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30. Regulation (Model TH-1xxSx1)
All the graphics below refer to automatic speed control.
• HEATING mode (
M01
=0)
The “
HEAT
” icon is on to indicate that heating mode is active.
The regulation logic is as follows:
ON
OFF
Temp.
HH
(
I18
)
Output
BHS
(
I07
)
ECM speed 1
Temp.
FB
Fan
ECM speed 3
(
I27
< 100%)
DO1
AO2
I27 = 100%
- Operation with
M02
=0 or 2 (digital output
DO1
does not
control an electric resistance).
If the operating temperature drops below
I07
- (
I18
: 2)
relay
DO1
is activated and the fan starts (output
AO2
)
at speed 1 after the startup delay
I36
has expired, after
which the speed increases as the operating tempera-
ture falls, arriving at speed 3 when the operating tem-
perature is below
I07
- (
I18
: 2) - [
I27
x (FB -
I18
)].
The icon turns on to indicate that heating is active.
If the operating temperature increases to
I07
- (
I18
: 2)
the speed remains constant at speed 1 until the operat-
ing temperature rises above
I07
+ (
I18
: 2).
At this point, icon turns off and, depending on the
value of parameter
I28,
the fan either stops or continues
running:
if
I28
=0 o 2, the fan stops,
if
I28
=1 or 3, the fan stays on at speed 1.
if
I28
=4 or 6, the fan stays on at speed selected manu-
ally.
- Operation with
M02
=1 or 3 (digital output
DO1
controls an electric resistance).
If the operating temperature drops below
I07
- (
I18
: 2) relay
DO1
is activated and the fan starts immediately at speed
1 regardless of the startup delay
I36
. The speed then increases as the operating temperature falls, arriving at speed 3
when the operating temperature drops below
I07
- (
I18
: 2) - [
I27
x (FB -
I18
)].
Icons and
turn on to indicate heating with electric resistance.
If the operating temperature increases to
I07
- (
I18
: 2) the speed remains constant at speed 1 until the operating tem-
perature rises above
I07
+ (
I18
: 2).
At this point, icons and
turn off and, depending on the value of
I28,
the fan either stops after a delay
I35
or stays
on for air recirculation:
if
I28
=0 or 2, the fan stops after delay
I35
.
if
I28
=1 or 3, the fan stays on at speed 1.
if
I28
=4 or 6, the fan stays on at speed selected manually.
N.B.: if the minimum thermostat function is active, the thermostat itself must be closed when the valve is in regulation,
otherwise the fan will not start. If, on the other hand, the electric resistance turns on, the fan starts immediately regardless
of the position of the minimum thermostat.
Wiring diagram
N L
DI
1
GN
D
DI
2
AI1 GN
D
AI2
DO
2
GN
D
AI3 GN
D
T1
T2
S1
S2
T3
CO
M
N
L
M1
0..
10
V
~
L
N
+
-
DO
1
V2
R1
GN
D
230Vac
AO2
A +
B
-
MODBUS RTU
(TH-xMxxx)
