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TH-2xxSx1 with EC motor
• HEATING/HEATING mode (
M01
=1)
The “
HEAT
” icon is on to indicate that heating mode is active.
The regulation logic is as follows:
ON
OFF
Temp.
Outputs
BHS
(
I07
)
ECM speed 1
Temp.
Fan
ECM speed 3
HH
(
I18
)
HH
(
I18
)
DIFF
(
I20
)
DO1
DO2
FB
(
I27
< 100%)
AO1
I27 = 100%
If the operating temperature drops below
I07
- (
I18
: 2) relay
DO1
is activated.
Icon turns on if
M02
=2 and icons and
both turn on if
M02
=1 or 3.
The fan (output
AO1
) is activated at speed 1 after startup delay
I36
if
M02
=2.
The fan (output
AO1
) starts immediately at speed 1, regardless of the startup delay I36, if
M02
=1 or 3.
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
)].
If the operating temperature drops below
I07
- (
I18
: 2) -
I20
, stage 2 is activated (output
DO2
)
If the temperature rises above
I07
+ (
I18
: 2) -
I20
, stage 2 is deactivated. if
M02
=2, icon
turns off.
If the operating temperature increases to
I07
- (
I18
: 2) the speed remains constant at speed 1, until the operating tem-
perature exceeds
I07
+ (
I18
: 2)
Icon , or icons and
(if
M02
=1 or 3) turn off and, depending on the value of
I28,
the fan turns off after 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
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
DO
2
V2
R2
AO1 GN
D
230V
ac
A +
B
-
MODBUS RTU
(TH-xMxxx)
