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FA ROTEX RoCon mb • 09/2017
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Operation
If the antifreeze function is active, the display of the RoCon mb
control unit displays the
symbol next to the time on the
standard display.
If the heating feed temperature falls below 7 °C, the ROTEX
HPSU monobloc compact heats until the heating feed temper-
ature reaches at least 12 °C.
The function is ended if the outside temperature rises above the
set [T-Frost Protect] parameter value + 1 K and also there is no
other activation condition.
3.6.6 Interlink function
Setting the parameter [Interlink fct] = On enables the ROTEX
HPSU monobloc compact to include two different target feed
temperature values in control.
This applies to both weather-dependent control and in the case
of control according to a fixed target feed temperature (see
chap. 3.6.4).
One possible application is e.g. the additional integration of an
HP convector in a surface heating and cooling system.
Prerequisite: 2 switching contacts are connected to ROTEX
HPSU monobloc compact plug connection J16 (e.g. room ther-
mostats).
– Parameter [Interlink fct] = Off: deactivated
– Parameter [Interlink fct] = On: evaluation of the heating
and cooling
switching contacts at plug connection J16 on
the RoCon BM1 printed circuit board.
Activation of cooling mode only by switching the operating
mode to "Cooling" (see chap. 3.4.2).
Setting of the parameter [Room thermostat] is no longer eval-
uated.
a) Open switching contacts: only frost protection active
b) "Heating" or "Automatic 1" / "Automatic 2" operating mode
active during the switching cycles in day mode.
– Closed heating
switching contact = IL1:
The system is regulated to the normal target feed temper-
ature as per the parameter settings in the
"HC Configura-
tion"
>
"Heating"
level.
– Closed cooling
switching contact = IL2:
The system is regulated to the increased target feed tem-
perature (normal target feed tempe value of the
parameter [T-Flow CH adj]. Priority if both switching con-
tacts are closed!
c) "Cooling" operating mode active.
– Closed heating
switching contact = IL1:
The system is regulated to the normal target feed temper-
ature as per the parameter settings in the
"HC Configura-
tion"
>
"Cooling"
level.
– Closed cooling
switching contact = IL2:
The system is regulated to the reduced target feed tem-
perature (normal target feed temperature - value of the
parameter [T-Flow Cooling adj]. Priority if both switching
contacts are closed!
Detailed explanations and possible setting values of this function can be found in
chap. 6.2.1.
3.6.7 Additional alternative heat generator
The heat supplied by an alternative WEZ must be fed to the un-
pressurised storage tank water in the ROTEX HPSU monobloc
compact hot water storage tank.
– On use of the optional BUxx backup heater, this is carried out
due to the design installation situation.
– On use of an alternative WEZ (e.g. gas- or oil-fired boiler), this
can be hydraulically integrated
a) unpressurised via the connections (solar feed and solar
return) of the hot water storage tank
or
b) in the case of ROTEX HPSU monobloc compact …B
device types, via the integrated pressurised solar system
heat exchanger.
The parameter [Function Heating Rod] setting is used to define
whether any additional heat generator (WEZ) is available for hot
water preparation and heating support, and which.
– 0: no additional WEZ
– 1: optional BUxx backup heater (connection via connector
XBUH1)
– 2: alternative WEZ undertakes hot water preparation and
heating support. To request the WEZ, relay K3 on printed cir-
cuit board RTX-EHS is switched.
– 3: alternative WEZ 1 (optional BUxx backup heater) under-
takes hot water preparation and alternative WEZ 2 under-
takes heating support. To request WEZ 1, relay K3, and to
request WEZ 2, relay K1, on printed circuit board RTX-EHS is
switched respectively. Observe warning notice!
The function of an additional alternative WEZ is also influenced
by the settings of parameter [Equilibrium Func.] (see chap. 6.2.1)
and parameter [Equilibrium Temp] (see chap. 6.2.2).
Detailed explanations and possible setting values of this function can be found in
chap. 6.2.1.
If off-peak functions are activated;
–Parameter [HT/NT Function] = 3
or
–parameter [SMART GRID] = 1,
operation of the heat pump can be shut off completely for a
limited period of time by the utility company. In these cases, reg-
ulation is not possible even in frost protection conditions, and the
device's internal heating circulation pump is not switched on.
These situations are recognisable if the "Overview" information
level's (see chap. 3.4.1) "Ext" operating data field displays the
value "HT" or "SG1".
CAUTION!
Unsuitable feed temperatures can cause dam-
age to the floor heating system or dew formation
on cooling surfaces.
●
Limit target feed temperatures to suitable
temperature ranges.
●
Design heat distribution areas with different
design temperatures as hydraulically
separate heating circuits.
If necessary, design heating circuits with lim-
ited target feed temperatures as mixer cir-
cuits, and regulate with a mixer module.
