© 2009 Merten by Schneider Electric
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Push-button, 4-gang plus with room temperature control unit and IR receiver
Multifunction with RTCU and FanCoil 1817/1.0
Getting to know and parameterising the room temperature control unit
You can set the system to monitor the actual external
temperature cyclically. If the controller does not receive
any new values during this time, a read request is sent.
If no new value is received in response to this, the actu-
al external temperature is equalised with the actual in-
ternal temperature.
If you do not want the system to monitor the actual ex-
ternal temperature, set the value here to "0".
Set temperature drop detection
When temperature drop detection is switched on, the
room temperature control unit checks whether the tem-
perature has changed by the set temperature difference
within three minutes. If this is the case, the system
switches to frost/heat protection mode for a period that
you can set. After this time has elapsed, the controller
switches back to the operation mode that was set previ-
ously.
You can set which temperature value or sensor the tem-
perature for the measurement is taken from.
If using an external sensor, the actual temperature can
consist of the temperature measured by the room tem-
perature control unit and the external temperature, de-
pending on the parameterised weighting (see
"Correcting and setting the actual temperature").
Set closed-loop control for heating and additional
level
This tab only appears if you set the "heating" or "heating
and cooling" control type in the "Control general" tab.
Here, you can set which heating control type should be
activated. For PI controls, you can select between five
standard system types, for which the recommended
parameters have already been preconfigured. Howev-
er, if you have sufficient specialised knowledge, you
can also set the control parameters as required.
For 2-step control, set the hysteresis here.
Here, specify the settings for the second heating level.
Actual temperature (resulting)
Parameter
Setting
Correct internal actual temperature
Factor (-128 ... 127) * 0.1 K
-128 ... 127,
0
Take actual external temperature
partially into account
5 % to 100 %,
No
Monitor actual external temperature
every ... min (0-255)
0 ... 255,
60
Send actual temperature if
difference is ... K
No
0.1 to 2.0 K,
0.2 K
Send actual temperature
every ... min
No
3 to 60 min,
10 min
Temperature jump
Parameter
Setting
Temperature jump detection
No
+/- 0.2 K / 3 min ... +/- 4.0 K /
3 min
Duration of the frost/heat protec-
tion in event of temperature jump
(10-60 min)
Frost protection during heating
operation
Heat protection during cooling
operation
10 - 60 min,
20 min
Temperature measurement
Of actual internal temperature
Of actual external temperature
Of actual internal or external tem-
perature
Of (resulting) internal temper-
ature
Control heating
Parameter
Setting
Basic level
Direction of the controller
Normal
Inverted
Correcting variable output
PI control (switching)
PI control (continuous)
2-step control (switching)
2-step control (continuous)
Select heating system
Adjustment via control param-
eter
Warm water heating (5 K/
150 min)
Underfloor heating (5 K/
240 min)
Electric heating (4 K/100 min)
Air convector (4 K/90 min)
Split unit (4 K/90 min)
Hysteresis
0.3 K - 2.0 K,
0.5 K
Proportional range for heating in
0.1 K (10-255)
10 - 255,
40
Reset time for heating (1-255 min)
No
, 1 - 255
Control heating
Parameter
Setting
Use additional level
Yes
No
Direction of the controller
Normal
Inverted
Correcting variable output
2-step control (switching)
2-step control (continuous)
Interval
Factor (10 ... 100) * 0.1 K
10 ... 100,
20
Hysteresis
0.3 K - 2.0 K,
0.5 K
