Beretta MYNUTE X C Installer And User Manual page 16

MYNUTE X
ZONE1 MAX CH SET
This parameter allows you to specify the maximum heating setpoint that can be set for zone 1:
- 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.
Note: the ZONE 1 MAX CH SET value cannot be less than ZONE1 MIN CH SET.
ZONE1 MIN CH SET
This parameter allows you to specify the minimum heating setpoint that can be set for zone 1:
- range 20°C - 80.5°C, default 40°C for high temperature systems
- range 20°C - 45°C, default 20°C for low temperature systems
Note: the ZONE1 MIN CH SET value cannot be greater than ZONE1 MAX CH SET.
ZONE1 OTR
This parameter allows you to activate thermoregulation mode for zone 1 when the system has an
outdoor temperature sensor connected. The factory setting is 0, the boiler always operates for zone 1
at a fixed point; to have the boiler work in climate mode connect an outdoor temperature sensor and
set the parameter to 1, connect an outdoor temperature sensor. With an outdoor temperature probe
disconnected the boiler always operates at a fixed point.
See paragraph "4.5 Setting the thermoregulation" for more details about this function.
ZONE1 OTD CURVES
This parameter allows you to set the number of the compensation curve for zone 1 used by the boiler
when in climatic mode. The factory setting for this parameter is 2.0 for high temperature systems and
0.5 for low temperature ones. The parameter can be set with the range 1.0 - 3.0 for high temperature
systems, 0.2 - 0.8 for low temperature ones.
See paragraph "4.5 Setting the thermoregulation" for more details about this function.
ZONE1 NIGHT COMP
This parameter allows you to activate "night compensation" for zone 1.
The default value is 0, set to 1 to activate the function.
See paragraph "4.5 Setting the thermoregulation" for more details about this function.
DHW
MIN DHW SET
NOT AVAILABLE ON THIS MODEL
MAX DHW SET
NOT AVAILABLE ON THIS MODEL
DHW DELAY
This parameter allows you to set the delayed starting of the boiler in domestic hot water mode.
The factory setting for this parameter is 0 and can be programmed within the range 0 - 60sec.
SUN ON
This parameter allows you to activate the following functions related to the operation of the boiler in
domestic hot water mode:
0 = no function; the boiler is domestic hot water mode starts immediately and uses the related
domestic hot water thermostats, i.e. it switches off at setpoint +5°C and switches back on at
setpoint +4°C (factory setting)
1 = domestic hot water delay function, so the boiler in domestic hot water mode starts with a delay
equal to the value of the parameter DHW DELAY
2 = FUNCTION NOT AVAILABLE ON THIS MODEL
3 = la the boiler uses absolute domestic hot water thermostats, i.e. in domestic hot water mode it
always switches off at 65°C and switches back on at 63°C, independently of the domestic hot
water setpoint that has been set
4 = functions 1 and 3 are active
SOLAR
FSUN
This parameter is used to enable the management of the solar storage cylinder, the BE15 accessory
board must be used. The factory setting is 0 = solar storage cylinder management disabled, set the
parameter to 1 to enable the function.
T MAX TANK
The parameter allows you to set the maximum temperature of the top part of the storage cylinder.
The factory setting is 60°C. The parameter can be set with the range 10°C - 130°C.
DELTA T ON PUMP
The parameter allows you to manage the temperature difference between the collector probe and
the lower storage cylinder probe for the thermal load of the storage cylinder (activation of the solar
pump). The factory setting is 8°C. The parameter can be set with the range 4°C - 30°C.
Note: the DELTA T ON PUMP value should be higher than DELTA T OFF PUMP.
DELTA T OFF PUMP
The parameter allows you to manage the temperature difference between the collector probe and
the lower storage cylinder probe for the interruption of the thermal load of the storage cylinder
(deactivation of the solar pump). The factory setting is 4°C. The parameter can be set with the range
4°C - 30°C. Note: the DELTA T OFF PUMP value should be lower than DELTA T ON PUMP.
INTEGRATION DELAY
The parameter allows you to set the delay time of the solar integration by the boiler.
The factory setting is 0 min. The parameter can be set with the range 0min - 180min.
COLLECTOR T MIN
With this parameter you set the minimum temperature of the collector for activating the solar collector
anti-freeze function.
The factory setting is: - - °C (solar collector anti-freeze disabled).
The parameter can be set with the range -30°C - +5°C.
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COLLECTOR T MAX
Parameter for setting the maximum temperature of the collector for the solar collector pump lockout
(system protection). The pump is then enabled as soon as the temperature of the collector falls below
[COLLECTOR T MAX - 10°C]. The factory setting is 110°C.
The parameter can be set with the range 80°C - 180°C.
Note: the COLLECTOR T MAX value should be higher than COLLECTOR T PROT.
COLLECTOR T PROT
Parameter for setting the maximum temperature of the collector for activating the solar collector
cooling function. The factory setting is 110°C.
The parameter can be set with the range 80°C - 180°C.
Note: the COLLECTOR T PROT value should be lower than COLLECTOR T MAX.
COLLECTOR T AUTH
Parameter for setting the minimum temperature for enabling the solar collector pump.
The factory setting is 40°C. The parameter can be set with the range -20°C - +95°C.
Note: the COLLECTOR T AUTH value should be higher than COLLECTOR T LOCK.
COLLECTOR T LOCK
This parameter allows you to set the minimum temperature for disabling the solar collector pump.
The factory setting is 35°C. The parameter can be set with the range -20°C - +95°C.
Note: the COLLECTOR T LOCK value should be less than COLLECTOR T AUTH.
PWM COLL PUMP
This parameter allows you to set the PWM modulation period of the solar pump.
The factory setting is 0min (solar collection pump modulation function disabled).
The parameter can be set with the range 0min - 30min.
TANK COOLING
Parameter for enabling/disabling the storage cylinder cooling function; there are two options
available:
0= FUNCTION NOT ACTIVE (factory setting)
1= FUNCTION ACTIVE
SOLAR PUMP MODE
Parameter for configuring the operation of the solar collector pump; there are three options available:
0= OFF (factory setting) ==> the solar collector pump is always off
1= ON ==> the solar collector pump is always on
2= AUTO ==> the solar collector pump switches on and switches off according to the solar
management rules
4.5 Setting the thermoregulation
Enabling THERMOREGULATION occurs in the following way:
ƒ access the technical parameters menu, as indicated in the paragraph "3.20 Access to
the parameters"
ƒ select the menu CH and then OTR=1.
Thermoregulation only works with the outdoor temperature sensor connected and active
only for the HEATING function. If OTR = 0 or outdoor temperature probe disconnected the
boiler operates at a fixed point. The temperature measured by the outdoor temperature
sensor is displayed in "4.21 INFO menu" under OUTDOOR TEMP SENS.
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.
REQUEST FROM OT CHRONOTHERMOSTAT
In this case the delivery setpoint is calculated by the chronothermostat according to the
outdoor temperature value and the difference between the ambient temperature and the
desired ambient temperature.
REQUEST FROM ROOM THERMOSTAT
In this case the delivery setpoint is calculated by the adjustment board according to the
outdoor temperature value so as to obtain an estimated outdoor temperature of 20°
(reference ambient temperature).
There are 2 parameters that compete to calculate the output setpoint:
ƒ slope of the compensation curve (KT)
ƒ offset on the reference ambient temperature.
Selecting the compensation curve (parameter OTD CURVES - fig. 20)
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.