Rational SelfCooking Center Combi Master Installation guide

Training manual
Fundamentals
SCC Line
SelfCooking Center - Combi Master

V03 EN, Fundamentals - 2 -
General hints:
Isolate the appliance from mains supply before opening the appliance
When working with chemicals, i.e. aggressive cleaning materials
always wear protective clothing, goggles and gloves!
After maintenance / repair the appliance must be checked for electric
safety in accordance with your national, state and local requirements!
Whenever working on any gas component like:
Gas valve, gas blower and / or changing connected type of gas a detailed
flue gas analysis MUST be done using adequate CO and CO2
measuring equipment! This shall ONLY be done by trained technicians!
Always check appliance for possible gas leakages!

- 3 - V03 EN, Fundamentals
Company history 4
History of the Combi Steamer 5
Structure of serial number 6
Unit sizes and accessories 8
List of content
Function scheme of the Combi Steamer 9
Localisation of parts 10
Common
Water level control Steam Generator 13
SC (Self Clean) Automatic 14
Water- / Steam relation 15
Steam control 16
Cooking modes 17
Fan motor 18
Bus control (data line) 19
Control of basic functions 20
Structure of Combi Steamer
Basic function
SolidStateRelay (SSR) internal design / Test 21
SSR 100% - 50% power at 3NAC/400V 22
SSR 100% - 50% Leistung bei 3AC 200-240V 23
Solid State Relay (SSR)
Registration forms / warranty conditions
General information about water 24
Ultravent 26
CombiDuo, Thermo cabinet 29
Sicotronic 30
Miscellaneous
Product surveillance guideline 32
Registration form product surveillance 33
Registration form „Dead on arrival“ 34
Warranty conditions 35

V03 EN, Fundamentals - 4 -
Milestone of an extraordinary company history
1973 Foundation of RATIONAL GmbH as a company for producing and selling of hot air ovens in
Germany
1976 Invention of the RATIONAL Combi-Steamer
1993 Opening of plant number 2
1993 Invention of the RATIONAL Clima Combi®
1997 Invention of the RATIONAL ClimaPlus Combi®
2000 Going public RATIONAL AG
2000 CleanJet® – World wide the first full automatic self clean system
2004 Invention of the first SelfCooking Center® of the world
2005 Invention of the first VarioCooking Center® of the world by our daughter company
FRIMA. Cooking, roasting, frying, simply better, in one appliance, with double speed.
2008 Opening of the third and biggest plant in Landsberg
2008 CleanJet+Care® – cleaning intelligence for a maximum reliability
The following daughter companies were founded:
UK, France, Japan, USA, Italy, Scandinavia, Switzerland, Canada, Spain,
RATIONAL Großküchentechnik in Germany, Russia, Austria, Poland, China, Greece,
Middle East and Ukraine
Company history

- 5 - V03 EN, Fundamentals
Product line: Designation: Serial number Produced Produced as of up to Classic Line CD Steam, Hot air, Combi (S, HA, CS) 7609D 1234 1976 05-1997 CM (S, HA, CS) Vario-Steam (VS) 11M8610 1234 1986 11-1989 CM (S, HA, CS, VS), Reheating (R) 11M8904 1234 04-1989 04-1991 CC (S, HA, CS, VS, R)
Low Temp Cook (LT)
11C9103 1234 03-1991 05-1997
CM S, HA, CS, VS, R 11M9104 1234 04-1991 05-1997 CM Gas (101) 14G9104 1234 04-1991 10-1997 CM Gas (201) 21G9301 1234 01-1993 10-1997 CM Gas (62) 62G9403 1234 03-1994 10-1997 C-Line C-Line 61, 101 CCD – CCM - CCC CCM, CCC: humidity control C11D93101234 10-1993 05-1995 C-Line 201, 202 CCD – CCM - CCC C11M93101234 10-1993 05-1997 C-Line 61, 101 CCD – CCM - CCC C11C95051234 05-1995 05-1997 C-Line 102 CCD – CCM - CCC C12C95101234 10-1995 05-1997 CPC Line : ClimaPlus Combi® CD – CM - CPC CPC: ClimaPlus control E11CA97051234 05-1997 02-1999 CM Gas, CPC Gas G11CA97101234 10-1997 02-1999 CPC New humidity control E11CB99021234567 02-1999 03-2004 CPC IQT Sensor E11CB99101234567 10-1999 03-2003 CPC CleanJet®, CDS® E11CC00031234567 03-2000 03-2004 CM Gas, CPC Gas Electronic motor control, G11CD01011234567 01-2001 03-2004 230V burner control CM, CPC Electric Electronic motor control E11CD01031234567 03-2001 03-2004 CD – CM - CPC Elimination of motor protector E11CD01121234567 12-2001 03-2004 SCC Line SelfCooking Center® CM Electric / Gas E11ME04042345678 04-2004 01-2006 CM Electric / Gas New CPU pcb E11MF06022345678 02-2006 09-2008 CM Electric / Gas Extension of warranty E11MG08102345678 10-2008 SCC Electric / Gas E11SE04042345678 04-2004 09-2008 SCC Electric / Gas CareControl / Extension of warranty E11SG08102345678 10-2008
History of the Combi Steamer

V03 EN, Fundamentals - 6 -
Structure of serial number
Energy Unit size Model Version Year Month Serial
number
E - Electric
G - Gas
61 - 6x1/1GN
62 - 6x2/1GN
11 - 10x1/1GN
12 - 10x2/1GN
21 - 20x1/1GN
22 - 20x2/1GN
S - SCC
M - CM
E: initial unit
F: only CM, new
pcb
G: SCC + CM
SCC Care Control
04 - 2004 07 - July 7-digit
number
Energy Unit size Model Version Year Month Serial
number
E - Eletric
G - Gas
61 - 6x1/1GN
62 - 6x2/1GN
11 - 10x1/1GN
12 - 10x2/1GN
21 - 20x1/1GN
22 - 20x2/1GN
C - CPC
M - CM
D - CD
A: initial unit
B: new humidity
C: CleanJet, CDS
D: Motor control
03 - 2003 07 - Juli 4-digit
number until
12.1998
7-digit
number from
01.1999
C-Line Unit size Model Year Month Serial number
61 - 6x1/1GN
11 - 10x1/1GN
12 - 10x2/1GN
21 - 20x1/1GN
22 - 20x2/1GN
C - CCC
M - CCM
D - CCD
95 - 1995 05 - Mai 4-digit number
CD Unit size Model Year Month Serial number
00694071234
10194071234
20194071234
02094071234
14G94071234
21G94071234
06 - 6x1/1GN
11 - 10x1/1GN
21 - 20x1/1GN
22 - 20x2/1GN
C - CC
M - CM
CM 101Gas
CM 201Gas
94 - 1994 07 - Juli 4-digit number
SCC Line: E 61 S E 04 07 2345678
from 04.2004
CPC Line: E 61 C B 03 07 123456
from 06.1997
until 04.2004
C Line: C 61 C 95 05 1234
from 10.1993
until 05.1997
Classic Line: 06 M 94 07 1234
from 1986
until 05.1997

- 7 - V03 EN, Fundamentals
Control panel Layout
SCC Line
CPC Line
C-Line
Classic Line
CM SCC

V03 EN, Fundamentals - 8 -
Unit sizes and accessories
SelfCooking Center®
6 x 1/1 GN
SelfCooking Center®
6 x 2/1 GN
SelfCooking Center®
6 x 1/1 GN
on
10 x 1/1GN
as Combi Duo
SelfCooking Center®
6 x 2/1 GN
on
10 x 2/1GN
as Combi Duo
SelfCooking Center®
20 x 1/1 GN
SelfCooking Center®
20 x 2/1 GN
Thermo Cabinet Base

- 9 - V03 EN, Fundamentals
Function scheme of the Combi Steamer
Level electrode Sensor SG
Steam generator (SG)
Self Clean (SC) Pump
Solenoid valve filling Solenoid valve
quenching
Quenching sensor
Quenching box
Emergency drain
Door contact switch (DCS)
Cabinet sensor
Safety temperature limiter (STL)
Core temperature sensor (CT)
Safety temper- ature limiter (STL)
Steam heating element
Hot air heat- ing element
Fan motor
Safety valve
Check valve
Ventilation pipe
Air baffle
Water supply
Drain
Hand shower roll guide (option) with hand shower
Interior cabinet

V03 EN, Fundamentals - 10 -
STL
SG
STL Cabinet
Thermocouple SG
Level-
electrode
Localisation of parts
Solenoid valve
single
SC Pump
Thermocouple
quenching
Main contactor
Net filter
SSR
Quenching = blue
Filling = green

- 11 - V03 EN, Fundamentals
Buzzer
Poti CT/timer
Trafo
Operator pcb
Door contact
switch
Localisation of parts
Reset button
STL cabinet
STL steam generator
Wiring diagram
(from 08-2010 behind left side
panel)
Fuses
Hand shower roll
guide (option)

V03 EN, Fundamentals - 12 -
Localisation of parts
STL cabinet
Thermo couple
cabinet
Steam inlet
pipe
Fan wheel
Hot air heating
element

- 13 - V03 EN, Fundamentals
Center S2 ==> Ground: 2 - 6V AC:
water level too low
steam heating must switch OFF
solenoid valve filling Y1 ON
Center S2 ==> Ground: 0V AC:
water level reached
steam heating can switch ON
solenoid valve filling Y1 switched OFF
The level electrode is equipped with two side elec-
trodes to ensure a safe water level recognition even
though the level electrode is scaled. These side
electrodes compensate the build up of scale (CM).
Permanent water level control;
Maximum continous steam time: 2 Minutes,
Property of connected water:
Conductivity must be above 50µS/cm;
Overfilling of the steam generator can be caused by a
connected water treatment system.
St.Gen. empty: ca. 2 - 6V AC
St.Gen. empty: 0V
SV Filling on 230V
SV Filling off 0V
Heating on 230V
Heating off 0V
Filling SG Max. heating 2 Min. Control Steam heating
V
AC
S2
M4
Y1
Y2
B2
S2
B5
F3
Water level control Steam Generator

V03 EN, Fundamentals - 14 -
During the production of steam, the concentration of minerals inside the steam generator will
increase over time. These minerals settle on the heating elements and heat exchanger as
well as the interior steam generator walls.
In order to reduce this effect the steam generator will be pumped off and flushed regularly depending
on the duration of steam production. This process needs approximately 45 seconds.
After emptying the steam generator it will be filled automatically with fresh water.
There are 4 conditions to start this SC Automatic:
1. Heating time of the steam generator must exceed 60 min.* and
2. the temperature of the thermocouple steam generator must be below 65°C (149°F) and
3. the temperature of the thermocouple interior cabinet must be below 70°C (158°F) and
4. the unit is switched ON.
In case the unit is used permanently the above mentioned temperature conditions
can not be met.
In this case the following 2 conditions apply:
1. The heating time of the steam generator reaches the twice the set duration*, i.e. 120 min. and
2. the unit door is open for longer than 30 seconds
* The marked values can be changed in unit specific ranges using the diagnostic program
(see modules SCC and CM).
SCC Index G: 120 min.
After completion of the SC-Automatic the accumulated steam heating time is re-set to zero.
SC-Automatic does not replace the need for descaling and/or installing water treatment filter
SC (Self Clean) Automatic

- 15 - V03 EN, Fundamentals
1l
1700l Steam
approx.1700l Steam
1l Water
Expansion through
heat energy
Volume reduction
through quenching
E+
E-
1dm3
30°C
E+
300°C
2dm3
Steam
Hot air
volume
Water
cold water
Water- / Steam relation

V03 EN, Fundamentals - 16 -
Intelligent steam control via quenching sensor
1. Filling of interior cabinet based on time and
temperature control of B2 quenching sensor;
(cabinet if fully filled with steam and all sur-
faces have reached steam temperature).
2. After steam saturation inside cabinet steam
will also fill quenching chamber
3. After reaching quenching temperature (B2)
quenching solenoid Y2 will be activated.
Depending on the frequency of temperature
raise of the quenching sensor B2 the duration
of the next steam supply is calculated.
B2 temperature with partial load
B2 temperature with full load
4. The amount of steam inside the cabinet is
directly depending on the temperature varia-
tion of quenching sensor B2.
Y1 Y2
B2
B1
Temp.
t (s)
B1 - 100°C(212°F)
70°C
(158°F)
Y1 Y2
B2
B1
Y1 Y2
B2
B1
Steam control

- 17 - V03 EN, Fundamentals
Cooking modes
B1
B3
F4
M4
Y1 Y2
B2
M1
S2
B5
F3
S3
Mode Designation Temperature range Responsible sensor
Steam 100°C
fixed value Quenching sensor (B2) controls steam heating
Vario Steam 30-99°C Cabinet sensor (B1) controls steam heating
Combi Steam 30-300°C
Cabinet sensor (B1) controls hot air heating
Quenching sensor (B2) controls steam heating
Hot air heating has priority over steam heating
F
Finishing 30- 300°C
Cabinet sensor (B1) controls hot air heating
Quenching sensor (B2) controls steam heating
Alternating heating with steam and hot air
Electr.: 8/8sec., Gas: 20/20 sec.
Hot air 30 - 300°C Cabinet sensor (B1) controls hot air heating
To activate the unit the following conditions must be given:
1. Cooking mode is selected.
2. Cooking time or core temperature is set.
3. Cabinet door is closed.
4. In case of wet cooking modes, water must be detected in the steam generator.

V03 EN, Fundamentals - 18 -
Fan motor
Jumper
Net
Jumper 40.01.581 is ONLY set on floor model 201 and 202 on top motor for a uniquely defined address
Jumper is not used on models 61 - 102 as only one motor is installed!
If jumper is not set correctly a failure display, depending on the model, is shown!
LED code fan motor SCC and CM from 04/2004
Reason Remedy
1x Motor doesn’t start, no changing
signal from hallsensor
Check for motor blockage or change motor.
2x Voltage too low on motor pcb Check supply voltage or
change motor.
3x Voltage too high on motor pcb Check supply voltage or
change motor.
4x rpm measurement defective Change motor.
5x Motor pcb temperature >105°C Check cooling system (cooling fan, air
intake filter), otherwise change motor
6x Supply voltage <80V Check power supply
(F1-F2)
7x Motor pcb defective Change motor.
8x Motor pcb defective Change motor.
Only units 3AC400-480V (without neutral) are equipped with motor 40.00.276 (3-phase supply)
All other units are equipped with motor 40.00.274.

- 19 - V03 EN, Fundamentals
Basics:
In a bus system the single items are operated via addresses.
Every address only exists once in the system and is permanent assigned to every part.
By sending the address with a corresponding information in digital format the CPU tells the
parts which actions shall be taken.
Additionally the CPU can receive information from the parts (e.g. actual rpm`s).
If two ignition boxes respectively two motors are installed in a unit, the identical parts must
have different addresses. These different addresses are generated by setting a jumper in the
corresponding parts (see pictures above)
.
Bus control (data line)
Jumper
1234
on
X7
X19
X20
X18
X23
X31
RS 485
X8
X12
X16
X17
X26
X27
X32X24
X63
F6.1
F6
X3X4X6
X2
X50
on
off
0,1 AT
2 AT
X7
X19
X20
F1 F2
0,1AT 2 AT
Transformer X16
42.00.004 42.00.047
X30
RS 232
pcb Fan motor Second fan motor only floor models
Ignition box only gas models Second ignition box only floor models
Jumper
X 31

V03 EN, Fundamentals - 20 -
Control of basic functions
2
Signal input to PCB
Themocouple
Level electrode
Door contact
etc
Signal input to PCB
via BUS from Ignition Box
GAS - monitoring electrode
GAS - RPM gas blower
RPM Fan motor via BUS
PCB
Gas
Ignition box
1
230V components:
- Transformer
- Water Solenoid
- Pump
- Cooling fan
- etc
Signal output from PCB
Heating request steam / hot air
Water solenoid
Pumps
etc
2
Fan Motor
1
Components Signal Flow