Operating Modes And Operating States; Room Temperature Source; Optimization; Definition And Purpose - Siemens RVL481 Basic Documentation

Switching the heating on
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The heating will be switched on again only when all 3 of the following conditions are
satisfied:
• The actual outside temperature has fallen 1 °C below the current ECO heating limit
• The composite outside temperature has fallen 1 °C below the current ECO heating
limit
• The attenuated outside temperature has fallen 1 °C below the "ECO day" heating limit

10.2.4 Operating modes and operating states

The ECO function is performed depending on the operating mode:
Operating mode or operating state
Automatic operation
Continuously REDUCED heating
Continuously NORMAL heating
Protection mode / holiday mode
Manual operation
10.3

Room temperature source

The outside temperature source can be selected on operating line 65.
The following settings are available:
Operating line 65 SET
0
1
2
3
A
Operating line 65 also displays the room temperature source actually used by the con-
troller (ACTUAL).
ACTUAL = 0 controller operates without a sensor
ACTUAL = 1 controller operates with a room unit connected to terminal A6
ACTUAL = 2 controller operates with a room sensor connected to terminal B5
ACTUAL = 3 controller operates with the mean value of the devices connected to A6
and B5
10.4

Optimization

10.4.1 Definition and purpose

Operation of the heating system is optimized. According to EN 12 098, optimization is
the "automatic shifting of the switch-on and switch-off points aimed at saving energy".
This means that:
• Switching on and heating up as well as switching off are controlled such that during
building occupancy times the required room temperature level will always be ensured
• The smallest possible amounts of energy will be used to achieve this objective

10.4.2 Fundamentals

It is possible to select or set:
• The type of optimization: either with a room sensor / room unit or based on the room
model
• The maximum limit value for the heating-up time
• The maximum limit value for optimum shutdown
• Quick setback: Yes or no
Heating and D.h.w. Controller RVL481
10 Function block "Space heating"
ECO function
active
active
inactive
active
inactive
Room temperature source
No room sensor
Room unit at terminal A6
Room sensor connected to terminal B5
Average of devices connected to A6 and B5
Automatic selection
Current heating limit
ECO day or ECO night
ECO night
–
ECO night
–
CE1P2541en
20.05.2008