FAMILY
18
REC10 MASTER
: the heat request to the boiler is generated by the REC10 MASTER
that assumes the function of MACHINE INTERFACE
-
TYPE OF ZONE
This parameter allows you to specify the type of zone to be heated, it is possible to
choose from among the following options:
HIGH TEMPERATURE (factory setting)
LOW TEMPERATURE
-
MIN SET HEAT
This parameter allows you to specify the minimum heating setpoint that is possible
(range 20°C - 80.5°C,
default 20°C for high temperature systems - range 20°C -
45°C, default 20°C for low temperature systems)
-
MAX SET HEAT
This parameter allows you to specify the maximum heating setpoint that is possible
(range 20°C - 80.5°C, default 80.5°C for high temperature systems - range 20°C -
45°C, default 45°C for low temperature systems)
-
CHANGING NAME
This parameter allows you to attribute a specific name to the heating zone
-
POR
This parameter allows you to enable the central heating programming timing for the
zone concerned if the heat request is carried out using a room thermostat.
Programming timing not enabled = 0
When the room thermostat contact closes the heat request is always met without any
time band limitation.
Programming timing enabled = 1
When the room thermostat contact closes the heat request is enabled according to the
programming timing.
Note
: In this case make sure that the operating mode of the zone is set to AUTO in the
STATE menu.
5.2.3
Time band scheduling function (room thermostat)
Whenever the heating system is managed by a room thermostat, and therefore without
any programming timing, it is possible to tie the heat requests coming from the device to
programmable time bands by setting the parameter POR = 1 (see section “Configuring the
zone”), in other cases it is always enabled
.
To access this function:
-
select MENU on the main page of the REC10 and press “
ENTER
”
30
°C
.3
MENU
STATE
SET
INFO
HOT WATER TEMPERATURE
FRI
1.3
bar
18/05/2013
12:17
PLANT
-
select TIME SCHEDULE with the “
UP
” and “
DOWN
” keys, confirming the selection
TIME SCHEDULE
SETTINGS
SELECT OPTION
MENU
From this menu it is possible to access the display and adjustment of the programming
timing for the heating functions of the zone. For each day of the week it is possible to set
up to 4 bands, characterised by a starting time and an end time.
Note
: For more details on the use of the programming timing see the USER MANUAL of
the REC10.
MAIN
MON
18/05/2013
12:17
SCHEDULE
START
END
THURSDAY
ZONE SCHEDULE
SELECT A DAY
07:30
08:30
11:30
13:30
18:30
22:30
MAIN
5.2.4
Setting the thermoregulation
Thermoregulation only works with the outdoor temperature sensor connected and active
only for the HEATING function; therefore, once installed, connect the outdoor temperature
sensor to the specific connections on the boiler terminal board.
This enables the THERMOREGULATION 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:
-
access the technical parameters as explained in the section“ Accessing the technical
parameters”
-
select WEATHER COMPENSATION with the “
UP
” and “
DOWN
” keys, confirming the
selection.
RANGE RATED
WEATHER COMPENSATION
PARAMETERS
INSTALLATION
CALIBRATION
INSTALLER
TECHNICAL
Using the REC10 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]
At this point, to change the value of the previous parameters, proceed as described below:
-
access the technical parameters as explained in the section“ Accessing the technical
parameters”
-
in sequence select WEATHER COMPENSATION and
BUILDING TYPE
rather than
OUTDOOR REACTIVITY
with the “
UP
” and “
DOWN
” keys, confirming the selection
-
set the desired value with the “
UP
” and “
DOWN
” keys, confirming the selection.
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)
In this case 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- (Fig. 20)
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 REC10 it is possible to set the selected thermoregulation curve:
-
access the technical parameters as explained in the section“ Accessing the technical
parameters”
-
in sequence select WEATHER COMPENSATION
and CLIMATIC CURVES with the “
UP
”
and “
DOWN
” keys, confirming the selection
-
select the desired heating zone with the “
UP
” and “
DOWN
”, keys confirming the selection
-
set the desired climatic curve with the “
UP
” and “
DOWN
” keys, confirming the selection.
OFFSET ON THE REFERENCE AMBIENT TEMPERATURE - (Fig. 20)
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 - (Fig. 20)
Whenever a programmable timer is connected to the ROOM THERMOSTAT input, from the
TECHNICAL\WEATHER COMPENSATION
\CLIMATIC CURVES\MAIN the
NIGHT COMP
function can be enabled. In this case, when the CONTACT is CLOSED, the heat request
