Worcester DT20 User manual

SERVICING
& SPARES
14 MAINTENANCE & SPARES FITTING & OPERATING INSTRUCTIONS FOR WORCESTER BOSCH
TWIN CHANNEL DT20 PROGRAMMER
8-716-106-647 iss e b (11.04) UK
DIGITAL TWIN CHANNEL PROGRAMMER
FOR GREENSTAR i and GREENSTAR Si MODELS
INSTRUCTION MANUAL
FITTING & OPERATING INSTRUCTIONS
DT20 PROGRAMMER
MAINTENANCE & SPARES
06490040001 Rev B
set?
OK
off
ti ed
once
on
off
ti ed
once
on
heating hot water
select select
advance advance
MON TUE WED THU FRI SAT SUN
CLOCK? PROG? DATE? HDAY?
AM OFF
CHW ON
Maintenance:
The programmer req ires no
maintenance
The o ter casing can be wiped
clean sing a dry cloth, do not se
polish or detergents
Servicing:
This nit cannot be serviced.
Sho ld the existing nit fail to
f nction correctly, check that the
times and program settings are
correct.
Replacement Parts:
DT20 programmer replacement part
n mber: 8-716-106-665-0
set?
OK
off
ti ed
once
on
off
ti ed
once
on
heating hot water
select select
advance advance
MON TUE WED THU FRI SAT SUN
CLOCK? PROG? DATE? HDAY?
AM OFF
CHW ON
set?
OK
off
ti ed
once
on
off
ti ed
once
on
heating hot water
select select
advance advance
MON TUE WED THU FRI SAT SUN
CLOCK? PROG? DATE? HDAY?
AM OFF
CHW ON

SERVICING
& SPARES
USER
INSTRUCTIONS
INSTALLATION &
COMMISSIONING
ACCESSORY
INFORMATION CONTENTS
1
CONTENTS
FITTING & OPERATING INSTRUCTIONS FOR WORCESTER BOSCH
TWIN CHANNEL DT20 PROGRAMMER
8-716-106-647 iss e b (11.04) UK
USER
INSTRUCTIONS
12 SETTING THE CLOCK FITTING & OPERATING INSTRUCTIONS FOR WORCESTER BOSCH
TWIN CHANNEL DT20 PROGRAMMER
8-716-106-647 iss e b (11.04) UK
ACCESSORY INFORMATION
GENERAL INFORMATION 2
TECHNICAL DATA 3
INSTALLATION & COMMISSIONING
FITTING THE DT20 4
USER INSTRUCTIONS
OPERATING CONTROLS 5
PRESET PROGRAMS 6
SETTING PROGRAMS
Setting CH Mon-Fri  Setting HW Mon-Fri 7
Setting individ al weekdays 8
Setting CH Sat-S n  Setting HW Sat-S n 9
Setting individ al weekend days 10
SETTING HOLIDAYS 11
SETTING THE CLOCK 12
SETTING THE DATE 13
SERVICING & SPARES
MAINTENANCE & SPARES 14
CONTENTS
SETTING THE CLOCK
1 Press the 'set?' b tton ntil SET &
'CLOCK?' are shown in the display
2 Press 'OK' displays '24hr' & 'ON'
3 Press + to toggle between 24hr
and 12hr display
4 Press 'set?' to set the clock and the
ho rs flash on the display
5 Press + or - to correct ho r
Note: speed up the display by holding
down the + or - buttons.
6 Press the set? b tton to set the
correct ho r
7 Press + or - to correct min tes
8 Press the set? b tton to set the
correct min tes. SET & DATE?
appears in the display.
Note: if the day displayed is incorrect
the date needs resetting. To change
the date see SETTIN THE DATE.
If you do not wish to change the date,
press set? to return to normal display.
1
4
8
77
6
55
2
33

ACCESSORY
INFORMATION
2GENERAL INFORMATION FITTING & OPERATING INSTRUCTIONS FOR WORCESTER BOSCH
TWIN CHANNEL DT20 PROGRAMMER
8-716-106-647 iss e b (11.04) UK
USER
INSTRUCTIONS
11
SETTING HOLIDAYS
FITTING & OPERATING INSTRUCTIONS FOR WORCESTER BOSCH
TWIN CHANNEL DT20 PROGRAMMER
8-716-106-647 iss e b (11.04) UK
STANDARD PACKAGE:
A - Programmer
B - Instr ctions
SPECIFICATIONS:
Twin channel programmer for CH &
DHW mo nted into the boiler fascia
7 day programmer
3 on/off periods per day
A tomatic BST settings
Pre-programmed on/off periods
Dedicated advance b ttons
12 or 24 ho r back-lit digital display
Holiday f nction
Pre-wired with PCB connector
GENERAL INFORMATION SETTING HOLIDAYS
set?
OK
off
ti ed
once
on
off
ti ed
once
on
heating hot water
select select
advance advance
MON TUE WED THU FRI SAT SUN
CLOCK? PROG? DATE? HDAY?
AM OFF
CHW ON
1 Press the 'set?' b tton ntil 'SET' &
'HDAY?' is displayed
2 Press 'OK' the display shows 00
3 Press '+' & '-' to set the n mber of
days yo req ire the system to be
off
4 Press 'set?' then 'HDAY' is shown
in the display and no demand for
heating will be made from the
programmer.
The program will ret rn to normal
after the set n mber of days.
To cancel the holiday setting and
ret rn to normal operation, press any
b tton.
Note: the programmer counts each
pass through midnight as a day.
For example, if you don't want the
heating on from Saturday morning until
Tuesday morning, set for 3 days.
A
B
1
33
4
2

ACCESSORY
NFORMATION
3
TECHNICAL DATA
FITTING & OPERATING INSTRUCTIONS FOR WORCESTER BOSCH
TWIN CHANNEL DT20 PROGRAMMER
8-716-106-647 iss e b (11.04) UK
USER
INSTRUCTIONS
10 SETTING PROGRAMS FITTING & OPERATING INSTRUCTIONS FOR WORCESTER BOSCH
TWIN CHANNEL DT20 PROGRAMMER
8-716-106-647 iss e b (11.04) UK
DESCRIPTION UNITS DT20
TECHNICAL DATA
Dimensions mm -
Electrical s pply - 24v DC <65mA
Ambient operating temperat re C 0 to +50
H midity operating range % non-condensing p to 45° 30 - 95
Class of protection - II
Degree of protection IP 20
Acc racy @ 25°C sec/day <±1
Battery life years 10
Battery back p time & date years min. 10
Shortest switching period min tes 1
DHW & CH On/Off periods n mber 3
DHW & CH Programs days 7
Related Standards:
BS EN60730-1:2001
BS EN60730-2-7:1992
Electro Magnetic Compatibility and Radio Spectr m Matters (ERM); Short Range Devices (SRD) ETSI
EN 300 220-1
EC Directives:
E ropean Union Law Directive 2000/84/EC
Low Voltage Directive (73/23/EEC)
Electro Magnetic Compatibility Directive (89/336/EEC)
CE Marking Directive (93/68/EEC)
SETTING PROGRAMS
Setting individual weekend days:
Note: if you do not require individual
weekend times, then press set? until
normal display is shown.
If yo do not wish to change the
settings for 'SAT', then press 'set?'
to move to 'SUN'
Setting CH individual weekend
days:
1 Press 'OK' to select day displayed
2 Press 'OK' to select CH
Note: speed up the display by holding
down the + or - buttons.
3 Press + or - to change the ON
time
4 Press set? to set the ON time and
select the OFF time
5 Press + or - 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.
Note: after pressing set? for the 3rd
CH OFF time the display shows SET
HW for that day
Setting HW individual weekend
days:
7 Press OK to select the first ON time
Repeat operations 3 to 6 to set the
1st, 2nd and 3rd HW ON/OFF times.
Press 'set?' ntil the display ret rns
to normal mode.
3rd CH OFF
1
2
6
55
33
4
7

INSTALLATION &
COMMISSIONING
4FITTING THE DT20 FITTING & OPERATING INSTRUCTIONS FOR WORCESTER BOSCH
TWIN CHANNEL DT20 PROGRAMMER
8-716-106-647 iss e b (11.04) UK
USER
INSTRUCTIONS
9
SETTING PROGRAMS
FITTING & OPERATING INSTRUCTIONS FOR WORCESTER BOSCH
TWIN CHANNEL DT20 PROGRAMMER
8-716-106-647 iss e b (11.04) UK
DANGER - 24V &
230V: DO NOT TOUCH
THE ELECTRICAL
COMPONENTS OR
CIRCUITS.
FITTING THE DT20
CAUTION: ISOLATE THE MAINS
ELECTRICITY SUPPLY BEFORE
STARTING ANY WORK AND
OBSERVE ALL RELEVANT
SAFETY PRECAUTIONS.
I portant: Switch off boiler
Remove boiler o ter casing and
control panel fascia to gain access
to the heatronic control panel
1Release sec ring screw (A)
2P ll cover panel (B) pwards to
remove
3Grip tab (C), p ll pwards to
disengage clips (D) and p ll
forwards to remove blanking plate
(E) or existing programmer
4Align connector pins (F) into
receptors (G) in the pcb and p sh
f lly home
5Feed the ribbon cable (G) into
recess (H)
6Align programmer (E) and locate
clips (D), p sh into slots then
downwards to sec re sing grip
tab (C)
7Locate cover panel (B) and sec re
with screw (A)
Replace fascia cover and o ter
casing before switching on the
electricity s pply and boiler
Switch boiler on when completed.
Refer to USERS INSTRUCTIONS
section for details of pre-set and
setting programs.
OBSERVE ELECTRONIC STATIC
DISCHARGE PRECAUTIONS.
DO NOT TOUCH THE PCB
CIRCUITS
SETTING PROGRAMS
1
AB
D
E
C
2
3
F
E
4
AB
D
7
H
G
Setting CH SAT - SUN:
1 Press 'OK' to select weekend
2 Press 'OK' to select CH
Note: speed up the display by holding
down the + or - buttons.
3 Press + or - to change the ON
time
4 Press set? to set the ON time and
select the OFF time
5 Press + or - 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.
Note: after pressing set? for the 3rd
CH OFF time the display shows SET
HW for that weekday
Setting HW SAT - SUN:
7 Press OK to select the first ON time
Repeat operations 3 to 6 to set the
1st, 2nd and 3rd HW ON/OFF times.
Note: after pressing set? for the 3rd
HW OFF time the display shows SET
SAT, see next page.
If you do not require individual
weekend times, then press SET? until
the normal display is resumed.
3rd CH OFF
6
E
C
5
1
2
6
55
33
4
7

5
OPERATING CONTROLS
FITTING & OPERATING INSTRUCTIONS FOR WORCESTER BOSCH
TWIN CHANNEL DT20 PROGRAMMER
8-716-106-647 iss e b (11.04) UK
USER
INSTRUCTIONS
USER
INSTRUCTIONS
8SETTING PROGRAMS FITTING & OPERATING INSTRUCTIONS FOR WORCESTER BOSCH
TWIN CHANNEL DT20 PROGRAMMER
8-716-106-647 iss e b (11.04) UK
OPERATING CONTROLSSETTING PROGRAMS
Central heating:
1Press 'select' b tton to choose:
off = constantly OFF
ti ed = p to 3 ON and 3 OFF
time periods as program
once = ON from 1st ON ntil 3rd
OFF time period as program
on = constantly ON
2Press 'advance' b tton:
ON = heating light on (heating stays
on ntil the next OFF time period)
OFF = heating light off (heating stays
off ntil the next ON time period)
Note: 'advance' will not function with
constant on or off selected.
Hot Water:
1Press 'select' b tton to choose:
off = constantly OFF
ti ed = p to 3 ON and 3 OFF
time periods as program
once = ON from 1st ON ntil 3rd
OFF time period as program
on = constantly ON
2Press 'advance' b tton:
ON = hot water light on (hot water
stays on ntil the next OFF time period)
OFF = hot water light off (hot water
stays off ntil the next ON time period)
Note: 'advance' will not function with
constant on or off selected.
3rd CH OFF
Setting individual weekdays:
Note: if you do not require individual
weekday times, then press set? until
SET SAT-SUN are displayed and
continue on the next page.
If yo do not wish to change the
settings for the day displayed, then
press 'set?' ntil the first day yo
want to change is displayed
Setting CH individual weekdays:
1 Press 'OK' to select weekday
2 Press 'OK' to select CH
Note: speed up the display by holding
down the + or - buttons.
3 Press + or - to change the ON
time
4 Press set? to set the ON time and
select the OFF time
5 Press + or - 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.
Note: after pressing set? for the 3rd
CH OFF time the display shows SET
HW for that weekday
Setting HW individual weekdays:
7 Press OK to select the first ON time
Repeat operations 3 to 6 to set the
1st, 2nd and 3rd HW ON/OFF times.
Note: after pressing set? for the 3rd
HW OFF time SET and the next
weekday are displayed shown . . . after
completing the steps above for FRI
the display shows SET SAT SUN
(see next page)
2
1
1
2
1
2
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USER
INSTRUCTIONS
6PRE-SET PROGRAMS FITTING & OPERATING INSTRUCTIONS FOR WORCESTER BOSCH
TWIN CHANNEL DT20 PROGRAMMER
8-716-106-647 iss e b (11.04) UK
USER
INSTRUCTIONS
7
SETTING PROGRAMS
FITTING & OPERATING INSTRUCTIONS FOR WORCESTER BOSCH
TWIN CHANNEL DT20 PROGRAMMER
8-716-106-647 iss e b (11.04) UK
PRE-SET PROGRAMS SETTING PROGRAMS
1st 1st 2nd 2nd 3rd 3rd
ON OFF ON OFF ON OFF
Central Heating:
MON to FRI
Time 6:30 8:30 12:00 12:00 16:30 22:30
SAT & SUN
Time 7:00 9:00 12:00 12:00 16:00 23:00
Hot Water:
MON to FRI
Time 6:30 8:30 12:00 12:00 16:30 22:30
SAT & SUN
Time 7:00 9:00 12:00 12:00 16:00 23:00
If you need to restore the factory
pre-set program times then:
1Press the '-' and '+' b ttons
together to restore the defa lt
program times to those shown in
the table opposite.
The defa lt ON/OFF periods pre-
programmed for CH and DHW are
shown in the table opposite.
Note: two ON/OFF periods can be
used instead of 3 by setting the 2nd
ON & OFF periods to 12.00 as
shown in the default program table.
One ON/OFF period can be
achieved by setting the 2nd and 3rd
ON & OFF periods to the same time.
Note: The clock ti e is pre-
progra ed and should not
require adjust ent.
See 'SETTIN PRO RAMS' in the
USER INSTRUCTIONS section if
changes are required to the clock
time or pre-programmed settings.
Note: if you require different ON/OFF
times during the week, see Setting
individual days
Setting CH MON - FRI:
1 Press 'set?' ntil SET & 'PROG?'
are shown in the display
2 Press 'OK' to enter program
3 Press 'OK' to select MON-FRI
4 Press 'OK' to select CH
Note: speed up the display by holding
down the + or - buttons.
5 Press + or - to change the ON
time
6 Press set? to set the ON time and
select the OFF time
7 Press + or - 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.
Note: after pressing set? for the 3rd
CH OFF time the display shows SET
HW MON-FRI
Setting HW MON - FRI
9 Press OK to select the first ON time
Repeat operations 5 to 8 to set the
1st, 2nd and 3rd HW ON/OFF times.
Note: after pressing set? for the 3rd
HW OFF time the display shows SET
MON . . . see next page
11
1
3
4
8
77
55
6
3rd CH OFF
9
2