc10 Humidity Reg 5 20 12 Cc11 free - - -

c12 Bitfield1 - - - only CONVOTHERM

internal

c13 Bitfield2 - - - only CONVOTHERM

internal

c14 Option1 - - - Not usedc15 Option2 - - - Not usedc16 Restart time h 0 48 0 hc17 Restart time min 0 59 15 minc18 No. of ingnition 1 5 2c19 PIN 0 999 001c20 Sterilize 0 1 0c21 Shining from level 1 4 4c22 Agent dosage 3 15 5 s

c23 Runtime right 20 250 120 s only CONVOTHERM

internal



Page 4 / 6

Ser

vice

No

.:

Des

crip

tion

Co

nta

cto

r

Pin

OE

BO

ES

OG

BO

GS

Min

imu

m

Ad

just

ed

Max

imu

m

Ad

just

ed

Def

ault

val

ue

Sp

ecif

ics

Co

mm

ents

c24 Runtime left 20 250 120 s only CONVOTHERM

internal

c25 Reverse wait time 0 250 15 s only CONVOTHERM

internal

c26 HL Nmin (HL=Convection) 1000 9000 1000 rpm only CONVOTHERM

internal

c27 HL Nmax (HL=Convection) 1000 9000 7000 rpm only CONVOTHERM

internal

c28 HL Nstart (HL=Convection) 1000 9000 3000 rpm only CONVOTHERM

internal

c29 HL-safety-Time 0 255 6 s only CONVOTHERM

internal

c30 HL-forerun time 0 255 0 s only CONVOTHERM

internal

c31 HL1 actual rpm - - - rpm only for reading value

c32 HL1 PWM (HL=Convection) - - - % only CONVOTHERM

internal

c33 HL1 (HL=Convection) - - - HFAR*

c34 HL2 actual rpm - - - only for reading value

c35 HL2 PWM (HL=Convection) - - - only CONVOTHERM

internal

c36 HL2 (HL=Convection) - - - HFAR*

c37DE Nmin blower (DE=Steam generator)

1000 9000 1000 rpm only CONVOTHERM internal

c38DE Nmax blower (DE=Steam generator)


c39DE Nstart blower(DE=Steam generator)


c40DE-safety-Time(DE=Steam generator)

0 255 10 s only CONVOTHERM internal

c41DE- forerun time(DE=Steam generator)

0 255 0 s only CONVOTHERM internal

c42 DE actual rpm blower - - - rpm only for reading value

c43DE PWM(DE=Steam generator)

- - - % only CONVOTHERM internal

c44 DE (DE=Steam generator) - - - HFAR*d01 Delete Errors *

d02 Key-lock (delete) *

d03 Delete all progr. *

d04 Selftest BM

* = activate with right Scroll key (shown inverse), than turn adjustable knob "1" and save by pressing and releasing the left Scroll key

* = HFAR- H = Heat demand (heat request)- F = Valve open (flame ok)- A = Alarm firing automatic- R = Reset firing automatic



Page 5 / 6

Testing the outputs

Information:The electronic controls offer the possibility via the service numbers d04 d24 to activate various outputs and various functions. Thereby checking the outputs and detecting any defects.

Safety:When specific actuators (processes) are often tripped, one after the other, they can be destroyed!!!

Ser

vice

No

.:

Des

crip

tion

Co

nta

cto

rs

Pin

OE

BO

ES

OG

BO

GS

Co

mm

ents

d04 Self testing of the control module

d05 Testing steam generator heater 1 X12 4 In OES / OGS opens Y4 = Steam generating

d06 Testing steam generator heater 2 X11 8

d07 Testing convection heater 1 X12 3

d08 Testing convection heater 2 X11 7 d09 Testing the lamp X12 2

d10 Testing additional fan X10 1+2

d11 Testing main contactor X13 2

d12 Testing SV condenser cooling X12 5

d13 Testing SV St. gen. feed X12 7 d14 Testing St. gen. pump X13 1

d15 Testing SV demoisturizing X12 6

d16 Testing PFK-EOpt X13 9+10

d17 Testing motor fast right X11 4+5 not in Single Phased18 Testing motor slow right X11 4+6 not in Single Phased19 Testing motor fast right X11 3+5 not in Single Phased20 Testing motor slow left X11 3+6 not in Single Phased21 Testing water nozzles X13 3

d22 Testing nozzle rinsing X13 4

d23 Testing cleaner pump X13 6 d24 Testing ignition automat reset X14 3 not in Single Phase

i



Page 6 / 6

Instruction:1. The desired service point is called-up from the selective service numbers with

the adjustable knob.2. Use this key to change to service value.

3. Switch output on and off with adjustable knob.

Advice: When selecting d04 various functions and status displays light up in

sequence, the display and the key frames. When a key is pressed, the position number is shown in the display.

With d05 d24 using the adjustable knob, the affiliated actuators (processes) can be activated for 10 seconds.


KD / 06.09.2004 3_02e_Error Codes_a.doc Page 1 / 2

3.2 Error Codes

Information: Possible errors or malfunctions during operation are indicated on the digital display

with the Error Number EXX.X and additionally with a short description. These errors can be later read in the Service programme in the error saver r38. With

the "Mr.C" key, the date and time of the error can be called up. When an error is indicated, all processes are switched off, the buzzer sounds and

the unit goes into malfunction. After confirming the error with the key, the CONVOTHERM can continue to operate but only in the Emergency programme.

Possible Error Codes: OEB OES OGB OGS

Shown on display Description OEB OES OGB OGS

E01.0 Low water Low water level X X X X E02.0 Over temp. el. area Over heating in the connection area X X X X E03.0 Fan malfunction Fan malfunction X X X X E04.0 Extra fan

malfunction Additional fan malfunction X X X X

E05.0 No Gas No gas or error in burner system X X E05.1 No Gas No gas on burner HL1 X X E05.2 No Gas No gas on burner 'steam generator' X E05.3 No Gas No gas on burner HL2 X X E05.4 No Gas Start speed on the burner HL1 not

reached X X

E05.5 No Gas Start speed on the burner 'steam generator' not reached

X

E05.6 No Gas Start speed on the burner HL2 not reached

X X

E05.7 No Gas Full load speed on burner HL1 not reached

X X

E05.8 No Gas Full load speed on burner 'steam generator' not reached

X

E05.9 No Gas Full load speed on burner HL2 not reached

X X

E11.0 Excess oven temp. Excess oven temperature X X X X E13.0 Excess steamg.

temp. Excess steam generator temperature

(water foam) X X

E15.0 Excess cond. temp. Excess condenser temperature X X X X E21.0 Oven probe Oven probe malfunction X X X X E22.0 CTC probe Core temperature control probe

malfunction X X X X

E23.0 Steam gen. probe Steam generator probe malfunction X X

i


KD / 06.09.2004 3_02e_Error Codes_a.doc Page 2 / 2

OEB OES OGB OGS

Shown on display Description OEB OES OGB OGS

E24.0 Bypass probe Bypass probe malfunction X X X X E25.0 Cond. probe Condenser probe malfunction X X X X E26.0 STB DE probe Safety thermostat probe in steam

generator malfunction X X

E27.0 Overtemp. DE heat. Safety thermostat over heating in steam generator

X X

E29.0 Probe short to frame Ground contact of thermo couple (defective)

X X X X

E33.0 DE heating failure No measurable increase in steam generator temperature Steam generator

heating defective

X X

E34.0 DE pump failure Steam generator pump defective X X E80.0 ID error all ID pins on low or high (Connector X3) X X X X E81.0 Prog. m