Worcester DT20 - Installation and Commissioning; Fitting the DT20 Programmer; Setting Weekend Programs (CH;HW)

INSTALLATION &
COMMISSIONING
4
FITTING THE DT20
FITTING & OPERATING INSTRUCTIONS FOR WORCESTER BOSCH
TWIN CHANNEL DT20 PROGRAMMER
8-716-106-647 issue b (11.04) UK
USER
INSTRUCTIONS
9
SETTING PROGRAMS
FITTING & OPERATING INSTRUCTIONS FOR WORCESTER BOSCH
TWIN CHANNEL DT20 PROGRAMMER
8-716-106-647 issue 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.
Important: Switch off boiler
Remove boiler outer casing and
control panel fascia to gain access
to the heatronic control panel
1 Release securing screw (A)
2 Pull cover panel (B) upwards to
remove
3 Grip tab (C), pull upwards to
disengage clips (D) and pull
forwards to remove blanking plate
(E) or existing programmer
4 Align connector pins (F) into
receptors (G) in the pcb and push
fully home
5 Feed the ribbon cable (G) into
recess (H)
6 Align programmer (E) and locate
clips (D), push into slots then
downwards to secure using grip
tab (C)
7 Locate cover panel (B) and secure
with screw (A)
Replace fascia cover and outer
casing before switching on the
electricity supply 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
A
B
D
E
C
2
3
F
E
4
A
B
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