Rotex RoCon U1 User manual

ROTEX Control unit
RoCon HP, 
RoCon U1,
RoCon M1
Operating manual
Electronic controller for heat pumps
For the types
HPSU compact 304
HPSU compact 308
HPSU compact 508
HPSU compact 516
GB
Output 06/2015
For certified companies

List of contents
2FA ROTEX RoCon HP - 06/2015
1 Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
1.1 Observing instructions . . . . . . . . . . . . . . . . . . . . 4
1.2 Warning signs and explanation of symbols . . . . 4
1.3 Avoid danger . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.4 Proper use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2 Product description. . . . . . . . . . . . . . . . . . . 6
3 Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
3.1 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
3.2.1 Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
3.2.2 Operating elements. . . . . . . . . . . . . . . . . . . . . . . . .8
3.3 Operating concept . . . . . . . . . . . . . . . . . . . . . . . 9
3.4 Basic functions and operating modes . . . . . . . 10
3.4.1 System information (Info) . . . . . . . . . . . . . . . . . . .10
3.4.2 Setting the operating mode . . . . . . . . . . . . . . . . . .12
3.4.3 Temperature setting Daytime room temperature .14
3.4.4 Temperature setting Economy mode . . . . . . . . . .14
3.4.5 Temperature setting hot water generation . . . . . .14
3.4.6 Unscheduled hot water generation . . . . . . . . . . . .14
3.4.7 Switching time program. . . . . . . . . . . . . . . . . . . . .15
3.4.8 System settings. . . . . . . . . . . . . . . . . . . . . . . . . . .17
3.4.9 Terminal function. . . . . . . . . . . . . . . . . . . . . . . . . .17
3.4.10 Quite Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18
3.4.11 SMART GRID (SG) . . . . . . . . . . . . . . . . . . . . . . . .18
3.5 Special functions . . . . . . . . . . . . . . . . . . . . . . . 19
3.5.1 Manual Operation . . . . . . . . . . . . . . . . . . . . . . . . .19
3.5.2 Reference run 3-way diverter valve . . . . . . . . . . .20
3.6 Special system settings . . . . . . . . . . . . . . . . . . 20
3.6.1 Access Rights (Technician password) . . . . . . . . .20
3.6.2 Heat curve. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21
3.6.3 Cooling characteristic curve . . . . . . . . . . . . . . . . .22
3.6.4 Weather-controlled flow temperature regulation . .22
3.6.5 Frost protection function . . . . . . . . . . . . . . . . . . . .23
3.6.6 Interlink function . . . . . . . . . . . . . . . . . . . . . . . . . .23
3.6.7 Additional alternative heat generator . . . . . . . . . .24
3.6.8 Heating support. . . . . . . . . . . . . . . . . . . . . . . . . . .24
3.6.9 Special function: Switching contacts . . . . . . . . . . .24
3.6.10 Air Purge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25
3.6.11 Legionella protection . . . . . . . . . . . . . . . . . . . . . . .25
3.6.12 Reset to factory settings (Reset). . . . . . . . . . . . . .26
3.6.13 Screed Program . . . . . . . . . . . . . . . . . . . . . . . . . .26
3.6.14 Relay Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .29
3.6.15 Settings for optional circulation pump . . . . . . . . . .29
3.6.16 Remote control via Internet . . . . . . . . . . . . . . . . . .29
4 Initial start-up. . . . . . . . . . . . . . . . . . . . . . . 30
4.1 Fundamental aspects of the IDs and 
authorisations in the RoCon system . . . . . . . . 30
4.2 Operator guiding during the first 
commissioning and for system extensions. . . . 31
4.3 Starting up the ROTEX HPSU compact. . . . . . 32
4.3.1 Allocating the terminal ID on the control unit
RoCon B1 of the ROTEX HPSU compact. . . . . . .32
4.4 Commissioning optional RoCon system 
components . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
4.4.1 Mixer module RoCon M1 . . . . . . . . . . . . . . . . . . .32
4.4.2 Room station RoCon U1 . . . . . . . . . . . . . . . . . . .33
4.4.3 Allocating mixing module RoCon M1 to 
a heat generator . . . . . . . . . . . . . . . . . . . . . . . . . .34
4.4.4 Master-RoCon function . . . . . . . . . . . . . . . . . . . . .34
4.4.5 Caretaker function. . . . . . . . . . . . . . . . . . . . . . . . .34
5 Parameter Overview . . . . . . . . . . . . . . . . . .35
5.1 For first commissioning or resetting to
factory settings . . . . . . . . . . . . . . . . . . . . . . . . 35
5.2 After first commissioning / after successful 
basic configuration . . . . . . . . . . . . . . . . . . . . . 36
5.2.1 Rotary switch setting: Configuration . . . . . . . . . . 36
5.2.2 Rotary switch setting: DHW Install . . . . . . . . . . . 37
5.2.3 Rotary switch setting: Operating Mode . . . . . . . 37
5.2.4 Rotary switch setting: Set Temp Day . . . . . . . . . 37
5.2.5 Rotary switch setting: Set Temp Night . . . . . . . . 37
5.2.6 Rotary switch setting: DHW Set Temp . . . . . . . . 37
5.2.7 Rotary switch setting: Time Program . . . . . . . . . 37
5.2.8 Rotary switch setting: Remote Param . . . . . . . . 37
5.2.9 Rotary switch setting: Info . . . . . . . . . . . . . . . . . 37
5.2.10 Exit button: Sonderfunktion . . . . . . . . . . . . . . . . . 37
5.3 Parameter levels for the RoCon M1 mixer
module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
5.3.1 Rotary switch setting: Info . . . . . . . . . . . . . . . . . 37
5.3.2 Rotary switch setting: Operating Mode . . . . . . . 37
5.3.3 Rotary switch setting: Set Temp Day . . . . . . . . . 37
5.3.4 Rotary switch setting: Set Temp Night . . . . . . . . 37
5.3.5 Rotary switch setting: DHW Set Temp . . . . . . . . 37
5.3.6 Rotary switch setting: DHW Install . . . . . . . . . . . 37
5.3.7 Rotary switch setting: Time Program . . . . . . . . . 38
5.3.8 Rotary switch setting: Remote Param . . . . . . . . 38
5.3.9 Rotary switch setting: Configuration . . . . . . . . . . 38
6 Parameter settings . . . . . . . . . . . . . . . . . . .39
6.1 Explanation of the parameter tables . . . . . . . . 39
6.2 Rotary switch setting: Configuration . . . . . . . . 39
6.2.1 Level "Setup". . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
6.2.2 Level "System Configuration" . . . . . . . . . . . . . . . 42
6.2.3 Level "HC Configuration". . . . . . . . . . . . . . . . . . . 43
6.2.4 Level "DHW Configuration" . . . . . . . . . . . . . . . . . 45
6.3 Rotary switch setting: DHW Install . . . . . . . . . 45
6.4 Rotary switch setting: Operating Mode . . . . . 45
6.5 Rotary switch setting: Set Temp Day . . . . . . . 46
6.6 Rotary switch setting: Set Temp Night . . . . . . 46
6.7 Rotary switch setting: DHW Set Temp . . . . . . 46
6.8 Rotary switch setting: Time Program . . . . . . . 47
6.9 Rotary switch setting: Remote Param . . . . . . 47
6.10 Rotary switch setting: Info . . . . . . . . . . . . . . . 48
6.11 Exit button: Sonderfunktion . . . . . . . . . . . . . . . 48
6.12 Parameter level "Basic Configuration" . . . . . . 49
6.13 Parameter levels for the RoCon M1 
mixer module. . . . . . . . . . . . . . . . . . . . . . . . . . 49
6.13.1 Rotary switch setting: Configuration,
level "Setup" . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
6.13.2 Rotary switch setting: Configuration,
level "Mixer Config" . . . . . . . . . . . . . . . . . . . . . . . 51
7 Errors, malfunctions and messages . . . . .53
7.1 Recognising errors, correcting malfunctions . . 53
7.1.1 Current fault display . . . . . . . . . . . . . . . . . . . . . . 53
7.1.2 Read Protocol . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
7.1.3 Troubleshooting. . . . . . . . . . . . . . . . . . . . . . . . . . 53
7.2 Emergency operation . . . . . . . . . . . . . . . . . . . 54
7.3 Malfunctions and fault codes. . . . . . . . . . . . . . 54
8 Glossary. . . . . . . . . . . . . . . . . . . . . . . . . . . .55

List of contents
FA ROTEX RoCon HP - 06/2015 3
9 Notes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .56
9.1 User-specific settings . . . . . . . . . . . . . . . . . . . .56
9.1.1 Switching time program. . . . . . . . . . . . . . . . . . . . 56
9.1.2 Parameter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
9.1.3 IDs in the RoCon CAN bus system . . . . . . . . . . . 57
9.2 Other items . . . . . . . . . . . . . . . . . . . . . . . . . . . .58
10 List of keywords . . . . . . . . . . . . . . . . . . . . .59

4FA ROTEX RoCon HP - 06/2015
1xSafety
1 Safety
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:
– Installation and maintenance instructions
– Operating instructions for the user/owner
– Commissioning checklist
– The operating manual for the user/owner
– 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 ROTEX HP convector is connected; the associated instal-
lation and operating instructions.
– If a different ROTEX heater or optional accessories are con-
nected; 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
Risk of burning or scalding
Validity
Some information in this manual has limited validity. The validity
is highlighted by a symbol.
Only valid for ROTEX HPSU compact with cooling
function
Valid/available only if a room station (RoCon U1) is con-
nected
Valid/available only if a mixer module (RoCon M1) is con-
nected
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.
Display readouts of the RoCon-Control unit
Entry into a setting procedure
Exit from a setting procedure
Certain screen displays or menu points may differ from those
shown in these instructions due to country or equipment varia-
tions in the ROTEX HPSU compact or the status of the user
logged onto the Control unit.

1xSafety
FA ROTEX RoCon HP - 06/2015 5
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
can lead to serious injuries or death, as well as causing material
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 ROTEX the regulating
system RoCon. The ROTEX RoCon HP may only operated only
according to the indications in this manual.
Any other use outside the intended use is considered as im-
proper. The operator alone shall bear responsibility for any re-
sulting 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.

6FA ROTEX RoCon HP - 06/2015
2xProduct description
2 Product description
The Control unit RoCon HP is part of the ROTEX HPSU
compact.
It consists of the RoCon BM1 control panel to which
the actuators and sensors, as well as other compo-
nents in the ROTEX RoCon regulating system, are con-
nected, and the RoCon B1 operating unit.
In this instruction manual we explain just the functions
and setting possibilities of the Control unit. More infor-
mation on the ROTEX HPSU compact and other
equipment components can be found in the supple-
mentary documents.
The electronic, digital Control unit 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 corre-
sponding fault message shows the operator all the information for
fault causes.
All function settings for the ROTEX HPSU compact and the op-
tional RoCon devices connected via the data bus are carried out
with the operating elements of the integrated RoCon B1 control
panel 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 RoCon HP control unit has a frost protection
function for the direct heating circuit and the storage tank
charging circuit, as well as an automatic function for heating
support (inclusion of an additional source of heat such as a wood-
burning boiler or solar installation).
The potential-free AUX switching contact can be used to carry out
different control functions in conjunction with external devices
(demand from an external heat generator, switching to bivalent
operating mode, external status display, etc.).
In addition, it also has several inputs for assessing external
control contacts (external operating mode switching or heat
demand, SMART GRID- and low-tariff EVU functions(1.
(1 Energy supply company (EVU) sends signals that are used for controlling the
power mains loading, and which have an influenceon the cost of the power and
availability.
With the optional outside temperature sensor RoCon OT1
(15 60 70), which is installed on the north side of the building,
you can optimise the weather-dependent flow temperature
control.
If the optional gateway RoConG1 ( 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 unit RoCon HP contains a timer which can be used
to set:
– 2 individually-adjustable timer programmes (2 for room heat-
ing and room cooling (direct heating circuit),
– 2 individually-adjustable timer programmes for hot water gen-
eration,
– 1 individually-adjustable timer programme for an optional cir-
culation pump.
(2 Use of the timer programme for room cooling only possible in combination with
a connected room thermostat
Initial commissioning of the heating system is described in the in-
stallation manual for the ROTEX HPSU compact.
Certain menu items in the Control unit RoCon HP are only acces-
sible to the specialist heating technician. This security measure
ensures that no undesirable malfunctions arise during operation
of the system through incorrect settings.
The RoCon U1 room station has the same operating panel as the
ROTEX HPSU compact B1 operating element integrated in the
RoCon.
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).
An RoCon M1 connected mixer module will also be operated,
after appropriate allocation, by the RoCon B1 control unit and/or
the RoCon U1 room station.

3xOperation
FA ROTEX RoCon HP - 06/2015 7
3 Operation
3.1 General
DANGER!
If electrical components come into contactwith water,
this can cause an electric shock as well as potentially
fatal injuries and burns.
ƔThe displays and the buttons on the Control unit
must be protected from the effects of moisture.
ƔTo clean the Control unit 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
ROTEX HPSU compact at the lowest possible return
flow and hot water temperatures.
If an external heat generator (e.g. the optional Backup
Heater) is used at inflow target temperatures of over
50°C, the efficiency (COP) of the ROTEX HPSU
compact can be affected negatively (depending on the
outside temperature).
3.2 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 Program
13 Exit button
Fig. 3-1 Arrangement of display and operating elements
3.2.1 Display
All the operating steps are supported by appropriate displays in a
clear text display on a coloured background.
Menu navigation is available in 7 different languages
(see section 3.4.8).
Malfunctions are generally indicated by a fault code and
a clear text fault message on the display.
For troubleshooting instructions refer to chapter 7.
The colour of the backlighting indicates the operational status
and the operational mode:
White: Standard lighting, normal operational display.
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 technician authori-
sation.
1 Date display
2 Status of refrigerant com-
pressor
3 Status display (e.g. Techni-
cian access rights active)
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. 3-2 Display of the Control unit - standard display

8FA ROTEX RoCon HP - 06/2015
3xOperation
Explanation of symbols
Item
fig 3-2 Symbol Explanation
2Flashing: Heat pump demand active
Permanently on: Refrigerant compressor is
working
2No connection to the external heat pump
unit
3Access Rights Expert active
(see section 3.6.1)
2 / 3 Air Purge active (see section 3.6.10)
2 / 3 Terminal function active (see section 3.4.9)
2 / 3 Frost protection function active
(see section 3.6.5)
2 / 3 "Party" temporary timer programme active
(see section 3.4.7)
2 / 3 "Away" temporary timer programme active
(see section 3.4.7)
2 / 3 "Holiday" temporary timer programme
active (see section 3.4.7)
2 / 3 "Vacation" temporary timer programme
active (see section 3.4.7)
2 / 3 Screed Program active (see section 3.6.13)
5 Direct heating circuit
– Under normal conditions, the current
inflow temperature tV, BH is displayed.
– In the case of no demand from the heat
pump, the abbreviation "ES" is dis-
played instead of the current flow tem-
perature.
ÎThe control system has switched to
energy saving mode
(see section 3.4.2). Superfluous
electronic components are
switched off.
5Mixer circuit
The current inflow temperature of the se-
lected heating circuit is displayed.
5Room temperature sensor
The current room temperature is displayed.
6 Heating circuit status
– Heating circuit active (room heating
function)
– Heating circuit active (room cooling
function)
– Heating circuit not active (currently no
heat transfer in the heating circuit)
7Outside temperature sensor
The current outside temperature is dis-
played.
8 Current operating mode (see section 3.4.2)
Standby active
Reducing active
Heating active
Cooling active
Summer active
Automatic 1 active
Automatic 2 active
9Domestic hot water generation active
Domestic hot water generation not active
10 Domestic hot water circuit status
The current storage tank temperature
tDHW1 is displayed.
Tab. 3-1 Explanation of display symbols
3.2.2 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 unit 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 op-
tions.
Independent of the setting of the rotary switch, the
ROTEX HPSU compact operates in accordance with
the operating mode set in the switch position "Oper-
ating Mode" or which has been activated by a
special programme.
Action Result
Rotating
Direct selection of the main function level allo-
cated to this switch position.
Tab. 3-2 Function of rotary switch
Item
fig 3-2 Symbol Explanation

3xOperation
FA ROTEX RoCon HP - 06/2015 9
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
Pressing
Confirm, accept, selection and execute the
function.
Tab. 3-3 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 3.5).
Action Result
Brief pressing. – Jump back to the previous display or pre-
vious level or
– Cancellation of a special function or an
active temporary timer programme.
Pressfor more
than 5 secs.
– Special level is called up.
Tab. 3-4 Functions of the exit button
3.3 Operating concept
The operating concept for controlling the RoCon HP is structured
in such a way that the frequently required settings options are ac-
cessible quickly and directly at the mainfunction level (selection
using the rotary switch), while the less frequently required set-
tings options are arranged at a lower parameter level.
1 Info (section 3.4.1)
2 Operating Mode (section 3.4.2)
3 Set Temp Day (section 3.4.3)
4 Set Temp Night (section 3.4.4)
5 DHW Set Temp (section 3.4.5)
6 DHW Install (section 3.4.6)
7 Time Program (section 3.4.7)
8 Configuration (section 3.4.8)
9 Remote Param (section 3.4.9)
Fig. 3-3 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 technician
(see section 3.6.1).
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 "Configuration" rotary switch
position (see section 3.4.8).
When the system is switched on, based on the stipulations set in
the Control unit RoCon HP, it fully automatically regulates the
operation of the
– room heating, room cooling 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 "Operating Mode"
switch position or that 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.

10 FA ROTEX RoCon HP - 06/2015
3xOperation
The operating mode can be affected by additional functions such
as:
– Weather-controlled flow temperature regulation
– Switching time program
– Setting the temperature target value
– Setting at the room station
– Setting on room thermostat
– Switch status at EXT input (external operating mode switcho-
ver)
– Switch status at EBA input (external demand request)
– Quite Mode
– Interlink fct
– Switch status at SMART GRID input (EVU function SMART
GRID)
– Switch status at EVU input (EVU function HT/NT (low tariff) or
SMART GRID)
– Defrosting function
– Frost protection function
– Screed function
–AirPurge
– Manual Operation
Button block
The operating panel on the RoCon HP can be blocked to prevent
inadvertent actuation (see fig 3-4).
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 section 6.2.1
tab. 6-1).
Keylock Function
On
Keylock Function
Keylock Function
Off
Fig. 3-4 Activating button lock (1.) and deactivating (4.)
3.4 Basic functions and operating modes
If the storage temperature falls below a certain
minimum value, the safety settings of the ROTEX
HPSU compact prevent the operation of the heat pump
in the case of low external temperatures:
–External temperature < -2°C, minimum storage
temperature = 30°C
–External temperature < 12°C, minimum storage
temperature = 23°C.
Without backup heater:
The storage tank water must be heated to the minimum
required storage temperature by an external heater.
With Backup Heater (BUxx):
With an outdoor temperature < 12°C and a storage
tank temperature < 35°C, the Backup Heater (BUxx) is
switched on automatically on in order to heat up the
storage tank water to at least 35°C.
ƔIn order to accelerate the heating process with
the back-up heater, temporarily
– Parameter [Function Heating Rod] = "1" and
– Set parameter [Power DHW] to the maximum
value of the back-up heater.
– Set rotary switch to the operating mode and
PARAMETER [1x Hot Water] to "On".
Automatic defrosting 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 automatically
and starts the defrosting function.
During the defrosting function, heat is drawn from the hot water
storage tank and the backup heater is turned on if required. De-
pending on the heat demand for the defrosting function, heating
of the direct heating circuit may be interrupted temporarily.
After 8 minutes at most, the system returns to normal mode.
3.4.1 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 3-2).
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 3-6).
ƔSelect the individual information with the rotary switch.
More detailed explanations and possible setting values for this rotary switch setting
can be seen in tab. 3-5 and in section 6.10.

3xOperation
FA ROTEX RoCon HP - 06/2015 11
Display operating data overview
The current operating data for the ROTEX HPSU compact are
shown on the RoCon HP Control unit in the "Overview" infor-
mation level.
The display of the operating data is not divided into several
windows. By adjusting the rotary switch it is toggled between the
windows.
Short
desig-
nation
Explanation of the displayed value
Page 1
Mode Current mode of the heat pump:
- - -: No heating or cooling demand
: Heating
: Cooling
: Domestic hot water generation
: Automatic defrosting function active
Ext Current energy mode of the heat pump:
LT: EVU function HT/NT active and low tariff.
HT: EVU function HT/NT active and high tariff.
SGN: EVU function SMART GRID active, normal
mode.
SG1: EVU function SMART GRID active, discon-
nection: no heat pump operation, no frost
protection function.
SG2: EVU function SMART GRID active, switch-
on recommendation, mode with higher set temper-
atures, cheap power.
SG3: EVU function SMART GRID active, switch-
on command and storage tank charging to 70°C,
cheap power
- - -: No external mode active, heat pump works in
normal mode.
RT Parameter [Room thermostat] / [Interlink fct] 
= Off: - - -
Parameter [Room thermostat] = On:
–: Heating or cooling demand
–: No heating demand
Parameter [Interlink fct] = On (priority):
– - - -: only frost protection
– IL1: normal inflow target temperature
–IL2:
– increased inflow target temperature in
heating operation
– decreased inflow target temperature in
cooling operation
Pump Actual output of the internal heating circulation
pump in %
EHS Current output of the backup heater in kW
BPV Current position of the mixing valve 3UVB1
(100% = A, 0% = B)
Page 2
TV Current inflow temperature after the plate heat ex-
changer (tV1)
TVBH Current heating inflow temperature or temp. after
heating support heat exchanger (tV, BH)
TR Current heating return flow temperature (tR1)
Tdhw Current temperature in domestic hot water storage
tank (tDHW1)
TA Actual outdoor temperature (measured by optional
temperature sensor RoCon OT1)
V Actual volume flow (flow rate) in the heating
system
Page 3
TVBH2 = TVBH
TR2 Current heating return flow temperature, sec-
ondary sensor (tR2)
Tdhw2 Current temperature in domestic hot water storage
tank, secondary sensor (tDHW2)
Tliq2 Current coolant temperature (tL2)
TA2 Actual outdoor temperature (measured by temper-
ature sensor of the external heat pump)
quiet Shows the status of the whisper mode
Tab. 3-5 Description of the operating data displayed as an overview
Info
Overview
Water Pressure
Off
Fig. 3-5 Display operating data overview
Short
desig-
nation
Explanation of the displayed value

12 FA ROTEX RoCon HP - 06/2015
3xOperation
Displaying the water pressure
On the Control unit 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 after the operating data overview
(see fig 3-6).
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 ROTEX HPSU
compact, chapter "Inspection and Maintenance").
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. 3-6 Info values display (e.g. system pressure)
3.4.2 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. 3-7 Switching the operating mode 
(e.g.: from "Standby" to "Automatic 1")
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 and there is a
risk of frost, the power supplies must be secured
and the external main switch must remain switched
on.
In this mode, the ROTEX HPSU compact is shifted to the stand-
by mode. The frost-protection function (see section 3.6.5) re-
mains in place. In order to maintain this function, the system must
not be disconnected from the mains!
All controllers integrated into the RoCon-system via the CAN bus
are also switched at a higher level to the operating mode
"Standby".

Fig. 3-8 Standard display in "Standby" operating mode 
(above the frost-protection limit)
In the "Standby" operating mode, the heat pump and
any optionally connected backup heaters are isolated
from the power supply (Energy saving mode) 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 (parameter
[Outside Config] = On),
– 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
– ROTEX HPSU compact has been switched on for at
least 5 mins.
3xOperation
FA ROTEX RoCon HP - 06/2015 13
Operating mode Reducing
Reduced heating mode (lower set room temperature) in ac-
cordance with the target flow temperature set for economy mode
in the parameter [T-Reduced] (see section 3.4.4).
Hot water generation according to the set target domestic hot
water temperatures and switching cycles in the hot water time
programme [DHW Program 1] (see section 3.4.5).
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 3.4.3).
A connected outdoor temperature sensor (weather-controlled
flow temperature regulation) or a connected room station will also
influence the set flow temperature regulation (requirements: Pa-
rameter [HC Function] = On).
Hot water generation according to the set target domestic hot
water temperatures and switching cycles in the hot water time
programme [DHW Program 1] (see section 3.4.5).
Operating mode Summer
Hot water generation according to the set target domestic hot
water temperatures and switching cycles in the hot water time
programme [DHW Program 1] (see section 3.4.5).
All controllers integrated into 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 3.4.7):
– [HC Program 1]
– [DHW Program 1]
Operating mode Automatic 2 (Timer programme)
Automatic heating and economy mode in accordance with the
permanent timer programmes (see section 3.4.7):
– [HC Program 2]
– [DHW Program 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 3.4.6).
Switching contact for external operating mode
switching
Likewise, the operating mode (see tab. 3-6) can be
switched from an external device (e.g. modem, etc.) via
a potential-free switching contact which is connected to
a resistor and to the terminals "EXT" at the J8 port on
the ROTEX 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. 3-6 Resistance values for the evaluation of the EXT signal
The resistances specified in tab. 3-6 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.
If several switching contacts are to be connected to the
ROTEX HPSU compact (e.g. SMART GRID, Room
thermostat), the associated functions can have a higher
priority than the external operating mode switching. The
operating mode requested by the EXT switching
contact might then not be activated or may be activated
later.
In addition to these operating modes there are various different
temporary heating programmes available (see tab. 3-7), which
run according to priority after they have been activated.

Temporary
timer
programme
Setting /
activating in
level
Rotary
switch
setting
Note
DHW Install DHW Install section
3.4.6
Party
Time Program

section
3.4.7
Away
Holiday
Vacation
Screed*
Configuration >
HC Configura-
tion
section
3.6.13
14 FA ROTEX RoCon HP - 06/2015
3xOperation
* only with expert code.
Tab. 3-7 Overview of temporary timer programmes
If a temporary timer programme (DHW Install, Party,
Away, Holiday, Vacation, Screed) is started during the
selected operating mode, the regulation will take place
with preference according to the settings of this timer
programme.
3.4.3 TemperaturesettingDaytimeroomtemperature
The set room temperatures for room heating during the day are
determined in the rotary switch setting .
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 dis-
play.
More detailed explanations and possible setting values for this rotary switch setting
can be seen in section 6.5.
3.4.4 Temperature setting Economy mode
The set room temperatures for room heating in economy mode
are determined in the rotary switch setting .
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 "Reducing" operating mode or
setback 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 section 6.6.
3.4.5 Temperature setting hot water generation
The hot water set temperatures for hot water generation for each
individual timer programme are determined in the rotary switch
setting .
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 dis-
play.
More detailed explanations and possible setting values for this rotary switch setting
can be seen in section 6.7.
3.4.6 Unscheduled hot water generation
You can charge the hot water up manually outside a hot water
timer programme to the preset temperature set in parameter 
[T-DHW Setpoint 1] in the rotary switch position . 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.
ÎBegin unscheduled hot water generation.
After this temporary function has expired, the Control
unit automatically jumps back to the previously active
operating mode. The rotary switch should therefore be
returned to the position "Info" after activation.
The function is subject to time limits.
It is interrupted at the latest after the maximum charging
time set in the parameter [Max DHW loading time] and
cannot be restarted once more until the blocking time
set in the parameter [DHW Off Time] has expired
(see section 6.2.4).
More detailed explanations and possible setting values for this rotary switch setting
can be seen in section 6.3.

3xOperation
FA ROTEX RoCon HP - 06/2015 15
3.4.7 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 Program"
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 section 6.8.
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 set tempera-
tures apply.
In the switching cycles the heating system is regulated differen-
tiated into day and economy mode.
The target room temperatures for these timer programmes are
set in the rotary switch 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 Program 1]
– [HC Program 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 Program 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 Program 2 See HC Program 1
1.
2.
3.
See
HC Program 1
Tab. 3-8 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. 3-8:
a) For the single working day "Monday" the start time
for 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 for the
1st switching cycle changed from 07:00 to 08:00.
ÎIn the individual weekdays "Saturday" and "Sun-
day", the 1st switching cycle also automatically
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
possible switching cycles
– [DHW Program 1]
– [DHW Program 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. 3-8).
–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 programmes
are identical to those for the heating circuit timer pro-
gramme (see also tab. 3-8).
For further instructions concerning settings for an op-
tional circulation pump, see section 3.6.15.
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 section 9.1.1).
The permanent timer programmes are preset as per tab. 3-9.

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 Program 1"
Monday - Friday 06:00 22:00 - - : - - - - : - - - - : - - - - : - -
Saturday, Sunday 07:00 23:00 - - : - - - - : - - - - : - - - - : - -
"HC Program 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 Program 1"
Monday - Sunday 00:00 24:00 - - : - - - - : - - - - : - - - - : - -
"DHW Program 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 - - : - - - - : - - - - : - - - - : - -
16 FA ROTEX RoCon HP - 06/2015
3xOperation
Tab. 3-9 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 at any time by manually changing the oper-
ating 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 switching cycle 1, the target room temperature set
in the parameter [T-Room 1 Setpoint] applies.
b) In all other operating modes, the target room temperature
set in the parameter [T-Room 1 Setpoint] applies.
– The hot water generation is not affected.
– The time programme runs for the set time period after acti-
vation.
2. [Away]: Immediate one-off setback up to 6 hours
– The system operates in 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 acti-
vation.
3. [Holiday]: One-off calendar-controlled presence.
– The system operates exclusively in accordance with the
"Sunday" settings in the [HC Program 1].
– The hot water generation operates exclusively in accord-
ance with the "Sunday" settings in the [DHW Program 1].
4. [Vacation]: One-off calendar-controlled reduction.
– The system only operates in economy mode 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 Program 1] (see section 3.4.5).
– The calendar-controlled programme [Vacation] is not
started if the operating mode [Standby] or [Manual Oper-
ation] is active on the set start date.

3xOperation
FA ROTEX RoCon HP - 06/2015 17
3.4.8 System settings
We undertake the basic settings for the Control unit RoCon HP
and the system configurations for the installation environment of
the ROTEX HPSU compact, the direct heating circuit, the hot
water generation and any optionally connected components in
the rotary switch setting "Configuration" .
Depending on access authority (user or expert), various different
parameters are available. Certain parameters are only acces-
sible to the heating expert.
Setting the Language, Date, Time
An internal pre-programmed calendar ensures auto-
matic time reset at the annually recurring
summer/winter time changes.
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 [Language],
[Date] or [Time] parameters.
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 dis-
play.
More detailed explanations and possible setting values forthis rotary switch setting
can be seen in section 3.6 and in section 6.2.
3.4.9 Terminal function
In the rotary switch setting "Remote Param" we can also
operate and parametrise other devices integrated via the CAN
bus in the RoCon system (regulating components mixer module
or heat exchanger), provided that the individual component has
the necessary authority (see also section 4.3).
After activation of the "Bus -
Scan" a list of the equipment
that was recognised is shown
for selection in the display (ex-
ternal equipment and local
equipment).
After selection and confirming
an external device, the terminal
function for this device is acti-
vated and the associated
standard display for this device
is shown in the display.
The operating component is
then in terminal mode.
Remote Param
Bus - Scan
No selection
Fig. 3-9 Display of the level "Re-
mote Param" at commis-
sioning or temporary
disconnection from the
mains
The local control element acts as the remote control for the ex-
ternal equipment. In this case all the control functions are pro-
vided and saved 1:1 as on the external equipment.
The various different application and parametrisation possibilities
for using the devices and operating components combined in the
RoCon system are described in section 4.3.
Remote Param
Bus - Scan
No selection
Remote Param
Bus - Scan
No selection
Remote Param
No selection
Contr BM1/BE1 #X
Mix Valve #X
Remote Param
Contr BM1/BE1 #X
Mix Valve #X
Remote Param
Contr BM1/BE1 #X
Mix Valve #X
B1 Operating component RoCon B1 of the HPSU compact
Bus CAN-Bus (connection line between RoCon devices

and operating components)
H1Direct heating circuit (e.g. radiators)
H2Mixed heating circuit (e.g. underfloor heating)
M1 Mixer module RoCon M1
U1 Room station RoCon U1
WE1 Heat generator HPSU compact
Fig. 3-10 Example for "Bus - Scan" on a heating system with 1 heat gen-
erator, 1 mixer, 1 room station and activation of the terminal
function for remote control of the mixer module
During this activated terminal function, the header of the display
carries additional information on the remotely controlled
equipment; the symbol #X is displayed, where "X" indicates
the bus ID setting for the remotely controlled equipment.

18 FA ROTEX RoCon HP - 06/2015
3xOperation
The displayed values and symbols are always taken over from
the selected equipment (such as the mixer circuit infeed temper-
ature of the mixer module RoCon M1 with device ID 1).
Fig. 3-11 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 the message "n. A." is displayed at rotary switch set-
ting , 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 in such cases.
Activating / deactivating normal operation
Requirement: A valid terminal ID has been allocated to the
control unit RoCon B1 of the ROTEX HPSU compact or room
station RoCon U1 ( 15 70 34).
For setting the terminal address of optional connected
equipment, see section 4.4 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.
ƔUse the rotary switch to select the parameter [Bus - Scan] and
confirm with "Yes".
ÎBus - Scan is performed.
ÎAn overview of all the equipment found is displayed
(example see fig 3-10).
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.
After interim isolation from the power supply, at the
level "Remote Param", we always show the display as
shown in fig 3-9.
In order to be able to use the terminal function for con-
nected equipment, a new Bus - Scan must be carried
out.
Communication between the RoCon system compo-
nents continues to function, even without a Bus - Scan,
and previously made settings remain active.
Activation of the terminal function is carried out as
shown in fig 3-10, but, after confirmation of the display
"Bus - Scan", you must select the parameter [New
scan?] with the rotary button, and confirmed with "Yes".
3.4.10 Quite Mode
Quite 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 Quite 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.
Quite Mode activation / deactivation
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 [Quite Mode] with the rotary switch.
ƔConfirm the changes with a brief push of the rotary switch.
ÎThe setting for the parameter is displayed.
ƔSetting parameters
– Parameter [Quite Mode] = 0: deactivated
– Parameter [Quite Mode] = 1: permanently activated
– Parameter [Quite Mode] = 2: only activated at night
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 function can be seen
in section 6.2.2.
3.4.11 SMART GRID (SG)
WARNING!
There is a danger of scalding at target hot water tem-
peratures over 60°C. This is possible as the electric
utilities company (EVU) is entitled to control the elec-
tricity consumption optimally in accordance with sup-
ply and demand in the SMART GRID regulations.
Due to the forced charging, the target hot water tem-
perature in the hot water storage tank can reach over
60°C.
This storage tank charging even takes place when the
"Standby" operating mode it set.
ƔInstall scald protection in the hot water distribution
line (e.g. VTA32, 15 60 15 + Screw
connection set 1", 15 60 16).

3xOperation
FA ROTEX RoCon HP - 06/2015 19
You will need a special electric meter with an SG receiver for this
function, and the ROTEX 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 an operating mode in ac-
cordance with tab. 3-10, depending on the signal from the energy
supply company.
Signal 2) Cost of
electricity Effect on
EVU SG Hot water Heating
10 - - - No operating mode 1) No operating mode 1)
0 0 normal Normal operating
mode
Normal operating
mode
0 1 low The switch-on recom-
mendation and set
value storage tank
temperature is in-
creased, depending
on the parameter
[Mode SG]
The switch-on recom-
mendation and inflow
target temperature
are increased de-
pending on the pa-
rameter [Mode SG]
1 1 very
low
Switch-on command
and set value of stor-
age tank temperature
is set to 70°C
Switch-on command
for storage tank
charging
1) No frost-protection function (see section 3.6.5).
2) Switch contacts at input J8 of the circuit board RoCon BM1 closed (1) or
opened (0).
Tab. 3-10 Utilisation of the SG signal
More detailed explanations and possible setting values for this function can be seen
in section 6.2.1.
3.5 Special functions
In the "Special Level" we can carry out various different func-
tions that are usually used by the heating expert.
The following special functions are possible:
– Manual mode (see section 3.5.1).
– Message display (see chapter 7)
– Resetting to factory settings (see section 3.6.12)
More detailed explanations of these functions can be found in section 6.11.
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:
– Pressing the exit button again, or
– Briefly pressing the rotary switch or
– Selecting a different menu using the rotary switch.
3.5.1 Manual Operation
Manual Operation is used 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 inflow target temperature
set in manual mode is adequate to achieve the stored hot water
set temperature (parameter [T-DHW Setpoint 1]).
ƔDepress the exit button for at least 5 secs.
ÎMenu "Special Level" is displayed.
ƔSelect the programme "Manual Operation" with the rotary
switch.
ƔConfirm the changes with a brief push of the rotary switch.
Î"Manual Operation" active.
ƔSet the inflow target temperature with the rotary switch.
Do not confirm the setting with the rotary switch,
as this will close the programme.
ÎDuring active manual mode the hot water is consistently
regulated to the parameter value for the first target hot
water temperature ([T-DHW Setpoint 1]).
ÎThe button block (if it was activated from the start of this
function), is activated again within 2 seconds in order to
prevent inadvertent termination of the function by operat-
ing the Control unit RoCon HP.
ƔCancellation and jump back by:
– Pressing the exit button again, or
– Briefly pressing the rotary switch or
– selecting a different menu using the rotary switch.
ÎIf the manual mode is closed, the Control unit RoCon HP
automatically switches to the operating mode "Standby".
Manual Operation
Special Level
Attention!
Actual mode:
Special Level
Manual Operation
FA failure
Set Actual
Fig. 3-12 Brief symbol-based instructions for manual mode

20 FA ROTEX RoCon HP - 06/2015
3xOperation
3.5.2 Reference run 3-way diverter valve
The positions of the two 3-way diverter valves 3UVB1 and
3UV DHW in the ROTEX HPSU compact are regulated between
their two basic settings in a step-less manner for optimised
energy utilisation (e.g. heating support function).
The two 3-way diverter valves are always automatically moved,
on days of the week "Monday", "Wednesday" and "Friday", by
11:00 in each case, to their base position (bypass - way AB-A
open).
This function can take up to 5 minutes. It is rigidly programmed
and cannot be changed.
3.6 Special system settings
The Control unit 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.
3.6.1 Access Rights (Technician password)
Certain settings are restricted by Control unit 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 3-13 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
Language
Date
Setup
Keylock Function
Access Rights
Outdoor type
Access Rights Access Rights
Access Rights
Fig. 3-13 Entering the access code