Bosch Worcester Digital Twin Channel Programmer Manual

UK/IE
INSTALLATION & OPERATING INSTRUCTIONS
DIGITAL TWIN CHANNEL
PROGRAMMER
OFF
ONCE
TIMED
ON
HOT WATER
ADVANCE ADVANCE
SET?
YES
SELECT SELECT
CENTRAL HEATING
OFF
ONCE
TIMED
ON
AM
TEST? CLOCK? PROG? DATE? HDAY?
MON TUE WED THU FRI SAT SUN
CH ON
OFF
6720642251-00.1Wo
FOR USE WITH THE FOLLOWING GREENSTAR HIGH EFFICIENCY APPLIANCES:
GREENSTAR HE 25, 27, 30 COMBI
GREENSTAR HE R25, R30 COMBI
GREENSTAR HIGHFLOW 440 COMBI
GREENSTAR HE 27, 28 SYSTEM
GREENSTAR HE R28 SYSTEM
6 720 642 251 (2009/11)

2
CONTENTS
6 720 642 251 (2009/11)
CONTENTS
1 Symbols and safety precautions 3
1.1 Explanation of symbols 3
1.2 Safety precautions 3
2 General information 4
3 Fitting the programmer 6
4 Programmer controls 7
4.1 Central heating 7
4.2 Hot water 8
4.3 Pre-set program 9
4.4 Setting the time 10
4.5 Setting the date 12
4.6 Setting the programs 14
4.6.1 Setting CH Mon - Fri 14
4.6.2 Setting HW Mon - Fri 16
4.6.3 Setting individual weekdays 17
4.6.4 Setting CH individual weekdays: 17
4.6.5 Setting HW individual weekdays 19
4.6.6 Setting CH sat - sun 20
4.6.7 Setting HW sat - sun: 21
4.6.8 Setting individual weekend days: 22
4.6.9 Setting CH individual weekend days 22
4.6.10Setting HW individual weekend days 24
4.6.11Testing the programmes 25
4.6.12Setting holidays 26
5 MAINTENANCE AND SPARES 28
5.1 Maintenance 28
5.2 Servicing 28
5.3 Replacement parts 28

3
SYMBOLS AND SAFETY PRECAUTIONS
6 720 642 251 (2009/11)
1 SYMBOLS AND SAFETY PRECAUTIONS
1.1 EXPLANATION OF SYMBOLS
WARNING SYMBOLS
Signal words indicate the seriousness of the
hazard in terms of the consequences of not
following the safety instructions.
•NOTICE indicates possible damage to
property or equipment, but where there is no
risk of personal injury.
•CAUTION indicates possible personal injury.
•WARNING indicates possible severe personal
injury.
•DANGER indicates possible risk of life.
IMPORTANT INFORMATION
ADDITIONAL SYMBOLS
1.2 SAFETY PRECAUTIONS
IF YOU SMELL GAS:
BDO NOT SMOKE OR STRIKE MATCHES
BDO NOT TURN ELECTRICAL SWITCHES ON
OR OFF
BPUT OUT NAKED FLAMES
BOPEN DOORS AND WINDOWS
BKEEP PEOPLE AWAY FROM THE AFFECTED
AREA
BTURN OFF THE CONTROL VALVE AT THE GAS
METER
BCALL YOUR GAS COMPANY
OR
BCALL THE EMERGENCY NUMBER 0800 111
999
APPLIANCE OPERATION
This appliance must only be operated by a
responsible adult who has be instructed in,
understands and is aware of the appliance‘s
operating conditions and effects.
Safety instructions in this document
are framed and identified by a
warning triangle which is printed on
a grey background.
Electrical hazards are identified by
a lightning symbol surrounded by a
warning triangle.
Notes contain important information
in cases where there is no risk of
personal injury or material losses and
are identified by the symbol shown
on the left. They are bordered by
horizontal lines above and below the
text.
Symbol Meaning
Ba step in an action sequence
Æa reference to a related part in
the document or to other related
documents
•a list entry
–a list entry (second level)
Tab. 1 Symbols

4
GENERAL INFORMATION
6 720 642 251 (2009/11)
2 GENERAL INFORMATION
SPECIFICATIONS
•Twin channel programmer for CH and DHW
mounted into the boiler fascia
•Factory set date and time
•Automatic switch over to and from Day light
savings time (GMT - BST)
•Seven day programmer
•Three ON/OFF periods per day
•Pre-programmed ON/OFF periods
•Dedicated advance buttons
•12 hour digital display
•Holiday functions
•Pre-wired connector
OFF
ONCE
TIMED
ON
HOT WATER
ADVANCE ADVANCE
SET?
YES
SELECT SELECT
CENTRAL HEATING
OFF
ONCE
TIMED
ON
AM
TEST? CLOCK? PROG? DATE? HDAY?
MON TUE WED THU FRI SAT SUN
CH ON
OFF
6720642251-00.1Wo

5
GENERAL INFORMATION
6 720 642 251 (2009/11)
TECHNICAL DATA
DESCRIPTION UNITS PROGRAMMER
Electrical supply Volts d.c. 24
Ambient operating temperatures °C 0 to +50
Humidity operating range % non-condensing up to 45° 30 - 95
Class of protection II
Degree of protection IP 20
Battery back up: programme Always
Battery back up: time Always
Battery back up: display hours None
Shortest switching period minutes 1
DHW & CH on/off periods number/days 3
DHW & CH programmes days 7
Tab. 2

6
FITTING THE PROGRAMMER
6 720 642 251 (2009/11)
3 FITTING THE PROGRAMMER
1. Refer to the applicable appliance manual for
instructions and remove the outer casing.
2. Remove the fascia cover plate by releasing the
clip at the top and withdraw the cover plate
from the front.
3. Connect the programmer plug to the four way
connection on the PCB, see figure below.
4. Push the programmer into position ensuring
that the lead is not trapped and the clip is
properly engaged.
5. Replace the appliance casing.
WARNING: Disconnect the electrical mains supply and turn off the gas supply before
working on the appliance.
ST5
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7
PROGRAMMER CONTROLS
6 720 642 251 (2009/11)
4 PROGRAMMER CONTROLS
4.1 CENTRAL HEATING
1. Press SELECT button to choose:
BOFF = constantly off
BTIMED = up to three ON and three OFF time
periods as per programme
BONCE = ON from first ON and OFF after the
third OFF period
BON = constantly on
2. Press ADVANCE button:
BCENTRAL HEATING light on (heating stays on
until next OFF period)
-or-
BCENTRAL HEATING light off (heating stays off
until next ON period)
ADVANCE
SELECT
CENTRAL HEATING
OFF
ONCE
TIMED
ON
AM
OG? DATE? HDAY?
T
HU FRI SAT SUN
CH ON
OFF
ADVANCE
SELECT
CENTRAL HEATING
OFF
ONCE
TIMED
ON
AM
OG? DATE? HDAY?
T
HU FRI SAT SUN
CH ON
OFF
1
2
6720642251-01.1Wo
ADVANCE will not function with
constant ON or OFF selected.

8
PROGRAMMER CONTROLS
6 720 642 251 (2009/11)
4.2 HOT WATER
1. Press SELECT button to choose:
BOFF = constantly off
BTIMED = up to three ON and three OFF time
periods as per programme
BONCE = ON from first ON and OFF after the
third OFF period
BON = constantly on
2. Press ADVANCE button:
BHOT WATER light on (hot water stays on until
next OFF period)
-or-
BHOT WATER light off (hot water stays off until
next ON period)
1
OFF
ONCE
TIMED
ON
HOT WATER
ADVANCE SET?
YES
SELECT
TEST? CLOCK? P
R
MON TUE WED
T
OFF
ONCE
TIMED
ON
HOT WATER
ADVANCE SET?
YES
SELECT
TEST? CLOCK? P
R
MON TUE WED
T
2
6720642251-02.1Wo
ADVANCE will not function with
constant ON or OFF selected.

9
PROGRAMMER CONTROLS
6 720 642 251 (2009/11)
4.3 PRE-SET PROGRAM
If you need to restore the factory preset
program times then:
1. Press the SET? and PLUS buttons together to
restore the default program times as shown in
table 3.
1
1
OFF
ONCE
TIMED
ON
HOT WATER
ADVANCE ADVANCE
SET?
YES
SELECT SELECT
CENTRAL HEATING
OFF
ONCE
TIMED
ON
AM
TEST? CLOCK? PROG? DATE? HDAY?
MON TUE WED THU FRI SAT SUN
CH ON
OFF
6720642251-03.1Wo
Two ON/OFF periods can be used
instead of three by setting the 2nd
ON/OFF times to 12:00 as shown in
the default table 3.
One ON/OFF period can be
achieved by setting the 2nd and 3rd
ON/OFF times to the same time.
See page 14 SETTING PROGRAMS
if changes are required to the pre-
programmed settings.
1st 1st 2nd 2nd 3rd 3rd
ON OFF ON OFF ON OFF
AM AM PM PM PM PM
Central heating
MON to FRI
Time 6:30 8:30 12:00 12:00 4:30 10:30
SAT & SUN
Time 7:00 9:00 12:00 12:00 4:00 11:00
Hot water
MON to FRI
Time 6:30 8:30 12:00 12:00 4:30 10:30
SAT & SUN
Time 7:00 9:00 12:00 12:00 4:00 11:00
Tab. 3 Default program periods

10
PROGRAMMER CONTROLS
6 720 642 251 (2009/11)
4.4 SETTING THE TIME
1. Press the SET? button to show SET and
CLOCK? in the display.
2. Press YES to display the time with the hours
flashing.
3. Press the PLUS or MINUS button to correct
the hour, taking note of the AM or PM shown.
The time is preset and normally does not need to be adjusted.
British Summer Time and GMT changes are adjusted automatically.
Press SET? repeatedly to step through “Setting the time” to reach the next section
SET?
YES
1
TEST? CLOCK? PROG? DATE? HDAY?
MON TUE WED THU FRI SAT SUN
CH ON
OFF
6720642251-04.1Wo
SET?
YES
2
AM
TEST? CLOCK? PROG? DATE? HDAY?
MON TUE WED THU FRI SAT SUN
CH ON
OFF
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SET?
YES
3
AM
TEST? CLOCK? PROG? DATE? HDAY?
MON TUE WED THU FRI SAT SUN
CH ON
OFF
6720642251-06.1Wo
Hold down either the PLUS or
MINUS button to speed up the
display changes.

11
PROGRAMMER CONTROLS
6 720 642 251 (2009/11)
4. Press the SET? button to set the correct hour
and then the minutes will flash.
5. Press the PLUS or MINUS button to correct
the minutes.
6. Press the SET? button to set the correct
minutes, SET and DATE? then appear in the
display.
SET?
YES
4
AM
TEST? CLOCK? PROG? DATE? HDAY?
MON TUE WED THU FRI SAT SUN
CH ON
OFF
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SET?
YES
5
AM
TEST? CLOCK? PROG? DATE? HDAY?
MON TUE WED THU FRI SAT SUN
CH ON
OFF
6720642251-08.1Wo
SET?
YES
6
TEST? CLOCK? PROG? DATE? HDAY?
MON TUE WED THU FRI SAT SUN
CH ON
OFF
6720642251-09.1Wo
If you do not wish to change the
date, press SET? until the normal
display is resumed. Alternatively do
not press any buttons and the
display will revert to the normal
display after two minutes.

12
PROGRAMMER CONTROLS
6 720 642 251 (2009/11)
4.5 SETTING THE DATE
1. Press the SET? button to show SET and
DATE? in the display.
2. Press YES to display the date with the year
flashing.
3. Press PLUS or MINUS to correct the year.
The date is preset and does not normally need to be changed.
Press SET? repeatedly to step through “Setting the date” to reach the next section
TEST? CLOCK? PROG? DATE? HDAY?
MON TUE WED THU FRI SAT SUN
CH ON
OFF
1
SET?
YES
6720642251-10.1Wo
2
SET?
YES TEST? CLOCK? PROG? DATE? HDAY?
MON TUE WED THU FRI SAT SUN
CH ON
OFF
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TEST? CLOCK? PROG? DATE? HDAY?
MON TUE WED THU FRI SAT SUN
CH ON
OFF
3
SET?
YES
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Hold down either the PLUS or
MINUS button to speed up the
display changes.

13
PROGRAMMER CONTROLS
6 720 642 251 (2009/11)
4. Press the SET? button to set the correct year
and the month will flash on the display.
5. Press PLUS or MINUS to correct the month.
6. Press the SET? button to set the correct
month and the day will flash on the display.
7. Press PLUS or MINUS to correct the day.
8. Press the SET? button to set the correct day
and the current DLS status will start flashing.
9. Press PLUS or MINUS to turn DLS on or off.
10. Press SET? to return to normal operation.
4
5
SET?
YES TEST? CLOCK? PROG? DATE? HDAY?
MON TUE WED THU FRI SAT SUN
CH ON
OFF
6720642251-13.1Wo
6
7
SET?
YES TEST? CLOCK? PROG? DATE? HDAY?
MON TUE WED THU FRI SAT SUN
CH ON
OFF
6720642251-14.1Wo
8
9
SET?
YES TEST? CLOCK? PROG? DATE?HDAY?
MON TUE WED THU FRI SAT SUN
CH ON
OFF
6720642251-15.1Wo
British Summer Time and GMT time
change are automatically adjusted if
DLS is turned on.
AM
TEST? CLOCK? PROG? DATE? HDAY?
MON TUE WED THU FRI SAT SUN
CH ON
OFF
10
SET?
YES
6720642251-16.1Wo

14
PROGRAMMER CONTROLS
6 720 642 251 (2009/11)
4.6 SETTING THE PROGRAMS
4.6.1 SETTING CH MON - FRI
1. Press SET? until SET and PROG? are shown
on the display.
2. Press YES to enter program.
3. Press YES to select MON - FRI.
If you require different ON/OFF
times during the week, refer to
“Setting individual weekdays” refer
to page 17
TEST? CLOCK? PROG? DATE? HDAY?
MON TUE WED THU FRI SAT SUN
CH ON
OFF
1
SET?
YES
6720642251-17.1Wo
2
SET?
YES TEST? CLOCK? PROG? DATE? HDAY?
MON TUE WED THU FRI SAT SUN
CH ON
OFF
6720642251-18.1Wo
3
SET?
YES TEST? CLOCK? PROG? DATE? HDAY?
MON TUE WED THU FRI SAT SUN
CH ON
OFF
6720642251-19.1Wo

15
PROGRAMMER CONTROLS
6 720 642 251 (2009/11)
4. Press YES to select CH.
5. Press PLUS or MINUS to change the ON time.
6. Press SET? to set the ON time and select the
OFF time.
7. Press PLUS or MINUS to change the OFF time.
8. Press SET? to set the OFF time and select the
next ON time.
Repeat operations 5 to 8 to set the 2nd and
3rd CH ON/OFF times.
4
5
SET?
YES
AM
TEST? CLOCK? PROG? DATE? HDAY?
MON TUE WED THU FRI SAT SUN
CH ON
OFF
6720642251-20.1Wo
Hold down either the PLUS or
MINUS button to speed up the
display changes.
6
7
SET?
YES
AM
TEST? CLOCK? PROG? DATE? HDAY?
MON TUE WED THU FRI SAT SUN
CH ON
OFF
6720642251-21.1Wo
8
SET?
YES
6720642251-22.1Wo
To set 2nd & 3rd on/o times go back to 5
After pressing SET? for the 3rd CH
OFF time the display shows SET HW
MON - FRI.

16
PROGRAMMER CONTROLS
6 720 642 251 (2009/11)
4.6.2 SETTING HW MON - FRI
9. Press YES to select the 1st ON time.
10. Press SET? to set the ON and OFF times as
before.
Repeat operations 5 to 8 to set the 1st, 2nd
and 3rd HW ON/OFF times.
TEST? CLOCK? PROG? DATE? HDAY?
MON TUE WED THU FRI SAT SUN
HW ON
OFF
SET?
YES
3rd CH OFF
6720642251-23.1Wo
9
SET?
YES
AM
TEST? CLOCK? PROG? DATE? HDAY?
MON TUE WED THU FRI SAT SUN
HW ON
OFF
6720642251-24.1Wo
After pressing SET? for the 3rd HW
OFF time the display shows SET
MON, refer to the next section.

17
PROGRAMMER CONTROLS
6 720 642 251 (2009/11)
4.6.3 SETTING INDIVIDUAL WEEKDAYS
BIf you do not wish to change the settings for
the day displayed, then press SET? until the
day you want to change is displayed.
4.6.4 SETTING CH INDIVIDUAL WEEKDAYS:
1. Press YES to select weekday.
2. Press YES to select CH
3. Press PLUS or MINUS to change the ON time.
If you do not require individual
weekday times, press SET? until
SET SAT - SUN are displayed and
continue with page 20
SET?
YES
?
TEST? CLOCK? PROG? DATE? HDAY?
MON TUE WED THU FRI SAT SUN
CH ON
OFF
6720642251-25.1Wo
1
SET?
YES TEST? CLOCK? PROG? DATE? HDAY?
MON TUE WED THU FRI SAT SUN
CH ON
OFF
6720642251-26.1Wo
2
3
SET?
YES
AM
TEST? CLOCK? PROG? DATE? HDAY?
MON TUE WED THU FRI SAT SUN
CH ON
OFF
6720642251-27.1Wo
Hold down either the PLUS or
MINUS button to speed up the
display changes.

18
PROGRAMMER CONTROLS
6 720 642 251 (2009/11)
4. Press SET? to set the ON time and select the
OFF time.
5. Press PLUS or MINUS to change the OFF time.
6. Press SET? to set the OFF time and select the
next ON time.
Repeat operations 3 to 6 to set the 2nd and
3rd CH ON/OFF times.
4
5
SET?
YES
AM
TEST? CLOCK? PROG? DATE? HDAY?
MON TUE WED THU FRI SAT SUN
CH ON
OFF
6720642251-28.1Wo
6
SET?
YES
6720642251-29.1Wo
To set 2nd & 3rd on/o times go back to 3
After pressing SET? for the 3rd CH
OFF time, the display shows SET
HW for that weekday.

19
PROGRAMMER CONTROLS
6 720 642 251 (2009/11)
4.6.5 SETTING HW INDIVIDUAL WEEKDAYS
7. Press YES to select the 1st ON time.
Repeat operations 3 to 6 to set the 1st, 2nd
and 3rd HW ON/OFF times.
8. After pressing SET? for the 3rd HW OFF time
SET and the next weekday are displayed.
TEST? CLOCK? PROG? DATE? HDAY?
MON TUE WED THU FRI SAT SUN
HW ON
OFF
SET?
YES
3rd CH OFF
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7
SET?
YES
AM
TEST? CLOCK? PROG? DATE? HDAY?
MON TUE WED THU FRI SAT SUN
HW ON
OFF
6720642251-31.1Wo
After completing the steps above for
FRI the display shows SET SAT SUN,
refer to next section.

20
PROGRAMMER CONTROLS
6 720 642 251 (2009/11)
4.6.6 SETTING CH SAT - SUN
1. Press YES to select weekend.
2. Press YES to select CH. 3. Press PLUS or MINUS to change the ON time.
4. Press SET? to set the ON time and select the
OFF time.
5. Press PLUS or MINUS to change the OFF time.
6. Press SET? to set the OFF time and select the
next ON time.
Repeat operations 3 to 6 to set the 2nd and
3rd CH ON/OFF times.
1
SET?
YES TEST? CLOCK? PROG? DATE? HDAY?
MON TUE WED THU FRI SAT SUN
CH ON
OFF
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2
3
SET?
YES
AM
TEST? CLOCK? PROG? DATE? HDAY?
MON TUE WED THU FRI SAT SUN
CH ON
OFF
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4
5
SET?
YES
AM
TEST? CLOCK? PROG? DATE? HDAY?
MON TUE WED THU FRI SAT SUN
CH ON
OFF
6720642251-34.1Wo
6
SET?
YES
6720642251-35.1Wo
To set 2nd & 3rd on/o times go back to 3
After pressing SET? for the 3rd CH
OFF time, the display shows SET
HW SAT - SUN.