3
x
Operation
FA ROTEX RoCon mb • 09/2017
23
The cooling slope is defined through the four following param-
eters:
1. [Start T-Out Cooling]
2. [Max T-Out Cooling]
3. [T-Flow Cooling start]
4. [T-Flow Cooling max]
During weather-dependent T-HS control, the user can increase
or decrease the target feed temperature by a maximum of 5 K
with the parameter [Cooling Setpoint adj]. A temperature re-
duction is limited by the parameter [Min T-Flow Cooling].
Detailed explanations and possible setting values of this function can be found in
chap. 6.2.3.
3.6.4 Weather-dependent T-HS control
When weather-dependent T-HS control is active, the target feed
temperature (see info parameter [T-HS Setpoint], chap. 6.10) is
automatically determined according to the set heat/cooling slope
depending on the outside temperature.
This function is activated in delivery condition. It can only be
deactivated (fixed value control) or reactivated with a technician
code.
With the optional
RKRSCA1
outside temperature sensor
(
14 10 39
) that is installed on the north side of the building,
weather-dependent T-HS control can be further optimised. If no
RKRSCA1
is installed, the RoCon mb controller uses the outside
temperature value measured at the heat pump outdoor unit.
If the room station (
RoCon U1
,
15 70 34
) is additionally con-
nected to the ROTEX HPSU monobloc compact, the target feed
temperatures are controlled depending on the weather and room
temperature (see tab. 6-3 / tab. 6-16, parameter [Room In-
fluence]).
The activation or deactivation of this function is takes place via
the [HC Function] parameter in the
"Configuration"
rotary
switch setting at the
"HC Configuration"
level.
– [HC Function] parameter = 0: Weather-dependent T-HS con-
trol
– Parameter [HC Function] = 1: control according to fixed target
feed temperature
– For heating mode: parameter [T-Flow Day] or parameter
[T-Flow Night]
– For cooling mode: parameter [T-Flow Cooling]
With connected mixer module
Setting of the heat/cooling slopes and the activation of weather-
dependent T-HS control for the assigned heating circuit are
carried out in the same way as described above.
The assigned heating circuit can be operated as a:
a) Mixer add-on
The outside temperature of the outside temperature sensor
connected to the ROTEX HPSU monobloc compact is
transmitted to the mixer module via the CAN bus.
or as a
b) Mixer add-on with zone control
A separate outside temperature sensor must be connected
(
RKRSCA1
,
14 10 39
) to the mixer module. The
assigned heating circuit is controlled according to the outside
temperature relevant to this zone.
With activated terminal function, the mixer module can be op-
erated and the settings for the assigned heating circuit under-
taken via the RoCon B1 control panel of the ROTEX HPSU
monobloc compact.
In combination with the RoCon U1 room station (
15 70 34
),
the mixer module can also control the assigned heating circuit
completely independently and irrespective of the ROTEX HPSU
monobloc compact.
More detailed explanations and possible setting values for this function can be
found in chapters 6.2.3 and 6.13.2.
3.6.5 Frost protection function
The integrated heating circulation pump is switched on at an
outside temperature below the [T-Frost Protect] parameter value
in order to prevent the heating system from freezing.
In addition, the flow, storage and connected room temperature
sensors are also constantly monitored. If the measured temper-
ature at one of these sensors falls to less than 7 °C (less than
5 °C at room temperature), the antifreeze function is also acti-
vated.
1
Parameter [Start T-Out Cooling]
2
Parameter [Max T-Out Cooling]
3
Parameter [T-Flow Cooling start]
4
Parameter [T-Flow Cooling max]
5
Parameter [Min T-Flow Cooling]
6
Target room temperature
7
Cooling mode possible
T
A
Outside temperature
T
V
T-HS
―
Cooling slope
---
Possible parallel cool-
ing slope shift
Fig. 3-16 Cooling slope parameter dependency
If the mean outside temperature falls below 4 °C when
"Cooling"
operating mode is active, the operating mode
automatically switches to
"Heating"
.
Renewed automatic operating mode switching to
"Cooling"
only
takes place:
– if a room thermostat is connected to plug connection J16
(cooling
) and
– the room thermostat's switching contact is closed and
– the mean outside temperature increases to over 10 °C
again.
Weather-dependent T-HS control has no influence on
the target feed temperature in the case of a hot water
circuit request.
If, in the
rotary switch position, the message
"n.A." is displayed, no valid terminal address has been
assigned to the control unit yet.
If the "n.A." message is still displayed, it may be necessary to
update the device software in order to use the terminal function.
Contact the ROTEX Service Team for this.
