29
When the storage temperature drops below the set value
on the storage tank's thermostat, the boiler switches the
diverter valve towards the hot water circuit, activates the
circulator, and ignites the burner to meet the storage tank's
requirements.
The domestic hot water function has priority in the event of
a simultaneous request from the heating circuit.
2
Storage cylinder with probe
Connection to a storage cylinder with probe:
- complete the water circuit shown in Fig. 32
- connect the electrical connections for the diverter
valve (V) to contacts 16, 17 and 18 on the boiler's
terminal board (M)
- connect the storage tank's probe (S), which is sup-
plied as an accessory, to contacts 7 and 8 on the
boiler's terminal board (M)
- set the value of parameter 23 on the board to "2" (the
factory setting is "3")
S
M
S
V
12
11
9 10
8
7
M1
18
3
1
F
N
2
230V
SE
TA
CR
SS
16 17
14
13
Fig. 32
16
Domestic hot water phase
17
Heating phase
18
Neutral
The boiler will automatically recognize that an external
storage tank has been connected. The functionality of
the SUMMER/WINTER buttons and the domestic hot wa-
ter temperature adjustment will be activated on the con-
trol panel. The domestic hot water circuit can therefore be
managed from the control panel using the same methods
previously described.
Connect the diverter valve to the terminal board, keeping in
mind that contact 16 is powered on when the boiler is oper-
ating in "Domestic Hot Water" mode, contact 17 is powered
on when the boiler is in "Heating" mode, and contact 18 is
the common neutral wire.
The boiler heats water for domestic hot water purposes
whenever required, in both SUMMER and WINTER mode.
The temperature of the hot water can be adjusted by the
user by pressing the "+" or "-" buttons.
45
4
Fig. 33
The following value will appear on the left-hand display: "
4
",
while the right hand display will indicate the temperature of
the water being delivered to the domestic utilities in Celsi-
us. The temperature value will increase or decrease by one
degree each time the buttons are pressed.
The temperature can be adjusted to any value between 20
and 60 degrees Celsius.
4 4 Heating water temperature
adjustment
4 4 1 Adjustment without an external
climate control probe (optional)
The temperature of the water delivered to the heating sys-
tem's terminals can be adjusted by the user by pressing
the "+" or "-" buttons.
60
3
Fig. 34
The number "
3
" will appear on the left-hand display, while
the right hand display will show the set temperature value
in Celsius.
The temperature can be adjusted to any value between 10
and 80 degrees Celsius.
If the unit is equipped with a board for managing a low tem-
perature zone, the temperature of the zone itself is estab-
lished based on the parameters entered by the Technical
Assistance Centre.
