20
EXCLUSIVE GREEN C.S.I. - R.S.I.
To access the programming mode, consult “Programming parameters”.
PARAMETER 03. Type of building
In order to calculate delivery temperature, the temperature control system does
not directly use the external temperature value but considers the heat insulation
of the building: in well-lagged buildings, external temperature variations affect
the ambient temperature less than they do in badly-lagged buildings. Use
parameter 3 to set the heat insulation level of the building according to the
following scheme:
PARAMETERS 21 and 22. Maximum and minimum delivery
temperature
These two parameters limit the delivery temperature automatically produced by
the TEMPERATURE CONTROL function. PARAMETER 21 determines
MAXIMUM DELIVERY TEMPERATURE (MAXIMUM HEATING SET POINT)
while PARAMETER 22 determines MINIMUM DELIVERY TEMPERATURE
(MINIMUM HEATING SET POINT).
PARAMETER 44. Enable thermoregulation function
The connected external temperature probe combined with PARAMETER 44
provides the following operating modes:
EXTERNAL PROBE CONNECTED and PARAMETER 44 = 0 (OFF) in this
case the TEMPERATURE CONTROL function is disabled even though the
external probe is connected. The temperature read by the external probe can
always be viewed by pressing the INFO button. The TEMPERATURE
CONTROL symbols are not displayed.
EXTERNAL PROBE CONNECTED, PARAMETER 44 = 1 (ON) in this case
the TEMPERATURE CONTROL function is enabled. The temperature read by
the external probe and the TEMPERATURE CONTROL symbols can be viewed
by pressing the INFO button.
The TEMPERATURE CONTROL function cannot be enabled unless the
external probe has been fitted and connected. In this case, PARAMETER
44 is ignored and has no effect on boiler operation.
PARAMETER 45. Choosing the offset temperature curve (graph 1)
The offset heating curve maintains a theoretical ambient temperature of 20°C
at external temperatures ranging from +20°C to -20°C. The choice of the curve
depends on the rated minimum external temperature (on the geographical area,
therefore) and the rated delivery temperature (on the type of system, therefore)
and must be carefully calculated by the fitter using the following formula:
If, from your calculations, you obtain an intermediate value between two curves,
we suggest choosing the compensation curve closest to the value obtained.
Example: if the value obtained from the calculations is 8, this is between curve
7.5 and curve 10. In this case, choose the closest curve, which is 7.5.
PARAMETER 51. Type of heat request
IF AN AMBIENT THERMOSTAT IS CONNECTED TO THE BOILER, SET
PARAMETER 51 = 0 (graph 2).
The ambient thermostat makes a heat request when its contact closes, while it
stops it when its contact opens. Though delivery temperature is automatically
calculated by the boiler, the user may manually override it. By modifying
HEATING on the user interface, the HEATING SET POINT will no longer be
available but just a value that can be set from +5 to -5°C as required. Modifications
to this value do not directly change delivery temperature but affect the calculation
made to automatically determine its value by modifying the reference tempera-
ture of the system (0 = 20°C).
For boilers fitted with the S.A.R.A. BOOSTER function, if the AMBIENT
THERMOSTAT remains closed for a long time, the boiler automatically increases
the delivery temperature which is added to the effect of the temperature control
function. When the AMBIENT THERMOSTAT opens, the boiler automatically
returns to the value determined by the TEMPERATURE CONTROL function.
IF A PROGRAMMABLE TIMER IS CONNECTED TO THE BOILER, SET
PARAMETER 51 = 1 (graph 3).
When the contact is closed, the heat request is made by the delivery probe on
the basis of the external temperature in order to maintain the rated ambient
temperature at the DAY level (20°C). When the contact opens, it does not stop
the heat request but reduces (parallel shift) the temperature curve to the NIGHT
level (16°C). Though delivery temperature is automatically calculated by the
boiler, the user may manually override it.
By modifying HEATING on the user interface, the HEATING SET POINT will
no longer be available but just a value that can be set from +5 to –5°C as
required.
Modifications to this value do not directly change delivery temperature but affect
the calculation made to automatically determine its value by modifying the
reference temperature of the system (0 = 20°C for DAY level; 16°C for NIGHT
level).
CONNECT AT/BT
In case of using CONNECT AT/BT, accessory supplied on request, the boiler
gives the possibility to choose 2 thermoregulation curves:
- OTC 1 CH (parameter 45) for a direct system
- OTC 2 CH (parameter 47) for a mixed system.
Even in case of second circuit (2CH) the curve depends on the external minimum
project temperature (on the geographical area, therefore) and on the delivey
project temperature (on the type of system, therefore); the installer must to put
attention to calculate it using the following formula:
3
21
22
44
45
51
PARAMETER
TYPE OF BUILDING
MAXIMUM HEATING SET POINT
MINIMUM HEATING SET POINT
ENABLE THERMOREGULATION FUNCTION
OFFSET TEMPERATURE CURVE
TYPE OF HEAT REQUEST
AVAILABLE IN THE PROGRAMMING MODE
INSTALLATION AND CALIBRATION & SERVICE
INSTALLATION
INSTALLATION
INSTALLATION
INSTALLATION AND CALIBRATION & SERVICE
INSTALLATION
New
houses
A
B
C
D
Old
houses
19
20
19
18
Hollow
bricks
14
16
15
12
Solid
bricks
12
15
14
10
Stones
8
11
9
5
16 - SETTING THE THERMOREGULATION
Checking the connection with the external probe
After connecting the external probe to the boiler, use the INFO function to check that the probe has been automatically recognised by the temperature control card.
Immediately after installation, the value read by the probe may very well be higher then that measured by a reference probe.
Enable and optimise the THERMOREGULATION function by setting the following parameters:
Type of building
D
C
B
A
rated delivery T - 20
P. 45 = 10 x
20- rated min. external T
rated delivery T - 20
P. 47 = 10 x
20- rated min. external T
Parameters 31 and 32 give the possibility to define the maximum and the
minimum central heating set-point of the second circuit.
To correct the curve in this configuration, please refer to the instructions supplied
with the accessory.
