H2
H4
AIR
N540022B
8mm
0.2-1mm
2
+ A B -
A
18 - EN
Electronic board connections - 3301557
+BA-
serial connection for wall-mounted remote
control (respect AB polarity)
H2*
hot water temperature probe (10 kΩ)
M1
DC inverter fan motor
Y1
water solenoid valve (230V/ 50Hz 1A output
voltage)
L-N
230V/50Hz electrical power supply
BO
boiler consent output (free contact max 1A)
CH
chiller consent output (free contact max 1A)
*
If after switching the power on the board
detects the H2 probe, start-up occurs in normal
conditions with the minimum water temperature
when heating (30°C) and maximum when cooling
(20°C).
The board also has a function when there is no
probe, in such cases the fan stop minimum and
maximum thresholds are ignored.
Rigid or flexible wires with a 0.2 to 1 mm² cross-section
(0.75 mm² if two wires are connected to the same terminal
block) can be inserted in the 4 terminal blocks (ref. A) for
connection of the wall-mounted controller. If the wires
have wire end ferrules with a plastic collar, the maximum
cross-section is 0.75 mm².
Strip 8 mm of the wire, then if the wire is rigid, you can
insert it easily whereas, if it is flexible, it is advisable to use
long nose pliers.
Push the wire completely in and check that it is anchored
by pulling it gently.
3301557 - ELECTRONIC BOARD CONNECTIONS
