35
6.2.3 EMBEDDED CLOCK HEATING SCHEDULE
When the embedded clock is enabled (POR=1 - see above),
a default heating schedule is used to manage the ON/OFF
timings for each day of the week (operating mode = AUTO).
if necessary, the default heating schedule can be changed
according to the User’s needs. Refer to section 2.10 (User
section) for detailed instruction/guidance on how to access
and change the default heating schedule.
18/05/2013
12:17
30
°C
.3
1.3 bar
MENU
INFO
SET
FRI
HOT WATER TEMPERATURE
STATE
PLANT
MON
SETTINGS
MENU
SELECT OPTION
TIME SCHEDULE
MON
18/11/2013
12:17
MAIN
SELECT THE ZONE
SCHEDULE
07:30
11:30
18:00
08:30
13:30
22:30
SELECT
A DAY
START
MAIN
THURSDAY
END
ZONE SCHEDULE
6.2.4 SETTING THE THERMOREGULATION
Thermoregulation (weather compensation) controlled by the
appliance, can only be enabled if an external sensor has been
installed and connected to CE8 (see 5.7). When the presence
of an external sensor is detected, the appliance immediately
enables the thermoregulation function and calculates a
required outlet (flow) temperature that is based on the external
temperature and the chosen climatic curve. The temperature
measured by the outdoor temperature sensor is displayed
on the initial page in the top right, alternating with the display
of the time. When thermoregulation is enabled (outdoor
temperature sensor present), the algorithm for automatically
calculating the outlet setpoint depends on the type of heat
request. In any case, the thermoregulation algorithm will not
directly use the outdoor temperature, but rather a calculated
outdoor temperature that takes into account the building’s
insulation: in buildings that are well insulated, the outdoor
temperature variations will have less impact than those that
are poorly insulated by comparison.
Enabling THERMOREGULATION occurs in the following way:
- select TECHNICAL
WEATHER COMPENSATION
PARAMETERS
WEATHER COMPENSATION
RANGE RATED
TECHNICAL
INSTALLER
CALIBRATION
INSTALLATION
Using the REC10CH it is possible to set the value of the
following parameters:
BUILDING TYPE:
it is indicative of the frequency with
which the value of the calculated outdoor temperature for
thermoregulation is updated, a low value for this setting will
be used for buildings that have little insulation.
Setting range: [5min - 20min]
Factory setting: [5min]
REACTIVITY EXT SENSOR:
it is an indication of the
speed with which variations of the measured outdoor
temperature affect the calculated outdoor temperature value
for thermoregulation, low values indicate high speeds.
Setting range: [0 - 255]
Factory setting: [20]
To change the value of the previous parameters, proceed as
described below:
- select TECHNICAL
WEATHER COMPENSATION
BUILDING TYPE rather than REACTIVITY EXT
SENSOR
- set the desired value.
Note:
The value of the calculated outdoor temperature used
by the thermoregulation algorithm is displayed in the INFO
menu under T EXT FOR THERMOREG.
HEAT REQUEST FROM THERMOSTAT or POR
(Programmable Timer):
the outlet setpoint depends on
the outdoor temperature for obtaining a reference ambient
temperature of 20°C. There are 2 parameters that compete to
calculate the output setpoint:
- slope of the compensation curve (KT)
- offset on the reference ambient temperature.
SELECTING THE COMPENSATION CURVE:
the
compensation curve for heating maintains a theoretical
temperature of 20°C indoors, when the outdoor temperature
is b20°C and -20°C. The choice of the curve
depends on the minimum outdoor temperature envisaged
(and therefore on the geographical location), and on the
delivery temperature envisaged (and therefore on the type of
system). It is carefully calculated by the installer on the basis
of the following formula:
KT = T. outlet envisaged - Tshift
20- min. design external T
Tshift = 30°C standard system
25°C
floor installations
If the calculation produces an intermediate value between two
curves, you are advised to choose the compensation curve
nearest the value obtained.
Example:
if the value obtained from the calculation is 1.3,
this is between curve 1 and curve 1.5. Choose the nearest
curve, i.e. 1.5.
The settable KT values are as follows:
- radiator system: 1.0-3.0
- under floor heating system 0.2-0.8.
Using the REC10CH it is possible to set the selected
thermoregulation curve:
- select TECHNICAL
WEATHER COMPENSATION
CLIMATIC CURVES
- select the heating zone and set the climatic curve.
OFFSET ON THE REFERENCE AMBIENT TEMPERATURE
In any event, the user can indirectly modify the value of
the HEATING setpoint inserting an offset on the reference
temperature that can vary within the range -5-+5 (offset 0 =
20°C).
NIGHT COMPENSATION
Whenever a programmable timer is connected to the
ROOM THERMOSTAT input, the NIGHT COMPENSATION
function can be enabled as follows: TECHNICAL menu
WEATHER COMPENSATION
CLIMATIC CURVES
MAIN.
In this case, when the CONTACT is CLOSED, the heat
request is made by the flow sensor, on the basis of the outdoor
temperature, to obtain a nominal ambient temperature on
DAY level (20°C).
The opening of the contact does not produce a switch-off,
but a reduction (parallel translation) of the climatic curve on
NIGHT level (16°C).
Also in this case, the user can indirectly modify the value of
the HEATING setpoint inserting once again an offset on the
reference DAY temperature (20°C) rather than NIGHT (16°C)
that can vary within the range [-5 - +5].
THERMOREGULATION CURVES
OUTSIDE TEMPERATURE (°C)
DELIVERY TEMPERATURE (°C)
20
30
40
50
60
70
80
90
100
-20
0,2
0,4
0,6
0,8
1,0
1,5
2,0
2,5
3,0
T HT
T LT
-15
-10
-5
0
5
10
15
20
T HT
std systems heating temperature set point (jumper
pos.1 not inserted)
T LT
floor systems heating temperature set point (jumper
pos.1 inserted)
