Worcester DIGISTAT User manual

INS T R U CTION MANUA L
O P ER AT I NG & INS TA LL AT I O N
DT20RF PROGRAMMER
DIGISTAT - Radio frequency controlled room thermostat
with twin channel digital programmer
FOR GREENSTAR CDi, GREENSTAR i JUNIOR and GREENSTAR Si MODELS
ALSO GREENSTAR i SYSTEM AND GREENSTAR CDi SYSTEM (ONLY WHEN
USED IN CONJUNCTION WITH OPTIONAL INTEGRAL DIVERTER VALVE
For latest prices and delivery to your door visit MyTub Ltd - www.mytub.co.uk - [email protected] 0844 556 1818

MANUAL INFORMATION
PLEASE READ THESE INSTRUCTIONS
CAREFULLY BEFORE STARTING
THESE INSTRUCTIONS ARE APPLICABLE TO
THE WORCESTER BOSCH MODEL(S) STAT-
ED ON THE FRONT COVER OF THIS MANUAL
ONLY AND MUST NOT BE USED WITH ANY
OTHER MAKE OR MODEL
THESE INSTRUCTIONS APPLY IN THE UK
ONLY AND SHOULD BE FOLLOWED EXCEPT
FOR ANY STATUTORY OBLIGATION
IF YOU ARE IN ANY DOUBT CONTACT
WORCESTER BOSCH TECHNICAL
HELPLINE
THIS ACCESSORY MUST BE FITTED BY A
COMPETENT PERSON. FAILURE TO COMPLY
COULD LEAD TO PROSECUTION.
LEAVE THESE INSTRUCTIONS WITH THE
USER OR AT THE APPLIANCE.
ABBREVIATIONS
CH = Central Heating
DHW =Domestic Hot Water
RF = Radio Frequency
DLS = Daylight Saving
BST = British Summer Time
GMT =Greenwich Mean Time
C = Celsius (Centigrade)
IP = Ingress Protection
V = Volt
m = metre
mA =milliAmpere
DEFINITIONS (DLS/BST)
Summer period begins: Last Sunday in March at
1:00 am GMT (Clocks are put forward by 1 hour)
Summer period ends: Last Sunday in October at
2:00 am BST (Clocks put back 1 hour)
WORCESTER, BOSCH GROUP:
TECHNICAL 08705 266241
SERVICE 08547 256206
SPARES 01905 752571
LITERATURE 01905 752556
TRAINING 01905 752526
SALES 01905 752640
WEBSITE worcester-bosch.co.uk
SYMBOLS
Central Heating
Domestic Hot Water
Radio Frequency (RF) Transmitter
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TABLE OF CONTENTS
DT20RF PROGRAMMER
INSTRUCTION MANUAL
8 716 114 478a (08.07)
OPER AT I NG & INSTA L L AT I ON
INST R UCT IONS 1
TECHNICAL DATA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
DIGISTAT ROOM THERMOSTAT . . . . . . . . . . . . . . . . . . . . . . . . . . .3
GENERAL INFORMATION . . . . . . . . . . . . . . . . . . . . . . . . . . .3
ADVANCED SETTINGS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
DT20RF RECEIVER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
GENERAL INFORMATION . . . . . . . . . . . . . . . . . . . . . . . . . .6
OPERATIONAL CONTROLS . . . . . . . . . . . . . . . . . . . . . . . .7
PRE-PROGRAMMED SETTINGS . . . . . . . . . . . . . . . . . . . .8
PROGRAMMABLE SETTINGS . . . . . . . . . . . . . . . . . . . . . .9
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
SETTING RF LINK . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17
MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18
For latest prices and delivery to your door visit MyTub Ltd - www.mytub.co.uk - [email protected] 0844 556 1818

EC Directives:
European Union Law Directive 2000/84/EC
Low Voltage Directive (2006/95/EEC)
Electro-Magnetic Compatibility Directive (89/336/EEC)
EC Marking Directive (93/68/EEC)
STANDARD PACKAGE:
Programmable / RF receiver
Remote RF transmitter
Screws (x2)
Wall Plugs (x2)
Instructions
Batteries AA Alkaline(x2)
TECHNICAL DATA
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INST R UCT IONS
DT20RF PROGRAMMER
INSTRUCTION MANUAL
8 716 114 478a (08.07)
DIGISTAT TRANSMITTER
ROOM THERMOSTAT
DT20RF RECEIVER
Power supply 2xAA 1.5V alkaline batteries 24Vd.c. less than 65mA
Radio frequency 433 MHz 433 MHz
Radio signal range The range may be affected by the composition / density and
number of walls between the Digistat RF and receiver.
30 metres typically, through two internal plasterboard walls and a ceiling.
26 metres typically, through three internal plasterboard walls and a ceiling.
17 metres typically, through two internal plasterboard walls a ceiling and
one external cavity wall.
These distances are provided for guidance only, many factors can affect
the range of the transmitter, including metal pipework, appliances and
even furniture.
Temperature setting range 5°C to 30°C 5°C to 30°C
Control Accuracy: + 0.5°C @ 20°C better than ±1 second per day @ 25°C
Ambient Temperature:
Operating 0°C to 50°C 0 to 50°C
Ambient Temperature:
Storage –20°C to 55°C --
Humidity operating range -- 30 - 95 % non condensing up to 45°C
Mounting: Suitable for surface mounting
RF: No wiring required
DHW & CH ON/OFF periods -- 3 ON / 3 OFF
DHW & CH programs 7 days
Class of protection /
Degree of protection
IP30 IP24
Battery back up time & date 10 years minimum 10 years minimum
Shortest switching period 1 minute 1 minute
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What is a room thermostat?
A room thermostat simply switches the heating
system on and off as necessary. It works by sens-
ing the air temperature, switching on the heating
when the air temperature falls below the thermo-
stat setting, and switching it off once this set
temperature has been reached.
Turning a room thermostat to a higher setting will
not make the room heat up any faster. How
quickly the room heats up depends on the design
of the heating system, for example, the size of
boiler and radiators.
Neither does the setting affect how quickly the
room cools down. Turning a room thermostat to a
lower setting will result in the room being con-
trolled at a lower temperature, and saves energy.
The heating system will not work if a time switch
or programmer has switched it off.
The way to set and use your room thermostat is
to find the lowest temperature setting that you
are comfortable with, and then leave it alone to
do its job. The best way to do this is to set the
room thermostat to a low temperature, at say
18°C and then turn it up by one degree each day
until you are comfortable with the temperature.
You won’t have to adjust the thermostat further.
Any adjustment above this setting will waste
energy.
If your heating system is a boiler with radiators,
there will usually be only one room thermostat to
control the whole house. But you can have differ-
ent temperatures in individual rooms by installing
thermostatic radiator valves (TRVs) on individual
radiators. If you don’t have TRVs, you should
choose a temperature that is reasonable for the
whole house. If you do have TRVs, you can
choose a slightly higher setting to make sure that
even the coldest room is comfortable, then pre-
vent any overheating in other rooms by adjusting
the TRVs.
Room thermostats need a free flow of air to
sense the temperature, so they must not be cov-
ered by curtains or blocked by furniture. Nearby
fires, televisions, wall or table lamps may prevent
the thermostat from working properly.
FEATURES
The Digistat RF room thermostat has the following
user settings:
• Required room temperature (temperature set-
point)
• Preset temperature setting - Advanced feature
• Minimum & Maximum temperature settings -
Advanced feature
Simple Setting or Operating
To set the required room temperature
• The display normally shows the current room
temperature to within 0.5°C
• To adjust the required temperature, turn the
dial clockwise to increase or anti-clockwise to
decrease, (1 click = 1°C), the LCD will display
the temperature setpoint as it is being adjusted
and ‘SET’ will be displayed. After a few seconds
the display will return to normal operation and
will display the actual room temperature.
While adjusting the temperature during normal
operation, when you reach the maximum or
minimum possible setting the display will flash to
indicate you cannot adjust the product further.
3
DIGISTAT ROOM THERMOSTAT
GENERAL INFORMATION
DT20RF PROGRAMMER
INSTRUCTION MANUAL
8 716 114 478a (08.07)
OPER AT I NG & INSTA L L AT I ON
INST R UCT IONS
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ADVANCED FEATURES
Adjusting the Setpoint using the Preset
Temperature Mode
Change the temperature at the press of a button,
for example, if you are going out to the shops for
an hour you can reduce the temperature to save
energy and then when you press the button again
on your return the setpoint will return to the previ-
ous level.
• To adjust the setpoint to the preset (or Setback)
temperature, press the Set button during normal
operation and the product will go into Preset
mode.
NOTE:
This feature can be used to quickly adjust the tem-
perature setpoint to a setback temperature for
economy operation if for example, “Preset
Temperature = 15°C”. Or alternatively to a comfort
setpoint if “Preset Temperature = 21°C”.
• Once the setpoint has been changed to the pre-
set (or setback) temperature by pressing Set the
display will show the “Preset Temperature” and
SET will be flashing in the display as shown,
SET will flash for approximately 5 seconds and
during this time the “Preset Temperature” can be
altered by rotating the dial.
• The product will remain in the Preset mode. Once
5 seconds have elapsed (since the last dial
adjustment) the word SET will stop flashing on
the display as shown,
The product is still in the Preset mode.
To cancel the Preset Mode & return to normal
operation
You can either,
1. If you want to return to your previous setpoint
(before you entered the Preset mode) then press
the SET button. The Preset mode will be can-
celled and the product will return to normal oper-
ation and the display will show the current room
temperature as shown.
2. If you want to set a new setpoint, just rotate the
dial until your required setpoint is shown on the
display. After a couple of seconds the display will
change to show the current room temperature as
shown.
To change the user adjustable settings
• To enter the User menu, press and hold the Set
button for more than 5 but less than 10 seconds
the display will show Pr (Preset temperature
setting) as shown.
• If the dial is turned clockwise one click then HI
(Maximum temperature setting) will be displayed
and if turned one more click clockwise then Lo
(Minimum temperature setting) will be displayed.
Changing the Preset Temperature
• To adjust the “Preset” temperature enter the user
menu as described above, then rotate the dial
until Pr is shown, press the set button and the
display will show the current Preset setting.
• Rotate the dial clockwise to increase the Preset
temperature & anti-clockwise to reduce the
Preset temperature. Press the Set button to con-
firm and Pr will be displayed.
4
DIGISTAT ROOM THERMOSTAT
ADVANCED SETTING
DT20RF PROGRAMMER
INSTRUCTION MANUAL
8 716 114 478a (08.07)
OPER AT I NG & INSTA L L AT I ON
INST R UCT IONS
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Changing the Maximum Temperature Setting
• To adjust the maximum temperature setting enter
the user menu as described above, then rotate
the dial clockwise until ‘HI’ is showing.
• Then press the Set button, the current setting is
shown.
• Rotate the dial clockwise to increase the maxi-
mum temperature setting (max. 30°C) and anti-
clockwise to reduce the maximum temperature
setting (min. 5°C or min. temp. setting). Press
the Set button to confirm, the display will show.
Changing the Minimum Temperature Setting
• To adjust the minimum temperature setting enter
the user menu as described above, then rotate
the dial clockwise until Lo Is showing.
• Then press the Set button, the current setting is
shown.
• Rotate the dial clockwise to increase the mini-
mum temperature setting (max. 30°C or max.
temp. setting) and anti-clockwise to reduce the
minimum temperature setting (min. 5°C). Press
the Set button to confirm, the display will show.
When adjusting the settings within the menu, if the
maximum or minimum possible setting are reached,
the display will flash to indicate you cannot adjust
the product further, e.g. you cannot set the Preset
higher than the maximum temperature setting.
To return to normal operation, either press the Set
button for more than 5 seconds or wait for 1 minute
and it will return automatically.
TAMPER PROOFING (All Models)
To tamper proof the product i.e. prevent unautho-
rised adjustment of the product set the Min. and
Max. temperatures to the same desired value.
FAULT DIAGNOSIS (All Models)
If the display shows E1, the following faults could
have occurred:
1. Internal temperature sensor has failed.
Replace the unit,
2. Ambient temperature is outside product
operating temperature range - 0°C to 50°C.
When the ambient temperature is back within the
operating range, the unit will function correctly.
BATTERY REPLACEMENT (All Models)
• When the batteries are getting low (approx. 30
days battery life remaining) the battery symbol
will flash in the display, it is recommended to
change the batteries during this period.
• After approximately 30 days, a continuous battery
symbol only will be shown in the display and the
unit will remain OFF.
Remove the battery compartment by pinching the
tabs and withdrawing down. Replace the spent
batteries with 2 x AA 1.5V alkaline batteries ensur-
ing correct orientation. Replace the battery com-
partment pressing fully home.
5
DT20RF PROGRAMMER
INSTRUCTION MANUAL
8 716 114 478a (08.07)
OPER AT I NG & INSTA L L AT I ON
INST R UCT IONS
DIGISTAT ROOM THERMOSTAT
ADVANCED SETTING
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CENTRAL
HEATING
ON LIGHT
CENTRAL HEATING SELECT
BUTTON, MOVES THE INDICATOR
UP AND DOWN TO SELECT
MODE AND ACCEPTS CHANGES
CENTRAL HEATING ADVANCE BUTTON:
TURNS ON UNTIL NEXT OFF TIME
OR
TURNS OFF UNTIL NEXT ON TIME
PRESS TO ADJUST EACH
PROGRAM SETTING
PRE-HEAT SELECT BUTTON,
MOVES THE INDICATOR UP
AND DOWN TO SELECT MODE
AND ACCEPTS CHANGES
PRE-HEAT ADVANCE BUTTON:
TURNS ON UNTIL NEXT OFF TIME
OR
TURNS OFF UNTIL NEXT ON TIME
HOT WATER PRE-HEAT
MODE INDICATOR
CENTRAL HEATING
MODE INDICATOR
+ AND - CHANGES ON/OFF
PROGRAMMED TIMES
PRESS TO SELECT EACH SETTING:
DATE, TIME, PROGRAM AND
HOLIDAY FUNCTION
HOT WATER
PRE-HEAT
MODES
CENTRAL
HEATING
MODES
DT20RF RECEIVER
GENERAL INFORMATION
TIME AND DAY
INDICATION
}
{
6OPER AT I NG & INSTA L L AT ION
INST R UCT IONS
DT20RF PROGRAMMER
INSTRUCTION MANUAL
8 716 114 478a (08.07)
DT20RF Receiver Programmer
The Programmer has factory set programs for
ON/OFF periods for central heating and hot water
pre-heat, which are described on the following
pages.
These factory installed settings can be used with-
out any further programming.
This section also details how to program the
DT20RF Receiver for new weekday and weekend
times to suit your lifestyle requirements.
How to set the clock, time and date.
A holiday function is provided, the number of days
of your holiday can be set.
After that set time period the boiler will revert to
the normal program.
HOT WATER
PRE-HEAT
ON LIGHT
RF LINK
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Central heating:
1. Press selectbutton to
choose
off = constantly OFF
timed = up to 3 ON &
3 OFF time
periods as
program
once= ON from first ON
until third OFF
time period as
program
on = constantly ON
2. Press “advance” button:
ON = heating light on
(heating demand stays
on until next off time
period)
OFF = heating light off
(heating demand
stays off until next on
time period)
DT20RF RECEIVER
OPERATING CONTROLS
Hot Water:
3. Press selectbutton to
choose
off = constantly OFF
timed = up to 3 ON
and 3 OFF
time periods as
program
once= ON from first
ON until third
OFF time period
as program
on = constantly ON
4. Press “advance” button:
ON = hot water pre-heat
light on (hot water
stays on until next off
time period)
OFF = hot water pre-heat
light off (hot water
stays off until next on
time period)
NOTE: Advancehas no effect with constantly on
or off is selected on the receiver or when
there is no demand from the transmitter.
7
DT20RF PROGRAMMER
INSTRUCTION MANUAL
8 716 114 478a (08.07)
OPER AT I NG & INSTA L L AT I ON
INST R UCT IONS
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NOTE:
The ON/OFF periods pre-programmed for
Central Heating and Hot Water pre-heat are
shown in the table below.
These factory installed settings can be used
without any further programming of the
receiver.
The time and date are pre-programmed and
should not require adjustment.
If you need to restore the factory pre-set
program times then:
Press the + and - buttons together, for two
seconds or longer, to restore the default program
times to those shown in the table opposite.
NOTE:
Two ON/OFF periods can be used instead
of three, by setting the second ON/OFF
periods to 12:00 as shown in the default
program table.
One ON/OFF period can be achieved by
setting the second and third ON/OFF peri-
ods to the same times.
See DIGISTAT RECEIVER PROGRAMMABLE
SETTING on the next page, if changes are required
to the clock time or pre-programmed settings.
DT20RF RECEIVER
PRE-PROGRAMMED SETTINGS
8DT20RF PROGRAMMER
INSTRUCTION MANUAL
8 716 114 478a (08.07)
OPER AT I NG & INSTA L L AT I ON
INST R UCT IONS
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Setting Central Heating (CH) MON - FRI
1. Press set?until SET and 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 second and
third CH ON/OFF times.
NOTE: After pressing set?for the third CH OFF
time the display shows SET MON ...see
next page.
Setting Hot Water (HW) MON - FRI
9. Press OK to select the first ON time.
Repeat operations 5 to 8 to set the first, second
and third HW ON/OFF times.
NOTE: After pressing set?for the third HW OFF
time the display shows SET MON ...see
next page.
DT20RF RECEIVER
PROGRAMMABLE SETTINGS
9
DT20RF PROGRAMMER
INSTRUCTION MANUAL
8 716 114 478a (08.07)
OPER AT I NG & INSTA L L AT I ON
INST R UCT IONS
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Setting individual weekends:
NOTE: If you do not require individual weekday
times, then press set?until SET SUN-SAT
are displayed and continue on the next
page.
If you do not wish to change the setting for the day
displayed, then press set?until the first day you
want to change is displayed.
Setting Central Heating (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 second and
third ON/OFF times.
NOTE: After pressing set?for the third CH OFF
time, SET and HW for that weekday are
displayed.
Setting Hot Water (HW) individual weekdays:
7. Press OK to select the first ON time.
Repeat operations 3 to 6 to set the first, second
and third HW ON/OFF times.
NOTE: After pressing set?for the third HW OFF
time, SET and the next weekday are dis-
played....after completing the steps above
for FRI the display shows SET SAT-SUN.
see next page....
10
DT20RF RECEIVER
PROGRAMMABLE SETTINGS
DT20RF PROGRAMMER
INSTRUCTION MANUAL
8 716 114 478a (08.07)
OPER AT I NG & INSTA L L AT I ON
INST R UCT IONS
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Setting Central Heating (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 second and
third ON/OFF times.
NOTE: After pressing set?for the third CH OFF
time, SET and HW for the weekend are
displayed.
Setting Hot Water (HW) SAT - SUN:
7. Press OK to select the first ON time.
Repeat operations 3 to 6 to set the first, second
and third HW ON/OFF times.
NOTE: After pressing set?for the third HW OFF
time, SET and SAT are displayed....see next
page.
NOTE: If you do not require individual weekend day
times, then press set? until the normal dis-
play is seen.
11
DT20RF RECEIVER
PROGRAMMABLE SETTINGS
DT20RF PROGRAMMER
INSTRUCTION MANUAL
8 716 114 478a (08.07)
OPER AT I NG & INSTA L L AT I ON
INST R UCT IONS
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Setting individual weekend days:
NOTE: If you do not require individual weekend day
times, then press set? until the normal dis-
play is seen.
If you do not wish to change the settings for SAT,
then press set? to move to SUN.
Setting Central Heating (CH) individual week-
end days:
1. Press OK to select the 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 second and
third ON/OFF times.
NOTE: After pressing set?for the third CH OFF
time, SET and HW for that day are dis-
played.
Setting Hot Water (HW) individual
weekend days:
7. Press OK to select the first ON time.
Repeat operations 3 to 6 to set the first, second
and third HW ON/OFF times.
Pressing set?until the normal display is seen.
12
DT20RF RECEIVER
PROGRAMMABLE SETTINGS
DT20RF PROGRAMMER
INSTRUCTION MANUAL
8 716 114 478a (08.07)
OPER AT I NG & INSTA L L AT ION
INST R UCT IONS
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Setting holidays:
1. Press the set?button until SET and HDAY are
displayed.
2. Press OK and the display shows 00.
3. Press + or - to set the number of days you
require 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 return to normal after the set
number of days.
To cancel the holiday setting and return to normal
operation, press any button.
NOTE: The programmer counts each pass through
midnight as a day.
e.g. if you do not want heating from
Saturday morning until Tuesday morning,
set for three days.
13
DT20RF RECEIVER
PROGRAMMABLE SETTINGS
DT20RF PROGRAMMER
INSTRUCTION MANUAL
8 716 114 478a (08.07)
OPER AT I NG & INSTA L L AT I ON
INST R UCT IONS
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Setting the clock and time
1. Press the set?button until SET and CLOCK are
shown in the display.
2. Press OK to display 24hr and ON.
3. Press + to switch between 24hr and 12hr
display.
4. Decide between 24 hour or 12 hour display and
press set? to select, now the hours will flash.
5. Press + or - to set the correct hour.
NOTE: Speed up the display by holding down
the +or -buttons.
6. When the correct hour has been selected, press
set? to select, now the minutes will flash.
7. Press + or - to set the correct minutes.
8. When the correct minutes have been set, press
set?to select that setting.
Now SET and DATE will be displayed.
If the day and date needs resetting, refer to the
next page for SETTING THE DATE.
If the day and date are correct, press set?to
return to the normal display.
14
DT20RF RECEIVER
PROGRAMMABLE SETTINGS
DT20RF PROGRAMMER
INSTRUCTION MANUAL
8 716 114 478a (08.07)
OPER AT I NG & INSTA L L AT I ON
INST R UCT IONS
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Setting the date:
1. Press the set?button until SET and DATE? are
displayed.
2. Press the OK button once, the year flashes on
the display.
3. Press + or - to set the correct year, e.g. 07.
4. When the correct year has been chosen, press
set?to select, now the month will flash.
5. Press + or - to select the correct month, e.g. 08.
6. When the correct month has been chosen, press
set?to select, now the day will flash.
7. Press + or - to select the correct day, e.g. 16.
8. When the correct day has been chosen, press
set?to select, now dLS will be displayed and
ON will flash.
9. Press + or - to switch between ON or OFF.
If you choose ON then the clock will automatical-
ly adjust the time for Daylight saving. If you
choose OFF then the time will not change to
take account of the Daylight Saving time change
twice a year.
10. Press set?twice to return to the normal
display.
NOTE: dLS = Day Light Savings time
15
DT20RF RECEIVER
PROGRAMMABLE SETTINGS
DT20RF PROGRAMMER
INSTRUCTION MANUAL
8 716 114 478a (08.07)
OPER AT I NG & INSTA L L AT I ON
INST R UCT IONS
For latest prices and delivery to your door visit MyTub Ltd - www.mytub.co.uk - [email protected] 0844 556 1818

DANGER: 230 VOLTS
DO NOT TOUCH THE ELECTRICAL
COMPONENTS OR CIRCUITS
CAUTION:
ISOLATE THE MAINS ELECTRICITY
SUPPLY BEFORE STARTING ANY WORK
OBSERVE ALL RELEVANT SAFETY
PRECAUTIONS
OBSERVE ELECTRO-STATIC
DISCHARGE PRECAUTIONS:
DO NOT TOUCH THE PCB CIRCUIT
5. Align the connector plug pins into socket on the
PCB and push fully home.
6. Feed the ribbon cable into the recess.
7. Align the programmer and locate the clips, push
into the slots then down to secure.
8. Locate the cover panel in place and secure with
the screw.
9. Replace fascia cover and outer casing before
switching on the electrical supply and boiler.
Switch boiler on when completed.
Refer to the User Instructions section for details
of pre-set and setting programs.
DT20RF RECEIVER
INSTALLATION
16 DT20RF PROGRAMMER
INSTRUCTION MANUAL
8 716 114 478a (08.07)
OPER AT I NG & INSTA L L AT ION
INST R UCT IONS
1. Remove the boiler outer casing and control
panel fascia to gain access to the heatronic
control panel.
2. Release the securing screws.
3. Pull the cover panel up to remove.
4. Grip the tab and pull upwards to disengage
clips, pull forward to remove blanking plate or
existing programmer.
NOTE: THIS ACCESSORY MUST BE FITTED
BY A COMPETENT PERSON.
FAILURE TO COMPLY COULD LEAD TO
PROSECUTION.
For latest prices and delivery to your door visit MyTub Ltd - www.mytub.co.uk - [email protected] 0844 556 1818

Care should be taken to mount the thermostat in a
position which is not subject to direct sunlight or
draughts. Preferably it should be mounted on an
inside wall about 1.5m (5ft.) above the floor in a
position where it can respond to room temperature
but away from the direct influence of radiators or
other appliances giving off heat.
DIGISTAT ROOM THERMOSTAT
INSTALLATION
Receiver set up:
After initial start up, the colon, CH and antenna
symbols should be flashing on the display.
1. Press the set?button 4 times.
2. Press the OK button once.
3. Press the set?button 4 times; Lrn and OFF
should be displayed.
4. Press the + button so the display shows ON and
a flashing antenna symbol. The learn mode is now
ready to receive a signal from the transmitter dur-
ing the next two minutes.
Transmitter set up:
1. Take the Digistat Room Thermostat and stand
approximately two metres away from the boiler.
2. Remove the battery cover and fit the batteries.
The symbols on the receiver will stop flashing and
the display will return to the normal time display.
This confirms that the radio signal is being sent
and received.
The Digistat Room Thermostat is now linked to
the receiver on the boiler.
DT20RF RECEIVER
SETTING THE RF LINK
17
DT20RF PROGRAMMER
INSTRUCTION MANUAL
8 716 114 478a (08.07)
OPER AT I NG & INSTA L L AT I ON
INST R UCT IONS
NOTE: Refer to the Technical Data page for
guidance on Digistat transmitter range.
For latest prices and delivery to your door visit MyTub Ltd - www.mytub.co.uk - [email protected] 0844 556 1818

Maintenance:
The Digistat RF Room thermostat requires no
maintenance.
The outer casing can be wiped clean using a dry
cloth. DO NOT use polish or detergents.
These units can not be serviced.
Should the existing units fail to function correctly,
check that the:
DT20RF Receiver times and program settings
are correct.
RF signal link is set up (Refer to page 2 for
RF signal range details).
Digistat RF Room thermostat batteries are the
correct type, fitted correctly and are not
exhausted.
Fit new batteries if in doubt.
DIGISTAT/DT20RF RECEIVER
MAINTENANCE
18 DT20RF PROGRAMMER
INSTRUCTION MANUAL
8 716 114 478a (08.07)
OPER AT I NG & INSTA L L AT ION
INST R UCT IONS
DT20RF Receiver
part number 8 716 106 669 0
Digistat RF Room thermostat
part number 8 716 114 463 0
For latest prices and delivery to your door visit MyTub Ltd - www.mytub.co.uk - [email protected] 0844 556 1818