Beretta Ciao 25C User Manual

10
DHW DELAY function (1)
Activatethisfunctiontoenableadelay,equaltothesetvalueoftheparameter,
on the activation of the pump and fan when a DHW request is received.
SMART-FAN function (2)
Ifthisfunctionisactivated,thefaniskeptattheminimumspeed(MIN)andisnot
switched off if the burner is OFF due to DHW overtemperature (with a request
still active).
ABSOLUTE THERMOSTATS function (3)
Ifthis functionisactivated, theDHWthermostats forburnerON/OFF switch
from the relative value to the absolute one.
ANTI-OSCILLATION function (4)
Ifthisfunctionisactivated,theboilerself-configurestoABSOLUTETHERMO-
STATS if the burner is OFF due to DHW overtemperature (with a request in
progress).WhentheburnerisOFF,thefaniskeptattheminimumspeed.The
thermostats go back to being “correlated” at the end of the request.
3.7 Screed heater function
Withthesystematalowtemperature,the“screedheater”functionenablesa
heating request with a delivery setpoint of 20°C in the initial zone. This value is
then gradually increased as shown in the table below.
DAY TIME TEMPERATURE
1 0
20°C
6 22°C
12 24°C
18
26°C
2 0 28°C
12
30°C
3 0 32°C
4 0 35°C
5 0 35°C
6 0 30°C
7 0 25°C
This function lasts 168 hours (7 days).
To activate the screed heater function:
 set the boiler to OFF (because this function is only available in this mode)
 set 409 =1. The display will show
R
c
S
---
Onceactivated,thisfunctiontakesmaximumpriority.Ifthereisapowerfailure
andreset,thefunctionwillresumefromthepointwhereitwasinterrupted.
The screed heater function can be disabled by bringing the boiler to a condition
otherthanOFF,orbysetting409 = 0 .
b
NB: The temperature and increase values can be set to different values
onlybyqualifiedpersonnel,onlyifstrictlynecessary.Themanufacturer
declines all responsibility if the parameters are incorrectly set.
In item I001oftheINFOmenu,youcanseethenumberofhoursthathave
elapsed since the function was activated .
3.8 Combustion analysis
b
Checks to verify the adjustments of the CO2 values in relation to the
reference parameters (given in the tables below) must be carried out
withthecasingclosed.Ifthecasingisopened,thevalueswillhavetobe
reduced by about 0.2% depending on the installation configuration (the
type and length of the discharge and suction pipes).
Combustion control sequence
1
4
5
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2
3
Installer
manual
QR
fumes adaptor
90
80
70
60
50
40
30
20
10
Temperatura di mandata (°C)
Temperatura esterna (°C)
20 15 10 50-5 -10 -15
-20
RIDUZIONE NOTTURNA PARALLELA
Curva climatica GIORNO
Curva climatica NOTTE
delivery temperature (°C)
external temperature (°C)
PARALLEL NIGHT TIME REDUCTION
DAY TEMPERATURE
CURVE
NIGHT TEMPERATURE
CURVE
Inthiscasetoo,theusercanindirectlymodifytheHEATINGsetpointvalueby
defining an offset on the reference DAY temperature (20°C) or the reference
NIGHT temperature (16°C) that can vary within the range [-5 to +5].
NIGHT COMPENSATION is not available if OT+ chrono is connected.
For the correction of the offset, refer to paragraph “6.2 Setting the heating
setpoint ”.
3.5 “DHW comfort” function
P
H
O
+
1
2
3
>2 sec
P
H
O
P
H
1
P
H
2
P
H
3
P
H
1
P
H
3
Function Scrolling message
PH0 NO function active
PH1 PRE-HEATING function active
PH2 TOUCH & GO function active
PH3 SMART PRE-HEATING function active
PH1 PRE-HEATING function
Set PH1 to activate the DHW pre-heating function on the boiler. This function
keepsthewaterinthedomestichotwaterexchangerhot,toreducestandby
times when a request is made. The function is not active when the boiler is OFF.
PH2 TOUCH & GO function
IfyoudonotwanttokeepPRE-HEATINGpermanentlyactive,andyouwanthot
waterimmediatelyready,thedomestichotwatercanbepre-heatedjustafew
moments before meeting the request.
Thisfunctionallowsyou,byopeningandclosingthetap,toactivatetheinstanta-
neous pre-heating that prepares the hot water for that request only .
PH3 SMART PRE-HEATING function
Whenthisfunctionisactive,post-circulationfortheendoftheheatingrequestis
enabled with the three-way valve positioned on DHW until one of the following
conditions is met:
- DT (delivery - return probe) < 2 °C
- Post-circulation duration > 20 sec
- Return temperature > 65 °C
3.6 Special DHW functions
Parameter 511 is used to activate special functions during the modulation phase
in DHW mode. These functions improve the boiler performance in particularly
hardoperatingconditions(suchasveryhighinletwatertemperatures,verylow
flowrates,useincombinationwithsolarstoragetanks).
0 No special function active (default value)
1
Application of a ow switch/owmeter start-up delay (parameter
510 - SERVICE)
2
Intheeventofswitch-o󰀨duetoovertemperatureinDHWmode
(witharequestinprogress),thefaniskeptatswitch-onspeedto
reduce the restart standby time
3 Absolute DHW thermostats
4 Smart DHW anti-oscillation function
5 All four previous functions active

Beretta Ciao 25C Specifications

General

Brand	Beretta
Model	Ciao 25C
Category	Boiler
Language	English