Bosch WORCESTER Sense II User manual

UK/IE
Installation instructions
Advanced Weather Compensation Controller
Sense II
6 720 812 774-01.1O
6 720 818 367 (2015/10)

2
Contents
Sense II – 6 720 818 367 (2015/10)
Contents
1 Explanation of symbols and safety instructions . . . . 3
1.1 Explanation of symbols . . . . . . . . . . . . . . . . . . . . 3
1.2 General safety instructions . . . . . . . . . . . . . . . . . 3
2 Product information . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
2.1 Product description . . . . . . . . . . . . . . . . . . . . . . . 4
2.1.1 Control types . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
2.1.2 Application options in different heating systems 4
2.2 Important notices on usage . . . . . . . . . . . . . . . . . 5
2.3 Declaration of Conformity . . . . . . . . . . . . . . . . . . 5
2.4 Scope of delivery . . . . . . . . . . . . . . . . . . . . . . . . . 6
2.5 Technical data . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2.6 Energy efficiency . . . . . . . . . . . . . . . . . . . . . . . . . 7
2.7 Temperature sensor characteristics . . . . . . . . . . 7
2.8 Additional accessories . . . . . . . . . . . . . . . . . . . . . 7
2.9 Applicability of the technical documentation . . . 8
2.10 Disposal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
3 Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
3.1 Types of installation . . . . . . . . . . . . . . . . . . . . . . . 8
3.2 Installation location of the user interface . . . . . . 8
3.3 Installation in the reference room . . . . . . . . . . . 10
3.4 Electrical connection . . . . . . . . . . . . . . . . . . . . . 10
3.5 Fitting/Removing the controller . . . . . . . . . . . . 11
3.6 Installation in the heat source . . . . . . . . . . . . . . 11
3.7 Installing the connector with link . . . . . . . . . . . 12
3.8 Installing the blue connector . . . . . . . . . . . . . . . 13
3.9 Installation of an outside temperature sensor . 14
4 Basic principles of operation . . . . . . . . . . . . . . . . . . . 15
4.1 Overview of the control elements . . . . . . . . . . . 15
4.2 Overview of the symbols in the display . . . . . . 17
4.3 Operating the service menu . . . . . . . . . . . . . . . 19
4.4 Overview of the service menu . . . . . . . . . . . . . . 20
5 Commissioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
5.1 Overview over the commissioning steps . . . . . 21
5.2 General commissioning of the Sense II . . . . . . . 21
5.3 System commissioning with the configuration
wizard . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
5.4 Commissioning other settings . . . . . . . . . . . . . 24
5.4.1 Checklist: Adjusting settings to customer
requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
5.4.2 Important settings for the heating system . . . . 24
5.4.3 Important settings for the DHW system . . . . . . 24
5.4.4 Important settings for the solar system . . . . . . 24
5.4.5 Important settings for the hybrid system . . . . . 24
5.4.6 Important settings for cascades . . . . . . . . . . . . 24
5.5 Perform function tests . . . . . . . . . . . . . . . . . . . . 24
5.6 Check monitored values . . . . . . . . . . . . . . . . . . 24
5.7 System handover . . . . . . . . . . . . . . . . . . . . . . . . 24
6 Shutting down/Switching off . . . . . . . . . . . . . . . . . . . 25
7 Service menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
7.1 Heating system settings . . . . . . . . . . . . . . . . . . 29
7.1.1 System data menu . . . . . . . . . . . . . . . . . . . . . . . 30
7.1.2 Boiler data menu . . . . . . . . . . . . . . . . . . . . . . . . 31
7.1.3 Heating circuit 1 – 4 . . . . . . . . . . . . . . . . . . . . . 33
7.1.4 Screed drying menu . . . . . . . . . . . . . . . . . . . . . . 40
7.2 DHW settings . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
7.3 Solar system settings . . . . . . . . . . . . . . . . . . . . 44
7.4 Settings for hybrid systems . . . . . . . . . . . . . . . 45
7.5 Settings for cascade systems . . . . . . . . . . . . . . 45
7.6 Diagnosis menu . . . . . . . . . . . . . . . . . . . . . . . . . 45
7.6.1 Function test menu . . . . . . . . . . . . . . . . . . . . . . 45
7.6.2 Monitored values menu . . . . . . . . . . . . . . . . . . . 45
7.6.3 Fault display menu . . . . . . . . . . . . . . . . . . . . . . . 47
7.6.4 System information menu . . . . . . . . . . . . . . . . . 47
7.6.5 Maintenance menu . . . . . . . . . . . . . . . . . . . . . . 47
7.6.6 Reset menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
7.6.7 Calibration menu . . . . . . . . . . . . . . . . . . . . . . . . 48
8 Eliminate fault . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
9 Environment / disposal . . . . . . . . . . . . . . . . . . . . . . . . 52
10 Commissioning report . . . . . . . . . . . . . . . . . . . . . . . . . 52
Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58

3
Explanation of symbols and safety instructions
Sense II – 6 720 818 367 (2015/10)
1 Explanation of symbols and safety
instructions
1.1 Explanation of symbols
Warnings
The following keywords are defined and can be used in this
document:
•NOTICE indicates a situation that could result in damage to
property or equipment.
•CAUTION indicates a situation that could result in minor to
medium injury.
•WARNING indicates a situation that could result in severe
injury or death.
•DANGER indicates a situation that will result in severe
injury or death.
Important information
Additional symbols
1.2 General safety instructions
These installation instructions are intended for plumbers,
heating engineers and electricians.
▶ Read the installation instructions (heat appliances,
modules, etc.) before installation.
▶ Observe safety instructions and warnings.
▶ Observe national and regional regulations, technical rules
and guidelines.
▶ Keep a record of any work carried out.
Determined use
▶ The product must only be used for controlling heating
systems.
Any other use is considered inappropriate. Any damage that
may result is excluded from liability.
Installation, commissioning and maintenance
Installation, commissioning and maintenance must only be
carried out by a competent person .
▶ Never install the product in wet rooms.
▶ Only install genuine spare parts.
Electrical work
Electrical work must only be carried out by qualified
electricians.
▶ Before carrying out electrical work:
– Isolate all poles of the mains voltage and secure against
reconnection.
– Using suitable means, test that the power supply is
disconnected.
▶ Never connect the product to mains voltage.
▶ Also observe connection diagrams of other system
components.
Handover to the user
When handing over the heating system, explain the operating
conditions to the user.
▶ Explain how to operate the heating system, with particular
emphasis on all safety-related actions.
▶ Explain that conversions and maintenance must only be
carried out by a competent person.
▶ Highlighted the need for inspections and maintenance for
safe and environmentally friendly operation.
▶ The installation and operating instructions must be given to
the user for safekeeping.
Damage caused by frost
The system can freeze if it is switched off:
▶ Observe the notices regarding frost protection.
▶ Due to the additional functions, e.g. DHW heating or pump
anti-seizure protection, the system should always be left
switched on.
▶ Correct any faults immediately.
Warnings in this document are identified by a
warning triangle printed against a grey
background.
Keywords at the start of a warning indicate the
type and seriousness of the ensuing risk if
measures to prevent the risk are not taken.
This symbol indicates important information
where there is no risk to people or property.
Symbol Meaning
▶ Action step
Cross-reference to another part of the document
• List/list entry
– List/list entry (second level)
Table 1 Additional symbols

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Product information
Sense II – 6 720 818 367 (2015/10)
2 Product information
2.1 Product description
• The Sense II controller controls up to a maximum of 4
heating circuits. In addition 2 cylinder primary circuits, one
solar Domestic Hot Water (DHW) heating as well as one
solar circuit for central heating backup can be controlled.
• The controller has time programs:
– Heating systems: For each heating circuit, 2 time
programs with 6 switching times per day can be set
(exception: for one constant heating circuit there is
only 1 time program).
– Domestic hot water: A time program for DHW heating
and a time program for the DHW circulation pump for
each hot water circuit, each with 6 switching times per
day.
• The controller displays information about the heat source
(i.e. boiler) and heating system and is used to change the
settings.
• Installation possibilities:
– In a heat source with an EMS 2 BUS interface (Energy
Management System) or a 2-wire BUS cable.
– On a wall with BUS connection to a heat source with a
2-wire BUS interface or EMS 2.
• After operating for 1.5 hours, the controller has a power
reserve of at least 8 hours. If the power failure lasts longer
than the power reserve, the time and date will be deleted.
All other settings are saved.
• The functionality and menu structure of the controller is
determined by the type of heating system that the
controller is connected to. These instructions describe the
controller's full functionality. Your attention is drawn to the
importance of the system structure in the relevant places.
The adjustment ranges and default settings may differ from
the information in these instructions.
2.1.1 Control types
The following control types are available:
•Room temperature-dependent: Automated control of the
flow temperature or the heat output of the heat source
based on the room temperature. Installation of the
controller in the reference room is required.
•Weather-compensated: Automated control of the flow
temperature based on the outside temperature.
•Weather-compensated with the influence of the room
temperature: Automated control of the flow temperature
based on the outside temperature and room temperature.
Installation of the controller in the reference room is
required.
•Constant: Automated control of the flow temperature for
the heating of swimming pool or ventilation unit with
constant temperature. This control type is independent of
the room or outside temperature.
For further information on the control types (Control types,
page 35).
2.1.2 Application options in different heating systems
In a BUS system, only one controller can carry out the
calculations for a heating circuit. Consequently, only one
Sense II programming unit may be installed in each heating
system. The controller serves as controller in:
• Systems with one heating circuit, e.g. in a detached house
• Systems with two or more heating circuits, e.g.:
– underfloor heating system on one floor, panel radiators
on the other
– Living space in combination with an area used for
commercial usage. (Fig. 1, [1])
• Systems with several heating circuits with remote controls,
e.g.:
– House with annex with Sense II as controller and
Sense I as remotecontrol(installationofSense II in the
reference room of the house, Sense I in the reference
room of the annex, Fig. 1, [2])
– House with several annexes or wings (Sense II as
controller and Sense I as remote control, installation of
Sense II in the heat source).
There are heat sources that have integrated
weather-compensated control. In such heat
sources,theintegratedweather-compensated
control must be deactivated.

5
Product information
Sense II – 6 720 818 367 (2015/10)
Fig. 1 Example for heating systems with one or two heating circuits
[1] Sense II ascontroller forseveral (inthis casetwo) heating
circuits (HC 1 and HC 2).
[2] Sense I as the remote control for the second heating
circuit (HC 2) and Sense II as the controller for the first
heating circuit (HC 1).
2.2 Important notices on usage
• The controller may be connected only to heat sources with
an EMS 2 BUS interface (Energy Management System) or a
2-wire BUS interface, such as compatible Greenstar
boilers.
• Only products with EMS 2 BUS may be used within the BUS
system.
• The installation room must be appropriate for protection
level IP20.
2.3 Declaration of Conformity
The design and operation of this product comply
with European Directives and the supplementary
national requirements. Its conformity is
demonstrated by the CE marking .
You can ask for a copy of the declaration of conformity for this
product. For this see the contact address on the back cover of
these instructions.
HC 1
HC 1
HC 2
HC 2
HC 1
6 720 812 773-04.1O
21
Sense I
Sense II Sense II
WARNING: Risk of scalding!
▶ If DHW temperatures above 60 °C are set
or thermal disinfection is switched on, a
mixer must be installed.
NOTICE: Floor damage!
▶ Underfloor heating systems must only be
operated with an additional temperature
limiting switch.

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Product information
Sense II – 6 720 818 367 (2015/10)
2.4 Scope of delivery
Fig. 2 Scope of delivery
[1] Wall mounting plate
[2] Sense II controller
[3] Installation material
[4] Connector with link (to be installed into some heat
sources)
[5] blue connector
[6] Outside sensor
[7] Installation frame for installation in the heat source
[8] Technical documentation
6 720 812 774-10.2O
i
i
1
8
2
6
2x
2x
3
7
4
5
6
14
35
2

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Product information
Sense II – 6 720 818 367 (2015/10)
2.5 Technical data
Fig. 3 Dimensions in mm
2.6 Energy efficiency
The ErP and energy efficiency related product data can be
found in the operating instructions.
2.7 Temperature sensor characteristics
When measuring temperature sensors, observe the following
requirements:
• Isolate the system before measuring.
• Measure the resistance at the cable ends.
• The resistance values represent average values and are
subject to tolerances.
2.8 Additional accessories
•Sense I as simple remote control
•MC 400: Module for a cascade of several heat sources
•MM 100: Module for one heating circuit with mixer,
cylinder primary circuit or constant heating circuit
•MM 200: Module for 2 heating circuits with mixer, cylinder
primary circuits or constant heating circuits
•Greenstar Wiring Centre: Module for systems with two
port valve (S-plan) or mid-position valve (Y-plan).
•MS 100: Module for solar DHW heating
•MS 200: Module for advanced solar systems (wall-
mounted installation only).
6 720 812 774-09.1O
auto
man
adv
menu
info
123 25
32
101
Scope of delivery Chapter 2.4, page 6
Measurements 123 × 101 × 25 mm
(Fig. 3)
Nominal voltage 10 – 24 V DC
Rated power (excluding
illumination)
9 mA
BUS interface EMS 2
Control range 5 °C – 30 °C
Permitted ambient temp. 0 °C – 50 °C
IP rating III
IP rating
• For wall-mounted installation
• in case of installation in the
heat source
• IP20
• IPX2D
Table 2 Technical data
°C  °C  °C  °C 
– 20 2392 – 8 1562 4984 16 616
– 16 2088 – 4 1342 8842 20 528
– 12 1811 01149 12 720 24 454
Table 3 Resistance values for outside temperature sensors
°C  °C  °C  °C 
8 25065 32 9043 56 3723 80 1704
14 19170 38 7174 62 3032 86 1421
20 14772 44 5730 68 2488 – –
26 11500 50 4608 74 2053 – –
Table 4 Resistance values for flow and DHW temperature
sensors

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Installation
Sense II – 6 720 818 367 (2015/10)
Combination is not possible with the following products:
• FR10, FR10, FW100, RC25, RC35, ISM or SC controls
Applicability of these instructions to EMS 2-capable
modules
These instructions also apply to the controller when used in
conjunction with the heating circuit module MM 100/MM 200
(accessory).
Additional setting options may be found in some menus, if your
heating system is equipped with alternative modules (e.g. solar
module MS 100 (accessory)). These setting options are
explained in the technical documentation of the modules.
2.9 Applicability of the technical documentation
Information in the technical documentation about heat
sources, additional controls or modules also apply to the
Sense II.
2.10 Disposal
▶ Dispose of packaging in an environmentally responsible
manner.
▶ When replacing a product or a component, dispose of the
old product or component in an environmentally
responsible manner.
3 Installation
The detailed system schematics for mounting the hydraulic
assemblies and components and the associated controls can
be obtained from your Local Commercial Sales Manager
(Commercial installations only).
3.1 Types of installation
The use of the programming unit and the structure of the overall
system determine how the programming unit should be
installed (Section 2, page 4).
3.2 Installation location of the user interface
If the weather-compensated control (without room
temperature influence) is active, for direct and easy access we
recommend the installation of the controller in the living space.
Alternatively, the controller can also be installed at the heat
source.
The room in your home where the controller is installed is
known as the reference room. If the room temperature-
dependent control is active, the room temperature in this room
serves as the target temperature for the entire system.
If the weather-compensated control with influence of the room
temperature is active, the room temperature functions as an
additional temperature input.
In case of room temperature-dependent control and weather-
compensated control with influence of the room temperature
the control quality depends on the installation location.
• The installation location (= reference room) must be
suitable for controlling the heating system (Fig. 4,
page 9).
• If remote controls are used for all heating circuits e.g.
Sense I, the main controller can be installed in the heat
source.
When using thermostatic radiator valves in the reference room:
▶ Open the thermostatic radiator valves completely and set
the output of the radiators as low as possible using
adjustable return fittings.
In this way, the reference room will be heated identically as
the remaining rooms.
WARNING: Risk of scalding!
If DHW temperatures above 60 °C are set or
thermal disinfection is switched on, a mixer
must be installed.
DANGER: Risk of electric shock!
▶ Before installing this product:
Disconnect the heat source and all other
BUS controls and modules from the mains
voltage across all poles. Guard against
unintentional reconnection.
If there is no suitable reference room, we
recommend converting the system to weather-
compensated control instead.

9
Installation
Sense II – 6 720 818 367 (2015/10)
Fig. 4 Installation location in the reference room
6 720 812 361-08.1O
≥ 1000
≥ 1200
750
600

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Installation
Sense II – 6 720 818 367 (2015/10)
3.3 Installation in the reference room
Fig. 5 Installation of Wall mounting plate
3.4 Electrical connection
Power is supplied to the controller via 2 core electrical cable.
Existing electrical room thermostat cable is suitable.
Polarity is irrelevant for the two wires.
Maximum total length of cable to the BUS connections:
• 100 m at 0.50 mm2conductor cross-section
• 300 m at 1.50 mm2conductor cross-section.
▶ If several BUS devices are installed, maintain a minimum
clearance of 100 mm between the individual BUS devices.
▶ If several BUS devices are installed, connect the BUS
devices in series or in a star pattern.
▶ To avoid inductive interference: make sure all low-voltage
cables are routed separately from mains voltage cables
(min. clearance 100 mm).
▶ In the case of external inductive interferences (e.g. from
photovoltaic systems), use shielded cables (e.g. LIYCY)
and earth the shield on one side. The shield should be
connected to the building's earthing system, e.g. to a free
earth conductor terminal or water pipes, and not to the
grounded terminal in the module.
▶ Establish a BUS connection to the heat source. Depending
on the installed heat source the terminal reference may be
different.
Fig. 6 Connection of the controller to a heat source
The surface of the wall must be flat.
When installing on to a wall box:
▶ Fill the wall box with thermal insulation
material to prevent drafts affecting the
true room temperature.
▶ Install plate on a wall (Fig. 5).
Underno circumstancesmustthecontrollerbe
connected to the boiler’s 230 volt connections
or external 230 volt supply
6 720 815 238-19.1O
6 mm 3.5 mm6 mm
3.5 mm
If the maximum total length of the cable
between all BUS devices is exceeded or the
BUS system has a ring structure,
commissioning of the system is not possible.
6 720 815 238-20.1O
BUS
BUS/
EMS/BB

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Installation
Sense II – 6 720 818 367 (2015/10)
3.5 Fitting/Removing the controller
Fitting the controller
▶ Hook the controller in at the top.
▶ Click in the controller at the bottom.
Fig. 7 Fitting the controller
Removing the controller
▶ Press the button on the underside of the plate.
▶ Pull the bottom of the controller towards you.
▶ Remove the controller by lifting upwards.
Fig. 8 Removing the controller
3.6 Installation in the heat source
▶ To prepare the controllerfor installation in the heat source:
Fig. 9 Loosen the cover at the back of the controller
Fig. 10 Remove the controller from its back cover
6 720 812 774-11.1O
1. 1.
2.
6 720 812 774-13.1O
3.
2.
1.
6 720 812 774-14.1O
1.
2.
6 720 812 774-15.1O

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Installation
Sense II – 6 720 818 367 (2015/10)
Fig. 11 Mount installation frame to the back of the controller
▶ Observe the installation instructions of the relevant heat
source.
3.7 Installing the connector with link
The advanced weather compensated controller only works
properly, when the connector with link (fig 2, [4], page 6).
is installed correctly in the heat source.
The plug with jumper must be installed in all heat sources with
HT4i electronics (e.g. Greenstar Compact) (fig 12).
▶ Observe the installation instructions of the relevant heat
source.
Fig. 12 Low voltage connectors of a heat source
6 720 812 774-12.1O
Key to fig. 12
Low voltage room thermostat input (NOT USED)
EMS/EMS 2 BUS connection
External cut off switch (NOT USED) – plug in
connector with link (fig 2, [4], page 6) here
Outdoor temperature sensor
Cylinder sensor (NOT USED on Combi boilers)
Low loss header sensor (NOT USED)
Table 5 Low Voltage terminal strip
Failure to install the connector with link into
the required heat source will stop the CH from
coming on.
6 720 812 774-16.1O
EMSEMS
EMSEMS

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Installation
Sense II – 6 720 818 367 (2015/10)
3.8 Installing the blue connector
The weather-compensated controller only functions, if the
outside temperature sensor is correctly installed at the heat
source.
If no plug is enclosed with the heat source (e.g. Greenstar i),
the blue plug is to be installed (fig. 13).
▶ Observe the instructions for the heat sources concerned.
Fig. 13 Low-voltage connections for a heat source
Key to fig. 13
EMS/EMS 2 BUS connection
Room thermostat input with low voltage (NOT
USED)
External switching contact (NOT USED)
Outside temperature sensor
Temperature sensor for DHW cylinder (NOT USED
with combi boilers)
Flow temperature sensor on the low loss header
(NOT USED)
Table 6 Low-voltage terminal strip
6 720 812 774-17.1O
EMS
EMSEMS

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Installation
Sense II – 6 720 818 367 (2015/10)
3.9 Installation of an outside temperature sensor
If the controller is to be used as a weather-compensated
controller, the outside temperature sensor, supplied, is
required.
To correctly record the outside temperature:
▶ Observe the points represented in Fig. 14 when selecting
the correct installation location of the outside temperature
sensor.
The outside temperature sensor is connected to the heat
source.
▶ Observe the instructions for the heat source when
connecting the electrical supply.
When sensor leads are extended, apply the following cable
cross-sections:
• Up to 20 m with 0.75 mm2to 1.50 mm2conductor cross-
section
• 20 m up to 100 m with 1.50 mm2conductor cross-
section.
Fig. 14 Installation location for the outside temperature sensor (for weather-compensated control with or without room
temperature influence)
1
/
2 H
(min 2m)
H
1
/
2 Y
Y
1
/
2 H
(min 2m)
H
N
S
W E
NW NE
SW SE
6 720 812 360-07.1O

15
Basic principles of operation
Sense II – 6 720 818 367 (2015/10)
4 Basic principles of operation
4.1 Overview of the control elements
Fig. 15 Control elements
[1] adv key (bringing forward the next heating on time)
[2] man key (manual operation)
[3] auto key (automatic mode)
[4] menu key (to call up menus)
[5] info key (info menu and help)
[6] Back key
[7] Selector
6 720 812 773-03.1O
5
6
7
4
2
3
1
The first press of any Key or adjustment of the
Selector will only switch on the backlight of the
display. The keys/selector must therefore be
pressed/adjusted again to make a change.

16
Basic principles of operation
Sense II – 6 720 818 367 (2015/10)
Fig. 15, page 15
Item Element Designation Explanation
1Advance key If automatic mode with time program is active:
▶ Press to bring forward the next switching (heating on) time.
If automatic mode with time program is active and the next switching time has already
been brought forward:
▶ Press again to undo the change to the next switching time.
2Manual key ▶ Press to activate manual operation for a permanent room temperature set value.
▶ Hold down to select the duration of the manual operation (maximum 48 hours from
current time).
3auto key ▶ Press to activate the automatic mode with the time program.
4menu key ▶ Press to open the main menu.
▶ Hold to open the service menu.
5Info key If a menu is open:
▶ Press to call up more information about the current selection.
If the standard display is active:
▶ Press to open the info menu.
6Back key ▶ Press to return to the previous menu level or discard a changed value.
If a service or a fault is displayed:
▶ Press to switch between standard display and fault/service display.
▶ Hold to switch from a menu to the standard display (home screen).
7Selector ▶ Turn to change a setting's value (e. g. temperature) or select from among the menus
or menu items.
If the backlighting is turned off:
▶ Press to turn on the backlighting.
If the backlighting is turned on:
▶ Press to open a selected menu or menu item, confirm a set value (e. g. temperature)
or a message or to close a pop-up window.
If the standard display is active:
▶ Press to select the heating circuit in the standard display (systems with at least two
heating circuits only, operating instructions of the user interface).
Table 7 Control elements
adv
man
auto
menu
info

17
Basic principles of operation
Sense II – 6 720 818 367 (2015/10)
4.2 Overview of the symbols in the display
Fig. 16 Example for a standard display of a system with more than one heating circuit
Fig. 16, page 17
Item Symbol Designation Explanation
1Value display Display of current temperature:
• Room temperature for wall-mounted installation
• Heat source flow temperature for installation in heat source.
2– Information line Display of time of day, day of the week and date.
3Additional
temperature
display
Display of an additional temperature: outside temperature, temperature of the
solar collector or a DHW system (for further information operating instructions
of the controller).
4– Text information E.g. the designation of the temperature currently displayed (Fig. 16, [1]); a
designation for the room temperature is not displayed. If a fault is present,
corresponding information will be displayed here until the fault has been
rectified.
5Information
graphic
Solar circuit pump is in operation.
DHW heating is active
DHW heating is switched off
Burner is on (flame)
BExternal cut off switch is activated (NOT USED), or connector with link (supplied)
is not installed within the heat source (Fig. 12, page 12)
6Time &
temperature
program
Graphical display of the active time program for the heating circuit displayed. The
height of the bars represents roughly the desired room temperature in the
different time slots.
7Time marker The time marker indicates the current time of day in the time program in
15 minute increments.
Table 8 Symbols on the standard display
6
13
8
2
9
4
5
7

18
Basic principles of operation
Sense II – 6 720 818 367 (2015/10)
8 auto Mode Display with one heating circuit in automatic mode (heating controlled by time
program).
HC2auto The displayed heating circuit operates in automatic mode. The standard display
refers only to the displayed heating circuit. Pressing the man key, the auto key
and changing the required room temperature only affects the heating circuit
displayed.
Heating mode active in automatic mode in the displayed heating circuit.
Setback mode active in automatic mode in the displayed heating circuit.
Summer (off) System with one heating circuit in summer mode (heating off, DHW heating
active)
HC2 Summer
(off)
The displayed heating circuit operates in summer mode (heating off, DHW
heating active). The standard display refers only to the displayed heating circuit
(operating instructions of the controller).
manual System with one heating circuit in manual operation.
HC2manual The displayed heating circuit operates in manual operation. The standard display
refers only to the displayed heating circuit. Pressing the man key, the auto key
and changing the required room temperature only affects the heating circuit
displayed.
Holiday until 10/
6/2015
Holiday program active in system with one heating circuit (operating
instructions of the controller).
HC2Holidayuntil
10/6/2015
The holiday program is active in the displayed heating circuit and possibly for
DHW systems (operating instructions of the user interface). The standard
display refers only to the displayed heating circuit.
Heating is completely off (all heating circuits)
Emissions test mode is active (if the controller is installed in the heat source,
simultaneously press and hold the info and return keys for a longer time to
activate the emissions test mode).
Emergency operation is active
E External heat requirement
9Controller status A communication module is available in the system and a connection to the
Worcester server is active.
The key lock is active (hold down the auto key and the selector to activate or
deactivate the key lock).
Fig. 16, page 17
Item Symbol Designation Explanation
Table 8 Symbols on the standard display

19
Basic principles of operation
Sense II – 6 720 818 367 (2015/10)
4.3 Operating the service menu
Opening and closing the service menu
Navigating through the menu
Changing setting values
Confirming or rejecting the change
The first press of any Key or adjustment of the
Selector will only switch on the backlight of the
display. The keys/selector must therefore be
pressed/adjusted again to make a change.
Opening the service menu
▶ Hold the menu key until the service menu
is displayed.
Closing the service menu
▶ If no sub-menu is open, press the Back key
to switch to the standard display (home
screen).
-or-
▶ Press and hold the Back key for a few
seconds to switch to the standard display
(home screen).
Table 9
▶ Turn the selector to highlight a menu or a
menu item.
▶ Press the selector.
The menu or the menu item is displayed.
▶ Press the Back key to return to the
previous menu level.
Selection
▶ Turn the selector to highlight an entry and
set the setting value between minimum
and maximum.
Table 10
menu
&
Setting a value with a slider (slider shown in
display)
▶ Turn the selector to highlight an entry.
▶ Press the selector to confirm the
selection.
The input field and the slider are enabled.
▶ Turn the selector to move the slider
(change setting value) between minimum
and maximum, e. g. for DHW temperature.
Multiple selection
▶ Turn the selector to highlight an entry.
▶ Press the selector to select the entry.
▶ Press the selector again to cancel the
selection.
▶ Repeat the action steps until the desired
entries are selected.
Time program
▶ Turn the selector to highlight a switching
time or the corresponding operating
mode.
▶ Press the selector to activate the input
field for the switching time or the
operating mode.
▶ Turn the selector to change the setting
value.
Rejecting the change
&
▶Press the selector to activate the
marked entry or to confirm the change.
▶Turn the selector to highlight Continue
and press the selector.
The Display switches to the higher menu
level. The user interface operates with the
modified setting.
Rejecting the change
▶Press the Back key to undo the change.
Table 11
Table 10

20
Basic principles of operation
Sense II – 6 720 818 367 (2015/10)
4.4 Overview of the service menu
Menu Purpose of the menu page
Commissioning Check and, if necessary, adjust Start configuration wizard and the most important
settings for the heating system configuration.
21
Central
heating
settings1)
1) Limited use depending on the heat source used.
System data The settings that apply to the entire heating system, e.g. minimum outside
temperature and building type. Additional settings for heating circuit 1 and DHW
system are available in this menu (if directly installed in the heat source).
30
Boiler data2)
2) Not available if cascade module (e.g. MC 400) is installed.
Product-specific settings for the installed heat source, e.g. pump characteristic map
or pump over-run time.
31
Heating circuit
1– 4
Heating circuit-specific settings of the installed heating circuits 1 to 4, e.g. frost
protection and heating curve.
33
Screed drying Configurable program for screed drying with underfloor heating system. 40
DHW
settings1)
DHW system
Ior II
Separate settings options for two DHW systems, e.g. maximum DHW temperature,
time for the thermal disinfection and configuration of the DHW circulation and charge
(loading) pumps.
42
Solar settings If a solar system is installed: see technical documentation for solar modules. 44
Hybrid settings If a hybrid module is installed: see technical documentation for hybrid system. 45
Cascade settings If a cascade module is installed for the control of several heat sources: see technical
documentation for cascade module (MC 400).
45
Diagnosis1) System diagnosis:
• Perform function test of individual components (e.g. pumps and valves).
• Compare set and actual values.
• Call up current faults and the fault history.
• Call up the software versions of all BUS devices.
Additional functions:
• Define maintenance intervals.
• Enter installer contact details.
• Reset different settings.
• Calibrate room temperature sensor and clock.
45
Table 12 Overview of the service menu