3
x
Operation
FA ROTEX RoCon mb • 09/2017
13
In this operating mode, the ROTEX HPSU monobloc compact is
switched to Stand-by mode. The
frost protection function
(see
chap. 3.6.5) is maintained. In order to maintain this function, the
system may not be disconnected from the mains.
All controllers integrated in the RoCon system via the CAN bus
are primarily also switched to the "Standby" operating mode.
Operating mode Reducing
Reduced heating mode (lower target room temperature) ac-
cording to the target feed temperature set for reducing mode in
the parameter [T-Reduced] (see chap. 3.4.4).
Hot water preparation according to the set target hot water tem-
peratures and switching cycles in the hot water time program
[DHW Program 1] (see chap. 3.4.5).
Operating modes Heating, Cooling
Heating, cooling mode according to the target room temperature
set in the parameter [T-Room 1 Setpoint] (see chap. 3.4.3).
A connected outside temperature sensor (weather-dependent T-
HS control) or a connected room station also influence the target
feed temperature (prerequisite: parameter [HC Function] = On).
Hot water preparation according to the set target hot water tem-
peratures and switching cycles in the hot water time program
[DHW Program 1] (see chap. 3.4.5).
Operating mode Summer
Hot water preparation according to the set target hot water tem-
peratures and switching cycles in the hot water time program
[DHW Program 1] (see chap. 3.4.5).
All controllers integrated in the RoCon system via the CAN bus
are primarily also switched to the "Summer" operating mode.
Operating mode Automatic 1 (time program)
Automatic heating and setback mode according to the permanent
time programs (see chap. 3.4.7):
– [HC Program 1]
– [DHW Program 1]
Operating mode Automatic 2 (time program)
Automatic heating and setback mode according to the permanent
time programs (see chap. 3.4.7):
– [HC Program 2]
– [DHW Program 2]
Tab. 3-6 Resistance values for evaluating the EXT signal
Besides these operating modes, different temporary heating pro-
grams (see tab. 3-7) are available that are carried out with priority
after activation.
* only with technician code.
Tab. 3-7 Overview of temporary time programs
Fig. 3-8
Standard display in the "Standby" operating mode
(above the frost limit temperature)
If the hot water readiness is in setback mode in the
active operating mode,
a temporary
"DHW Re-
heating"
can be set with the rotary switch setting
without having to change other standard settings (see
chap. 3.4.6).
Switching contact for external operating mode
switch-over
A potential-free switching contact connected via
ROTEX HPSU monobloc compact connection J8 at the "EXT"
terminals and wired with a resistor can also be used to switch
the operating mode from an external device (e.g. modem, …).
In this case, the switching contact functionality is dependent on
the parameter [Function BSC]:
– [Function BSC] = 0 (default setting): evaluation of the resist-
ance values (see tab. 3-6)
– [Function BSC] = 1: evaluation as a burner blocking contact.
If the switching contact is closed, the external heat generator
has priority.
Operating mode
Resistance
Tolerance
Standby
< 680
Ω
± 5 %
Heating
1200
Ω
Reducing
1800
Ω
Summer
2700
Ω
Automatic 1
4700
Ω
Automatic 2
8200
Ω
The resistances specified in tab. 3-6 function in a toler-
ance field of 5%. Resistances outside this tolerance
field are interpreted as an open input. The heat gener-
ator switches back to the previously active operating
mode.
The input is not considered for resistance values greater than
the value for "Automatic 2".
If several switching contacts are to be connected to the ROTEX
HPSU monobloc compact (e.g. Smart Grid, room thermostat),
the related functions may have a higher priority than external op-
erating mode switch-over. The operating mode requested by the
EXT switching contact is then possibly not activated, or is only
activated later.
Temporary
time program
Setting/Activa-
tion in the level
Rotary switch
setting
Information
DHW Install
DHW Install
Chap. 3.4.6
Party
Time Program
Chap. 3.4.7
Away
Holiday
Vacation
Screed*
Configuration >
HC Configura-
tion
Chap. 3.6.13
If a temporary time program (DHW Install, Party, Away,
Holiday, Vacation, Screed) is started during the se-
lected operating mode, control is carried out primarily
according to the settings for this time program.
