Manual Modes - Sequence Of Events - Rational SelfCookingCenter SCC Training Manual

Humidity control
If the measured humidity value is too high, the clima valve Y5 will be activated and the closing disk will be lifted.
The negative pressure behind the fan wheel will cause dry air from the kitchen be sucked into the cabinet. The
humid air will be displaced and pushed through the cabinet drain into the quenching chamber.
This Clima valve also functions as the safety relief valve.
Cross section of the clima valve
Possible problem:
Broken stud to hold the cover by pushing objects and containers on top of the unit.
Valve stays in open position: very long cooking times and poor steam production (ref service 30, 37)

Manual modes - Sequence of events

To run a manual cooking mode the following steps must be taken:
General conditions:
1. Cooking mode is selected.
2. Time or core temperature is selected.
3. Cabinet door is closed (door contact).
4. Fan motor is running (speed signal via bus).
5. In modes requiring steam the steam generator must be filled with water (level electrode)
6. In modes requiring steam the steam generator will be preheated (thermocouple steam generator B5)
Temperatures of control thermocouple B2 at 80°C (176°F) Wet, 90°C (194°F) in Hot Air
7. Heating control
Cooking modes
Steam at boiling point or below
Steam above boiling point
Combination / finishing at boiling
point and below
Combination / finishing above
boiling point
Hot air
Y5
Steam supply by Hot Air
supply by
B1 ---
P1, B4, RPM B1
B1 B1
P1, B4, RPM B1
--- B1
- 37 -
http://bit.ly/humidity_y5
Humidity control
no humidity control
humidity control by P1,
default setting 60%
alternate operation of steam and
hot air depending on the set humid-
ity and temperature target.
humidity control by P1,
default setting 100%,
only product humidity
V08 en, SCC