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Siemens
Heating and D.h.w. Controller RVL481
CE1P2541en
Building Technologies
10 Function block "Space heating"
20.05.2008
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
ECO function
Current heating limit
Automatic operation
active
ECO day or ECO night
Continuously REDUCED heating active
ECO night
Continuously NORMAL heating
inactive
–
Protection mode / holiday mode
active
ECO night
Manual operation
inactive
–
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
Room temperature source
0
No room sensor
1
Room unit at terminal A6
2
Room sensor connected to terminal B5
3
Average of devices connected to A6 and B5
A Automatic
selection
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
Switching the heating on