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S
I
U
10.2
H4 H2
N276660C
DATA I/O
LED
H4
H2
KE
N
L
N
L
KE
KE
B3V151 Connection Diagrams with seasonal switching
L-N
Electrical power supply 230V-50 Hz
EV
Permission input
V1
Maximum fan speed (1,400 rpm)
V2
Medium fan speed (1,100 rpm)
V3
Minimum fan speed (680 rpm)
V4
Supersilent speed (400 rpm).
Y1
Water solenoid valve (230 V/ 50 Hz 1A output
voltage)
Y2
Mobile suction panel commander (power output
230V/ 50Hz 1A)
RS
RS version cabling
HRS
water probe for RS 10 kΩ
M1
DC inverter fan motor
KE
Auxiliary relay (not included in the supply)
Wall control with thermostat, summer/winter selector and
speed selector in connection with B4V642.
For 2-pipe units.