Temporary Switch-Off; Switching Off For Lengthy Periods - Beretta MYNUTE X C Series Installer And User Manual

MYNUTE X
4.20 INFO menu
Pressing key 3 on the display screen displays a list of information regarding the operation of the
boiler listed by parameter name and value. Passing from the display of one parameter to the
next takes place by pressing respectively the keys
the selected parameter to be displayed; pressing the key
Parameter Scrolling message
name only if parameter P1.05 = 1
I0.01 SCREED HEATING HOURS
I0.02 CH PROBE
I0.03 RETURN PROBE
I0.04 DHW PROBE
I0.08 EXHAUST PROBE
I0.09 OUTDOOR TEMP PROBE
I0.10 FILTERED OUTDOOR TEMP
DHW FLOW RATE
I0.11
DHW SETPOINT
I0.12 FAN SPEED
I0.13 MAIN ZONE OUTLET
I0.14 ZONE 1 OUTLET
I0.15 EXHAUST PROBE HOURS
I0.16 MAIN ZONE SET
I0.17 ZONE 1 SET
I0.18 WATER PRESSURE
I0.30 COMFORT
I0.31 SUN ON
I0.33 PCB ID
I0.34 PCB FW
I0.35 INTERFACE FW
4.21

Temporary switch-off

In the event of temporary absences (weekends, short breaks, etc.) set the status of the
boiler to OFF .
While the electrical supply and the fuel supply remain active, the boiler is protected by the
systems:
- heating anti-freeze: this function is activated if the temperature measured by the flow sensor
drops below 5°C. A heat request is generated in this phase with the ignition of the burner at
minimum output, which is maintained until the outlet water temperature reaches 35° C;
- domestic hot water anti-freeze: this function is activated if the temperature measured
by the domestic hot water probe drops below 5°C. A heat request is generated in this
phase with the ignition of the burner at minimum output, which is maintained until the
outlet water temperature reaches 55° C.
b
The operation of the ANTI-FREEZE function is indicated by a scrolling message
on the interface display: AF1 (DHW antifreeze in progress) - AF2 (CH antifreeze in
progress), as the case may be.
- circulator anti-locking: the circulator activates every 24 hours of stoppage for 30
seconds.
4.22

Switching off for lengthy periods

The long term non use of the boiler causes the following operations to be carried out:
- set the status of the boiler to
- set the system's main switch to "off"
- close the fuel and water taps of the heating and domestic hot water system.
22
and . Pressing the key allows
returns you to the main screen:
Description
Number of hours passed with screed heater function
Boiler delivery sensor value
Boiler return sensor value
Domestic hot water probe value
Flue gas probe value
Outdoor temperature sensor instantaneous value
Outdoor temperature fi ltered value used in the thermoregulation algorithm for calculating the
heating setpoint
For instantaneous boiler with fl owmeter
Only in case of OTBus connection
Number of turns of the fan (rpm)
Main zone fl ow sensor value (when P4.12 = 1)
Zone 1 fl ow sensor value (when P4.13 = 1)
Number of hours the heat exchanger has been operating in "condensing mode"
Main zone delivery setpoint
Zone 1 delivery setpoint (when P4.23 = 1)
System pressure
Domestic hot water comfort (COFF, CSTD, CSMT)
Special functions active for high domestic hot water temperature inputs
Electronic board card identifi cation
Electronic board card fmw revision
Interface fmw
In this case, the anti-freeze and anti-blocking systems are deactivated. Drain the heating
and domestic water system if there is any risk of freezing.
Closing
position
4.23 Keyboard lockout function
Pressing buttons 1+3 for at least 2sec activates the key lockout; pressing buttons 1+3 again
for at least 2sec re-activates the key. The display will show LOCK.
+ +
RESET MENU
1 3