Beretta EXCLUSIVE C Series Installer And User Manual page 18

EXCLUSIVE
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 "4.1 Access
to the technical parameters"
- select WEATHER COMPENSATION with the "up" and "down" keys,
confirming the selection.
INSTALLATION
WEATHER COMPENSATION
THERMOREGULATION
RANGE RATED
CALIBRATION
INSTALLER
INSTALLER
Using the REC10 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
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 measured
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 "4.1 Access
to 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.
HEAT REQUEST FROM THERMOSTAT or POR (Programmable Timer)
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. 17
The compensation curve for heating maintains a theoretical temperature of
20°C indoors, when the outdoor temperature is between +20°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 "4.1 Access
to 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.
18
TECHNICAL
TECHNICAL
INSTALLATION
PARAMETERS
PARAMETERS
RANGE RATED
CALIBRATION
OFFSET ON THE REFERENCE AMBIENT TEMPERATURE - fig. 17
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. 17
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 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].
5.3 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
REC10 set as an ambient regulator, ensure that the thermostat or timer
is "active" and set correctly (~20°C)
- Then set the boiler for HEATING AND HOT WATER selecting the STATE
menu on the REC10 and then BOILER, based on the season and the
type of operation selected.
FRI FRI
18/05/2013
MENU
MENU
INFO
INFO
HOT WATER TEMPERATURE
HOT WATER TEMPERATURE
HOT WATER ONLY
HEATING AND HOT WATER
- 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.
AIR-PURGING FUNCTION
b
Each time the boiler is started up, an automatic air purging cycle is
carried out lasting 4 min. When the air purging cycle is in progress,
all heat requests are inhibited and a sliding message at the foot of the
page appears on the main page of the REC10.
PLANT
PLANT
12:17
1.3 bar STATE
STATE
42
°C
SET
SET
STATE
STATE
BOILER BOILER
MAIN ZONE
MAIN ZONE
BOILER BOILER
OFF
OFF
SUMMER
WINTER