Bosch CR 50 User manual

6720856748 (2016/03)
Operating instructions
User interface
CR50
6 720 809 984-00.1O
EMS 2

6720856748 (2016/03) CR50
2 | Key to symbols and safety instructions
1 Key to symbols and safety instructions
1.1 Explanation of symbols
Warning symbols
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.
The following keywords are defined and can be used in this
document:
DANGER:
DANGER indicates a situation that will result in severe injury or
death.
WARNING:
WARNING indicates a situation that could result in severe
injury or death.
CAUTION:
CAUTION indicates a situation that could result in minor to
medium injury.
NOTICE:
NOTICE indicates a situation that could result in damage to
property or equipment.
Important information
The info symbol indicates important information where there is
no risk to people or property.
1.2 General safety instructions
HInstructions for the target group
These operating instructions are intended for the heating
system user.
All instructions must be observed. Failure to comply with
instructions may result in material damage and personal injury,
including possible loss of life.
▶ Read and retain the operating instructions (heat source,
heating controller, etc.) prior to operation.
▶ Observe the safety instructions and warnings.
HDetermined use
▶ Only use the product to control solar heating systems in
single-family homes or apartment buildings.
Any other use is considered inappropriate. We take no
responsibility for damage caused through incorrect use.
HDamage caused by frost
The solar 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
on.
▶ Have faults rectified immediately.
HRisk of scalding at the DHW draw-off points
▶ If DHW temperatures above 60 °C are set or if thermal
disinfection is activated, a mixer must be installed. If in
doubt, ask your installer.
2 Product Description
The CR 50 user interface is a control unit without an outdoor
temperature sensor.
2.1 Product data for energy consumption
The specified product data correspond to the requirements of
the EU Regulation No. 811/2013 which supplements ErP
Directive 2010/30/EU. The class of the temperature controller
is required to calculate the central heating energy efficiency of
an integrated system and is for this reason incorporated into
the system data sheet.
Table 1 Product data with regard to energy efficiency of the
user interface
zDelivered condition
1) Classification of the user interface according to EU
Regulation 811/2013 for the labelling of system
packages
2) Contribution to seasonal energy efficiency for central
heating in %
Function of the CR 50 Class1) [%]1),2)
CR 50
Room temperature-
dependent, modulating
V 3.0 z

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Overview of control elements and symbols | 3
2.2 Applicability of the technical documentation
Information in the technical documentation about heat
sources, heating controllers or the BUS apply also to the
present user interface.
3 Overview of control elements and
symbols
Fig. 1 Control elements
[1] Selector: select (turn) and confirm (press)
[2] auto key: Automatic mode following time program
[3] man key: Manual operation
[4] Back key: Returns to previous menu or discards a value
(press briefly); returns to the standard display (hold
down)
[5] menu key: Main menu (press briefly)
Fig. 2 Symbols in the display (examples)
0010004280-001
2
3
5
4
1
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: Afternoon/morning with 12-hour
format (factory setting 24-hour format)
3– Text line:
• Display of time of day (e. g. 14:03)
and current day of the week
(e. g. Mo)
• Displayofmenuitems,settings,info
texts, etc. Additional texts are
identified by direction arrows and
displayed by turning the selector.
4Operating mode: Automatic mode
active (according to time program)
Operating mode: Manual operation
active
Operating mode: Heating mode active
Operating mode: Setback mode active
0010006032-001
Recirculation
Recirculation
12:31
12:31
Tu
Tu
man
man
auto
auto
1
6
42 3
5
8
7
1
3

6720856748 (2016/03) CR50
4 | Operating the appliance
Table 2 Symbols in the display
4 Operating the appliance
An overview of the structure of the main menu and the position
of the individual menu items can be found at the end of this
document.
Eachofthe followingdescriptionstakesthestandarddisplayas
its starting point (ÆFig. 2, page 3 at left).
4.1 Changing the room temperature
Query the desired room temperature
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.
If manual operation 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
permanent(unlimitedtime)thenappearson thedisplayfor
a few seconds.
Changing the room temperature temporarily
If you feel too cold or too hot on this day:
▶ Set and confirm the desired room temperature (or wait a
few seconds).
The setting value stops flashing. The change applies until
the next switching time in your active time program is
reached. The temperature stored in the automatic mode
then becomes active again.
Changing the desired room temperature for the Heating or
Setback operating mode
If you feel continuously too cold or hot:
▶ Open the main menu.
▶ Select and confirm the Heating menu.
▶ Confirm the Temperatures menu
▶ Select and confirm the Heating or Setback menu item.
The current setting flashes.
5Segment display - Solid segments: Time
set for heating mode today
(1 segment = 30 min)
Nosegments: time setfor setbackmode
today (1 segment = 30 min)
6Operating state: Heat source in
operation
7Heatingmenu: Menu with settings for
the heating system
DHW menu: Menu with settings for
water heating
Holiday menu: Menu with settings for
holiday program
Info menu: Menu to display current
information about the heating system,
e. g. heating, hot water
Settings menu: Menu with general
settings, e. g. language, time/date,
formats
8– Unit line: Physical units for the
displayed values, e. g. in the
“Information ”menu
Item Symbol Designation: Explanation
0010006001-001
Set room temp
Set room temp
0010006000-001
Hold
Hold
0010006002-001
to Mo 11:00pm
to Mo 11:00pm
0010006003-001
Temperatures
Temperatures

6720856748 (2016/03)CR50
Operating the appliance | 5
▶ Adjust and confirm the desired room temperature for the
selected operating mode.
The setting value stops flashing.
Enable manual operation and set the desired room
temperature
If you require a room temperature for a period of time which
deviates from the temperatures set for heating or setback:
▶ 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 confirm twice.
▶ Set and confirm the desired room temperature (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).
4.2 DHW settings
Activate once-only cylinder charging (hot water immediate
function)
If you need hot water outside of the times set in the time
program:
▶ Open the main menu.
▶ Select and confirm the DHW menu.
▶ Press the selector.
The current setting flashes.
▶ Select and confirm ON.
Water heating (tank heating or instantaneous flow heating)
becomes active immediately. After heat-up, once-only
cylinder charging switches off again.
Changing DHW temperature
If the hot water is too cold or too hot:
▶ Open the main menu.
▶ Select and confirm the DHW menu.
▶ Select and confirm the Temperature menu item.
The current setting flashes.
▶ Set and confirm the required DHW temperature.
Ifthe maximum valueof thehot watertemperatureexceeds
60 °C, the scalding warning flashes.
▶ Press the back key, set and confirm d60 °C.
-or-
▶ Confirm the setting > 60 °C.
4.3 Setting the time program
Open time program for several days for one individual
weekday
▶ Open the main menu.
▶ Select and confirm the Heating menu.
▶ Select and confirm the Time program menu.
The menu item Mon-Fri is displayed.
▶Mon-Fri (change switching times for all weekdays
together) or Saturday ... Select and confirmed Friday
(change switching times for individual weekdays).
The menu item Heat begin1 is displayed.
0010006004-001
Setback
Setback
0010006005-001
Set room temp
Set room temp
0010006006-001
Loading once
Loading once
0010006007-001
Temperature
Temperature
0010006008-001
Scalding
Scalding
0010006009-001
Mon-Fri
Mon-Fri
0010006010-001
Heat begin1
Heat begin1

6720856748 (2016/03) CR50
6 | Operating the appliance
Set heat begin or setback begin earlier or later
(move switching time)
▶ Open time program for all weekdays or one weekday.
▶ Select and confirm the switching time.
The hour currently set for the switching time and the
associated segment in the segment display start to flash.
▶ Moving switching time to the desired time.
The setting in the value display changes in 15-minute
increments and in the segment display in 30-minute
increments.
▶ Confirm setting.
Add a new heating phase (such as 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 weekday.
▶ Select and confirm Heat begin2.
The new switching time is added. The hour and associated
segment in the segment display start to flash.
▶ SettheswitchingtimeforHeat begin2,suchas14:00,and
confirm.
The new heating phase is added with a duration of one half-
hour. Strt setback2 is set to 14:30. If necessary, move
Strt setback2 to, for example, 23:00.
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.
▶ Select Strt setback2 (end of the heating phase to be
interrupted).
▶SetStrt setback2 to the start of the interruption, such as
18:00.
▶ Add a new heating phase and set heat begin and setback
begin, such as Heat begin3 (21:00) to Strt setback3,
(23:00).
The user interface automatically sorts the heating phases
chronologically.
Delete new heating phase (such as Heat begin2 to Strt
setback2)
▶ Open time program for all weekdays or one individual
weekday.
▶ Select and confirm Strt setback2.
The hour currently set for the switching time and the
associated segment in the segment display start to flash.
▶SetHeat begin2 to the same time as Strt setback2.
Does Delete? appear in the text line?
▶ Confirm Delete? to delete the heating phase.
4.4 Setting up a holiday program
Open the vacation menu
▶ Open the main menu.
▶ Select and confirm the Holiday menu.
The menu item Holiday prog. is displayed.
Activate the holiday program and set the vacation time
▶ Select and confirm the Holiday menu until the OFF setting
value flashes.
0010006011-001
Strt setback1
Strt setback1
0010006012-001
Heat begin2
Heat begin2
0010006013-001
Strt setback2
Strt setback2
0010006014-001
Strt setback3
Strt setback3
0010006016-001
Delete?
Delete?
0010006017-001
Holiday prog.
Holiday prog.

6720856748 (2016/03)CR50
Operating the appliance | 7
▶ Select and confirm ON.
The holiday 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) are
displayed. The holiday start date flashes.
▶ Select and confirm the day for the holiday start.
The day is changed, and the month for the holiday start
flashes.
▶ Select and confirm the month for the holiday start.
The month is changed, and the day for the holiday end
flashes.
▶ Select and confirm the day for the holiday end.
The day is changed, and the month for the holiday end
flashes.
▶ Select and confirm the month for the holiday end.
The vacation program is activated automatically on the
holiday start date. The holiday period for the example
shown runs from 00:00 on 06/08/ to 24:00 on 21/08/.
Interrupt a holiday program
▶ Press the man key.
The user interface will now constantly maintain the set
temperature entered for manual operation. Hot water is
availableonly ifonce-only cylinderchargingis active,orthe
water heating operating mode is ON.
▶ If desired, set the required room temperature.
The user interface will now constantly maintain the new set
room temperature.
▶ Press the auto key to resume the holiday program.
Terminating the holiday program early
▶ Select and confirm the Holiday menu until the ON setting
value flashes.
▶ Select and confirm OFF.
The holiday program is ended prematurely. The setting
values are deleted.
4.5 More settings
Setting the time and date
▶ Open the main menu.
▶ Select and confirm the Settings menu.
▶ Select and confirm the Time/Date menu.
The menu item Time of day is displayed.
▶ Press the selector.
The hours start flashing.
▶ Set and confirm the hour.
The minutes start flashing.
▶ Set and confirm the minute.
▶ Select and confirm the Date menu item.
The date flashes (bear in mind the setting in the menu
Settings > Format > Date format).
▶ Set the day, month and year in the same way as the hours
and minutes.
▶ Press the selector.
The setting value stops flashing.
0010006019-001
20.07. - 27.07.
20.07. - 27.07.
0010006020-001
06.08. - 27.07.
06.08. - 27.07.
0010006018-001
06.08. - 21.08.
06.08. - 21.08.
0010006021-001
12:55 We
12:55 We
0010006022-001
Holiday prog.
Holiday prog.
0010006025-001
Time of day
Time of day
0010006026-001
Time of day
Time of day
0010006024-001
20.07.2011
20.07.2011

6720856748 (2016/03) CR50
8 | Main menu
Switching the key block on/off
▶ Pressand hold the selectorand auto keysimultaneously for
a few seconds until Key lock appears.
▶ Ifacontrolelementisactuatedwhilekeyblockisactive,Key
lock appears in the text line.
▶Remove key block: Press and hold the selector and auto
key simultaneously for a few seconds until Key lock
disappears.
5 Main menu
For an overview of the main menu, see the end of this
document.
5.1 Heating menu
Time program settings
Heating > Time program menu
Table 3
Resetting the time program to the factory settings
Heating > Reset Sched. menu
Table 4
5.2 DHW menu
When the thermal disinfection function is activated, the DHW
cylinder is heated to the temperature. The higher temperature
hot water can be used for thermal disinfection of the hot water
system.
▶ Bear in mind the requirements from the DVGW – Code of
Practice W 511, operating conditions for the recirculation
pump, including the water quality and instructions of the
heat source.
Table 5
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: 06:00 to Strt
setback1: 23:00
• Saturday and Sunday: Heat begin1: 08:00
to Strt setback1: 23:00
This means that you are heating from 23:00 in
the evening until 06:00 on the following day to
the setback temperature only (Saturday and
Sunday until 08:00).
Saturday
Sunday
Monday
Tuesday
Wednesday
Thursday
Friday
Menu item Description
Reset
Sched.
With the aid of the YES setting, an individual
time program can be reset to the factory
settings.
0010006027-001
Key lock
Key lock
Menu item Description
Loading once If once-only cylinder charging is activated
(ON), water heating or temperature
maintenance is active immediately.
Temperature The hot water temperature can only be set
using the remote control if the water heating
is set to automatic mode on the heat source.
Mode The automatic mode for water heating is
active when AUTO appears in the value
display. The time program for heating also
specifies the switching times for water
heating. Continuous water heating or
temperature maintenance is active when ON
appears in the value display. When OFF is in
the value display, the water is not heated or
kept hot.
Recirculation Circulation makes hot water available
immediately at the hot draw-off points.
• If ON is set, hot water is pumped through
the DHW circulation line briefly once or
several times per hour.
• If AUTO is set, hot water is pumped
through the circulation line briefly at the
times water heating is active.
• Set OFF to save energy.
Disinfection Thermal disinfection safeguards the hygienic
qualityofthehotwater.IfAUTO is set, the hot
water is heated to 70 °C once every Tuesday
starting at 2:00 (at night).

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Faults | 9
5.3 Info menu
The current system values and the active operating status can
be displayed via the Info menu. Changes are not possible.
Info > Heating menu
Table 6
Info > DHW menu
Table 7
5.4 Settings menu
Settings > “Language” menu
Table 8
Settings > Time/Date menu
Table 9
Settings > Format menu
Table 10
6 Faults
If a fault persists:
▶ Confirm the fault.
▶ FaultsthatarestillactivearedisplayedbypressingtheBack
key.
▶ Call an authorised contractor or customer service and give
them the fault code and sub-code, as well as the ID no. of
the user interface.
Table 11 Your contractor must enter the ID no. here.
Menu item Description (possible displays)
Operat. stats The current active status is displayed here:
• 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.
• IfManualisdisplayed,theheatingsystem
operates in the manual operation.
Room temp. The currently measured room temperature.
Menu item Description (possible displays)
Operat. stats Display of the current operating status of
water heating: ON or OFF
Set temp Desired DHW temperature.
Actual temp Current measured DHW temperature.
Menu item Function description
“Language”1)
1) The display shows the set language.
Thelanguageusedformenusandmenuitems
can be changed.
Menu item Function description
Time of day Set the current time.
Date Set the current date.
DLS Activate or deactivate automatic changeover
between summer and winter time.
If ON is set, the time of day is automatically
changed from 02:00 to 03:00 (on the last
SundayinMarchandfrom03:00to02:00on
the last Sunday in October).
Time correct. Time correction of the internal clock of the
user interface in seconds per week ( – 20 s/
week ... 20 s/week). Only the unit "s"
(seconds) appears on the display instead of
s/week (seconds per week).
Menu item Function description
Date format Display of the date in all menus
(DD.MM.YYYY or MM/DD/JJJJ), where:
D = day, M = month, Y = year. If the year is
not needed, 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
deviation by up to r3 °C.
Contrast If what appears on the display is hard to see
because of the lighting conditions, adjust the
contrast of the display (36 % ... 64 %).
__ _
Menu item Function description

6720856748 (2016/03) CR50
10 | Old electrical and electronic appliances
7 Old electrical and electronic appliances
Electrical or electronic devices that are no longer
serviceable mustbe collectedseparatelyand sent
for environmentally compatible recycling (in
accordance with the European Waste Electrical
and Electronic Equipment Directive).
To dispose of old electrical or electronic devices, you should
usethereturnandcollectionsystemsputinplace in thecountry
concerned.
8 Overview Main menu
Heating
– Temperatures (automatic mode)
– Heating (heating or day temperature)
– Setback (setback or reduced temperature)
– Time program (changeover between heating/setback)
– Reset Sched. (reset switching times)
DHW
– Loading once (immediate DHW function)
– Temperature (DHW temperature)
– Mode (DHW operating modes)
– Recirculation (circulation operating modes)
– Disinfection (thermal disinfection)
Holiday
– Holiday prog. (holiday program)
Info
– Heating
– Operat. stats (operating status)
– Room temp. (room temperature)
– DHW
– Operat. stats (operating status)
– Set temp (desired DHW temperature)
– Actual temp (current DHW temperature)
Settings
– English1)
– Time/Date
– Time of day
– Date
– DLS (summer/winter)
– Time correct. (of the user interface in s/week)
– Format
– Date format
– Time format
– Temp. Format (unit of temperature)
– Sensor calib. (room temperature correction)
– Contrast
Service2)
1) Set language.
2) Settings in the service menu may only be changed by a
contractor (hidden by default).

Middle East and Caucasian Area
Bosch Termoteknik Isıtma ve Klima Ticaret A.S.
Aydınevler Mah. İnönü Cad. No:20
Küçükyalı Ofispark A Blok
34854 Küçükyalı / Maltepe - İSTANBUL
Tel: [phone]
Products manufactured by
Bosch Thermotechnik GmbH
Junkersstrasse 20-24
D-73249 Wernau
www.bosch-thermotechnology.com