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15. Timer extension mode
If the “energy saving”, ”not occupied holiday” and time zone modes are active, the operating setpoints are calculated in relation
to parameters
I12
(economy offset) and
I13
(“not occupied holiday” offset).
It is possible to bypass these functions for a certain time (parameter
I47
) and to maintain control with the base setpoints, by
activating timer extension mode.
Timer extension mode can be activated manually by setting parameter
MOC
to
OC
(see
“MODE button functionality” page 9
).
Once activated, a delay equal to the value of
I47
must expire before normal operation resumes.
16. Fancoil with EC motor (models TH-0xxSx1, TH-1xxSx1, TH-2xxSx1)
Parameter
M13
=0.
Device is able to control 2 EC motors with parameter
M14
.
If
M14
=0, 2 outputs are used to control the EC motor: one relay output and one 0...10V analogue output.
When the motor starts, the relay output is activated first, while the analogue output remains at 0V.
After 1 second, the analogue output is also activated.
When the motor is stopped, the analogue output returns to 0V.
After 1 second, the relay is deenergized.
If
M14
=1, only the analogue 0…10V output is activated to control the EC motor, without the auxiliary relay.
• EC motor automatic speed control logic with on/off outputs
Depending on the value of the stage 1 differential, a fan temperature band (FB) is set, within which the fancoil speed can
vary from speeds 1 to 3.
Hysteresis
0.5 - 1.0 °C
> 1.0...1.5 °C
> 1.5...2.0 °C
FB
2.0 °C
3.0 °C
4.0 °C
ON
OFF
Temp.
HH
(
I18
)
Output
BHS
(
I07
)
ECM speed 1
Temp.
FB
Fan
ECM speed 3
(
I27
< 100%)
DO1
AO1
I27 = 100%
The graph refers to heating mode operation.
Set the EC motor parameters as follows:
- Set the voltage corresponding to the minimum EC motor
speed with parameter
I29
.
- Set the voltage corresponding to the maximum EC motor
speed with parameter
I30
.
- Set parameters
I32
,
I33
,
I34
for speeds 1, 2, 3 respec-
tively.
Example: if
I29
=1V,
I30
=8V and
I32
=10%, speed 1 cor-
responds to 1.7V → [
I32
x (
I30
-
I29
) +
I29
]
Automatic speed control is linear over the range of speeds 1
to 3, while manual control simply sets a given speed (see
“4.
Quick access parameter setting” page 8
).
To set speed 1 to the minimum EC motor speed, set
I32
to 0.
To set speed 3 to the maximum EC motor speed, set
I34
to 100.
To set speed 2 to the midpoint between speeds 1 and 3,
set
I33
to 50.
- Set
I27
to define the point at which maximum speed is
reached within the fan band.
N.B.: parameters
I25
and
I26
are not used in this application.
The activation/deactivation of the fancoil at speed 1 correspond to the activation/deactivation of stage 1.
