Worcester Bosch Comfort+ II RF Installation and operating instructions

Warnings
In warnings, signal words at the beginning of a warning are used to indicate the type and seriousness of the ensuing risk if measures for minimising danger are not taken.
The following signal words are defined and can be used in this document:
DANGER:
DANGER indicates that severe or life-threatening personal injury will occur.
WARNING:
WARNING indicates that severe to life-threatening personal injury may occur.
CAUTION:
CAUTION indicates that minor to medium personal injury may occur.
NOTICE:
NOTICE indicates that material damage may occur.
Important information
The info symbol indicates important information where there is no risk to people or property.

General safety instructions

Instructions 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.

Determined use

Use the product only to control heating systems.
Any other use is considered inappropriate. We take no responsibility for damage caused through incorrect use.

Damage 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.
Correct any faults immediately.

Risk of scalding at the DHW drawoff 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.

Electrical work
Electrical work may be carried out only by qualified electricians.

Before starting electrical work:
- Isolate all poles of the mains voltage and secure against reconnection.
- Make sure the mains voltage is disconnected.
Never connect the product to the mains voltage.
Observe the wiring diagrams of other system components as well.

Product information

The Comfort+ II RF contains the programmable, wall-mounted Comfort+ II RF control unit for wireless remote control and the key that is attached in the heat source.

User interface

The control unit is a room, temperature-dependent controller. The control unit can be used together with a wireless outside temperature sensor as a weather-compensated wireless controller. The purpose of the control unit is to control a heating system via radio remote control and it is mounted on the wall. The control unit is suitable for central heating and DHW heating via a heating controller with modulation. Up to six switching times can be set in the central heating and DHW program. The modulation facilitates intelligent communication with the heat source so the required room temperature is obtained as efficiently as possible. The burner may stop shortly before the required room temperature is reached in order to save fuel/ money and minimize the extent to which the required room temperature is exceeded. This behavior, together with lower radiator temperatures, is normal. The required room temperature must only be set once at the control unit. Open the thermostatic valves at the radiators in the room in which the control unit is used completely and set the output of the radiators as low as possible via adjustable lockshield valves or set the manual valves as low as possible. All programming and adjustment can be carried out conveniently from the living space which means the Comfort+ II RF is the perfect choice for heat sources that are difficult to access.

1	Display	Temperature, time, date, heating (CH) and DHW (ECS), fault code, menu symbols and symbols
2	Hot Water key	ON, OFF, AUTO
3	Menu key	Pressed once, advances the timer to the next programmed ON or OFF time, pressed again, returns to the current program.
4	Rotary push button knob: select (turn) and confirm (press)	Select (turn), confirm (press), exit the idle state (press briefly) and switch on the display illumination (press for longer than one second)
5	key	Pressed once, advances the timer to the next programmed ON or OFF time, pressed again, returns to the current program.
6	Central heating key	ON, OFF, AUTO

Key

The key must be used in conjunction with the control unit.
The key is installed in the heat source.

Button on key
LED on key

Description of the LED displays	Example
Red flashing LED: Fault, e.g. no EMS connection: ▶ Install the key again, restore the last functioning status. Yellow flashing: No fault, user please wait. Flashing green: No fault, initialisation process is running.
Constant red: Temporary fault: ▶ Wait for normal operating conditions to be resumed. Constant yellow LED: No fault, time and date not available: ▶ Set the time and date on the appliance. Constant green LED: No fault, normal operating condition.
LED Off: No fault, power-saving mode or appliance switched off.

Installation and commissioning

CAUTION:
Electrical work
Electrical work must only be carried out by a qualified electrician.

Before starting electrical work: Isolate the mains electrical supply and secure against unintentional re-connection.
Check for zero voltage.
Also observe connection diagrams of other system components.

For information on the heat source, Technical documentation for the heat source.
These instructions contain the installation and operating instructions for the Comfort+ II RF control unit.

Installation and commissioning key Installation in the heat source

Prior to installation, make sure the strength of the wireless signal at the installation location is sufficient.

Isolate the mains electrical supply and secure against unintentional re-connection.
Install the key in the heat source. For information in installing in the heat source, Technical documentation for the heat source.
Switch on the heat source.

The control unit and key are connected at the factory in the delivered condition and detect each other automatically when switched on. It is not necessary to connect/ disconnect unless there is a problem exists with one or both of the wireless devices.

Insert the batteries in the control unit ( sec 16, page 19).
The key and control unit connect automatically.
While the connection is being established, the control unit shows a countdown starting with 120.
Once installed the display shows the current room temperature after the connection has been established.
Ensure that the signal strength is adequate at the installation location for the control unit, before you install it (Chapter 5.5).
Install the control unit.

Installation and commissioning of the control unit

Putting the control unit into operation
The control unit uses wireless frequencies. It therefore offers flexibility in terms of selecting a position. Connection of cables not required.
Air must be able to circulate freely round the control unit and it must be installed on an open surface unhindered by curtains or furniture. The control unit must not be positioned closer than 300 mm to metal objects, including wall-mounted metal boxes.Do not mount the control unit on a wall where it will be exposed to sunlight or draughts, preferably on an inside wall 1.2 m above the floor.
The control unit must not be directly influenced by radiators or heat-emitting objects, such as TVs or table lamps.

Releasing control unit from wall socket

Insert a screwdriver into the recess on the underside of the control unit.
Gently turn the screwdriver, until the locking device opens.

Wall-mounted installation
Find a position with good signal strength before starting the wall-mounted installation of the control unit. If the signal is weak, try another position in the room, until the best possible signal strength is achieved ( Section “Display wireless signal strength”, page 13).

Use the wall socket as a template to mark the position of the screws.
Drill two suitable holes for the length and diameter of the rawl plugs.
Insert the rawl plugs.
Insert the screws in such a way, that they protrude sufficiently to enable the wall socket to fit behind the screw heads.
Install the wall socket horizontally.

Putting the control unit into operation

Switch on the heat source.
The control unit and key are set and connected at the factory and are therefore immediately functional.
The control unit will initially display the Code 1007 “no wireless signal” (Codes Chapter 8.1). Once the connection has been established, the preset date andtime, the heating and DHW AUTO mode and the current room temperature will appear on the display.
Setting the date and time:

Press the menu key for at least three seconds to open the menu.
Turn the selector to select Settings.
Press the selector.
Set the time, date and time format (Chapter 5).

Using the control unit

The control unit has preset heating and DHW switching times ( Table 2). These settings can be adapted to the requirements of the end customer ( Chapter 5). The switching times can also be reset to the default setting ( Chapter “Restoring the factory settings (Reset all)”, Reset all).

Switching time	06:30	08:30	16:30	22:30
Heating temperature	20 °C	16 °C	21 °C	10 °C
Domestic Hot Water	ON	OFF	ON	OFF

Standard display

Current room temperature
DHW operating mode
Day of the week
Clock
Burner in operation (lights up if heat source is in heating mode; up to 6-minute delay)
Frost protection (lights up in heating mode OFF)
am or pm (lights up if 12-hour time format is used)
Heating operating mode
Battery low

The standard display (Fig. 8) shows the following:

the current room temperature (Pos. [1]),
the weekday (Pos. [3]),
date and time (Pos. [4]) in 12- or 24-hour format, if the display is illuminated,
am or pm (Pos. [7]) in 12-hour format,
a battery symbol (Pos. [9]), if the batteries need to be changed ( Chapter 9.1),
a “Burner in operation” symbol (Pos. [5]), when the burner is in operation. There can be a delay of up to six minutes between actual burner operation and indication on the display.
a “Frost protection” symbol (Pos. [6]), if the heating mode OFF is set.
the heating operating mode (Pos. [8]), i.e. ON, OFF, AUTO or ADV.

Press the select heating program key to select one of the following operating modes:

ON = heating is permanently on
OFF = heating is permanently off
AUTO = programmed switching times are executed
ADV = select/deselect the heating program in the AUTO operating mode by pressing the advance key to bringthe next programmed switching time forward or to revert to the normal program.
the DHW heating operating mode (Pos. [2]), i.e. ON, OFF, ONCE, AUTO or ADV.

Press select DHW program key to select one of the following operating modes:

ON = DHW heating permanently on
OFF = DHW heating permanently off
ONCE = DHW heating on, from the first programmed switch-on time to the last programmed switch-off time
AUTO = programmed switching times are executed
ADV = select/deselect DHW program in the AUTO operating mode by pressing the advance key to bring the next programmed switching time forward or to revert to the normal program.

Weak wireless signal
Code 1007 indicates an absence of wireless signal, page 14 and page 15.

Call up/select the temperature setting of operating modes

Room temperature display of Auto operating mode

If the control unit is in the Auto operating mode, press the selector to display the set value for room temperature, and the next switching time. Fig. 9 shows an example in which the set value is 15 °C up to 16:30 o’clock.

Room temperature display of On operating mode

If the control unit is in the On operating mode, press the selector to display the text Permanently and the set permanent room temperature.

Room temperature display of Off operating mode
If the control unit is in the Off operating mode, press the selector to display the text Permanently and the temperature 5 °C.
After three seconds the screen will revert to the actual room temperature. The frost protection symbol ( Fig. 8, Pos. [6])is displayed. The heat source supplies heat as soon as the room temperature falls below 5 °C to protect the system against freezing.

Setting the room temperature
The display shows the current room temperature in normal mode.
Turn the selector anticlockwise in the Auto or On operating mode to reduce the set value for room temperature, or clockwise to increase it. The selected temperature flashes for three seconds.
The new temperature appears briefly on the display and also the switching time when this temperature applies.

Key lock

When the key block is active, interaction between the user and control unit is not possible. Key lock appears when the key is pressed or the selector is pressed/turned.
Activating the key block
To activate the key block:

Press and hold the select heating key and selector simultaneously until Key lock is displayed. After a short time, the standard display reappears. Switching the key block off
To deactivate the key block:
Press and hold the select heating key and selector simultaneously until Key lock is no longer displayed. After a short time, the standard display reappears.

Settings in the main menu

Press the menu key until the main menu is displayed.
Turn the selector to select the a symbol.
A frame appears round the selected symbol.
Press the selector to open the menu.
Flashing arrows indicate that additional menus are available.
Press the key to return to the higher-level menu.
The display backlighting switches off after 20 seconds of user inactivity until a key is pressed again or the selector is pressed/ turned.
The standard display reappears after 60 seconds of user inactivity.

Time program for adjusting the heating

The purpose of this time program is to adjust the temperature from the corresponding switching time. The control unit has the following factory settings:

Switching time	06:30	08:30	16:30	22:30
Heating temperature	20 °C	16 °C	21 °C	10 °C

Select the “Heating” symbol in the main menu.
Press the selector.
Time program is displayed.
Press the selector.
Mo-Fr is displayed.
Turn selector if necessary to select a different time period.
The following time periods can be selected:
- Mo-Fr
- Sat-Sun
- Monday
- Tuesday
- Wednesday
- Thursday
- Friday
- Saturday
- Sunday
Press the selector.
Time setting 1 is displayed. This is the time of the first temperature change, e.g. the first heating phase of the day.
The hours display flashes.
Turn the selector if necessary to set the hour.
Press the selector.
The minutes display flashes.
Turn the selector if necessary to set the minutes.
Press the selector.
Temp. setting 1 is displayed. This is the temperature following the time of the first temperature change, e.g. forthe first heating phase of the day.
The temperature indicator flashes.
Turn the selector if necessary to set the temperature.
Press the selector.
Time setting 2 is displayed.
The hours display flashes.
Set Time setting 2 and Temp. setting 2.
Set or deactivate Time setting 3 up to Temp. setting 6 ( Chapter 5.3).

If a switching time is not used and no values are set:

After the last temperature set, press the selector repeatedly without making any further settings.
Example showing the adjustment of switching times:

Time setting 1, Temp. setting 1: time before getting up and comfortable temperature for getting up.
Time setting 2, Temp. setting 2: time and temperature after leaving the house.
Time setting 3, Temp. setting 3: time before returning home and comfortable living temperature.
Time setting 4, Temp. setting 4: time after going to sleep and temperature during the night until the next switching time.
If more switching times are required, repeat the procedure for
Time setting 5, Time setting 6 and Temp. setting 5,
Temp. setting 6.

Setting the DHW time program

The purpose of this time program is to adjust the DHW heating switch-on/switch-off times. The control unit has the following factory settings:

Switching time	06:30	08:30	16:30	22:30
Domestic Hot Water	ON	OFF	ON	OFF

Select the “DHW” symbol in the main menu.
Press the selector.
Time program is displayed.
Press the selector.
Mo-Fr is displayed.
Turn selector if necessary to select a different time period.
The following time periods can be selected:
- Mo-Fr
- Sat-Sun
- Monday
- Tuesday
- Wednesday
- thursday
- Friday
- Saturday
- Sunday
Press the selector.
DHW 1 on is displayed.
The hours display flashes.
Turn the selector if necessary to set the hour.
Press the selector.
The minutes display flashes.
Turn the selector if necessary to set the minutes.
Press the selector.
DHW 1 off is displayed.
The hours display flashes.
Turn the selector if necessary to set the hour.
Press the selector.
The minutes display flashes.
Turn the selector if necessary to set the minutes.
Press the selector.
DHW 2 on is displayed.
The hours display flashes.
Set DHW 2 on and DHW 2 off.
Set or deactivate DHW 3 on and DHW 3 off if necessary ( Chapter 5.3).
If the third switching time is not used and no values are set:
After DHW 2 off, press the selector repeatedly without making any settings.

Deactivate switching times

In the heating or DHW time program, press the selector until the switching time to be deactivated is displayed.
The hours display flashes.
turn the selector to set the flashing hours display to 00.
Press the selector.
The minutes display flashes.
Turn the selector clockwise past 00 until the dashes appear.
The switching time is deactivated.

Holiday

select the “Holiday” symbol in the main menu.
Press the selector.
Holiday prog. is displayed.
Press the selector.
OFF flashes.
Select ON.
Press the selector.
The start and end date of the holiday are displayed.
The day of the start date flashes.
Turn the selector if necessary to set the day.
Press the selector.
The month of the start date flashes.
Turn the selector if necessary to set the month.
Press the selector.
The day of the end date flashes.
Set end date (day/month).
After the month display for the end date has been set, the menu closes. If the holiday program has been set, this becomes active at midnight on the first day that has been set and inactive at midnight on the last day that has been set. The heating and DHW heating are switched off while the holiday program is active. These revert to normal operation at the end of the holiday. The frost protection symbol is displayed to indicate that the heat source is off but is switched on at temperatures below 5 °C to provide protection against freezing.

Cancel the holiday program:

Select the “Holiday” symbol in the main menu.
Press the selector.
Holiday prog. and ON is displayed.
Press the selector.
ON flashes.
Turn the selector to select OFF.
Press the selector.
Press the key to return to the standard display.

Information

Select the “Info” symbol in the main menu.
The following menu items are real-time live information from the boiler and are available in the “info” menu:
- System Pressure
- Outdoor temp.
- DHW
- Signal strength
- Energy Consumption
  Display DHW temperature
Turn the selector to select DHW.
Press the selector.
Turn the selector to display the set or actual temperature value.
Press the key to return to the standard display.

Display wireless signal strength

Turn the selector to select Signal strength.
Press the selector.
The signal strength is displayed as a number from 0 to 10.

Do not display the signal strength for too long as this quickly depletes the batteries.

0	=	No reception
1 – 3	=	Poor reception
4 – 6	=	Good reception
7 – 10	=	Very good reception

Settings

Select the “Settings” symbol in the main menu.
The following menu items are available in the “Settings” menu:
Language (default setting EN)
Time/date
Format
- Date format (default setting: DD.MM.YYYY)
- Time format
- Sensor calib.(default setting: 0.0 °C)
- Contrast (default setting: 10)
Reset all

Setting the language

Turn the selector to select Language.
Press the selector.
Turn the selector to select a language:
- EN (English)
- FR (French)
Press the selector.

Setting the time

Turn the selector to select Time/date.
Press the selector.
Clock time is displayed.
Press the selector.
The hours display flashes.
Turn the selector if necessary to set the hour.
Press the selector.
The minutes display flashes.
Turn the selector if necessary to set the minutes.
press the selector.

Setting the date

Turn the selector to select Time/date.
Press the selector.
Clock time is displayed.
Turn the selector to select Date.
Press the selector.
The day flashes.
Turn the selector if necessary to set the day.
Press the selector.
The month flashes.
Turn the selector if necessary to set the month.
Press the selector.
The year flashes.
Turn the selector if necessary to set the year.
Press the selector.
Turn the selector to select DST.
Press the selector.
Turn the selector to select ON or OFF.
Press the selector.

Setting Date format

Turn the selector to select Format.
Press the selector.
Turn the selector to select Date format.
Press the selector.
Turn the selector to select DD.MM.YYYY or MM/DD/YYYY.
Press the selector.
The date format is displayed after a few seconds.

Setting Time format

Turn the selector to select Format.
Press the selector.
Turn the selector to select Time format.
Press the selector.
Turn the selector to select 12 or 24-hour format.
Press the selector.
Time format is displayed after a few seconds.

Setting Sensor calib.
If the displayed room temperature is incorrect, a calibration of up to ± 3 °C can be set.

Turn the selector to select Format.
Press the selector.
Turn the selector to select Sensor calib.. the set sensor calibration is displayed.
Press the selector.
The set sensor calibration flashes.
turn the selector to set the sensor calibration.
Press the selector.

Setting the display contrast

Turn the selector to select Format.
Press the selector.
Turn the selector to select Contrast.
Press the selector.
The current contrast flashes.
Turn the selector to set the desired contrast level between 0 and 20.
Press the selector.

Restoring the factory settings (Reset all)
Reset all restores the factory settings of all settings in the main menu of the control unit.
All adjusted switching times and temperatures for central heating or DHW heating and all other settings must be reentered. The factory settings can be found under the relevant menu item description.

Turn the selector to select Reset all.
Press the selector to confirm.
NO flashes.
If a reset is required, turn the selector to select YES.
Press the selector.
Lines appear one by one on the display until four can be seen briefly. Reset all reappears in the display. The factory settings of the control unit ( Table 5) have been restored. Every switching time for central heating of DHW heating that was previously adjusted must be reset.

Switching time	06:30	08:30	16:30	22:30
Heating temperature	20 °C	16 °C	21 °C	10 °C
Domestic Hot Water	ON	OFF	ON	OFF

Settings in the service menu (installer)

The following functions are only used by specialists. They are used to install the Comfort+ II RF or for troubleshooting.

Press the menu and keys until the main menu with the service menu is displayed ( Fig. 14).
Turn the selector to select the “service menu” symbol.
Press the selector.
The following menu items are available in the service menu:
- System data
- Reset all
- Heat.circuit
- Maintenance
  - Fault history
  - Maintenance
- System info
- Radio settings
- Weather Comp.
  The top line of text in the display shows the menu items.
  Flashing arrows indicate that additional menus are available.

System data

Turn the selector to select System data.
Press the selector.
HC assignment is displayed.The number 1 appears in the display, i.e. there is only one heating circuit.
Press the key to return to System data.

Restoring the factory settings (Reset all)
The Reset all menu item restores the factory settings for all settings in the service menu. The factory settings can be found under the relevant menu item description.

Turn the selector to select Reset all.
Press the selector.
NO flashes.
Turn the selector to select NO or YES.
Press the selector.
If YES is selected, the factory settings are restored for all settings in the installer menu. Four lines appear one by one on the display until the reset is complete. If NO is selected, a reset is not performed.

Heat.circuit
This menu item allows the installer/service engineer to set the maximum flow temperature for the heating in order to increase the efficiency of the heating system. The default setting is 85 °C.

Turn selector to select Heat.circuit.
Press the selector.
Press the selector.
Max. flow is displayed.
Press the selector.
The temperature flashes.
Turn selector to select the required temperature for the heating system requirements.
Press the selector.
Press the key to return to Heat.circuit.

Reading out Fault history

Turn the selector to select Maintenance.
press the selector.
Press the selector to display Boiler faults.
Heat source faults are displayed here and at the heat source. The control unit may be far away from the heat source. It may therefore be helpful to view the faults of the heat source at the control unit.
Press the selector to display the first five faults with fault code and event date. Turn the selector to scroll through the display. If there were no faults, No fault is displayed.
Press key to return to Boiler faults.
Turn selector to select Cont. faults.
Press the selector to display the first five faults with fault code and event date. Turn the selector to scroll through the display. If there were no faults, No fault is displayed.
Press key to return to Cont. faults.
Press the key, to return to Fault history.
Turn the selector to select Maintenance or press key to return to Maintenance.

Maintenance

Landlord

Call technical customer service to find out how to set the service display or contact telephone number. This menu item is only for council housing tenants. It allows a date to be set for annual service/maintenance. The service display Maintenance appears as a reminder 30 days before the scheduled date. A contact telephone number is shown together with service display. The tenant should call this number to arrange a suitable maintenance date with the landlord. If the service display is not cleared or reset by the service engineer, the control unit limits the room temperature 14 days after the maintenance date to the reduced set value set at the device. Otherwise the central heating and DHW functions are set.

System info

Turn the selector to select System info.
Press the selector to display Install.date.
Press the selector to display the installation date.
Press the selector to return to Install.date.
Turn the selector to select SW controller.
Press the selector to display the program version of the control unit.
press the selector to return to SW controller.
Press the key to return to System info.
Radio settings – connecting/disconnecting
The control unit and key are connected at the factory in the delivered condition and detect each other automatically when switching on.
If the wireless devices still have to be connected, this must be done at the same time (Key  Chapter 7.1).
To connect the wireless devices, both the control unit and key must be disconnected beforehand (Key  Chapter 7).
Make sure that the control unit is positioned as described in Chapter 7 and that the wireless signal is not diminished by metal objects nearby.
It is advisable to find a position with good signal strength installing the control unit on the wall.

Once the connection has been established, check the signal strength at the control unit. If the signal strength is low, try another position in the room, until the best possible signal strength is achieved ( Chapter 5.5, page 12).
The functions Pairing and Unpairing can be found in the installer menu under Radio settings.
To display the installer menu, press menu key and key for at least three seconds.
Six symbols appear at the top of the display:

Heating
DHW
Holiday
Information
settings
Installer menu
Turn the selector to select the symbol.
Press the selector to open the service menu.
Turn the selector to select Radio settings.
Press the selector.
Turn the selector to select Unpairing or Pairing .
If Pairing is selected, press selector. Pairing is displayed by a progress bar and the timer starts at 120 s. Once the connection has been established, the timer is cancelled and the number of connected control units appears on the display as confirmation.
-or-
If Unpairing is selected, press selector. Unpairing is indicated by a progress bar. Once the connection has been disconnected, “0” appears as confirmation on the display.

Key

The key is connected to the control unit. Both communicate via wireless signals. The key has a button and an LED to display various operating conditions.

Connecting/disconnecting the control unit

If a defective wireless device is replaced with a new one, the defective wireless device must be disconnected before the new combination can be connected.
In order to connect/disconnect, both wireless devices must be connected/disconnected. If a defective wireless device is replaced with a new one, the defective one must be disconnected before the new wireless device can be connected. The new wireless device combination must be connected at the same time.
While the control unit is disconnecting, press the button on the key for longer than ten seconds to disconnect the key. The LED flashes five times in five seconds during the disconnection process. Once the faulty wireless device has been disconnected, the new wireless device can be mounted and connected.
while the control unit is connecting, press the button (Fig. 15, Pos. [2]) on the key briefly to connect the key.
The LED (Fig. 15, Pos. [1]) flashes twice in five seconds while the connection is being established.

LED on the key (for the LED coding  Table 1)
button on key

Factory reset

To perform a factory reset, press and hold the button on the key.
The LED flashes yellow for five seconds.
The restart takes place after two seconds.

Troubleshooting

If a fault cannot be corrected:

Confirm the fault.
Faults that are still active are displayed once again the next time the control unit returns from the idle state.
Call an authorized specialist or customer service and give the fault code and sub-code, as well as the ID number of the user interface.

Rectify fault

Structure of table headers: code – [cause or fault description].

Faults in the control unit or key

User interface
In the event of a fault, a code is displayed.

1007 – [no wireless signal]
Description	Action
No radio connection between control unit and key.	Check the signal strength and position the control unit in a better place.

1009 – [no wireless signal or connection failed]
Description	Action
No radio connection between control unit and key.	Reconnect wireless device.

309x; x=number of heating circuit – [control unit temperature sensor faulty]
Description	Action
Control unit temperature sensor outside the permissible range.	Replace control unit.

1004 – [fault in other control unit]
Description	Action
Another control unit in the system has developed a fault.	Check other control units in the system for faults.

1010 – [no communication with heat source via EMS-BUS]
Description	Action
No communication, although heat source is compatible with EMS.	Replace EMS connections/ interfaces.

1009 – [not connected]
Description	Action
Wireless device is not connected.	Disconnect and reconnect all wireless devices.

[blank display or low battery symbol]
Description	Action
Batteries are used up.	Replace batteries.

1017- [system pressure too low]
Description	Action
System pressure is too low.	Fill system.

207 – [low system pressure]
Description	Action
System pressure is low.	Fill system.

1070 – [maintenance due on …]
Description	Action
Maintenance is next due on	Inform the installer that
<dd.mm.yyyy>. Please call	maintenance should be
your installer, tel. <tel nr>	carried out within the next 30 days

1071 – [maintenance now due]
Description	Action
Maintenance is now due. Please call your installer, tel. <tel nr>	Inform the installer that maintenance should be carried out

1072 – [maintenance overdue]
Description	Action
Maintenance is overdue. Please call your installer, tel. <tel nr>	Inform the installer that maintenance is 14 days overdue

Key
The LED flashes every second if a fault display is present (e.g. no EMS connection).

[LED flashes once per second]
Description	Action
Local program fault No fault in the heat source but probably loss of the wireless signal to at least one control unit.	Check the control units for faults.

Maintenance

The control unit and key require no maintenance other than changing the batteries in the control unit.
The casing can be cleaned with a dry cloth. Do not use cleaning agents or solutions.

Replace the batteries of the control unit

As soon as the symbol for weak batteries is displayed in normal operation, the batteries must be replaced within the next 60 days, otherwise the programmed settings are lost.
Replace the batteries with new ones of the same type: LR6/AA 1.5 V Alkaline.

Access to the batteries
To release the control unit from the wall socket:

Insert a flat-head screwdriver into the recess on the underside of the control unit.
Gently turn the screwdriver, until the locking device is open.
Release the control unit from the wall socket.

Replace batteries

Replace used batteries with new ones of the same type (AA).
Ensure that the + pole of the battery is inserted in the + pole of the battery compartment.
Fit the control unit into the wall socket: first insert into the lugs [1] at the top and then latch the underside into place.

CAUTION:
Risk of explosion if the battery is replaced with an incorrect type.

Use specified batteries only.

Product data for energy consumption

The product data specified comply with the requirements of EU Regulation No. 811/2013 as a supplement to Ecodesign Directive 2017/1369/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.

Delivery condition adjustable

Classification of the user interface according to EU Regulation 811/2013 for the identification of integrated systems
Contribution to the seasonal energy efficiency of central heating in % 11

Simplified EU Declaration of Conformity regarding radio equipment

Bosch Thermotechnik GmbH hereby declares, that the Comfort+ II RF product described in these instructions complies with Directive 2014/53/EU.
The complete text of the EU Declaration of Conformity is available on the Internet: Worcester-bosch.co.uk.

Specifications

Transmission protocol (wireless)	X3D-C
Transmission frequency	868.00 MHz
Band width frequency	868.7 – 869.2 MHz
Maximum transmitting capacity	10 mW
Installation height	-5 – 1800
Atmospheric pressure	780 – 10505
Operating temperature	0 – 60 °C
Storage temperature	-20 – 85 °C
Relative humidity 23 °C	0 – 80%
Relative humidity 40 °C	0 – 93%
IP rating	IP20, IPX4D according to DIN 40050
Category of receiver	2
Vibration	EN ISO 1335 ASTM 4728
Batteries required	AAA/AA
Battery service life	2 years
Temperature of ball test	75 °C
Degree of pollution	2

Environmental protection/disposal

Used electrical and electronic appliances
Electrical or electronic devices that are no longer serviceable must be collected separately and 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 use the return and collection systems put in place in the country concerned.
Batteries must not be disposed together with your household waste. Used batteries must be disposed of in local collection systems.

Overview Main menu

Functions marked with are only available if an outside temperature sensor is installed. The menu items are displayed in the sequence listed below.

Heating

Time program
Mo-Fr
Sat-Sun
Monday
Tuesday
Wednesday
Thursday
Friday
Saturday
Sunday

Hot water

Time program
Mo-Fr
Sat-Sun
Monday
Tuesday
Wednesday
Thursday
Friday
Saturday
Sunday
Reset DHW Clock Program
No
Yes
Temperature

Holiday

Holiday prog.
Set Date
Holi. temp adj

Info

System Pressure
Outdoor temp.
DHW
Actual temp
Signal strength
Energy Consumption
CH gas cons.
CH elec cons.
DHW gas cons.
DHW elec cons.

Settings

Language1)
Time/date
Clock time
Date
DST
Format
Date format
Time format
Sensor calib.
Contrast
Reset all

Installer

system data
HC assignment
Reset all
Heat.circuit
Max. flow
Heat. Algorithm
Maintenance
Fault history
Maintenance
System info
Install.date
SW controller
SW base station
Radio settings
pairing
Unpairing
Weather Comp.
Type circuit
Max. flow
Max outd. temp.
Des. flow temp.
Base flow temp.
Room Influence

TECHNICAL SUPPORT: 0330 123 3366
RENEWABLE SUPPORT: 0330 123 9229
CONTROLS AND CONNECTIVITY TEAM: 0330 123 3641
APPOINTMENTS: 0330 123 9339
SPARES: 0330 123 9779
LITERATURE: 0330 123 9119
TRAINING: 0330 123 0166
SALES: 0330 123 9669

Bosch Thermotechnology Ltd. Cotswold Way, Warndon Worcester WR4 9SW
United Kingdom
Tel. 0330 123 9559
Worcester-bosch.co.uk

Worcester Bosch Comfort+ II RF Installation and operating instructions

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Worcester Bosch Comfort+ II RF Installation and operating instructions