Bosch CRC200 User manual

User manual
CRC200
6 720 811 153-00.1O
Comfort Room Controller
6 720 821 652 (2017/05)

6 720 821 652 (2017/05) CRC200
2 | Contents
Contents
1 Explanation of symbols and safety instructions . . . . 2
1.1 Guideline to symbols . . . . . . . . . . . . . . . . . . . . . . . . 2
1.2 Safety instructions . . . . . . . . . . . . . . . . . . . . . . . . . 3
2 Product Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
2.1 Notes on functional scope . . . . . . . . . . . . . . . . . . . 4
2.2 Function as controller . . . . . . . . . . . . . . . . . . . . . . . 4
2.3 Certificates . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
2.4 Applicability of the technical documentation . . . . 4
2.5 Operation after a power failure . . . . . . . . . . . . . . . 4
3 Overview of controls and symbols . . . . . . . . . . . . . . . . 5
4 Getting started . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
4.1 Changing the room temperature . . . . . . . . . . . . . . 7
4.2 More settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
5 Working with the MENU . . . . . . . . . . . . . . . . . . . . . . . . 10
5.1 Menu structure . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
5.2 Overview of main menu . . . . . . . . . . . . . . . . . . . . 11
5.3 Adapting the settings for Heating with the time
program (automatic mode) . . . . . . . . . . . . . . . . . 12
5.4 Changing the settings for water heating . . . . . . . 15
5.5 Setting up a vacation program . . . . . . . . . . . . . . . 16
5.6 Displaying information about the system . . . . . . 18
5.7 General settings . . . . . . . . . . . . . . . . . . . . . . . . . . 19
6 Energy-saving tips . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
7 FAQ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
8 Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
8.1 Eliminating “sensed” faults . . . . . . . . . . . . . . . . . . 21
8.2 Eliminating displayed faults . . . . . . . . . . . . . . . . . 22
9 Environmental protection/disposal . . . . . . . . . . . . . . 23
10 Setup log . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Technical terms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
1 Explanation of symbols and safety
instructions
1.1 Guideline to symbols
Warnings
The following keywords are defined and can be used in this
document:
•DANGER indicates a hazardous situation which, if not
avoided, will result in death or serious injury.
•WARNING indicates a hazardous situation which, if not
avoided, could result in death or serious injury.
•CAUTION indicates a hazardous situation which, if not
avoided, could result in minor to moderate injury.
•NOTICE is used to address practices not related to
personal injury.
Important information
Additional symbols
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 Function
▶ Sequence of steps
Cross-reference to other points in this
document or to other documents
• Listing/list entry
– Listing/list entry (2ndlevel)
Outdoor temperature dependent
function
Flashing indication display (e. g. flashing
ON)
Table 1 Additional symbols
6 720 811 158-11.2O
Tank loading
Tank loading

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Explanation of symbols and safety instructions | 3
1.2 Safety instructions
These operating instructions are
intended for the heating system user.
▶ Read and retain the operating
instructions (heat source, modules
etc.) prior to operation.
▶ Observe safety instructions and
warnings.
Designated use
▶ Use the product only to control
heating systems in residential houses
or apartments.
Any other use is considered improper.
Any resulting damage is excluded from
the manufacturer's warranty.
Inspection and maintenance
Regular inspection and maintenance are
prerequisites for safe and
environmentally compatible operation
of the heating system.
We recommend that you enter into a
contract for the annual inspection and
demand-dependent maintenance with
an authorized contractor.
▶ Have work carried out only by an
authorized contractor.
▶ If any faults are discovered, have
them remedied immediately.
Risk of damage from frost
The system can freeze if it is switched
off:
▶ Observe the instructions for frost
protection.
▶ Always leave the system switched on
for additional functions, e. g. water
heating or anti-seize protection.
▶ Have faults rectified immediately.
Risk of scalding at the hot water draw-
off point
▶ If hot water temperatures above
60 °C are set or if thermal disinfection
is activated, a mixer must be
installed. If in doubt, ask your
contractor.

6 720 821 652 (2017/05) CRC200
4 | Product Description
2 Product Description
The user interface CRC200 permits simple operation of the
heating system. The desired room temperature can be set in
the room by turning the dial. Automatic operation with the
adjustable time program assures energy-saving operation by
reducing the room temperature at specified times or shutting
off the heating entirely. This method of controlling the heating
optimizes thermal comfort while minimizing energy
consumption. DHW heating can be adjusted conveniently and
controlled efficiently.
2.1 Notes on functional scope
The functional scope and thus the menu structure of the user
interface are determined by the structure of the system. Your
attention is drawn to the importance of the system structure at
the relevant places in these instructions. The control ranges
and factory settings may differ from the information in these
instructions, depending on the system installed at the site.
Consult your contractor if you have further questions.
2.2 Function as controller
Water heating settings for the storage tank and thermal
disinfection are made in the first heating zone on the CRC200.
The CRC200 can function in one of the three different main
control modes. Depending on your requirements, your
contractor will select and set up one of these modes.
The main control modes are:
•Room temperature-dependent: Automated control of the
heating based on the room temperature.
•Weather-compensated ( ): Automated control of the
heating based on the outside temperature.
•Weather-compensated with the influence of the room
temperature ( ): Automated control of the heating
based on the outside temperature and room temperature.
2.3 Certificates
This product has been tested and is certified for both the US
and Canadian markets, and meets all applicable US and
Canadian standards.
2.4 Applicability of the technical documentation
All information related to BUS systems and heating controllers
contained in the technical documentation of e.g. heat sources
applies also to the present user interface.
2.5 Operation after a power failure
No settings are lost in the event of a brief power failure or if the
heat source is shut down for short periods of time (min. four
hours power reserve after 1½ hour of operation). When the
power supply is restored, the user interface resumes
operation. If the shutdown period is prolonged, the settings for
the time of day and the date might have to be made again. No
other settings are required.
Functions that are relevant only in conjunction
with the outdoor temperature are identified by
a corresponding symbol ( ).

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Overview of controls and symbols | 5
3 Overview of controls and symbols
Fig. 1 Controls
Item Element Designation Explanation
1dial ▶ Turn to change a setting or select a menu/menu item.
▶ Press to open a menu/menu item or confirm a setting/message.
2 auto button ▶ Press to activate the automatic mode.
3 man button ▶ Press to activate the hold mode (manual operation)
4Back button ▶ Press to return to the higher menu level or discard a setting.
▶ Press for an extended period of time to close the main menu.
5 menu button ▶ Press to open the main menu.
Table 2 Controls
6 720 809 984-40.1O
2
3
5
4
1
auto
man
menu

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6 | Overview of controls and symbols
Fig. 2 Symbols on the display (sample figures)
Item Symbol Designation Explanation
1Value display Display of the current room temperature and input field for the desired room
temperature
Display of information values and input field for setting values
2 pm/am Time of day Afternoon/morning with 12-hour format (factory setting 12-hour format)
3– Text line Time of day (e. g. 02:03pm) and current day of the week (e. g. Mo)
Display of menu items, settings, info texts etc. Additional texts are identified by
direction arrows and displayed by turning the dial.
4Operating mode Automatic Mode Active (according to time program)
Hold Mode Active (manual operation)
Heating Circuit Active
Setback Mode Active
5Segment display Solid segments: time set for operating mode today (1 segment = 30 min)
No segments: time set for setback mode today (1 segment = 30 min)
6Operating state Burner operational
7Menu Heating Menu with settings for the heating system
Menu DHW Menu with settings for water heating
Menu Holiday Menu with settings for vacation program
Menu Info Menu to display current information about the heating system, e. g. heating, hot water
Menu Settings Menu with general settings, e. g. language, time/date, formats
8– Units line Physical units for the displayed values, e. g. in the “Information” menu. The following
units can be shown: ( )
Table 3 Symbols on the display
Recirculation
Recirculation
6 720 811 158-02.2O
12:31
12:31
Tu
Tu
man
man
auto
auto
1
6
42 3
5 8
7
1
3

6 720 821 652 (2017/05)CRC200
Getting started | 7
4 Getting started
An overview of the structure of the main menu and the position
of the individual menu items can be found on page 11.
Each of the following descriptions takes the standard display as
its starting point (page 6, Fig. 2 at left).
4.1 Changing the room temperature
Operation Result
To check the current required room temperature.
Auto mode
If the automatic mode is active ( displayed):
▶ Press the auto key.
The desired room temperature then appears on the display for a few seconds. How
long the current setting applies (time to next switching time) appears next for a few
seconds.
Manual operation
If the hold mode is active ( displayed):
▶ Press the man key.
The desired room temperature then appears on the display for a few seconds. An
indication that the current setting is being held (unlimited time) then appears on the
display for a few seconds.
If it is too cold or too warm for you today: Change the room temperature temporarily
Auto mode
▶ Turn the dial in order to set the desired room temperature.
▶ Press the dial (or wait a few seconds).
The setting value stops flashing. The user interface operates with the modified
settings.
The change applies until the next switching time in the active time program is reached
(Chapter 5.3, Page 12). The temperature stored in the automatic mode then
becomes active again.
Should it be permanently too cold or too hot for you:
Change the required room temperature for the Heating or Setback mode
Auto mode
▶ Press the menu key to open the main menu.
▶ If necessary, turn the dial to highlight the Heating menu.
▶ Press the dial to open the Heating menu.
Notice: Continued on page 8.
Table 4 Getting started – Room temperature
6 720 811 158-03.1O
Set Room Temp
Set Room Temp
6 720 811 158-04.2O
Hold
Hold
6 720 811 158-05.1O
to 11:00 pm
to 11:00 pm
6 720 811 158-06.1O
Temperatures
Temperatures

6 720 821 652 (2017/05) CRC200
8 | Getting started
Auto mode
Notice: Continued from page 7.
▶ Press the dial to open the Temperatures menu.
▶ Turn the dial to select the menu item Heating or Setback and press the dial.
The current setting appears and flashes.
▶ Turn the dial to set the desired room temperature for the selected operating mode and
press the dial.
The setting value stops flashing. The user interface operates with the modified
settings.
If you require a room temperature for a period of time which deviates from the temperatures set for heating or setback: Activate
manual operation and set the required room temperature
Manual operation
▶ Press the man key.
The user interface will now constantly maintain the set temperature entered for
manual operation.
▶ Wait a few seconds until the default display appears again or press the dial twice.
▶ Turn the dial to set the desired room temperature and press the dial (or wait a
few seconds).
The setting value stops flashing. The user interface operates permanently and for an
unlimited period of time with the modified setting (without setback).
If you are too cold or too warm during the transition time (Spring and Fall), adapt the: temperature threshold for summer shut-
off ()
Auto mode and manual operation
▶ Press the menu key to open the main menu.
▶ Turn the selector to highlight the Heating menu.
▶ Press the selector to open the Heating menu.
▶ Turn the selector to select the Summer/Winter menu item, and press the selector.
The current setting appears and flashes.
▶ If desired, turn the dial to set by Outdoor Temp, and press the selector.
▶ Turn the dial to select the menu item Temp.thresh. and press the selector.
The current setting appears and flashes.
▶ Turn the selector to set the outdoor temperature for automatically turning on or off the
heating, and press the selector occurred.
The setting value stops flashing. The user interface operates with the modified
settings.
Operation Result
Table 4 Getting started – Room temperature
6 720 811 158-07.1O
Setback
Setback
6 720 811 158-08.1O
Set Room Temp
Set Room Temp
6 720 811 158-36.1O
Summer/Winter
Summer/Winter
6 720 811 158-10.1O
Temp.thresh.
Temp.thresh.

6 720 821 652 (2017/05)CRC200
Getting started | 9
4.2 More settings
Operation Result
If you need hot water outside of the times set in the time program:
Activate immediate tank charging (immediate hot water function)
▶ Press the menu key to open the main menu.
▶ Turn the dial to highlight the DHW menu.
▶ Press the dial to open the selected menu.
▶ Press the dial.
The current setting appears and flashes.
▶ Turn the dial to set ON and press the dial.
Water heating (tank heating or instantaneous flow heating) becomes active immediately.
After heat-up, immediate tank charging switches off again.
Setting the time and date
▶ Press the menu key to open the main menu.
▶ Turn the dial to highlight the Settings menu.
▶ Press the dial to open the selected menu.
▶ Turn the dial to select the Time/Date menu and press the dial.
The menu item Time of Day is displayed.
▶ Press the dial.
The input field for the hour setting starts to flash.
▶ Turn the dial to set the hour and press the dial.
The input field for the minute setting starts to flash.
▶ Turn the dial to set the minutes and press the dial.
▶ Turn the dial to select the menu item Date and press the dial.
The first input field for the date starts to flash in the text line (observe the setting in the
Settings > Format > Date format menu).
▶ Set the month, day and year in the same way as the hours and minutes.
▶ Press the dial.
The setting value stops flashing. The user interface operates with the modified settings.
To prevent the user interface settings from being modified inadvertently:
Activate key block
▶ Press and hold the dial and auto key simultaneously for a few seconds until Key Lock
appears in the text line.
▶ If a control element is actuated while key block is active, Key Lock appears in the text line.
Canceling key block:
▶ Press and hold the dial and auto key simultaneously for a few seconds until Key Lock no
longer appears in the text line.
To change the language of the display texts: Set language
Table 5 Getting started – More settings
6 720 811 158-11.2O
Tank loading
Tank loading
6 720 811 158-14.1O
Time of Day
Time of Day
6 720 811 158-15.1O
Time of Day
Time of Day
6 720 811 154-16.1O
07/20/2014
07/20/2014
6 720 811 158-17.1O
Key Lock
Key Lock

6 720 821 652 (2017/05) CRC200
10 | Working with the MENU
5 Working with the MENU
▶ Press the menu key to open the main menu.
▶ Turn the dial to highlight the Settings menu.
▶ Press the dial to open the selected menu.
▶ Press the dial.
The currently set language flashes in the text line and appears in abbreviated form in the
value display.
▶ Turn the dial until the desired language appears and press the dial.
The selected language is active immediately.
If your day/night pattern changes (e. g if you work shifts): Adapt the time program
Enter setting in the Heating > Time program menu (Table 10, Page 13).
Operation Result
Table 5 Getting started – More settings
6 720 811 158-18.1O
english
english
6 720 811 158-21.1O
Heat begin1
Heat begin1
Opening the menu
▶ Press the menu key to open the main menu.
▶ Turn the dial to highlight the the desired menu, e. g.
Settings.
▶ Press the dial to open the selected menu.
▶ Turn the dial to select a submenu, e. g. Settings >
Format.
▶ Press the dial to open the selected menu.
Changing the setting
▶ Turn the dial in order to select the desired menu item, e. g.
Format > Contrast.
▶ Press the dial.
The current setting appears and flashes.
▶ Turn the dial to set a value.
▶ Press the dial.
The setting value stops flashing. The user interface
operates with the modified settings.
Closing the menu
▶ Press the Back key to return to the next higher menu.
-or-
▶ Press and hold the Back key for a longer period of time to
close the main menu and return to the room temperature
display immediately.
Table 6 Working with the main menu

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Working with the MENU | 11
5.1 Menu structure
Fig. 3 Main menu summary
1) Set language.
2) Available only on the user interface for heating zone 1.
3) Settings in the service menu may only be changed by a
contractor (hidden by default).
5.2 Overview of main menu
Main Menu
Heating Holiday Settings
Temperatures Holiday Prog. deutsch 1)
Heating Info Time/Date
Setback Heating Time of Day
Time program Outdoor Temp. Date
Reset Sched. Operat. stats Time correc.
Summer/Winter Room Temp. Format
Temp.thresh. DHW Date format
DHW Operat. stats Time Format
Tank loading Set temp. Temp. Format
Mode Actual Temp. Sensor calib.
Recirculation 2) Contrast
Disinfection 2) Service 3)
6 720 821 651-17.1O
Menu Purpose of the menu Page
Heating Change the room temperatures
and time program for the heating
system permanently.
12
DHW Change the hot water
temperature and settings for the
hot water system.
15
Holiday Settings for operating the
system during prolonged
periods of absence (vacation
program).
16
Info Display the current
temperatures and operating
status of the system.
18
Settings Change the general settings,
e. g. language, time or date.
19
Table 7

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12 | Working with the MENU
5.3 Adapting the settings for Heating with the time program (automatic mode)
Heating menu
Normally, the time program provides the best heating comfort.
If the temperatures or the time program do not meet your
needs, you can adapt the settings.
Setting the temperatures for the operating modes in the
automatic mode
A detailed description of how to change the temperatures can
be found in Chapter 4.2, Page 9.
Menu Heating > Temperatures
Adapting the start of heating and start of setback in the
Time program
Six switching times are available under each menu item in the
Time program menu (day of week or group of days). Using
these switching times, three heating phases per day can be
established. Heat begin1 represents the first switching time
for the heating mode and defines when the first heating phase
starts. Strt setback1 represents the first switching time for the
setback mode and defines when the first heating phase ends.
To set the same switching times for several days of the week,
set the switching times under Mo-Fr first. Then adapt the time
program for the individual days of the week that differ and for
Saturday and Sunday.
A detailed description of how to modify the time program can
be found in Table 10, Page 13.
Menu Heating > Time program
Menu item Description
Heating Desired room temperature for the heating
mode; if automatic mode is active, the time
program will switch to this temperature at the
start of every heating phase (42 °F ... 86 °F /
5.5 °C ... 30.0 °C). Thistemperaturecannotbe
set lower than the temperature for the setback
mode + 1 °F (+ 0.5 °C).
Setback Desired room temperature for the setback
mode; if automatic mode is active, the time
program will switch to this temperature at the
start of every setback phase (41 °F ... 85 °F /
5.0 °C ... 29.5 °C) or OFF. This temperature
cannot be set lower than the temperature for
the heating mode – 1 °F ( – 0.5 °C).
Table 8 Temperature settings in the heating menu
The switching times in the time program can be
set in 15-minute increments. In the segment
display, each segment corresponds to one
half-hour. As a result, a discrepancy of
15 minutes may occur in the segment display
of the time program. This discrepancy has no
effect on the time program.
Menu item Description
Mon-Fri It is possible to set 6 switching times for each
day (3 switching times for heat begin and
3 switching times for setback begin). The
minimum duration of a heating phase is
30 minutes.
The default settings are:
•Mon-Fri: Heat begin1: 06:00am to Strt
setback1: 11:00pm
• and Sunday: Heat begin1: 08:00am to
Strt setback1: 11:00pm
This means that you are heating from 11:00pm
in the evening until 06:00am on the following
day to the setback temperature only (Saturday
and Sunday until 08:00am).
Saturday
Sunday
Monday
Tuesday
Wednesday
Thursday
Friday
Table 9 Time program settings in the heating menu

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Working with the MENU | 13
The following table shows how to activate or modify the time program.
Operation Result
Activate automatic mode with time program
If manual operation is active ( displayed):
▶ Press the auto key.
The user interface controls the room temperature in the automatic mode on the basis of the
time program.
Open time program for several days for one individual weekday
▶ Press the menu key to open the main menu.
The Heating menu is highlighted.
▶ Press the dial to open the selected menu.
▶ Turn the dial to select the Time program menu and press the dial.
The Time program menu is open, the Mon-Fri menu item is displayed.
▶ Turn the dial to select Mon-Fri (change switching times for all weekdays together) or
Saturday ... Friday (change switching times for individual weekdays).
▶ Press the dial.
The selected menu item is open, Heat begin1 is displayed.
Set heat begin or setback begin earlier or later (move switching time)
▶ Open time program for all weekdays or one individual weekday.
▶ Select the switching time and press the dial.
The hour currently set for the switching time and the associated segment in the segment
display start to flash.
▶ Turn the dial to move the switching time.
The setting in the value display changes in 15-minute increments and in the segment
display in 30-minute increments.
▶ Press the dial.
The user interface operates with the modified setting.
Add a new heating phase (e. g. Heat begin2 to Strt setback2)
If all six switching times in the time program are not being used, a new heating phase can be
added.
▶ Open time program for all weekdays or one individual weekday.
▶ Turn the dial to select Heat begin2 and press the dial.
The new switching time is added. The hour and associated segment in the segment display
start to flash.
Table 10 Activating and modifying the time program
6 720 811 158-19.1O
12:41 We
12:41 We
6 720 811 158-20.1O
Mon-Fri
Mon-Fri
6 720 811 158-21.1O
Heat begin1
Heat begin1
6 720 811 158-22.1O
Strt setback1
Strt setback1
6 720 811 158-23.1O
Heat begin2
Heat begin2

6 720 821 652 (2017/05) CRC200
14 | Working with the MENU
▶ Turn the dial to set Heat begin2, e. g. to 02:00pm and press the dial.
The new heating phase is added with a duration of one half-hour. Strt setback2 is set to
02:30pm. If necessary, move Strt setback2 to later, e. g. to 11:00pm. The user interface
operates with the modified settings.
Interrupt heating phase with setback phase (e. g. add setback phase between Heat begin2 and Strt setback2)
▶ Open time program for all weekdays or one individual weekday.
▶ Turn the dial to select Strt setback2 (end of the heating phase being interrupted).
▶ Set Strt setback2 to the start of the interruption, e. g. 06:00pm.
▶ Add a new heating phase and set heat begin and setback begin, e. g. Heat begin3
(09:00pm) to Strt setback3 (11:00pm).
The user interface automatically sorts the heating phases chronologically. The user
interface operates with the modified settings.
Delete a heating phase (e. g. Heat begin2 to Strt setback2)
▶ Open time program for all weekdays or one individual weekday.
▶ Turn the dial to select Strt setback2 and press the dial.
The hour currently set for the switching time and the associated segment in the segment
display start to flash.
▶ Turn the dial to set Strt setback2 to the same hour as Heat begin2.
Delete? appears in the text line
▶ Press the dial.
The heating phase is deleted. The user interface operates with the modified settings.
Delete a setback phase (e. g. Strt setback1 to Heat begin2)
▶ Open time program for all weekdays or one individual weekday.
▶ Delete the heating phase before Strt setback1 (or after Heat begin2).
The user interface automatically sorts the heating phases chronologically.
▶ Set Heat begin1 to earlier (or Strt setback1 to later).
The setback phase is deleted. The user interface operates with the modified settings.
Operation Result
Table 10 Activating and modifying the time program
6 720 811 158-24.1O
Strt setback2
Strt setback2
6 720 811 158-25.1O
Strt setback3
Strt setback3
6 720 811 158-26.1O
Delete?
Delete?
6 720 811 158-27.1O
Heat begin1
Heat begin1

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Working with the MENU | 15
Resetting the time program to the factory settings
Menu Heating > Reset Sched.
Summer switch-off (only available with weather-
compensated control)
A detailed description on how to set the summer switch-off
( ) can be found in chapter 4.1 on page 7.
Menu Heating > Summer/Winter ()
5.4 Changing the settings for water heating
Operating modes for water heating
The following statements refer to a request for hot water from
this CRC200. Water heating or temperature maintenance
remains active even if a request comes from a different
CRC200. The operating modes for hot water can be used
independently of the active operating mode for heating.
• The automatic mode for water heating is active when AUTO
appears in the value display under the menu item Mode.
There is no separate time program for water heating. The
time program for heating also specifies the switching times
for water heating. Water heating is active for a half an hour
before, during and after each heating phase (all heating
circuits). The time program for water heating is also in
effect during manual operation of the heating system.
• Continuous water heating or temperature maintenance is
active when Mode appears in the value display under the
menu item ON.
• There is no water heating or temperature maintenance
when Mode appears in the value display under the menu
item OFF.
A detailed description of how immediate tank charging is
activated and how the hot water temperature is set can be
found in Chapter 4.2, Page 9. Proceed as described in Table 6
on page 10 to change the other settings.
Menu item Description
Reset
Sched.
With the aid of the YES setting, an individual
time program can be reset to the factory
settings. All other settings are retained.
Table 11
Menu item Description
Summer/
Winter ()
If Never Heat is enabled, the heating is
turned off (for example in summer).
If Always Heat is enabled, the heating
remains active. However, the heating
appliance only starts operating if it is too cold
inside.
If by Outdoor Temp is activated, the heating
is turned on and off depending on the set
lower Temp.thresh..
Temp.thresh.
()
When the outside temperature exceeds the
temperature threshold (10,0 °C ... 30,0 °C)
set here, the heating system is switched off. If
the adjusted outside temperature falls below
the temperature threshold set here by
1 K ( °C), the heating system is switched on.
This menu item is only available when
Summer/Winter is set to by by Outdoor
Temp.
Table 12
CAUTION: Health hazard due to legionella!
▶ At lower hot water temperatures, activate
thermal Disinfection.
WARNING: Risk of scalding!
If thermal disinfection is activated to prevent
legionella, the hot water is heated once to
158 °F (70 °C) (Tuesday night at 02:00am).
The hot water temperature is set at the factory
to 140 °F (60 °C). There is a risk of scalding at
the taps if the temperature is set higher than
this.
▶ Make sure that a mixer is installed. If in
doubt, ask your contractor.

6 720 821 652 (2017/05) CRC200
16 | Working with the MENU
Hot water menu 5.5 Setting up a vacation program
To save energy, we
recommend that you use the
vacation program during a
prolonged period of
absence.
The vacation program is
activated automatically at
the previously set vacation
start date. While the the vacation program is running, the text
line displays Holiday. The current room temperature appears
in the value display.
The factory settings guarantee energy-saving and safe
operation during your vacation. The room temperature used for
heating between the vacation start and vacation end dates
correspondstothe setback temperature in the automatic mode
(see Changing the setting Chapter 4.2, page 9).
If the CRC200 is used as the controller, water heating or
temperature maintenance is off while the vacation program is
active.
After the end of the vacation program, the user interface
operates again with the set time program (heating and setback
phases).
Vacation menu
Menu item Description
Tank loading If immediate tank charging is activated
(ON), water heating or temperature
maintenance is active immediately.
Mode Operating modes for water heating,
Page 15.
Recirculation Recirculation makes hot water available
immediately at the hot water taps.
• If ON is set, hot water is pumped
through the recirculation line briefly
once or several times per hour.
• If AUTO is set, hot water is pumped
through the recirculation line briefly
once or several times per hour at the
times water heating or keeping water
hot is active.
• Set OFF to save as much energy as
possible.
Disinfection1)
1) Can be set only for HC1 on the CRC200 controller, not for
HC2...8.
Thermal disinfection safeguards the
hygienic quality of the hot water. If AUTO
is set, the hot water is heated to 158 °F
(70 °C) once every Tuesday starting at
2:00am (at night).
Table 13
NOTICE: System damage!
▶ After a prolonged period of absence,
check the operating pressure of the
heating system at the pressure gauge.
Menu item Functional description
Holiday
Prog.
If the setting value is set to ON, the heating
system automatically operates energy
efficiently from the vacation begin to the
vacation end date (Tab. 15).
Table 14
6 720 811 158-28.1O
Holiday
Holiday

6 720 821 652 (2017/05)CRC200
Working with the MENU | 17
The following table shows how to activate, set, interrupt or prematurely end the vacation program.
Operation Result
Open the vacation menu
▶ Press the menu key to open the main menu.
▶ Turn the dial to highlight the Holiday menu.
▶ Press the dial to open the selected menu.
The menu item Holiday Prog. is displayed.
Activate the vacation program and set the vacation time
▶ Open the Holiday menu.
▶ Press the dial.
The setting value OFF starts to flash in the input field.
▶ Turn the dial to select ON and press the dial.
The text line displays the vacation begin date (factory setting for 1st vacation day = current
date) and the vacation end date (factory setting for last day = one week after the current
date). The input field for the day vacation begins starts to flash.
▶ Turn the dial to set the month vacation begins and press the dial.
The month that vacation begins is changed; the input field for the day vacation begins starts
the flash.
▶ Turn the dial to set the day vacation begins and press the dial.1)
The day that vacation begins is changed; the input field for the month vacation ends starts
to flash.
▶ Turn the dial to set the month vacation ends and press the dial.
The month that vacation ends is changed; the input field for the day vacation ends starts to
flash.
▶ Turn the dial to set the day vacation ends and press the dial.2)
The user interface operates with the modified settings. The vacation program is activated
automatically on set vacation begin date. The vacation period for the example shown runs
from 12:00am on 08/06/ to 12:00am on 08/22/.
Canceling vacation program
▶ Press the man key.
The user interface will now constantly maintain the set temperature entered for manual
operation. Hot water is available only if immediate tank charging is active or the hot water
operating mode is ON.
▶ If necessary, turn the dial to set the desired room temperature and press the dial (or wait a
few seconds).
The user interface will now constantly maintain the new set room temperature.
▶ Press the auto key to resume the vacation program.
Table 15 Activating, setting, interrupting or prematurely ending the vacation program
6 720 811 158-29.1O
Holiday prog.
Holiday prog.
6 720 811 158-30.1O
07/20/ - 07/27/
07/20/ - 07/27/
6 720 811 158-31.1O
08/06/ - 07/27/
08/06/ - 07/27/
6 720 811 158-32.1O
08/06/ - 08/21/
08/06/ - 08/21/
6 720 811 158-33.1O
12:55 We
12:55 We

6 720 821 652 (2017/05) CRC200
18 | Working with the MENU
5.6 Displaying information about the system
Info menu
The current system values and the active operating status can
be displayed easily via the Info menu. No changes can be made
here.
Menu Info > Heating
Menu Info > DHW
Canceling the vacation program early
▶ Open the Holiday menu.
▶ Press the dial.
The setting value ON starts to flash in the input field.
▶ Turn the dial to select OFF and press the dial.
The vacation program is ended prematurely. The setting values for the vacation begin and
vacation end dates are deleted.
1) If the vacation begin date precedes the current date, the year vacation begins is the coming year.
2) If the vacation end date precedes the vacation begin date, the year vacation ends is the year following the year vacation begins.
Operation Result
Table 15 Activating, setting, interrupting or prematurely ending the vacation program
6 720 811 158-34.1O
Holiday prog.
Holiday prog.
The DHW menu is displayed only if the user
interface is installed and set up appropriately
in a system with water heating.
Opening the menu
▶ Press the menu key to open the main menu.
▶ Turn the dial to highlight the Info menu.
▶ Press the dial to open the info menu.
▶ Turn the dial to select a submenu, e. g. DHW.
▶ Press the dial to open the selected menu.
Display information
▶ Turn the dial to select a menu item, e. g. Actual Temp.
(= current hot water temperature)
If no information appears in the value display:
▶ Press the dial.
The information for the selected menu item appears.
▶ Press the Back key to return to the menu item.
Closing the menu
▶ Press the Back key to return to the next higher menu.
▶ Press the Back key for an extended period of time to close
the main menu.
Table 16 Operating the info menu
Menu item Description (possible displays)
Outdoor
Temp. ()
The currently measured outdoor temperature,
e . g. – 23 °F ( – 5.0 °C). This menu item is
displayed only if an outdoor temperature
sensor is installed.
Operat.
stats
The heating system can have four different
operating conditions. The current status of
each heating zone assigned is displayed:
• If OFF is displayed, the heating is off, but
frost protection remains active.
• If Heating or Setback is displayed, the
heating system is operating in automatic
mode. Based on the time program, the
system heats to the temperature set for the
particular operating mode.
• If Manual is displayed, the heating system
operates in the manual mode.
Room
Temp.
The currently measured room temperature,
e. g. 72 °F (22.0 °C).
Table 17
Menu item Description (possible displays)
Operat.
stats
Display of the current operating status of water
heating: ON or OFF
Set temp. Desired hot water temperature, e . g. 122 °F
(50.0 °C).
Actual
Temp.
The currently measured hot water
temperature, e. g. 117 °F (47.0 °C).
Table 18

6 720 821 652 (2017/05)CRC200
Working with the MENU | 19
5.7 General settings
Settings menu
All relevant settings for the end customer are combined under
the general settings. This starts with language selection,
continues through all time settings and format selections and
ends with sensor calibration and display contrast.
Changing the language
A detailed description of how to change the language can be
found in Table 5, Page 9.
Settings > “Language”1) menu
Setting the time and date
A detailed description of how to set the time and date can be
found in Table 5, Page 9. Proceed as described in Table 6 on
page 10 to change the other settings.
No settings are lost in the event of a brief power failure or if the
heat source is shut down for short periods of time. When the
power supply is restored, the user interface resumes
operation. If the shutdown period is prolonged, the settings for
the time of day and the date might have to be made again. No
other settings are required.
Menu Settings > Time/Date
Setting the time correction correctly
Example of calculating the time correction value, with a time of
day deviation of approx. – 6 minutes per year (the clock in the
user interface is 6 minutes slow):
• – 6 minutes per year = – 360 seconds per year
• 1 year = 52 weeks
• – 360 seconds : 52 weeks = – 6.92 seconds per week
• Increase the value of the time correction by 7 s/week.
Setting output formats and properties of the user interface
Proceed as described in Table 6 on page 10 to change the
settings in the Format menu.
Menu Settings > Format
Calibrating the room temperature sensor (Sensor calib.)
▶ Place a suitable thermometer close to the user interface so
that they are both subject to the same heat influences.
▶ Keep heat sources such as direct sunlight and body heat,
etc., away from the user interface and the thermometer for
one hour.
▶ Open the Sensor calib. menu.
▶ Turn the dial to set the correction value for the room
temperature. For example, if the thermometer is showing a
temperature 1.2 °F (0.7 °C) higher than the user interface,
increase the setting value under Sensor calib. by
1.2 °F (0.7 K).
▶ Press the dial.
The user interface operates with the modified settings.
Menu item Functional description
Language1)
1) The set language appears on the display instead of the text
“Language”.
The language used for menus and menu items
can be changed.
Table 19
Menu item Functional description
Time of Day Set the current time.
Date Set the current date.
Time
correc.
Time correction of the internal clock of the user
interfaceinseconds per week ( – 20 s/week ...
20 s/week). Only the unit s (seconds) appears
on the display instead of s/week (seconds per
week) (“Setting the time correction
correctly”).
Table 20
Menu item Functional description
Date format Display of the date in all menus (DD.MM.YYYY
or MM/DD/YYYY), where: D = day,
M = month, Y = year. If indication of the year is
not needed (e. g. in the vacation program),
only DD.MM. or MM/DD/ appears.
Time
Format
A 24-hour format (24h) and a 12-hour format
(12h, am and pm) are available for displaying
the time.
Temp.
Format
The units °C and °F are available for displaying
the temperatures.
Sensor
calib.
If the room temperature displayed by the user
interface is not accurate, correct the
discrepancy by up to 5.4 °F (3 °C),
à “Calibrating the room temperature sensor
(Sensor calib.)”
Contrast If what appears on the display is hard to see
because of the lighting conditions, adjust the
contrast of the display (36 % ... 64 %).
Table 21

6 720 821 652 (2017/05) CRC200
20 | Energy-saving tips
6 Energy-saving tips
Economy heating
• Use the time program by activating automatic mode. Set
the required room temperatures for the heating and
setback operating modes in accordance with your personal
temperature preferences. Adjust the time programs to suit
your lifestyle.
–Heating mode = Comfortable living environment
–Setback mode = Active living, away from home or
asleep
• Keep the user interface away from external heat sources
(e. g. sunlight, tiled stoves, etc.). Otherwise there may be
undesired fluctuations in the room temperature.
• Never position large objects such as a sofa immediately in
front of radiators (maintain a clearance of at least 50 cm).
Otherwise, the heated air cannot circulate and heat the
room adequately.
• If you reduce the room temperature by 2 °F (1 K / 1 °C), you
can save up to 6 % energy.
However, allowing the room temperature of heated rooms
to drop below + 59 °F (+ 15 °C) daily is not recommended.
This way, the walls cool off too much. In the heat-up phase,
the room climate is disturbed by the cold walls, which
continue to emit cold. If you further increase the room
temperature, more energy is used than with the same
amount of heat supply.
• With good heat insulation of your building, it is possible that
after a heating phase the desired room temperature for the
setback mode will not be reached. Nevertheless, energy is
being saved as the heating system stays off.
You save still more energy if you set the switching time for
the setback mode earlier.
Ventilating properly
Briefly open the windows fully instead of only a little. If the
windows are only open a little, heat is constantly drawn out of
the room without significantly improving the indoor air.
Water heating on demand
• If the heating phases and the times at which hot water is
required are closely aligned, use the time program for
water heating in automatic mode as well.
• Set the hot water temperature as low as possible. This
saves a lot of energy without noticeably impairing DHW
convenience.
7 FAQ
Why do I set a room temperature when the control is
weather-compensated control though the room
temperature is not considered by the control?
By setting the room temperature, you change the heating
curve. By changing the heater curve, the temperature of the
heating water changes and with it the temperature of the
radiators.
Why does the room temperature measured with a separate
thermometer not correlate with the displayed room
temperature?
Various different factors influence the room temperature. If the
user interface is installed on a cold wall, it will be affected by the
cold temperature of the wall. If it is mounted in a warm part of
the room, such as close to a fireplace or chimney, it will be
influenced by the heat there. Therefore, a separate
thermometer can indicate a different room temperature than
that set at the user interface. When comparing the displayed
room temperature with temperatures measured by another
thermometer, it is important to remember the following:
• The separate thermometer and the user interface must be
physically close to each other.
• The separate thermometer must be accurate.
• When comparing, do not measure the room temperature
when the system is heating up, as the two devices may
react at different speeds to the change in temperature.
If you have followed these instructions and you can still detect
a discrepancy, you can now calibrate the room temperature
display (page 19).
Why do the radiators get (too) hot when the outside
temperature is relatively high?
Even in the summer, the radiators may be heated for a short
time under specific circumstances: namely, when the pump is
started up automatically at a predefined interval, to prevent it
from "seizing up" (jamming). If the pump happens to be started
up immediately after water heating, the unused residual heat is
dissipated via the heating circuit and the radiators.
Why does the pump run at night, even though the home is
not being heated at all or only very little?
The setback type Reduced operation is set permanently for
the user interface. In order to maintain a lower room
temperature, the pump continues to run even if the heating is
reduced.
The measured room temperature is higher than the
required room temperature. Why is the heat source still
running?
The heat source may be heating hot water.
CAUTION: Health hazard due to legionella!
▶ At lower hot water temperatures, activate
thermal Disinfection.