23
boiler. Only when the pellet central heating cooker temperature is sufficient (the value is set from
control panel) is the 3-way valve powered, and so closes the gas boiler circuit and opens the
Smart
120
central heating cooker circuit.
BR
OW
N
W
IR
E
YE
LL
OW
/G
RE
EN
W
IR
E
BLU
E
W
IR
E
BLA
CK
W
IR
E
3-WAY VALVE
NOTE: The brown wire can be used to control any service relay.
Connection to the room thermostat
A bridge clamp is installed on the rear of the central heating cooker (free contact), which is useful to connect
any room thermostat.
In this way, connecting an external thermostat with the function to open or close the
contact depending on the heat demand will be easier.
OPERATION PRINCIPLE
Open contact:
1. The central heating cooker switched directly to economy mode operation
“T-
OFF ECONOMY”
minimizing working output.
2. The central heating cooker pump turns off.
3. The temperature in the central heating cooker increases due to thermal
inertia until reaching the temperature set on
“SET H2O” and
displaying
“T-
H2O ECONOMY”
on the screen.
4. The central heating cooker will now automatically switch off if there is at least
one of the following conditions:
If it remains in Economy mode operation
“T-H2O ECONOMY”
for a time
set on Pr44 (30-minute default setting).
If it exceeds the temperature differential set on Pr43 (factory set value
5°C) or
H2O Temperature > (
“SET H2O”
+ Pr43)
NOTE: T
he pump is calibrated to start at temperatures ≥ 83°C in all conditions
(see parameter table).
WARNING: If a room sensor on the remote control is also enabled
(see page 44
– “
Menu 04”
)
, the
central heating cooker enters the economy mode when both cases are satisfied.
The room thermostat operation is excluded if one of the three OVEN OUTPUT VALUE is set.
The central heating cooker will switch on automatically if both the following conditions occur:
If the contact of the room thermostat is closed.
If it goes below the temperature differential set on Pr43 (5°C default setting) or
Temperature H2O <
(
“SET H2O”
– Pr43)
.
If the above-described condition occurs when the central heating cooker is still running the switch off cycle, it
is appropriate to wait until it runs out.
