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The fan starts when the valve reaches the aperture defined in
I25
and after startup delay
I36
.
If the temperature continues increasing, the speed switches from speed 1 to speed 2 when the valve reaches the aper-
ture given in
I26
. The speed switches from speed 2 to speed 3 when the valve reaches the aperture given in
I27
.
Each speed is subject to a hysteresis of 20% of its activation point.
For example, for speed 3:
if
I27
=100%, speed 3 is activated when the valve reaches fully open and is deactivated when the valve closes by 20%
of
I27
, which is 80% of fully open in this case.
Icon
turns off when the valve closes again, in which case the fan stops if
I28
=0 or 3. The fan maintains speed 1 if
I28
=1 or 2. The fan maintains speed selected manually if
I28
=4 or 5.
Wiring diagram
N L
DI
1
GN
D
DI
2
AI1 GN
D
AI2
DO
1
DO
2
GN
D
T1
T2
S1
S2
M1
I
II
III
DO
3
CO
M
N
L
230V
ac
V1
AO1 GN
D
G
G0
24V
ac
Y G0
A +
B
-
MODBUS RTU
(TH-xMxxx)
