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31. Regulation with EC motor (Model TH-2xxSx1)
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
AO1
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
AO1
) at
speed 1 after startup delay
I36
. The speed then increases
as the operating temperature drops until it reaches speed
3 when the operating temperature falls 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 operating
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 manually.
- 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 drops until it reaches speed
3 when the operating temperature falls 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).
Icons and
are now off and, depending on the value of
I28
, the fan stops after delay
I35
or remains active 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
3
GN
D
AI3 GN
D
T1
T2
S1
S2
T3
CO
M
N
L
M1
0..
10
V
~
L
N
+
-
V1
R1
DO
1
AO1 GN
D
230V
ac
A +
B
-
MODBUS RTU
(TH-xMxxx)
