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if
I28
=1 or 2, the fan stays on at speed 1.
if
I28
=4 or 5, the fan stays on at speed selected manually.
Speed 1 is activated and deactivated together with the heating/cooling output.
The hysteresis of speeds 2 and 3 is calculated automatically at 20% of the FB band (see
“3 speed on-off motor speed
control logic with on/off outputs” page 29
).
Example:
if
I18
=0.5°C, FB=2°C, the hysteresis of speeds 2 and 3 is 0.4°C in heating mode.
if
I19
=1.0°C, FB=3°C, the hysteresis of speeds 2 and 3 is 0.6°C in cooling mode.
N.B.: parameter
I25
is not used.
Wiring diagram
V1
N L
DI
1
GN
D
DI
2
AI1 GN
D
AI2
DO
1
DO
2
DO
3
DO
4
GN
D
AI3 GN
D
T1
T2
S1
S2
T3
R1
M1
I
II
III
DO
5
CO
M
N
L
230V
ac
A +
B
-
MODBUS RTU
(TH-xMxxx)
