FAMILY
14
The water tank retention time for anti-legionella varies according to the temperature value
set in the ANTILEGIO TEMP parameter, as shown in the table:
ANTILEGIO TEMPERATURE
Retention temperature
ANTILEGIO TEMP < 58°C
180 min
58°C < ANTILEGIO TEMP < 62°C
60 min
62°C < ANTILEGIO TEMP < 66°C
30 min
66°C < ANTILEGIO TEMP < 75°C
15 min
ANTILEGIO TEMP > 75°C
1 min
4.2.4
Time band scheduling function
Set up the REC10CH for the time schedule, setting the parameter POR = 1 (see “4.2.2
Configuration of the zone”). Set the time slots by selecting from the main screen MENU
TIME SCHEDULE.
TIME SCHEDULE
SETTINGS
SELECT OPTION
MENU
MAIN
MON
12/04/2021
12:17
SCHEDULE
START
END
THURSDAY
ZONE SCHEDULE
SELECT A DAY
07:30
08:30
11:30
13:30
18:30
22:30
MAIN
Programming: for each day of the week it is possible to set up to 4 bands, characterized by a
start time and an end time.
Note
: For more details on the use of the programming timing see the
USER MANUAL of the REC10CH.
4.2.5
Setting the thermoregulation
Thermoregulation only works with the outdoor temperature sensor installed/connected and
active only for the HEATING function. 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.
RANGE RATED
WEATHER COMPENSATION
PARAMETERS
INSTALLATION
CALIBRATION
INSTALLER
TECHNICAL
Using the REC10CH it is possible to set the value of the following parameters:
BUILDING TYPE:
it is an indication of the frequency with which the value of the calculated
outdoor temperature for thermoregulation is updated, a low value will be used for buildings
that have little insulation.
Setting range:
[5min - 20min]
Factory setting:
[5min]
OUTDOOR REACTIVITY:
it is an indication of the speed with which variations of the
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 or
OUTDOOR REACTIVITY
-
set the desired value.
Note:
The value of the calculated outdoor temperature used by the thermoregulation
algorithm is displayed in the INFO menu under FILTERED OUTDOOR TEMP.
REQUEST FROM ROOM THERMOSTAT OR POR (Heating Programming Timing)
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:
- standard system: 1.0-3.0
- floor 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 compensation curve.
EXTERNAL TEMPERATURE (°C)
DELIVER
Y TEMPERA
TURE
(°C)
T HT
Maximum heating temperature set point for std systems
T LT
Maximum heating temperature set point for floor systems
3,0
100
90
80
70
60
50
40
30
20
20
Te
mperatura di mandata (°C)
Temperatura esterna (°C)
15
10
5
0
-5
-10 -15 -20
2,5
2,0
1,5
T80
1,0
0,8
0,6
0,4
0,2
T45
CURVE DI TERMOREGOLAZIONE
T HT
T LT
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).
90
80
70
60
50
40
30
20
10
30
Te
mperatura di mandata (°C)
Temperatura esterna (°C)
25 20 15
+5°C
0°C
-5°C
10 5
0 -5 -10 -15 -20
CORREZIONE CURVA CLIMATICA
DELIVER
Y TEMPERA
TURE
(°C)
EXTERNAL TEMPERATURE (°C)
NIGHT COMPENSATION
Qualora all’ingresso ROOM THERMOSTAT venisse collegato un programmatore orario, da
menù TECHNICAL
WEATHER COMPENSATION
CLIMATIC CURVES
MAIN può essere abilitata la funzione NIGHT COMP. 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].
90
80
70
60
50
40
30
20
10
Te
mperatura di mandata (°C)
Temperatura esterna (°C)
20
15
10
5
0
-5
-10 -15 -20
RIDUZIONE NOTTURNA PARALLELA
Curva climatica GIORNO
Curva climatica NOTTE
EXTERNAL TEMPERATURE (°C)
DELIVER
Y TEMPERA
TURE
(°C)
DAY TEMPERATURE CURVE
NIGHT TEMPERATURE CURVE
4.3
First commissioning
-
Position the system’s master switch to the “on” position.
-
Open the gas tap to allow fuel to flow.
-
Adjust the room thermostat to the desired temperature (~20°C) or, if the system is
equipped with a chronothermostat or programmable timer or REC10CH set as an
ambient regulator, ensure that the thermostat or timer is “active” and set correctly (~20°C)
-
Select STATE
BOILER
HEATING AND HOT WATER (WINTER).
OFF
HOT WATER ONLY
HEATING AND HOT WATER
BOILER
BOILER
MAIN ZONE
STATE
42
°C
MENU
STATE
SET
INFO
HOT WATER TEMPERATURE
FRI
1.3
bar
09/04/2021
12:17
PLANT
-
When there is a heat request and the boiler is igniting, the icon appears on the display. The
boiler will start up and continue working until the set temperatures are reached, after which it
will then go back to standby.
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