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.

3xOperation
FA ROTEX RoCon HP - 08/2013 11
3.2.7 Switching time program
Various different timer programmes are available, that are set in
the factory, but which can be adjusted to suit, to provide conven-
ient and individual room and hot water temperature control.
The timer programmes regulate the associated heating circuit,
the storage tank charging circuit and an option connected circu-
lation pump in accordance with the stipulated switching times.
Adjustment
In the rotary switch position we set the time intervals for
the heating circuit, the integrated hot water generation and the
optional circulation pump.
ƔPlace the rotary switch in the "Time Programme"
position.
ÎAn overview is displayed.
ƔSelect the timer programme to be set with the rotary switch.
ƔConfirm the changes with a brief push of the rotary switch.
ÎSettings are displayed.
ƔSelect and change the value to be set with the rotary switch.
ƔConfirm the changes with a brief push of the rotary switch.
More detailed explanations and possible setting values forthis rotary switch setting
can be seen in chapter chapter 5 "Parameter settings".
Permanent timer programmes
For the connected heating circuits and the storage tank charging
circuit, timer programmes regulate the heating circuit tempera-
tures or the operating times for the circulation pump in ac-
cordance with the stipulated switching cycles. The switching
cycles are saved in time blocks for which various different set
temperatures apply.
In the switching cycles the heating system is regulated differen-
tiated into day and economy mode.
The temperature settings for this timer programme are carried out
via the set value settings "Set Temp Day" ,"Set Temp
Night" and "DHW Set Temp" .
The following switching time programmes are available:
– 2 timer programmes for the heating circuit, each with 
3 possible time cycles
– [HC Programme 1]
– [HC Programme 2]
A separate input for each individual day of the week is
possible, or in blocks of "Monday to Friday", "Saturday
to Sunday" and "Monday to Sunday".
Programme Time period switching cycle
HC Programme 1 Single day of the week (Monday, Tuesday...)
1.
2.
3.
06:00 -> 22:00
--:-- -> --:--
--:-- -> --:--
Working week
(Monday to Friday)
1.
2.
3.
06:00 -> 22:00
--:-- -> --:--
--:-- -> --:--
Weekend
(Saturday to Sunday)
1.
2.
3.
07:00 -> 23:00
--:-- -> --:--
--:-- -> --:--
Entire week
(Monday to Sunday)
1.
2.
3.
06:00 -> 22:00
--:-- -> --:--
--:-- -> --:--
HC Programme 2 See HC Programme 1
1.
2.
3.
See
HC Programme 1
Tab. 3-4 Menu structure heating circuit timer programme
Time settings for one switching cycle in one weekday or
block programme are also adopted for other time pe-
riods, provided that they affect the same weekdays. Ex-
amples referring to tab. 3-4:
a) For the single working day "Monday" the start time
in the 1st. Switching cycle changed from 06:00 to
05:00.
ÎIn the time period "Working week" and "Entire
week", the 1st. time block Switching cycle also
changed from 06:00 to 05:00.
b) For the time period "Weekend", the start time in the
1st. Switching cycle changed from 07:00 to 08:00.
ÎIn the individual weekdays "Saturday" and "Sun-
day", the 1st. time block is automatically Switch-
ing cycle also changed from 07:00 to 08:00.
c) For the time period "Entire week", the end time in
the 1st. time block Switching cycle changed from
22:00 to 21:30.
ÎIn all the weekdays the 1st. switching cycle is
also changed from 22:00 to 21:30.
– 2 timer programmes for the hot water circuit, each with 3 pos-
sible switching cycles
– [DHW Programme 1]
– [DHW Programme 2]
The setting and input structure of the timer programmes
are identical to the ones for the heating circuit timer pro-
gramme (see also tab. 3-4).
– 1 timer programme for one optionally connected circula-
tion pump with 3 individual possible switching cycles
[Circulation Time]
The setting and input structure of the timer pro-
grammes are identical to the ones for the heating
circuit timer programme (see also tab. 3-4).
For further instructions concerning settings for an 
optional circulation pump, see section 3.4.10.
Saved switching time programmes can be changed at any time.
To provide a better overview, we recommend making a record of
the programmed switching times and keeping it in a safe place
(see chapter 9.1.1).
The permanent timer programmes are preset as per tab. 3-5.

Switching cycle 1 Switching cycle 2 Switching cycle 3
Time period On Off On Off On Off
Room heating / room cooling
Temperature setting [T-Room 1 Setpoint]: 20°C [T-Room 2 Setpoint]: 20°C [T-Room 3 Setpoint]: 20°C
[T-Reduced]: 10°C
"HC Programme 1"
Monday - Friday 06:00 22:00 - - : - - - - : - - - - : - - - - : - -
Saturday, Sunday 07:00 23:00 - - : - - - - : - - - - : - - - - : - -
"HC Programme 2"
Monday - Friday 06:00 08 :00 - - : - - - - : - - - - : - - - - : - -
Saturday, Sunday 07:00 23:00 - - : - - - - : - - - - : - - - - : - -
Domestic hot water generation
Temperature setting [T-DHW Setpoint 1]: 48°C [T-DHW Setpoint 2]: 48°C [T-DHW Setpoint 3]: 48°C
"DHW Programme 1"
Monday - Sunday 00:00 24:00 - - : - - - - : - - - - : - - - - : - -
"DHW Programme 2"
Monday - Friday 05:00 21:00 - - : - - - - : - - - - : - - - - : - -
Saturday, Sunday 06:00 22:00 - - : - - - - : - - - - : - - - - : - -
"Circulation Time"
Monday - Friday 05:00 21:00 - - : - - - - : - - - - : - - - - : - -
Saturday, Sunday 06:00 22:00 - - : - - - - : - - - - : - - - - : - -
12 FA ROTEX RoCon HP - 08/2013
3xOperation
Tab. 3-5 Factory setting for the permanent switching time programmes
Temporary timer programmes
For a specific situation there are 4 temporary programmes
available, whichdeactivatethe permanent timer programmes
or the current operating mode for the duration of their validity.
The symbol of the temporary time program is displayed in the
header line of the standard display, as long as the time program
is active.
The following temporary time programmes may be
interrupted anytime by the manually change of the
operating mode.
1. [Party]: Immediate one-off extension of the room
heating
a) If an automatic programme is activated, the last
applicable switching cycle is always extended. In the time
before the switching cycle 1 it is controlled according to
the target value in PARAMETER [T-Room 1 Setpoint].
b) In all the other operating modes, the set room temperature
of the first switching cycle applies.
– The hot water generation is not affected.
– The time programme runs for the set time period after 
activation.
2. [Away]: Immediate one-off setback up to 6 hours
– The system operates in the economy mode according to
the room temperature set in the rotary switch setting "Set
Temp Night" ,in the parameter [T-Absence].
– The hot water generation is not affected.
– The time programme runs for the set time period after 
activation.
3. [Holiday]: One-off calendar-controlled presence.
– The system operates exclusively in accordance with the
"Sunday" settings in the [HC Programme 1].
– The hot water generation operates exclusively in accord-
ance with the "Sunday" settings in the 
[DHW Programme 1].
4. [Vacation]: One-off calendar-controlled setback.
– The system operates in the economy mode exclusively
according to the room temperature set in the rotary switch
setting "Set Temp Night" ,in the parameter 
[T-Absence].
– 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).
– The calendar-controlled programme [Vacation] is not
started if the operating mode [Standby] or [Manual Oper-
ation] is active on the set start date.
3.2.8 System settings
In the rotary switch setting "Configuration" we undertake
the basic settings for the Control RoCon HP and the system con-
figurations for the installation environment of the ROTEX HPSU
compacts, the direct heating circuit, the hot water generation and
any optionally connected components.
Depending on access authority (user or expert), various different
parameters are available. Certain parameters are only acces-
sible to the heating expert.

3xOperation
FA ROTEX RoCon HP - 08/2013 13
Language, Date, Time, Setting summer /winter time
An internal pre-programmed calendar ensures 
automatic time reset at the annually recurring
summer/winter time changes. If required, the automatic
time changeover can be switched off.
ƔPlace the rotary switch in the "Configuration" position.
ÎAn overview is displayed.
ƔSelect the "Setup" level with the rotary switch.
ÎAn overview is displayed.
ƔUse the rotary switch to select and confirm the parameters
[Language], [Date], [Time] or [Summertime].
ƔSelect and change the value to be changed within the
individual display using the rotary switch.
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 forthis rotary switch setting
can be seen in section 3.4 and in chapter 5.2.
Changing the display settings
ƔPlace the rotary switch in the "Configuration" position.
ÎAn overview is displayed.
ƔSelect the "Setup" level with the rotary switch.
ÎAn overview is displayed.
ƔUse the rotary switch to select the parameters [LCD
Contrast], [LCD Brightness], [LCD Illum Time] or [RGB
Setup].
ƔConfirm the changes with a brief push of the rotary switch.
ƔSelect and change the value to be changed within the
individual display using the rotary switch.
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 forthis rotary switch setting
can be seen in chapter 5.2.1.
3.2.9 Terminal function
In the rotary switch setting "Remote Param" , if terminal
mode is activated, other controllers in the RoCon system can also
be parameterised via the controller integrated in the CAN bus.
After activation of the "Bus Scan" a list of the equipment that was
recognised is shown for selection in the display (external
equipment and local equipment).
After selection and acknowledgement of an external item of
equipment, this is shown on the local Control. The local control
element acts as the remote control for the external equipment. In
this case all the control functions are provided and saved 1:1 as
on the external equipment.
During this terminal function the header of the display carries 
additional information on the remotely controlled equipment; the
symbol #X indicates the bus ID setting for the remotely con-
trolled equipment.
The displayed values and symbols are always loaded from the
selected equipment (such as the mixer circuit infeed temperature
of the mixer module RoCon M1).
Fig. 3-7 Display example for a remotely controlled mixer module
For operation of the local equipment, this must be activated again
in the selection list (parameter [no selection]).
If at the rotary switch setting the message "n. A."
is displayed, the control unit has yet to be assigned a
valid terminal address.
If the message "n. A." is still displayed it may be nec-
essary to update the device software before the ter-
minal function can be used. Contact the ROTEX
Service Team for this.
Assign the terminal address of the HPSU compact to
the control element RoCon B1
If several items of equipment in the RoCon system are
connected via the data bus, make sure not to duplicate
the setting of any parameters [Terminal address].
ƔEnter the expert code (see section 3.4.1).
ÎThe "Setup" level is displayed after entering.
ƔSelect the parameter [Terminal address] with the rotary
switch.
ƔConfirm the changes with a brief push of the rotary switch.
ƔWithin the display, use the rotary switch to set the unique
terminal address.
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 5.2.1.
Activating / deactivating normal operation
Requirement: A valid terminal address is assigned to the control
element RoCon B1 of the HPSU compact or the room station
RoCon U1.
For setting the terminal address of optional connected
equipment, see chapter 4.2 or the instruction handbook
supplied for the respective equipment.

ƔPlace the rotary switch in
the "Remote Param"
position.
ÎThe level "Remote
Param" is displayed.
ƔSelect the parameter [Bus
Scan] with the rotary
switch.
ƔConfirm the changes with
a brief push of the rotary
switch.
ÎThe context menu is
displayed.
Remote Param
Bus Scan
no selection
Fig. 3-8 Display of the level 
"Remote Param" at com-
missioning or temporary
disconnection from the
mains
14 FA ROTEX RoCon HP - 08/2013
3xOperation
ƔUse the rotary switch to select the parameter [New scan?]
and confirm with "Yes".
ÎBus Scan is performed.
ÎAn over of all the equipment found is displayed.
ƔUse the rotary switch to select the equipment for which the
terminal function is to be performed.
ƔConfirm the changes with a brief push of the rotary switch.
ÎThe local control element acts as the remote control for
the external equipment.
To end terminal mode and restore operation of the assigned
equipment to the control element, at the level "Remote Param"
the parameter [no selection] must be selected and acknowl-
edged (see fig. 3-8).
3.2.10 Quiet Mode
Quiet Mode means that the exterior heat pump unit is operating
at reduced output. This reduces the operating noise caused by
the exterior heat pump unit.
CAUTION!
Active Quiet Mode reduces the performance in room
heating and room cooling operation with the result that
it may no longer be possible to reach the preset target
temperatures.
ƔWith outside temperatures below freezing, there is
a risk of material damage caused by frost.
The Quiet Mode is set and turned off as follows:
ƔPlace the rotary switch in the "Configuration" position.
ÎAn overview is displayed.
ƔSelect the "System Configuration" level with the rotary switch.
ÎAn overview is displayed.
ƔSelect the parameter [Quiet Mode] with the rotary switch.
ƔSelect and change the value to be changed within the
individual display using the rotary switch.
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 function can be seen
in chapter 5.2.2.
3.2.11 SMART GRID
You will need a special electric meter with an SG receiver for this
function, and the HPSU compact must be connected to it.
As soon as the function is activated by the parameter [SMART
GRID] = 1, the heat pump is moved to the standby, normal or hot
water operating mode, depending on the signal provided by the
energy supply company.
The SG signals and operating status conditions are differentiated
as follows:
Signal Cost of
electricity Effect on
EVU SG Hot water Heating
1 0 none No operating mode No operating mode
0 0 normal Normal operating
mode
Normal operating
mode
0 1 low The switch-on rec-
ommendation and
set value storage
tank temperature is
increased, depend-
ing on the parameter
"Mode SG"
The switch-on recom-
mendation and set
value flow tempera-
ture is increased, de-
pending on the
parameter "Mode
SG"
1 1 very
low
Switch-on command
and set value of stor-
age tank tempera-
ture is set to 80°C
Switch-on command
for storage tank
charging
Tab. 3-6 Utilisation of the SG signal
More detailed explanations and possible setting values for this function can be seen
in chapter 5.2.1.
For using this function, the corresponding installation at the HPSU compact must
have been done earlier.
3.3 Special functions
In the "Special Level" we can carry out various functions that are
usually used by the heating expert.
The following special functions are possible:
– Manual mode (see section 3.3.1).
– Fault display (see chapter 6)
– Resetting to factory settings (see section 3.4.7)
More detailed explanations of these functions can be found in chapter 5.11.
The call-up of special functions does not depend on the
setting on the rotary switch.
ƔDepress the exit button for at least 5 secs.
ÎMenu "Special Level" is displayed.
ƔSelect the programme to be started with the rotary switch.
ƔConfirm the changes with a brief push of the rotary switch.
ÎThe selected programme starts.
ƔCancellation and jump back by:
– pushing the exit button again, or
– briefly actuating the rotary switch or
– selecting a different menu using the rotary switch.

3xOperation
FA ROTEX RoCon HP - 08/2013 15
3.3.1 Manual Operation
The manual mode serves to regulate the ROTEX HPSU compact
manually to a specific flow temperature. The manual mode
should only be used for diagnostic purposes.
With hydraulically controlled priority operation for the hot water
generation you must make sure that the flow temperature set in
manual mode is adequate to achieve the stored hot water set
temperature (parameter [T-DHW Setpoint 1]).
During active manual mode the hot water is consistently regu-
lated to the first set value parameter of hot water generation 
([T-DHW Setpoint 1]).
When the manual mode is ended, the Control RoCon HP auto-
matically switches to the operating mode "Standby".
Manual Operation
Current operating mode
Special Level
Manual Operation
Error
Set Actual
Fig. 3-9 Symbolic brief instructions for manual mode
3.4 Special system settings
The Control RoCon HP already has the basic configuration for
the ROTEX HPSU compact. However, it needs to be adapted to
the optionally connected accessories and the installation envi-
ronment during initial commissioning.
Adaption is carried out via the setting of parameters in the rotary
switch setting "Configuration" .
Navigating with the rotary switch accesses either the next deeper
level or directly to the appropriate parameter.
3.4.1 Access rights (expert code)
Certain settings are restricted by Control access rights. In order
to gain access to these setting values (parameters) you need to
enter the expert "Setup" code in the level.
The fig. 3-10 shows the fundamental procedure for entering the
access code. The expert code will be advised to the expert
company in a separate letter.
Configuration
Setup
System Configuration
Access Rights
User
Access Rights
Expert
Setup
LCD Contrast
LCD Brightness
Setup
Keylock Function
Access Rights
Code Reset Time
Access Rights Access Rights
Access Rights
Fig. 3-10 Entering the access code

16 FA ROTEX RoCon HP - 08/2013
3xOperation
3.4.2 Heat curve
Caution - danger of overheating with
underfloor heating!
In the event of a fault, or in hand mode, damage may
be caused to the screed, the structure of the floor and
the underfloor heating system by overheating.
ƔMax T-Flow before initial commissioning, set the
maximum permissible system temperature in the
maximum temperature limit in the Control
RoCon HP (parameter [T VBH1 MAX]).
With the heating characteristic curve, the heating output is ad-
justed to building conditions in accordance with the relevant
outdoor temperature (weather-controlled flow temperature regu-
lation, see section 3.4.4). Generally speaking, the steepness of
the heating characteristics describes the ratio of the flow temper-
ature change to the outdoor temperature change.
The heating characteristic curve applies within the minimum and
maximum temperature limits that have been set for the corre-
sponding heating circuit. The room temperature measured in the
living area may differ from the desired room temperature; these
deviations can be kept to a minimum by installing a room ther-
mostat or a room temperature controller.
The Control is set in the factory so that the heating curve does
not adjust itself during operation.
The automatic heat curve adaption can be activated 
(parameter [HC Adaption]), if the room temperature controller
(RoCon U1, 15 70 34) connected (see section 3.4.4).
Starting conditions for the automatic heating curve adaption:
– Outdoor temperature <8°C
– Operating mode is automatic (I or II)
– Duration of setback phase at least 6 hours
If an automatic heat curve adaption is not activated, the heat
curve can be set manually by adjusting the parameter [Heat-
Slope]).
Manually adapting the heating curve
Do not make any corrections to the set values for 1 - 2
days, and then only make them in small increments.
ƔDeactivate additional heat sources (e.g. fireplaces,
direct solar radiation, open windows).
ƔFully open any existing radiator thermostat valves
or setting drives.
ƔActivate the operating mode "heating".
Approximate setting values:
– Radiator and system 70: 1.4 to 1.6.
– Underfloor heating system: 0.5 to 0.9.
0.80
Configuration
Setup
System Configuration
Configuration
System Configuration
HC Configuration
DHW Configuration
HC Configuration
Operating Mode
HC Function
HC Configuration
Heat-Slope
Heat Up Opt
Heat-Slope
Heat-Slope
Heat-Slope
Fig. 3-11 Manual setting the heat curve
TAExternal temperature
TRRoom temperature set value TVFlow temperature
Fig. 3-12 Heat curves
More detailed explanations and possible setting values for this function can be seen
in chapter 5.2.

3xOperation
FA ROTEX RoCon HP - 08/2013 17
3.4.3 Cooling characteristic curve
Caution - risk of condensation in the screed!
In the event of a fault or wrong setting of parameters,
damage may be caused to the screed, the structure of
the floor and the underfloor heating system by conden-
sation.
ƔBefore initial commissioning, set the maximum
permissible system temperature in the minimum
temperature limit in the Control RoCon HP
(parameter [Min T-Flow Cooling]).
With the cooling characteristic curve, the flow temperature is 
adjusted to building conditions in accordance with the relevant
outdoor temperature (see section 3.4.2). Warmer outdoor tem-
peratures result in a cold flow temperature and vice versa.
The cooling characteristic curve is adjusted using the following
four parameters:
– [Start T-Out Cooling]
– [Max T-Out Cooling]
– [T-Flow cooling start]
– [T-Flow cooling max]
During the weather-controlled flow temperature regulation, the
user can adjust the flow temperature using the parameter
[Cooling Setpoint Adj] by a maximum of 5°C up or down. The
lower temperature limit is limited by the parameter [Min T-Flow
Cooling].
TV
T1
4
3
2
A
1 Parameter [Start T-Out Cooling]
2 Parameter [Max T-Out Cooling]
3 Parameter [T-Flow cooling start]
4 Parameter [T-Flow cooling max]
TAExternal temperature
TVFlow temperature
Fig. 3-13 Parameter-dependency of characteristic cooling curve
More detailed explanations and possible setting values for this function can be seen
in chapter 5.2.
3.4.4 Weather-controlled flow temperature regulation
If the "Weather-controlled Flow Temperature Regulation" is
active, the flow temperature is determined automatically in ac-
cordance with the set heating curve depending on the outside
temperature:
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, in addition, the room temperature controller (RoCon U1,
15 70 34) is connected to the ROTEX HPSU compact, the
set temperatures are regulated in a weather and room temper-
ature mode (see tab. 5-3/tab. 5-16, Parameter [Room In-
fluence]).
Activation and deactivation of this function takes place via the
parameter [HC Function] in the rotary switch position "Configu-
ration" in level "HC Configuration".
– Parameter [HC Function] = 0: Weather-controlled flow tem-
perature regulation
– Parameter [HC Function] = 1: Regulation to fixed set temper-
ature value
If a mixer module is connected
The setting of the heating curve and the activation of the weather-
based infeed temperature regulation for the assigned heating
circuit is performed in the same way as described above.
The is the option of operating the assigned heating circuit as a
a) Mixer extension 
The outside temperature determined by the outside
temperature sensor connected to the ROTEX HPSU compact
is transmitted to the mixer module via the CAN bus.
or as
b) Mixer extension with zone regulation 
A separate outside temperature sensor (HPSU
compact OT1, 15 60 70) must be connected to the mixer
module. The assigned heating circuit is regulated by the rele-
vant outside temperature for this zone.
When the terminal function is activated, the mixer module is op-
erated via the RoCon B1 control element of the ROTEX HPSU
compact, and the settings for the assigned heating circuit are per-
formed.
In connection with the room temperature controller RoCon U1
(15 70 34), the mixer module can also autonomously control
the assigned heating circuit, fully independently of the ROTEX
HPSU compact.
If at the rotary switch setting the message "n. A."
is displayed, the control unit has yet to be assigned a
valid terminal address.
If the message "n. A." is still displayed it may be nec-
essary to update the device software before the ter-
minal function can be used. Contact the ROTEX
Service Team for this.
More detailed explanations and possible setting values for this rotary switch setting
can be seen in chapter 5.2.3 and 5.13.2.

18 FA ROTEX RoCon HP - 08/2013
3xOperation
3.4.5 Interlink function
This setting offers the option for the ROTEX HPSU compact to 
include two different preset room temperature values in the
control unit.
The deviations of the preset room temperature for the 2nd device
(e.g. HP convector) from the preset room temperature of the
ROTEX HPSU compact are determined by the parameter 
[T-Flow CH adj] in the heating mode or [T-Flow Cooling adj]
cooling mode.
During heating operation, the second set value is increased,
whereas it is decreased during the cooling operation.
This applies both to a weather-controlled controller and a con-
troller using a fixed flow temperature.
More detailed explanations and possible setting values for this function can be seen
in chapter 5.2.1.
3.4.6 Legionella protection
The ROTEX HPSU compact itself does not need this function 
because of the small volume of the internal drinking water heat
exchanger.
This function serves to prevent bacterial contamination in the hot
water storage tank. For accurate controllers for drinking water 
hygiene, refer to the national provisions.
This involves heating the connected storage tank to a disinfection
temperature 1 x a day or 1 x a week. The legionella protection
function is active for an hour.
Setting the parameters for legionella protection is carried out in
the rotary switch setting "Configuration" in level "DHW
Configuration".
Using the factory settings, the storage tank is charged at 00:15
hours if the hot water temperature is below 65°C at that time.
WARNING!
There is a danger of scalding at hot water tempera-
tures over 60°C. This is possible, when solar energy is
used, when the Legionella protection is activated or
when the domestic hot water target temperature is set
higher than 60°C.
ƔFit a scald-protection in the hot water distributor
line (e.g. VTA32, 15 60 16).
The maximum hot water temperature set by the user or
the heating technician is ignored when hot water is
heated for disinfection purposes.
A connected circulation pump is automatically switched
off during thermal disinfection.
More detailed explanations and possible setting values for this function can be seen
in chapter 5.2.4.
3.4.7 Reset to factory settings (Reset)
If the ROTEX HPSU compact no longer works properly and any
other cause for the malfunction cannot be detected, it may be
helpful to reset all the controller settings to the factory settings.
There are 3 options for this.
Option 1
User status allows the switching time program in the "Special
Level" to be reset to the factory setting, according to tab. 3-5.
1. Depress the exit button for at least 5 secs.
ÎMenu "Special Level" is displayed.
2. Select the programme "Timeprog Reset" with the rotary
switch.
3. Execute the programme by briefly pressing on the rotary
switch.
ÎThe respective values are reset to the factory setting.
4. Select "return" with the rotary switch.
5. Confirm the changes with a brief push of the rotary switch.
Possibility 2
Technician status permits all customer-specific parameter
settings in the "Special Level" to be reset to the factory setting
according to tab. 5-1 to tab. 5-11.
1. Enter the expert code (see section 3.4.1).
ÎThe "Setup" level is displayed after entering.
2. Depress the exit button for at least 5 secs.
ÎMenu "Special Level" is displayed.
3. Select the programme "Reset?" with the rotary switch.
4. Execute the programme by briefly pressing on the rotary
switch.
ÎThe respective values are reset to the factory setting.
5. Select "return" with the rotary switch.
6. Confirm the changes with a brief push of the rotary switch.
Possibility 3
If fundamental changes to the ROTEX HPSU compact
equipment for the function within the RoCon system are nec-
essary, the Basic Configuration can be reset using Technician
status mode to the factory settings or can be redefined.
1. Enter the expert code (see section 3.4.1).
ÎThe "Setup" level is displayed after entering.
2. Select the "System Config" level with the rotary switch.
3. Confirm the changes with a brief push of the rotary switch.
ÎAn overview is displayed.
4. Select the programme "Delete" with the rotary switch.
5. Confirm the changes with a brief push of the rotary switch.
ÎRestart of the ROTEX HPSU compact is performed.
ÎThe message "No Basic Configuration" is displayed.
6. Place the rotary switch in the "Info" position.
ÎThe message "Basic Configuration Not Set" is displayed.
7. There is now the facility either to select manual mode for the
equipment individually (a) or to load the factory settings
automatically (b).
a) Press the rotary switch briefly.
ÎA parameter overview is displayed at the level "Basic
Configuration" and the settings can performed manually
as desired tab. 5-14.

3xOperation
FA ROTEX RoCon HP - 08/2013 19
b) Turn the ROTEX HPSU compact off and restart it.
ÎAfter the ROTEX HPSU compact has restarted the ques-
tion will be posed whether the standard configuration
should be used. If it is confirmed with "Yes", the preset
basic configuration is loaded. If the answer given is
"No" the settings must be performed manually, see a).
More detailed explanations and possible setting values for this function can be seen
in chapter 5.12.
After a reset to the factory settings via option 2 or 3, the system
must be configured again by the heating technician to the instal-
lation environment and all the customer-specific parameters
reset.
3.4.8 Screed Program
The Screed Program is intended exclusively for specified drying
of newly created screed in underfloor heating systems. This op-
erates the ROTEX HPSU compact for several days according to
apredefined temperature profile (the predefined temperature
profile is based on the recommendations of the Bundesver-
bandes Flächenheizungen für das Belegreifheizen (Federal As-
sociation of Surface Heating Systems for heating to cure the
floor).
The temperatures and the duration of the Screed Program can be
adjusted as required, after entering the expert code, in the rotary
switch setting "Configuration" in the level "HC Configu-
ration" in the parameter [Screed Program].
The Screed Program is a special function and is not interrupted
by any other operating mode. It can be activated only by the
heating expert for the direct heating circuit and/or the op-
tionally connected mixed heating circuits. Each heating circuit
must be separately activated.
Prior to start of the Screed Program, the parameters
[Interlinc fct] and [Room thermostat] must have been
deactivated.
In the event of a brief power failure the system contin-
ues with a previously activated screed function in place
of shutting down.
After activation of the Screed Programs all the weather-controlled
regulating functions of the relevant heating circuit are switched
off. The relevant heating circuit operates independently of the op-
erating mode (switching times) as a constant temperature regu-
lator.
An already started Screed Program can be deactivated at any
time. At the end of Screed Programs the screed function the pa-
rameter is automatically set to "Off" and the heating circuit once
again operates according to the currently set operating mode.
Function heating
Function heating verifies that the installation is fault-free for the
heating engineer. A pre-prepared heating up protocol for ROTEX
underfloor heating can be found in the ROTEX Internet portal.
In this case, function heating (identical with "Heating up" in
EN 1264, section 5.2) does not constitute a heating up process
for drying and curing. Normally you need to carry out separate
heating process to cure the floor and/or performmechanical
drying.
Heating up should be carried out no earlier than after 21 days for
cement screed, and no earlier than after 7 days for anhydrite
screed in accordance with the details provided by the manufac-
turer. The first heating up starts at a feed temperature of 25°C,
which must be maintained for a period of 3 days. Then heating is
carried out at the maximum flow temperature set for the heating
circuit (limited to max. 55°C) and this is then held for a further
4 days.
As a result of the insulating effect of the DUO heating pipe on
System 70, the screed function is carried out at higher tempera-
tures. The temperature profile must be adapted to this application
in the parameter [Screed Program]. On System 70, the heating
up starts at a temperature of 38°C, which is held for a period of
3 days. After that, the set maximum heating circuit temperature
(limited to 70°C) is held for 4 days.
After the heating up process described, there is no guarantee that
the screedhas achieved the moisture content required to cure the
floor.
You must determine the moisture content in the screed by meas-
urement before laying the floor covering.
Procedure in accordance with EN 1264 Part 4:
The heating circuits must be checked for leaks by a
water pressure test once the anhydrite and cement
screeds are completed. The absence of leaks must be
ensured immediately before and during screed laying.
The level of the test pressure is at least 1.3 times the
maximum permissible operating pressure.
If there is a danger of freezing up, you must take suita-
ble measures, e.g. the use of antifreeze or temperature
control in the building. If antifreeze is no longer required
for intended use of the installation, you must remove
the antifreeze by draining it out and flushing the instal-
lation with at least 3 changes of water.
t1Starting temperature 25°C (38°C on System 70)
t2Maximum heating circuit temperature
tVFlow temperature
Z Duration of screed function, in days, after function start
Fig. 3-14 Sequence of timings of the Screed Program for function heat-
ing
Ready-to-apply heating
The drying out procedure for the screed cannot be predicted ex-
actly in advance. At higher humidity levels in the air this can come
to a complete stop under certain circumstances stop under
certain circumstances. The drying out process may be acceler-
atedby running the underfloor heating (curingheating) or by using
measures such as mechanical drying.
Every curing heating process must be commissioned, separately
by the building owner as an extra service in accordance with
VOB. For the flooring contractor to achieve fault-free installation,
the flooring must be properly curedbefore work is started on the
top flooring layer.

20 FA ROTEX RoCon HP - 08/2013
3xOperation
The standard settings can be used to activate the combined
function and curing heating programme in order to achieve a re-
sidual moisture level in the screed required for curing the floor
(see fig. 3-15). The residual moisture level in the screed must,
however, always be checked by measurement before the floor-
covering is laid.
Fig. 3-15 The time sequence of the Screed Program in combined func-
tion and curing heating (for legend see fig. 3-14)
More detailed explanations and possible setting values for this function can be seen
in chapter 5.2.3.
Screed Program setting and starting
The Screed Program contains factory-set specifications which
can, however, be individually adapted.
Screed Program The day on which the screed function is
activated does not count towards the runtime of the screed
programme. The 1st. The day begins with the change of the day
at 00:00. On the day of activation we heat the remaining time at
the programme of the first day.
ƔPlace the rotary switch in the "Configuration" position.
ÎAn overview is displayed.
ƔSelect the "Setup" level with the rotary switch.
ÎAn overview is displayed.
ƔUsing the rotary push button, select and check the param-
eters [Interlinc fct] and [Room thermostat] whether they are
deactivated (siehe tab. 5-1).
ÎBoth parameters must be on "Off" before starting the
screed function.
ƔSet the screed function in the system parameters to "On" 
(see also fig. 3-16).
ƔCheck the Screed Program and adjust to the stipulations
provided for the screed by the manufacturer, if necessary.
– The setting range is always between 0.0 and 65°C.
– The steps are 1°C.
Day Factory setting Day Factory setting
1 - 3 25°C 10 - 19 55°C
4 - 7 55°C 20 40°C
825°C2125°C
9 40°C 22 - 26 -
Tab. 3-7 Presettings Screed Program
After expiry of the Screed Program, the Control RoCon HP again
operates in the previously set operating mode. Unless configured
previously, the following tasks need to be carried out in con-
clusion.
a) When connecting without room temperature controller:
ƔSet the heating characteristic curve or the desired flow
temperature.
b) When connecting with the room temperature controller:
ƔActivate the room temperature controller.
ƔSet the heating characteristic curve or the desired flow
temperature. If required, activate the parameter [Room
Influence] and set the preset room temperature.
Configuration
Setup
System Configuration
T-HS
Off Day 2 25°C
Configuration
System Configuration
HC Configuration
DHW Configuration
HC Configuration
Operating Mode
HC Function
HC Configuration
Screed
Screed Program
Screed
T-HS
On
Screed
Screed
Screed Program
Day 2
Day 2 25°C
Day 2
Day 2 26°C
Fig. 3-16 Screed Program setting