Sime D Serie Manual Del Usuario página 83

15
Anti–freeze room temperature setpoint
This function prevents room temperature from sinking under the set
anti–freeze value.
a) Push the line selection button to select line 15.
b) Push the + / – buttons to adjust the anti–freeze room tempe-
rature setup.
Set–up range U/M
4...TRRw °C
TRRw = Reduced room temperature setpoint (setting on line 14)
16
Summer/Winter switching temperature
The Summer/Winter switching temperature is the criterion for the
automatic Summer/Winter switching of the heating system.
a) Push the line selection button to select line 16.
b) Push the + / – buttons to select the Summer/Winter switching
temperature.
Set–up range U/M
8...30.0 °C
The attenuated external temperature (Taged) is calculated at
10–minute intervals according to the actual external temperature
(Takt) and it has a direct effect on the Summer/Winter switching.
TAakt = Actual external temperature
TAged = Attenuated external temperature
To determine the switching, the Summer/Winter switching tempe-
rature setup (which is indicated with SuWi in the following diagram),
± a fixed switching differential value, is compared to the attenuated
external temperature.
Switching between the summer and winter operation
TAged = Attenuated external temperature
SuWi = Summer/Winter switching temperature
In one system, you can set up a different Summer/Winter switching
temperature for each zone (for each RVA46.531 regulator), to meet
the requirement of every single user.
17
The regulator generates the delivery temperature setpoint according
Default value to the selected heating curve.
10
a) Push the line selection button to select line 17.
b) Push the + / – buttons to select the curve slope.
Set–up range
–.–– / 2.5...40
When the curve is quiescent (setting is –.––), the regulator needs an
external heat requirement.
This must be transferred to the regulator via LPB or via the H1 input.
If there are various different signals, the regulator will use the highe-
st requirement.
Default value
The regulator generates the delivery temperature setpoint using the
17 heating curve, thus allowing the system to maintain a constant room
temperature even without utilizing a room unit. The more accentua-
ted the heating curve slope, the higher the prescribed value for the
delivery temperature when the external temperature is low.
Using a room unit, the comfort will increase considerably.
The composite external temperature is a mixture of the actual exter-
nal temperature and the attenuated external temperature as calcu-
lated by the regulator.
The mixture of actual and attenuated external temperature depends
upon the building's type of construction (setting n° 70) and is gene-
rated as follows:
Selected type of construction
The composite external temperature acts as a compensating varia-
T = Temperature
ble on the delivery temperature control, which is thus paired to the
t = Time
prevalent weather conditions.
H = heating
Heating curve slope
U/M
Increment
TV = Delivery temperature
TA = Composite external temperature
Composite external temperature
Heavy (setting 70 = 0)
Light (setting 70 = 1)
Default value
15.0
Tagem 1/2 TAakt + 1/2 TAged
Tagem = 3/4TAakt + 1/4 TAged
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