15
X6
1
34
B3-
MULTI
MULTI
In NTC: clamps 1 -2, jumper between
1 and 2
In. 0..10 V max input current = 0.75 mA
(clamps 2 – 3, jumper disconnected)
In. 4..20 mA (clamps 2 – 3,
jumper between 2 and 3)
2
35
B3-
MULTI
MULTI
3
36
B3-
MULTI
MULTI
X3
1
21
TX-RX+
RS485 serial
2
22
TX-RX-
RS485 serial
3
23
GND
Reference for serial
X4
1
26
D1
D1 digital input
Max voltage towards GND with input open
= 24 Vdc
2
27
GND1
ID1 digital input reference
3
28
D2
D2 digital input
Max current towards GND with contact
closed = 6.5 mA
Min current towards GND with contact
closed = 3 mA
4
29
GND2
ID1 digital input reference
SV1
LED
Connection flat to the external
LED synoptic
10 poles on flat
8.9.
INPUTS AND OUTPUTS
INPUTS
WS
water temperature probe. Optional and can be set from the terminal, used for the consent for dehumidification and
for the "Booster" function.
OUTPUTS
FAN1
fan 230 Vac on/off control output speed 1
FAN2
fan 230 Vac on/off control output speed 2
FAN3
fan 230 Vac on/off control output speed 3
CP
compressor 230 Vac on/off control output on Triac
8.10. DEHUMIDIFICATION
FUN-
CTIONING LOGIC FUNCTION
When the summer (dRY) mode is se-
lected, if the humidity detected is grea-
ter than the humidity set point, the FAN
output is activated and after 30” (“de-
lay CP 30” parameter) the compressor
control CP output is activated. When
exiting this mode or the humidity con-
ditions do not require dehumidification
(humidity detected lower than set point
humidity - differential for dehumidifica-
tion), the compressor stops and after
30” the fan output also stops FAN (“De-
lay FAN 10” parameter).
The activation of ventilation and of the
compressor can also depend on the
temperature of the plant water when a
water temperature probe is set. In this
case, only if the temperature of the wa-
ter is lower than a water set point (less
hysterisis of 1°C) will the dehumidifica-
tion parts start to function.
IMPORTANT: every time the compres-
sor switches on it must remain active
for a minimum time fixed by the “Cycle
CP ON 300” ” parameter, even if there
is no consent from the humidistat.
The FAN always switches off after the
CP compressor, unless managed by
the "Booster" function.
8.11. DEFROST
FUNCTIONING
Timed compressor functioning for eva-
porating coil defrosting: compressor
switch off for a time equal to "Defrost
Duration" every interval of time equal to
“Time between Defrost" with fan active.
Whenever compressor consent is mis-
sing during the defrost cycle (whether
because the humidistat set point has
been reached or for the passage to the
Winter of Stand-by mode), the defrost
timing continues and remains indicated
by the
. symbol. In this case any re-
quest for activation of the compressor
will not be performed until the end of
defrost timing, (Defrost Duration).
N.B.: Defrost has priority over the mini-
mum functioning time of the compres-
sor “Cycle CP ON 300” ”.
8.12. WINTER
FUNCTIONING
MODE
„BOOSTER“ function: If the room tem-
perature is < 18 °C and the temperatu-
re of the water that feeds the machine
coils (WS) is > 33 °C, the fan functions
