Viessmann Vitotronic 200 KW2 User manual

VITOTRONIC 200/300
Operating Instructions
Vitotronic 200,Model KW2
Part No. Z001 230
Vitotronic 300,Model KW3
Part No. Z001 231
Weather-responsive indoor/outdoor, digital boiler control
for heating systems with one or more heating circuits
Certified as a component part
of Viessmann boilers only
Vitotronic 200, Model KW2
Vitotronic 300, Model KW3
Read and save these instructions
for future reference.
IMPORTANT
1
5303 272 v1.3 01/2008

Safety Instructions
2
Safety, Installation and Warranty Requirements
Safety, Installation and Warranty Requirements
Please ensure that these instructions are read and understood before commencing installation and operation. Failure to comply with
the instructions listed below and details printed in these instructions can cause product / property damage,severe personal injury,
and / or loss of life. Ensure all requirements below are understood and fulfilled (including detailed information found in manual sub-
sections).
Licensed professional heating
contractor
The installation, adjustment, service,
and maintenance of this equipment
must be performed by a licensed profes-
sional heating contractor.
Please see sections
entitled “Safety” and
“Important Regulatory and
Installation Requirements”.
Product documentation
Read all applicable documentation be-
fore commencing installation. Store doc-
umentation near boiler in a readily ac-
cessible location for reference in the
future by service personnel.
For a listing of applicable
literature, please see
section entitled “Important
Regulatory and Installation
Requirements”.
Advice to owner
Once the installation work is complete,
the heating contractor must familiarize
the system operator / ultimate owner
with all equipment, as well as safety
precautions / requirements, shut-down
procedure, and the need for professional
service annually before the heating sea-
son begins.
Warranty
Information contained in this and related
product documentation must be read
and followed. Failuretodosorenders
warranty null and void.
Safety Terminology
The following terms are used throughout this manual to bring attention to the presence of potential hazards or important product
information. Please heed the advice given!
Helpful hints for installation, operation or
maintenance which pertain to the product.
5303 272 v1.3
Indicates an imminently hazardous
situation which, if not avoided, will
result in death, serious injury or
substantial product / property damage.
DANGER
Indicates an imminently hazardous
situation which, if not avoided, could
result in death, serious injury or
substantial product / property damage.
WARNING
Indicates an imminently hazardous
situation which, if not avoided, may
result in minor injury or product /
property damage.
CAUTION
IMPORTANT

Index
3
Page
Important Precautions Safety Instructions 2...................................................................
Useful Tips Introductory Information
About these instructions 4
........................................................
Tips on getting started 5............................................................
Heating systems - application examples 6...........................
Overview of controls and indicators 7...................................
Operating Instructions
(in brief)
Operating Instructions (in brief)
Operating controls / display elements 9
................................
Vitotronic control unit - factory default setting 9...............
Resetting time and date 10..........................................................
Language selection 10...................................................................
Selecting the heating circuit 11..................................................
Setting the heating program 11..................................................
Altering room temperature 12.....................................................
Setting the party mode / energy saving mode 13.................
Operating Instructions
(in detail)
Activating and Deactivating the Heating System
Activating the heating system 14
..............................................
Deactivating the heating system 14.........................................
Time Program for Central Heating
Altering the time program for central heating 15
.....................
DHW Production
Altering the time program
for domestic hot water production 17
......................................
Altering the DHW temperature 20.............................................
Altering the time program
for the DHW recirculation pump 21
..........................................
Holiday Program
Activating the holiday program 23
............................................
Other Settings
Scanning temperatures and operating status 24
...................
Altering settings of the heating system 25............................
Special displays 27.........................................................................
Emissions Inspection Emissions test switch 28.............................................................
Information Troubleshooting Guide
Diagnosis and correction 28
........................................................
Service instructions 30.................................................................
Saving energy 31............................................................................
5303 272 v1.3

4
About These Instructions
The following symbols and flag words are utilized in these
Installation Instructions:
Indicates an imminently hazardous sit-
uation which, if not avoided, could re-
sult in death, serious injury or sub-
stantial product / property damage.
Indicates an imminently hazardous sit-
uation which, if not avoided, may re-
sult in minor injury or product / prop-
erty damage.
Helpful hints for installation, operation
or maintenance which pertain to the
product.
This symbol indicates that additional,
pertinent information is to be found in
column three.
This symbol indicates that other
instructions must be referenced.
5303 272 v1.3
Warnings draw your attention to the
presence of potential hazards or
important product information.
WARNING
Cautions draw your attention to the
presence of potential hazards or
important product information.
CAUTION
IMPORTANT

Introductory Information
5
Tips on Getting Started
Your heating system provides central heating and domestic hot water heating in
conjunction with a domestic hot water tank.
The timer of the control unit switches over between ”normal room temperature”
and ”reduced room temperature” at the required times.
1. Normal room temperature
for the times you spend at home and
require a comfortably warm room
temperature (e.g. 68 ºF / 20 ºC).
2. Reduced room temperature
at nighttime or for the times you
spend away from home. To save
energy, a temperature which is lower
than the ”normal room temperature”
is normally selected.
In the factory setting, ”frost
protection at 37 ºF / 3 ºC” is
selected.
Times and duration of the two room
temperatures can be set via the
programming unit.
You can set the required temperature
value for both the ”normal room tem-
perature” and the ”reduced room tem-
perature”.
The timer of the control unit activates and deactivates the domestic hot water
supply at the required times (applicable to boiler with domestic hot water tank
only).
1. Domestic hot water heating takes
place
for the times you spend at home and
require hot water for your daily
requirements (e.g. for showering).
2. Domestic hot water heating does not
take place
at nighttime for example.
Times and duration of domestic hot water
heating can be set via the programming
unit.
The domestic hot water temperature
can be set according to your personal
preference up to 140 ºF / 60 ºC.
The DHW recirculation pump (if
installed) ensures instantaneous avail-
ability of hot water.
5303 272 v1.3
IMPORTANT
IMPORTANT

Introductory Information
6
Heating Systems - Application Examples
Please ask your heating contractor to make an X in the appropriate box.
jSystem type 1
Boiler with one heating circuit 1
without mixing valve
optionally with
jVitotronic 200
jor
jVitotronic 300
jDomestic hot water tank
jDHW recirculation pump
jVitotrol remote control
jSystem type 2
Boiler with one heating circuit 2
with mixing valve
optionally with
jVitotronic 200
jor
jVitotronic 300
jDomestic hot water tank
jDHW recirculation pump
jVitotrol remote control
jSystem type 3
Boiler with one heating circuit 1
without mixing valve and one heating
circuit 2 with mixing valve
optionally with
jVitotronic 200
jor
jVitotronic 300
jDomestic hot water tank
jDHW recirculation pump
jVitotrol remote control
jSystem type 4
Boiler with two heating circuits with
mixing valve
(heating circuit 2 with mixing valve
, heating circuit 3 with mixing
valve )
optionally with
jVitotronic 300
jDomestic hot water tank
jDHW recirculation pump
jVitotrol remote control
jSystem type 5
Boiler with one heating circuit 1
without mixing valve and two heating
circuits with mixing valve
(heating circuit 2 with mixing valve ,
heating circuit 3 with mixing valve )
optionally with
jVitotronic 300
jDomestic hot water tank
jDHW recirculation pump
jVitotrol remote control
5303 272 v1.3

Introductory Information
Boiler temperature
Boiler temperature
7
Overview of Controls and Indicators (with hinged covers open)
Heating circuit switches, only and on
Vitotronic 200
Display
Setpoint selector for ”normal room temperature”
Heating program settings
Energy saving mode on / off
Party mode on / off
Heating system on / off switch
Fuse
Fixed high limit reset button
Adjustable high limit
TUV service button (for service purposes only)
Emissions test switch
Operating status display (green)
Fault display (red)
Time program for central heating
Time program for domestic hot water heating
Time program for DHW recirculation pump
Holiday program
Adjustment buttons
Information
Confirmation button
Factory default settings button
Domestic hot water temperature
Reduced room temperature
Time / date
Heating curve shift
Heating curve slope
5303 272 v1.3

Introductory Information
8
Overview of Controls and Indicators (with hinged covers open)
Other display symbols
(These appear in the bottom line of the
display)
Risk of freezing
Central heating with normal room
temperature
Central heating with reduced
room temperature
ep
sp
mp Heating circuit pump running
YMixing al e ”Open”
BMixing al e ”Closed”
DHW pump ON
wpTank primary pump running,
DHW is being heated
pDHW heating ia solar heating
system
Heating circuit pump ON
Burner ON
uTime adjustment display
SEmissions test ON
Contrast adjustment
Open the hinged co er on the
programming unit, press and, at the
same time, adjust the contrast with the
or button.
Factory default settings
Press this button to reset altered alues
to their factory default settings. Please
note that this action will reset all
pre iously altered alues to the original
factory default settings.
Data flashing in the display means that
new settings can be entered.
5303 272 1.3
IMPORTANT

Operating Instructions (in brief)
9
Operating Controls / Display Elements
All settings of your heating system are centralized on the control unit and on the
built-in programming unit.
If your system is equipped with a remote control, the settings can also be made on
the remote control unit.
See Operating Instructions
for remote control
Please refer also to the section headed ”Special Displays” in these instructions.
The programming unit is arranged in a drawer-type compartment.
Pull the unit forward, swing it up and lock it in a convenient position to read the
datashowninthedisplay.
AProgramming unit
BProgramming unit flap
CHinged cover
DAbridged operating instructions
Vitotronic Control Unit - Factory Default Setting
The control unit comes factory adjusted to a standard operating mode.
Your heating system is therefore ready for operation. You can change the factory
default settings to suit your individual preferences.
Date and time (EST)
Date and time are factory preset and
are maintained through the built-in
long-life battery. For changes due to
different time zones, please refer to the
following page.
Resetting for daylight savings time
takes place automatically, depending on
settings for day / week / month.
Heating program
The heating program is set for ”Central
heating and domestic hot water”, i.e.
central heating and domestic hot water
heating take place in accordance with
thetimeprograms.
Time programs
Between 06:00 and 22:00 hrs, central
heating takes place with the normal room
temperature and, between 05:30 and
22:00 hrs, domestic hot water heating (if
a DHW tank is installed).
Frostprotection(37ºF/3ºC)isprovided
between 22:00 and 06:00 hrs.
5303 272 v1.3
A
DC
CB

Operating Instructions (in brief)
10
Resetting Time and Date
The time and date are preset at the factory and can be changed manually.
Time
DDate
Th
1. Open the hinged cover on the
programming unit.
2. for ”Time”.
3. /to enter the time.
4. to confirm;
the date is displayed.
5. /to enter the date.
Press and hold to scroll
through day, month and
year.
6. to confirm.
7. Close the hinged cover on the
programming unit.
Language Selection
Outdoor temperature
iºC
English
i
1. Open the hinged cover on the
programming unit.
2. to scan data;
the outdoor temperature is
displayed.
3. until the required language
appears.
4. to confirm;
the display changes and
shows the boiler water
temperature.
5. Close the hinged cover on the
programming unit.
5303 272 v1.3

Operating Instructions (in brief)
11
Selecting the Heating Circuit
On heating systems with two or three heating circuits, the corresponding heating
circuit must be selected before making settings and adjustments.
Heating circuit 1: Heating circuit 1 without mixing valve
Heating circuit 2: Heating circuit 2 with mixing valve
Heating circuit 3: Heating circuit 3 with mixing valve (only
on Vitotronic 300)
The heating circuits are individually labelled by your heating contractor.
Press or or ; the corresponding
button is lit. You can now make the
settings and adjustments for the
selected heating circuit.
If this is not done, the following
instruction appears in display: ”Select
button 1-2” or button ”1-3”.
Setting the Heating Program
Select one of the heating programs according to your personal requirements.
After pressing the corresponding button, the display over the button will light up;
the selected heating program appears in the display window for a short time.
Central heating and domestic hot water
Central heating with alternating
normal and reduced room tempera-
ture (frost protection) according to
the selected time program
Domestic hot water supply (if a DHW
tank is installed) and DHW recircu-
lation pump (if installed) ON
Frost protection of the heating
system
Domestic hot water only
No central heating
Domestic hot water supply (if a DHW
tank is installed) and DHW recircu-
lation pump (if installed) according to
the selected time program
Frost protection of the heating
system
Stand-by operation
No central heating
No domestic hot water supply
Frost protection of the heating
system
e.g. for winter and transitional
periods.
e.g. for the summer.
If no domestic hot water tank is con-
nected, the message ”Without func-
tion” is displayed.
The circulation pumps are switched on
for a short time every 24 hours to pre-
vent them from seizing up.
5303 272 v1.3
Boiler temperature
IMPORTANT
IMPORTANT

Operating Instructions (in brief)
12
Altering Room Temperature
In the ”Central heating and domestic hot water” heating program, central heating
takes place with alternating ”normal room temperature” and ”reduced room
temperature” according to the selected time program.
You can set the required room temperature as follows:
To change the ”normal room temperature”
Normal room temp.
ºC
Factory setting: 68 ºF / 20 ºC from
06:00 to 22:00 hrs.
The ”normal room temperature” can be
set between 37 and 99 ºF / 3 and
37 ºC.
Press or or to select the
desired heating circuit.
Turn the ” ” selector knob; the
temperature value appears in the
display window.
Example
For the times you spend at home and
require a comfortably warm room
temperature.
If this is not done, the following
instruction appears in display: ”Select
button 1-2” or button ”1-3”.
To change the ”reduced room temperature”
Frost protection
ºC
Reduced room temp.
ºC
Factory setting: frost protection 37 ºF /
3 ºC from 22:00 to 06:00 hrs.
The ”reduced room temperature” can be
set between 37 and 99 ºF / 3 and
37 ºC.
1. Open the hinged cover on the
programming unit.
2. Press ; the display shown on the
left appears.
3. Set the required value with the or
button.
4. Confirm by pressing ;the
temperature value stops flashing and
is saved.
5. Close the hinged cover on the
programming unit.
Example
At nighttime or times you spend away
from home.
5303 272 v1.3

Operating Instructions (in brief)
13
Setting the Party Mode
Switch on the party mode when you require central heating and domestic hot water
for a short time independent of the preset heating and time program. During the
party mode, your central heating system operates on the basis of the selected
”normal room temperature”.
You can adjust the room temperature (party temperature) to suit your personal
preference.
To activate the party mode
Party mode
ºC
Press . The button is lit and remains
lit throughout the party mode.
The display for the party mode appears
in the display window for a short time
and the preset temperature value
flashes.
Example
Use when you want to stay up longer
than usual, e.g. because you have
guests, and require central heating
and domestic hot water without
having to change the time program.
To change the room temperature (party temperature)
1. Open the hinged cover on the
programming unit.
2. Press or or to select a
heating circuit. Then press .The
preset temperature value flashes.
3. Set the required value with the or
button.
4. Confirm by pressing ;the
temperature value stops flashing and
is saved.
5. Close the hinged cover on the
programming unit.
To cancel the party mode
The party mode is cancelled the next
time the preset heating program
switches automatically to central
heating with ”normal room
temperature”.
If you want to cancel the party mode
immediately, press the button
again; the button is no longer lit.
Use party mode if the space heating func-
tion of your heating system is deacti-
vated, but temporary reactivation is de-
sired. DHW production is also reinstated.
Setting the Energy Saving Mode
The energy saving mode is only possible in the ” ” heating program.
Switch on the energy saving mode when you require economical central heating for
a short time. In the energy saving mode the preset room temperature is
automatically lowered.
Energy saving mode
To activate the energy saving mode
Press or or to select a heating
circuit. Then press . The button is lit
and remains lit throughout the energy
saving mode.
The display for the energy saving mode
appears in the display window for a short
time.
To cancel the energy saving mode
The energy saving mode is cancelled
automatically the next time the preset
heating program switches to central
heating with ”reduced room
temperature”.
To cancel the energy saving mode
immediately, select the heating circuit
and press to deactivate the energy
saving mode. The button will no
longer be lit.
Example
Use when you leave the house
unoccupied for some time, e.g. to go
shopping during the day.
Energy saving mode lowers the room tem-
perature by approx. 4 °F/2°C.
5303 272 v1.3
IMPORTANT
IMPORTANT

Activating and Deactivating the Heating System
14
Activating the Heating System
The initial start-up and adjustment of the control unit to local conditions and the
structural characteristics of the building must be performed by your heating
contractor.
We advise you to contact your heating contractor before re-starting the heating
system if it has been shut down for a long period.
1. Check the pressure of the heating
system on the pressure gage :
If the needle is below the red marker
or 10 psi / 0.7 bar the system
pressure is too low - in which case
you need to add more water or
contact your heating contractor.
2. Open the shut-off valves in the oil
pipes (at the tank and filter) or open
the gas shut-off valve, whichever is
applicable.
3. Switch on the power, e.g. at the
breaker or electrical disconnect
switch.
4. Switch on the heating system on /
off switch ” ”; the operating status
is indicated by the green LED and the
boiler water temperature will appear
in the display (see page 7).
Your heating system and, if installed,
the remote control are now ready for
operation.
See Start-up Instructions of
the boiler (and DHW tank if
applicable)
Deactivating the Heating System
If you do not want to use your heating system temporarily, e.g. during your summer
holidays, switch to stand-by operation (see ”Setting the Heating Program”).
Ifyoudonotwanttouseyourheatingsystemforalongperiod(severalmonths),
you should shut down the system.
We advise you to contact your heating contractor before shutting down the heating
system for long periods. Your heating contractor will take any necessary action,
e.g. for frost protection of the system or to safeguard the heat exchanger surfaces.
1. Switch off the heating system on /
off switch ” ”.
2. Close the shut-off valves in the oil
pipes (at the tank and filter) or close
the gas shut-off valve, whichever is
applicable.
3. Switch off the power supply, e.g. at
the breaker or electrical disconnect
switch.
The power supply to the system is
now switched off.
There is no frost protection.
The settings of the control unit remain
intact.
5303 272 v1.3
IMPORTANT

Time Program for Central Heating
15
Altering the Time Program for Central Heating
The time program consists of 4 cycles. Heating cycle 1 is preset at the factory from
06:00 to 22:00 hrs, i.e. you have the ”normal room temperature” during this period.
You have the following options to set the timer program to suit your requirements:
By setting the corresponding timer cycles, the central heating can be switched
up to 4 times per day between the ”normal room temperature” and
the ”reduced room temperature”.
You can set identical timer cycles for every day of the week or individual timer
cycles for each day of the week.
When setting the heating cycle, please
take into account the reaction time of
your heating system. Therefore choose
correspondingly earlier starting and
finishing times.
When timer is programmed with
--:--, heating circuits will be in
continuous energy saving mode.
When timer is programmed with
ON 00:00, OFF 24:00, heating circuits
will be in continuous normal room
temperature mode.
Identical time cycles for every day of the week
1Time Prog. Central Htg.
1 --- 7
1
1 --- 7
11. Open the hinged cover on the
programming unit. Select heating
circuit, activating or or .
12. for ”Central heating time
program”.Waituntilthe
display shown on the left
appears.
13. for ”Heating cycle 1”.
14. for ”Heating cycle 1 ON”.
15. /
to enter the start of the
cycle
16. to confirm; the display
changes to ”Heating
cycle 1 OFF”.
17. /
to enter the end of the
cycle.
18. to confirm; the display
changes to ”Heating
cycle 2 ON”.
19. To set the start and end of heating
cycles 2 to 4, follow the procedure
described in points 5 to 8.
10. Close the hinged cover on the
programming unit.
To scan the heating cycles
Follow the procedure described above,
but without using the and
buttons.
The heating cycles at a glance
1. Open the hinged cover on the
programming unit.
2. Press and simultaneously;
thepresetcyclesappearonatime
slot graphic.
3. Close the hinged cover on the
programming unit.
If you wish to exit the time program
setting mode, press again.
Press to skip a timer cycle.
After you have confirmed the last
input with , the display changes
and shows the boiler water
temperature.
5303 272 v1.3
IMPORTANT

Time Program for Central Heating
16
Altering the Time Program for Central Heating (continued)
Individual heating cycles for each day of the week
1Time Prog. Central Htg.
1 --- 7
1Time Prog. Central Htg.
Mo
1
Mo
1. Open the hinged cover on the
programming unit. Select heating
circuit, activating or or .
12. for ”Central heating time
program”. Wait until the
display shown on the left
appears.
13. /to enter the day of the
week for which you
require a different time
program.
14. for ”Heating cycle
1”.
15. for ”Heating cycle 1
ON”.
16. /to enter the start of the
cycle.
17. to confirm; the display
changes to ”Heating
cycle 1 OFF”.
18. /to enter the end of the
cycle.
19. to confirm; the display
changes to ”Heating
cycle 2 ON”.
10. To set the start and end of heating
cycles 2 to 4, follow the procedure
described in points 6 and 9.
11. Close the hinged cover on the
programming unit.
To scan the heating cycle timer
Follow the procedure described above,
but without using the and
buttons.
The heating cycles at a glance
1. Open the hinged cover on the
programming unit.
2. Press and simultaneously; the
preset heating cycles for the current
day of the week appear on a time
slot graphic.
3. Close the hinged cover on the
programming unit.
If you wish to exit the time program
setting mode, press again.
Press to skip a timer cycle.
After you have confirmed the last
input with , the display changes
and shows the boiler water
temperature.
5303 272 v1.3

DHW Production
17
Altering the Time Program for DHW Production
The time program consists of 4 DHW cycles. Cycle 1 is preset at the factory from
05:30 to 22:00 hrs, i.e. domestic hot water is heated during this period.
The automatic mode is also selected, i.e. domestic hot water heating takes place
parallel to the central heating time program, but starts 30 minutes earlier.
You have the following options to set the DHW cycles to suit your requirements:
By setting the corresponding timer cycles, domestic hot water heating can be
switched on and off up to 4 times per day.
You can set identical timer cycles for every day of the week or individual timer
cycles for each day of the week.
If you require domestic hot water heating on a one time basis outside the
programmed DHW cycle, e.g. after 22.00 hrs., press twice 2 to 3 seconds
apart.
The control unit is set up so that the
last setting change is applicable to all
heating circuits, i.e. a change of the
time program for heating circuit 1 is
also applied to the other heating
circuits. If you require this to be
changed, please contact your heating
contractor.
When timer is programmed with --:--,
DHW production is disabled.
When timer is programmed with ON
00:00 OFF 24:00, DHW production is
possible 24 hours a day, 7 days a week.
Identical cycles for every day of the week
Automatic?
1Time prog. DHW
1 --- 7
1. Open the hinged cover on the
programming unit.
2. for ”DHW time pro-
gram”.Waituntilthe
display shown on the left
appears.
3. for ”Individual?”.
4. to confirm.
5. for ”DHW cycle 1”.
6. for ”DHW cycle 1 ON”.
7. /to enter the start of the
cycle.
8. to confirm; the display
changes to ”DHW cycle
1 OFF”.
9. /to enter the end of the
cycle.
10. to confirm; the display
changes to ”DHW cycle
2ON”.
11. TosetthestartandendofDHW
cycles 2 to 4, follow the procedure
described in points 5 to 10.
12. Close the hinged cover on the
programming unit.
If you wish to exit the time program
setting mode, press again.
Press to skip a timer cycle.
After you have confirmed the last
input with , the display changes
and shows the boiler water
temperature.
5303 272 v1.3
IMPORTANT

DHW Production
18
Altering the Time Program for DHW Production (continued)
1
1 --- 7
To scan the DHW cycle timer
Follow the procedure described above,
but without using the and
buttons.
The DHW cycles at a glance
1. Open the hinged cover on the
programming unit.
2. Press and simultaneously; the
preset timer cycles appear on a time
slot graphic.
3. Close the hinged cover on the
programming unit.
5303 272 v1.3

DHW Production
19
Altering the Time Program for DHW Production (continued)
Individual DHW cycles for each day of the week
Automatic?
1Time prog. DHW
1 --- 7
MTime prog. DHW
Mo
1. Open the hinged cover on the
programming unit.
2. for ”DHW time pro-
gram”. Wait until the
display shown on the left
appears.
3. for ”Individual?”.
4. to confirm.
5. /to enter the day of the
week for which you
require a different time
program.
6. for ”DHW cycle 1”.
7. for ”DHW cycle 1 ON”.
8. /to enter the start of the
cycle.
9. to confirm; the display
changes to ”DHW cycle
1 OFF”.
10. /to enter the end of the
cycle.
11. to confirm; the display
changes to ”DHW cycle
2ON”.
12. TosetthestartandendofDHW
cycles 2 to 4, follow the procedure
described in points 6 to 10.
13. Close the hinged cover on the
programming unit.
If you wish to exit the time program
setting mode, press again.
Press to skip a timer cycle.
After you have confirmed the last
input with , the display changes
and shows the boiler water
temperature.
5303 272 v1.3

DHW Production
20
Altering the Time Program for DHW Production (continued)
1
Mo
To scan the DHW cycles
Follow the procedure described above,
but without using the and
buttons.
The DHW cycles at a glance
1. Open the hinged cover on the
programming unit.
2. Press and simultaneously; the
preset timer cycles for the current
day of the week appear on a time
slot graphic.
3. Close the hinged cover on the
programming unit.
Altering the DHW Temperature
You can choose the domestic hot water temperature to suit your personal
preference (e.g. for showering).
Desired DHW temp.
ºC
1. Open the hinged cover on the
programming unit.
2. for domestic hot water
temperature; the tempera-
ture value flashes.
3. /to enter the required value.
4. to confirm; the temperature
value stops flashing and is
stored.
5. Close the hinged cover on the
programming unit.
5303 272 v1.35303 272 v1.3