Rotex RoCon HP User manual

ROTEX Control
RoCon HP, RoCon U1,

RoCon M1
Operating instructions
Electronic controller for heat pumps
For the types
HPSU compact 304
HPSU compact 308
HPSU compact 508
HPSU compact 516
GB
Output 08/2013
For certified companies

List of contents
2FA ROTEX RoCon HP - 08/2013
1 Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.1 Observing instructions . . . . . . . . . . . . . . . . . . . . 3
1.2 Warning signs and explanation of symbols . . . . 3
1.2.1 Validity. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
1.3 Avoid danger . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.4 Proper use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2 Product description. . . . . . . . . . . . . . . . . . . 4
2.1 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
2.2.1 Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
2.2.2 Operating elements. . . . . . . . . . . . . . . . . . . . . . . . .5
3 Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
3.1 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
3.2 Basic functions and operating modes . . . . . . . . 7
3.2.1 System information (Info) . . . . . . . . . . . . . . . . . . . .7
3.2.2 Setting the operating mode . . . . . . . . . . . . . . . . . . .8
3.2.3 Temperature setting Daytime room temperature .10
3.2.4 Temperature setting Economy mode . . . . . . . . . .10
3.2.5 Temperature setting hot water generation . . . . . .10
3.2.6 Unplanned hot water generation . . . . . . . . . . . . . .10
3.2.7 Switching time program. . . . . . . . . . . . . . . . . . . . .11
3.2.8 System settings. . . . . . . . . . . . . . . . . . . . . . . . . . .12
3.2.9 Terminal function. . . . . . . . . . . . . . . . . . . . . . . . . .13
3.2.10 Quiet Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
3.2.11 SMART GRID . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
3.3 Special functions . . . . . . . . . . . . . . . . . . . . . . . 14
3.3.1 Manual Operation . . . . . . . . . . . . . . . . . . . . . . . . .15
3.4 Special system settings . . . . . . . . . . . . . . . . . . 15
3.4.1 Access rights (expert code). . . . . . . . . . . . . . . . . .15
3.4.2 Heat curve. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
3.4.3 Cooling characteristic curve . . . . . . . . . . . . . . . . .17
3.4.4 Weather-controlled flow temperature regulation . .17
3.4.5 Interlink function . . . . . . . . . . . . . . . . . . . . . . . . . .18
3.4.6 Legionella protection. . . . . . . . . . . . . . . . . . . . . . .18
3.4.7 Reset to factory settings (Reset). . . . . . . . . . . . . .18
3.4.8 Screed Program . . . . . . . . . . . . . . . . . . . . . . . . . .19
3.4.9 Relay and sensor test . . . . . . . . . . . . . . . . . . . . . .21
3.4.10 Settings for optional circulation pump . . . . . . . . . .21
3.4.11 Remote control via Internet . . . . . . . . . . . . . . . . . .21
4 Initial start-up. . . . . . . . . . . . . . . . . . . . . . . 22
4.1 Starting up a HPSU compact . . . . . . . . . . . . . . 22
4.2 Connect the optional RoCon devices and 
start them up . . . . . . . . . . . . . . . . . . . . . . . . . . 22
4.2.1 Starting up the mixer module RoCon M1 . . . . . . .22
4.2.2 Room station RoCon U1 starting up . . . . . . . . . . .23
5 Parameter settings . . . . . . . . . . . . . . . . . . 25
5.1 Explanation of the parameter tables . . . . . . . . 25
5.2 Rotary switch setting: Configuration . . . . . . . . 25
5.2.1 Level "Setup". . . . . . . . . . . . . . . . . . . . . . . . . . . . .25
5.2.2 Level "System Configuration" . . . . . . . . . . . . . . . .27
5.2.3 Level "HC Configuration" . . . . . . . . . . . . . . . . . . .29
5.2.4 Level "DHW Configuration" . . . . . . . . . . . . . . . . . .31
5.3 Rotary switch setting: DHW Install . . . . . . . . . 32
5.4 Rotary switch setting: Operating Mode . . . . . . 32
5.5 Rotary switch setting: Set Temp Day . . . . . . . 32
5.6 Rotary switch setting: Set Temp Night . . . . . . 33
5.7 Rotary switch setting: DHW Set Temp . . . . . . 33
5.8 Rotary switch setting: Time Programme . . . . . 33
5.9 Rotary switch setting: Remote Param . . . . . . . 34
5.10 Rotary switch setting: Info . . . . . . . . . . . . . . . . 34
5.11 Exit button: Special function. . . . . . . . . . . . . . . 35
5.12 Parameter level "Basic Configuration" . . . . . . 35
5.13 Parameter levels for the mixer module 
RoCon M1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
5.13.1 Rotary switch setting: Configuration, 
level "Setup" . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
5.13.2 Rotary switch setting: Configuration, 
level "Mixer Config" . . . . . . . . . . . . . . . . . . . . . . . 38
6 Faults and malfunctions. . . . . . . . . . . . . . .40
6.1 Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . 40
6.1.1 Current fault display . . . . . . . . . . . . . . . . . . . . . . 40
6.1.2 Reading the fault memory . . . . . . . . . . . . . . . . . . 40
6.1.3 Deleting the fault . . . . . . . . . . . . . . . . . . . . . . . . . 40
6.1.4 Rectifying faults. . . . . . . . . . . . . . . . . . . . . . . . . . 41
6.2 Emergency operation . . . . . . . . . . . . . . . . . . . 42
6.3 Fault codes . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
6.4 Configuration DIP switch. . . . . . . . . . . . . . . . . 45
7 Glossary. . . . . . . . . . . . . . . . . . . . . . . . . . . .46
8 List of keywords . . . . . . . . . . . . . . . . . . . . .47
9 Notes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .48
9.1 User-specific settings . . . . . . . . . . . . . . . . . . . 48
9.1.1 Switching time program. . . . . . . . . . . . . . . . . . . . 48
9.1.2 Parameter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
9.1.3 Databus addresses . . . . . . . . . . . . . . . . . . . . . . . 49
9.2 Notes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50

1xSafety
FA ROTEX RoCon HP - 08/2013 3
1Safety
1.1 Observing instructions
This instruction is the >> Original Version << in your language.
All the activities required for operation and setting the parameters
are described in this instruction manual. All parameters needed
for trouble-free operation have been configured at the factory.
ƔPlease read through this manual carefully before operating
the heating system or before adjusting the settings for it.
ƔMake a note of the preset values before you make any
changes to the unit configuration.
Relevant documents
– ROTEX HPSU compact; the associated installation and oper-
ating instructions the operating instructions for the end cus-
tomer and the operating manual for the operator.
– External unit for ROTEX HPSU compact; the associated
installation and operating instructions.
– When connecting to a ROTEX solar system; the associated
installation and operating instructions.
– If a different ROTEX heater or optional accessories are con-
nected; the associated installation and operating instructions.
– With connection of a ROTEX HP convectors; the associated
installation and operating instructions.
The guides are included in the scope of supply for the individual
units.
1.2 Warning signs and explanation of symbols
Meaning of the warnings
Warnings in this manual are classified according into their se-
verity and probability of occurrence.
DANGER!
Draws attention to imminent danger.
Disregarding this warning can lead to serious injury or
death.
WARNING!
Indicates a potentially dangerous situation.
Disregarding this warning can result in serious injury
or death.
CAUTION!
Indicates a situation which may cause possible
damage.
Disregarding this warning can lead to damage to
property and the environment.
This symbol identifies user tips and particularly useful
information, but not warnings or hazards.
Special warning signs
Some types of danger are represented by special symbols:
Electric power
1.2.1 Validity
Some information in this manual has limited validity. The validity
is highlighted by a symbol.
Only valid for ROTEX HPSU compact with heating and
cooling function
Valid/available only if a room station is connected
Valid/available only if a mixer module is connected
Order number
Notes related to order numbers are identified by the shopping
cart symbol .
Handling instructions
ƔInstructions on actions are shown as a list. Actions of which
the sequential order must be maintained are numbered.
ÎResults of actions are identified with an arrow.
Entry into a setting procedure
Exit from a setting procedure
1.3 Avoid danger
The ROTEX HPSU compact is state-of-the-art and is built to meet
all recognised technical requirements. However, improper use
may result in serious physical injuries or death, as well as
property damage.
To avoid danger, only operate the ROTEX HPSU compact:
– as stipulated and in perfect condition,
– with an awareness of the safety and hazards involved.
This assumes knowledge and use of the contents of this manual,
the relevant accident prevention regulations and the recognised
safety-related and occupational medical rules.
WARNING!
This unit is not intended for use by persons (including
children) with impaired physical, sensory or mental
faculties or persons with insufficient experience and/or
expertise unless supervised by a person responsible
for ensuring their safety or are given instruction by this
person on how to use the unit.
1.4 Proper use
The RoCon HP may be used only in ROTEX HPSU compact heat
pumps that have been approved for the ROTEX regulating
system RoCon. The ROTEX RoCon may be operated only 
according to the specifications in this manual.
Any other use outside the intended use is considered as im-
proper. The operator alone shall bear responsibility for any 
resulting damage.
For any work on the equipment, which extends above and
beyond the operation of the regulating system, you must observe
the details provided in the supplementary documents, particularly
with regard to safety instructions.

4FA ROTEX RoCon HP - 08/2013
2xProduct description
2 Product description
2.1 General
The Control RoCon HP is part of the ROTEX HPSU
compact.
It consists of the control panel PCB, the actors and
sensors and other components of the ROTEX regu-
lating system RoCon connected and the control unit
RoCon B1.
In this instruction manual we explain just the functions
and setting possibilities of the Control. More information
on the ROTEX HPSU compact and other equipment
components can be found in the supplementary 
documents.
The electronic, digital Control is able to automatically control all
heating, cooling and hot water functions for a direct heating
circuit, a storage tank charging circuit and optionally connectable
mixer module, depending on the heating unit in question.
It is responsible for all safety management functions of the
ROTEX HPSU compact. This executes a safety switch-off in the
event of a water shortage or undefined operating states.
A corresponding fault message shows the operator all the infor-
mation for fault causes.
All function settings for the ROTEX HPSU compact and the op-
tional RoCon equipment connected via the data bus are carried
out with the operating elements of the integrated operating part
RoCon B1 and displayed in clear text display on a coloured
backlit display.
The regulation data bus can be used to connect the ROTEX
HPSU compact to the following optional equipment:
– Room station RoCon U1 ( 15 70 34).
– Mixer module RoCon M1 ( 15 70 68).
In addition, the control unit RoCon HP has a frost protection
function for the direct heating circuit and the storage tank
charging circuit, as well as the facility for incorporation of an 
additional heat source (wood-burning boiler, solar system) via a
potential-free burner blocking contact or the potential-free AUX
contact.
The weather-controlled flow temperature regulation is more ac-
curate with the optional external temperature probe RoCon OT1
(15 60 70), which can be installed to the north of the building.
If the optional gateway RoCon G1 ( 15 70 56) is installed and
connected to the Internet, the ROTEX HPSU compact can be
conveniently monitored and operated by remote control using a
mobile phone (app).
The Control RoCon HP contains a timer which can be used to
set:
– 2 individually-adjustable timer programmes for room heating
and room cooling (direct heating circuit),
– 2 individually-adjustable timer programmes for hot water gen-
eration and
– 1 individually-adjustable timer programme for an optional cir-
culation pump.
Initial commissioning of the heating system is described in the in-
stallation manual of the ROTEX HPSU compact.
Certain menu items in the Control RoCon HP are only accessible
to the specialist heating technician. This security measure en-
sures that no undesirable malfunctions arise during operation of
the system through incorrect settings.
The room station RoCon U1 has the same operating panel as the
the RoCon B1 operating element integrated in the ROTEX HPSU
compact.
All settings for the allocated heating circuit can be carried out in
the same way as the operating unit. With activated terminal
function, all operating possibilities that are available on the inte-
grated operating unit are available, with the exception of certain
special functions (e.g. Manual Operation).
A connected mixer module RoCon M1 will also be operated, after
appropriate allocation, by the control unit RoCon B1 and/or the
room station RoCon U1.
2.2 Display and operating elements
1 Clear text display
2 Setting: Configuration
3 Setting: Remote Param
4 Rotary switch
5 Setting: Info
6 Setting: Operating Mode
7 Setting: Set Temp Day
8 Setting: Set Temp Night
9 Setting: DHW Set Temp
10 Rotary button
11 Setting: DHW Install
12 Setting: Time Programme
13 Exit button
Fig. 2-1 Arrangement of display and operating elements

2xProduct description
FA ROTEX RoCon HP - 08/2013 5
2.2.1 Display
All the operating steps are supported by appropriate displays in
the clear text display on a coloured background.
Menu guiding is available in 7 different languages 
(see section 3.2.8).
Malfunctions are generally indicated by a fault code and
a clear text fault message on the display.
For troubleshooting instructions refer to chapter 6.
The colour of the backlighting indicates the operational status
and the operational mode:
White: Standard lighting, normal operational diaplay.
Red: Fault status, depending on the type of fault, the
ROTEX HPSU compact continues to function with
restrictions.
Green: Operating mode with operator authorisation.
Blue: Operating mode with expert authorisation.
1 Date display
2 Status of refrigerant com-
pressor:
Flashing: Heat pump de-
mand active
Permanently on: Compres-
sor is in operation
: No connection to the
external unit
3 Display of expert login
4 Display time
5 Current flow temperature
6 Status heating circuit
7 Current outdoor temperature
8 Active operating mode
9 Status of hot water genera-
tion
10 Current storage tank temper-
ature
Fig. 2-2 Display of the Control - standard display
With activated screed function (see chapter 3.4.8) the upper line
on the display shows the symbol .
2.2.2 Operating elements
CAUTION!
Never operate the operating elements on the con-
troller with a hard, pointed object. This can cause
damage and can cause the control to malfunction.
If special key combinations or extended key pushes are required
for certain function, a separate note is made in each specific
section of this description.
Rotary switch
The rotary switch is used to gain rapid direct access (main
function level) to frequently required functions and setting 
possibilities.
Independent of the setting of the rotary switch, the
ROTEX HPSU compact operates in accordance with
the operating mode which was set in the switch position
"Operating Mode" or activated by a special 
programme.
Action Result
Rotating
Direct selection of the main function level allo-
cated to this switch position.
Tab. 2-1 Function of rotary switch
Rotary switch
The rotary switch can be used to navigate in the individual levels,
setting values can be selected, changed and these changes can
then be accepted by pressing briefly.
Action Result
Rotating
To the right (+): Increased regulation
To the left (–): Reduced regulation
tapping
Confirm, accept, selection and execute the
function.
Tab. 2-2 Functions of the rotary switch
Exit button
This button can be used to jump back to the previous display
within a menu display or a function / input can be interrupted.
This button can also be used to call up the special level
(see section 3.3).
Action Result
Brief actuation. – Jump back to the previous display or 
previous level or
– Cancellation of a special function or a
one-off active timer programme
Press for more
than 5 secs.
– Special level is called up.
Tab. 2-3 Functions of the exit button

6FA ROTEX RoCon HP - 08/2013
3xOperation
3Operation
3.1 General
DANGER!
If electrical components come into contactwith water,
this can cause an electric shock as well as cause
potentially fatal injuries and burns.
ƔThe displays and the buttons on the Control
must be protected from the effects of moisture.
ƔTo clean the Control use a dry cotton cloth.
Using aggressive cleaning agents and other
liquids can cause damage to equipment or lead
to an electric shock.
Maximum energy utilisation
The most effective energy utilisation is achieved by the
HPSU compact at the lowest possible return flow and
hot water temperatures.
At temperatures in excess of 50°C, the effectiveness
(COP) of the HPSU compact will be made worse by
the heatingsupport provided by the optional heater
(backup heater), depending on the outdoor temper-
ature.
The operating concept of the Control RoCon HP is structured in
such a way that the frequently required setting facilities are ac-
cessible quickly and directly in the mainfunctionlevel(selection
using the rotary switch) and that the less frequently required
setting facilities are arranged in a lower parameter level.
1
2
3
45
6
7
8
9
1 Operating Mode (section 3.2.2)
2 Set Temp Day (section 3.2.3)
3 Set Temp Night (section 3.2.4)
4 DHW Set Temp (section 3.2.5)
5 DHW Install (section 3.2.6)
6 Time Programme (section 3.2.7)
7 Configuration (section 3.2.8)
8 Remote Param (section 3.2.9)
9 Info (section 3.2.1)
Fig. 3-1 Illustration of main function level (rotary switch position)
Certain functions and parameters are restricted by access au-
thorisation and can only be adjusted by the heating expert
(see section 3.4.1).
In normal operating mode the rotary switch should be in position
.
After switching on and successful initialisation, the display auto-
matically shows the standard display with rotary switch position
.
In the first commissioning, the setting for language selection is
displayed first.
ƔSelect the language using the rotary switch.
ƔConfirm the changes with a brief push of the rotary switch.
Adaption to the special installation configuration is
carried out in the rotary switch position
"Configuration" (see section 3.2.8).
When the system is switched on, it regulates fully automatically,
based on the stipulations set in the Control RoCon HP, the
operation of the
– Room heating and the
– Sanitary hot water generation.
Independent of the setting of the rotary switch, the
ROTEX HPSU compact operates in accordance with
the operating mode set in the switch position 
"Operating Mode" or which has been activated
by a special programme.
If the user enters a value manually, this setting remains active
until the user changes it or until the programme clock forces an-
other operating mode.
The operating mode can be affected by additional functions:
– Interlink function
– Weather-controlled set value regulation
– Switching time programme
– Setting the temperature target value
– Room temperature controller
– Whisper mode
– Signal from the burner blocking contact (e.g. solar system)
– SMART GRID - Signal
– EVU (reduced cost tariff) - Signal
– Screed function
Button block
The operator panel of the RoCon HP can be blocked to prevent
inadvertent actuation (see fig. 3-2).
Unlocking can be carried out in the same way.
The prerequisite for this function is that, in the level "Setup", the
parameter [Keylock Function] is set to "On" 
(see chapter 5.2.1, tab. 5-1).
Keylock Function
On
Keylock Function
Keylock Function
Off
Fig. 3-2 Activating and deactivating the button block

3xOperation
FA ROTEX RoCon HP - 08/2013 7
3.2 Basic functions and operating modes
The safety settings of the ROTEX HPSU compact
hinder the operation of the heat pump if
– The outdoor temperature is <12°C and simultane-
ously
– The storage tank temperature is <30°C.
Without backup heater:
At an outdoor temperature <12°C, the storage tank
water needs to be heated up by an external heater to
>30°C.
With backup heater (BUH):
At an outdoor temperature <12°C and a storage tem-
perature <35°C, the backup heater (BUH) switches on
automatically to heat the water in the storage tank to
>30°C.
ƔIn order to accelerate the heating up process with
BUH, temporarily set the
– Parameter [Function Heating Rod] = "1" and
– Set parameter [Power DHW] to 9000 W.
– Set rotary switch to the operating mode and
Parameter [1x Hot Water] to "On".
Thawing (automatic function)
At low outdoor temperatures and corresponding humidity values,
the external heat pump unit may ice up. This icing impairs effi-
cient operation. The system detects this condition and automati-
cally starts the defrosting operation.
During the thawing mode, heat is drawn from the hot water
storage tank and the backup heater (BUH) is turned on, if re-
quired. Depending on the heat requirement for the thawing oper-
ation, heating of the direct heating circuit may be interrupted
during the thawing process.
After 8 minutes at most, the system returns to normal mode.
3.2.1 System information (Info)
In this rotary switch position, the rotary switch can be used to call
up all the system temperatures, the type of ROTEX HPSU
compact, various software information and the operating sta-
tuses of all system components, one after the other. The number
of displayed parameters depends on the connected components.
No settings can be made to these values.
ƔPlace the rotary switch in the "Info" position.
ÎStandard display is shown (see fig. 2-2).
ƔPress the rotary switch briefly.
ÎThe parameter overview is displayed.
ƔSelect the desired information level with the rotary switch.
ƔConfirm the changes with a brief push of the rotary switch.
ÎThe value is displayed (for example, see fig. 3-4).
ƔSelect the individual information with the rotary switch.
More detailed explanations and possible setting values forthis rotary switch setting
can be seen in chapter 5.10.
Display operating data
In the information level "Overview", the current operating data of
ROTEX HPSU compact are displayed on the overview display of
Control RoCon HP.
The display of the operating data is not divided into several
windows. By adjusting the rotary switch it is toggled between the
windows.
Short
designation Explanation of the displayed value
Mode Current mode of the heat pump:
"Sun": heating
"Snowflake": cooling
"Water tap": domestic hot water generation
"Water drops": Thawing function active
Ext Current energy mode of the heat pump:
LT: EVU function active and low tariff.
HT: EVU function active and normal tariff.
SGN: SMART GRID - Function active, normal
mode.
SG1: SMART GRID - Function active, rejection,
expensive power.
SG2: SMART GRID - Function active, multiple
operation, cheap power.
SG3: SMART GRID - Function active, start
command and multiple operation, cheap power.
- - -: No external mode active, heat pump works
in normal mode.
RT Parameter [Room thermostat] = Off: - - -
Parameter [Room thermostat] = On:
–"Sun": Heat demand
–"Circuit":No heat demand
Pump Actual output of the internal heating circulation
pump in %
EHS Actual output of the backup heater (BUH) in %
Mix1 Actual position of the mixing valve 3UVB
TV Actual inflow temperature of heating facilities (tV1)
TVBH Actual water outlet temperature at the hot water
storage tank
TR Actual return flow temperature of heating facilities
(tR1)
Tdhw Actual hot water temperature in the hot water
storage tank (tDHW1)
TA Actual outdoor temperature (measured by op-
tional temperature sensor RoCon OT1)
V Actual volume flow (flow rate) in the heating
system
TV2 Actual inflow temperature of heating facilities (tV2)
TR2 Actual return flow temperature of heating facilities
(tR2)
Tdhw2 Actual hot water temperature in the hot water
storage tank (tDHW2)
Tliq2 Actual coolant temperature (tDHW2)
TA2 Actual outdoor temperature (measured by tem-
perature sensor of the external heat pump)
quiet Shows the status of the whisper mode
Tab. 3-1 Explanation of operating data values

80%
0kW
100%
- - -
- - -
47°C34°C
8°C
1600l/h
27°C
34°C
32°C
34°C
8°C
47°C
37°C
Info
Overview
Water Pressure
Mode:
Ext:
RT:
Pump:
EHS:
Mix1:
TV:
TVBH:
TR:
tDHW:
TA:
V:
TV2:
TR2:
Tdhw2:
Tliq2:
TA2:
quiet: Off
Fig. 3-3 Display operating data
8FA ROTEX RoCon HP - 08/2013
3xOperation
Displaying the water pressure
On the Control RoCon HP, when it is switched on, you can
display the system pressure (water pressure) in the internal
circuit (direct heating circuit). The water pressure is available as
the first info parameter (see fig. 3-4).
The permissible range of water pressure during operation de-
pends on the ROTEX HPSU compact and the heating system.
The set values and threshold values must only be changed by the
heating technician. If the water pressure falls below the minimum
value (set parameter value), it must be increased by topping up
the system (see installation instructions of the HPSU compacts).
The pressure limits for the safety switch-off and the set
pressure can be adjusted in the parameter settings in
level "System Configuration".
Info
Overview
Water Pressure
T-HS
Water Pressure
Fig. 3-4 Info values display (e.g. system pressure)
3.2.2 Setting the operating mode
The selection of the operating mode with which the ROTEX
HPSU compact is to operate is undertaken on the rotary switch in
the setting "Operating Mode" .
The selected operating mode is activated by briefly pushing the
rotary switch.
Operating Mode
Standby
Reducing
Operating Mode
heating
cooling
Summer
Operating Mode
Summer
Automatic 1
Automatic 2
Operating Mode
Summer
Automatic 1
Automatic 2
Fig. 3-5 Changing over the operating mode 
(e.g.: from "Standby" to "Automatic 1")

3xOperation
FA ROTEX RoCon HP - 08/2013 9
ƔPlace the rotary switch in the "Operating Mode"
position.
ÎAn overview is displayed.
ƔSelect the desired operating mode with the rotary switch.
ƔConfirm the changes with a brief push of the rotary switch.
ÎROTEX HPSU compact operates in accordance with the
set operating mode.
ÎThe current operating mode is indicated by an appropriate
symbol in the standard display.
Operating mode Standby (Stand-by)
CAUTION!
A heating system that is not frost-protected can freeze
in cold weather and be damaged.
ƔDrain the water out of the heating system if there is
a danger of frost.
ƔIf the heating system is not drained, the power
supply must be ensured and the main switch must
remain switched on if there is a danger of frost.
In this mode, the ROTEX HPSU compact is shifted to the stand-
by mode. The frost-protection function remains in place. In order
to maintain this function, the system must not be disconnected
from the mains!
If the outdoor temperature is below the parameter value [T-Frost
Protect] the integrated heating circulation pump is switched on in
order to prevent the heating system from freezing.
All controllers integrated into the RoCon-system via the CAN bus
are also switched at a higher level to the operating mode
"Standby".
Fig. 3-6 Standard display in operating mode [Standby] 
(above the frost protection limit)
In the operating mode [Standby] the heat pump and any
optionally connected internal electric heater are iso-
lated from the power supply (energy efficiency) when
the following conditions are met:
– The outdoor temperature sensor (RoCon OT1,
15 60 70) is connected and correctly para-
metrised in the system configuration,
– The outdoor temperature is over 8°C,
– There is no heating command,
– The frost protection function is not active in any of
the connected heating circuits, and
– The ROTEX HPSU compact has been on for at
least 5 mins.
Operating mode Reducing
Reduced heating mode (lower set room temperature) in ac-
cordance with the set back temperature set in the parameter 
[T-Reduced] (see section 3.2.4).
Hot water generation according to the set temperatures and
switching cycles in the hot water time programme 
[DHW Programme 1] (see section 3.2.5).
Operating modes heating, cooling
Heating or cooling operation in accordance with the room tem-
perature set in the parameter [T-Room 1 Setpoint]
(see section 3.2.3). A connected outdoor temperature sensor
(weather-controlled flow temperature regulation) or a connected
room station will also influence the set flow temperature regu-
lation.
Hot water generation according to the set temperatures and
switching cycles in the hot water time programme [DHW Pro-
gramme 1] (see section 3.2.5).
Operating mode Summer
Hot water generation according to the set temperatures and
switching cycles in the hot water time programme [DHW Pro-
gramme 1] (see section 3.2.5).
All controllers integrated in the RoCon-system via the CAN bus
are also switched at a higher level to the operating mode
"Summer".
Operating mode Automatic 1 (Timer programme)
Automatic heating and economy mode in accordance with the
permanent timer programmes (see section 3.2.7):
– [HC Programme 1]
– [DHW Programme 1]
Operating mode Automatic 2 (Timer programme)
Automatic heating and economy mode in accordance with the
permanent timer programmes (see section 3.2.7):
– [HC Programme 2]
– [DHW Programme 2]
If, in the active operating mode, the hot water gener-
ation is in setback, you can use the rotary switch to
set temporary "DHW Reheating" without having to
change any other standard settings (see section 3.2.6).
Burner blocking contact
Likewise, the operating mode (see tab. 3-2) can be
switched from an external device (e.g. solar controller,
modem, etc.) via a potential-free contact which is con-
nected to a resistance and to the terminals "BSK" at the
J8 port on the HPSU compact.
Operating mode Resistance Tolerance
Standby <680 ȍ
± 5%
heating 1200 ȍ
Reducing 1800 ȍ
Summer 2700 ȍ
Automatic 1 4700 ȍ
Automatic 2 8200 ȍ
Tab. 3-2 Switching the operating modes using the burner blocking
contact

The resistances specified in tab. 3-2 work at a toler-
ance range of 5%. Resistances outside of this toler-
ance ranges are interpreted as open input. The heat
generator resets to the previously active operation
mode.
At resistance values higher than the value for "Auto-
matic 2", the input is not considered.
10 FA ROTEX RoCon HP - 08/2013
3xOperation
In addition to these operating modes there are various different
temporary heating programmes available (see tab. 3-3), which
run according to priority after they have been activated.
Temporary
heating / cooling
programme
Setting /
activating in
level
Rotary
switch
setting
Note
DHW Install DHW Install Section
3.2.6
Party
Time Programme

Section
3.2.7
Away
Holiday
Vacation
Screed* Configuration >
HC Configuration
Section
3.4.8
* only with expert code.
Tab. 3-3 Overview of temporary heating programmes
If a temporary heating / cooling programme (DHW In-
stall, Party, Away, Holiday, Vacation, Screed) is started
during the selected operating mode, the regulation is
preferentially executed in accordance with the settings
of this heating / cooling programme.
3.2.3 TemperaturesettingDaytimeroomtemperature
In rotary switch setting , the set room temperatures for room
heating during the day are determined.
ƔPlace the rotary switch in the "Set Temp Day" position.
ÎAn overview is displayed.
The end figures of the parameter designations (1 - 3)
within this rotary switch setting designate the associ-
ation with each individual cycle of the timer programme.
ƔSelect the temperature block to be set with the rotary switch.
ƔConfirm the changes with a brief push of the rotary switch.
ÎSettings are displayed.
ƔSet the temperature.
ƔConfirm the changes with a brief push of the rotary switch.
ÎChange has been accepted. Jump back to previous 
display.
More detailed explanations and possible setting values for this rotary switch setting
can be seen in chapter 5.5.
3.2.4 Temperature setting Economy mode
In rotary switch setting , the set room temperatures for room
heating during setback are determined.
ƔPlace the rotary switch in the "Set Temp Night" position.
ÎAn overview is displayed.
ƔSelect the parameter to be set with the rotary switch.
ƔConfirm the changes with a brief push of the rotary switch.
– [T-Reduced]: Set value for operating mode [Reducing] or
set back by a permanent timer programme.
– [T-Absence]: Set value for temporary heating / cooling
programmes ("Away" and "Vacation").
ÎSettings are displayed.
ƔSet the temperature.
ƔConfirm the changes with a brief push of the rotary switch.
ÎChange has been accepted. Jump back to previous dis-
play.
More detailed explanations and possible setting values for this rotary switch setting
can be seen in chapter 5.6.
3.2.5 Temperature setting hot water generation
In the rotary switch setting ,the hot water set temperatures for
hot water generation for each individual timer programme are de-
termined.
ƔPlace the rotary switch in the "DHW Set Temp" position.
The end figures of the parameter designations (1 - 3)
within this rotary switch setting designate the associ-
ation with each individual cycle of the timer programme.
ƔSelect the temperature block to be set with the rotary switch.
ƔConfirm the changes with a brief push of the rotary switch.
ÎSettings are displayed.
ƔSet the temperature.
ƔConfirm the changes with a brief push of the rotary switch.
ÎChange has been accepted. Jump back to previous 
display.
More detailed explanations and possible setting values for this rotary switch setting
can be seen in chapter 5.7.
3.2.6 Unplanned hot water generation
In the rotary switch position you can charge the hot water up
manually outside a hot water timer programme to the preset tem-
perature set in parameter [T-DHW Setpoint 1]. Heating up is
carried out as a priority and independently of any other heating
programmes.
ƔPlace the rotary switch in the "DHW Install" position.
ÎAn overview is displayed.
ƔSelect the parameter to be set with the rotary switch.
– [1x Hot Water]: Activating one-off hot water generation.
ƔConfirm the changes with a brief push of the rotary switch.
ƔSetting parameters
ƔConfirm the changes with a brief push of the rotary switch.
ÎStart unplanned hot water generation.
ÎIf the parameter remains active, the temperature in the hot
water storage tank is always kept above 37°C.
After this temporary function has expired, the Control
automatically jumps back to the previously active oper-
ating mode. The rotary switch should therefore be 
returned to the position "Info" after activation.
Possible setting values for this rotary switch setting can be seen in chapter 5.3.