Bosch FW 100 User manual

Installation and operating instructions
Weather-compensated controller with solar control
FW 100
6 720 612 481-00.1R
for heating appliances with BUS-enabled Heatronic 3
6 720 645 349 (2010/09)

6 720 645 349 (2010/09)
2| Overview of controls and symbols
Overview of controls and symbols
Fig. 1 Standard display
6 720 617 763-01.1O
3
34
1
menu info
1
2
35
6
7
8
4
912 h15
18
21
24 h
3
6
advance advance

6 720 645 349 (2010/09)
Overview of controls and symbols | 3
Controls
1Turning the rotary selector in +direction:
Selects menu/information above or increases
setting value
Turning the rotary selector in – direction:
Selects menu/information below or decreases
setting value
Pushing the rotary selector : Opens menu or
confirms setting/value
2Operating mode selector for heating:
Automatic mode
Constant Comfort
Constant Economy
Constant Frost
3Key :
To bring the next switching time and the associated
operating mode
= Comfort
= Economy
= Frost1
for central heating forward to the current time.
4Key : To activate DHW heating immediately
(the activated function cannot be switched off prior
to expiry of the fixed time). The DHW cylinder is
heated to the required temperature for 60 minutes
or, with combi boilers, comfort mode is activated
for 30 minutes.
5Key : Open/close menu INSTALLER
SETTINGS open: hold down for approx. 3 seconds
6Key : Display values
7Key : Delete/reset value
8Key : Return to next menu level up
Tab. 1
To make the further description
easier
•controls and operating modes
are sometimes only depicted
with symbols, e.g. or .
•menu levels are separated by the
>symbol, e.g. Holiday > Start.
menu
info
Symbols
Current room temperature
(only with wall mounting)
Flashing segment:
Current time (13:45 to 14:00)
Solid segments:
Period for operating mode = Comfort
today (1 segment = 15 min)
Empty segments:
Period for operating mode = Economy
today (1 segment = 15 min)
No segments:
Period for operating mode = Frost
today (1 segment = 15 min)
Operating mode Comfort
Operating mode Economy
Operating mode Frost
Automatic mode
Holiday mode
Burner operation in the display
+Scroll menu/info text up or increase value
– Scroll menu/info text down or decrease
value
ok Open menu, confirm setting/value
Return to next menu up
Delete/reset value
Bring the next switching time and the
associated operating mode
= Comfort
= Economy
= Frost
for central heating forward to the current
time.
Activate DHW heating immediately (the
activated function cannot be switched off
prior to expiry of the fixed time). The DHW
cylinder is heated to the required
temperature for 60 minutes or, with combi
boilers, comfort mode is activated for 30
minutes.
Tab. 2
12 h
15
9
3

6 720 645 349 (2010/09)
4| Contents
Contents
1 Key to symbols and safety instructions . 7
1.1 Explanation of symbols . . . . . . . . . . 7
1.2 Safety instructions . . . . . . . . . . . . . 7
2 Technical data for the accessory item . . . 8
2.1 Standard delivery . . . . . . . . . . . . . . 8
2.2 Specification . . . . . . . . . . . . . . . . . . 9
2.3 Cleaning . . . . . . . . . . . . . . . . . . . . . 9
2.4 Supplementary accessories . . . . . . . 9
2.5 Sample system . . . . . . . . . . . . . . . 10
3 Installation (for contractors only) . . . . . 12
3.1 Installation . . . . . . . . . . . . . . . . . . . 12
3.1.1 Installation in heating appliance . . 12
3.1.2 Wall mounting . . . . . . . . . . . . . . . . 14
3.1.3 Installation of outside
temperature sensor . . . . . . . . . . . .15
3.1.4 Fitting other accessories . . . . . . . . 16
3.1.5 Disposal . . . . . . . . . . . . . . . . . . . . . 16
3.2 Electrical connections . . . . . . . . . . 16
3.2.1 Electrical connection in the
heating appliance . . . . . . . . . . . . . .16
3.2.2 Electrical connection for wall
mounting . . . . . . . . . . . . . . . . . . . .17
4 Commissioning (contractors only) . . . . 18
5 Operation . . . . . . . . . . . . . . . . . . . . . . . . 19
5.1 Changing the room temperature
and operating mode . . . . . . . . . . . .19
5.1.1 Changing the room temperature
with (with time limit) . . . . . . . . . .19
5.1.2 Changing the operating mode with
(with time limit) . . . . . . . . . . . . . . .19
5.1.3 Changing the DHW mode with
(with time limit) . . . . . . . . . . . . . . 20
5.1.4 Changing heating mode
permanently . . . . . . . . . . . . . . . . . 20
5.2 Menu control . . . . . . . . . . . . . . . . . 21
5.2.1 Programming example . . . . . . . . . . 21
5.2.2 Deleting or resetting program
details . . . . . . . . . . . . . . . . . . . . . . 24
6 Adjusting the MAIN MENU . . . . . . . . . . . 26
6.1 Overview and adjustment of the
MAIN MENU . . . . . . . . . . . . . . . . . 26
6.1.1 MAIN MENU: Holiday . . . . . . . . . . . 26
6.1.2 MAIN MENU: Heating . . . . . . . . . . . 27
6.1.3 MAIN MENU: Domestic hot water . 28
6.1.4 MAIN MENU: General settings . . . . 30
6.1.5 MAIN MENU: Solar . . . . . . . . . . . . . 30
6.2 Holiday program . . . . . . . . . . . . . . 31
6.3 Heating program . . . . . . . . . . . . . . 32
6.3.1 Time/Temperature level program . 32
6.3.2 Temperature for the operating
modes and heat-up rate . . . . . . . . 33
6.4 DHW program . . . . . . . . . . . . . . . . 34
6.4.1 DHW program operating modes . . 34
6.4.2 Time/temperature level program
for DHW via cylinder . . . . . . . . . . . 35
6.4.3 Time program for DHW with combi
boiler . . . . . . . . . . . . . . . . . . . . . . 35
6.4.4 Time program for DHW circulation
pump (only with DHW cylinder) . . 36
6.4.5 Parameters for DHW . . . . . . . . . . . 36
6.4.6 Thermal disinfection of DHW . . . . . 37
6.5 General settings . . . . . . . . . . . . . . 38
6.5.1 Time and Date . . . . . . . . . . . . . . . . 38
6.5.2 Display formats . . . . . . . . . . . . . . . 38
6.5.3 Key lock . . . . . . . . . . . . . . . . . . . . . 38
6.5.4 Language . . . . . . . . . . . . . . . . . . . . 38
6.6 Solar settings . . . . . . . . . . . . . . . . 39
7 Viewing information . . . . . . . . . . . . . . . . 40
Chapters against a grey
background are intended for
installers. The pages concerned
are identified by a grey vertical bar
at the side of the page.

6 720 645 349 (2010/09)
Contents | 5
8 Menu settings INSTALLER SETTINGS
(contractors only) . . . . . . . . . . . . . . . . . 43
8.1 INSTALLER SETTINGS menu
summary and settings . . . . . . . . . . 43
8.1.1 INSTALLER SETTINGS:
System configuration . . . . . . . . . . . 43
8.1.2 INSTALLER SETTINGS:
Heating parameters . . . . . . . . . . . . 44
8.1.3 INSTALLER SETTINGS:
Solar system config . . . . . . . . . . . . 44
8.1.4 INSTALLER SETTINGS:
Solar sys parameters . . . . . . . . . . . 45
8.1.5 INSTALLER SETTINGS:
Fault history . . . . . . . . . . . . . . . . . 45
8.1.6 INSTALLER SETTINGS:
Cust service address . . . . . . . . . . . 46
8.1.7 INSTALLER SETTINGS:
System info . . . . . . . . . . . . . . . . . . 46
8.1.8 INSTALLER SETTINGS:
Floor drying . . . . . . . . . . . . . . . . . . 46
8.2 Configuring the heating system . . . 47
8.3 Parameters for heating . . . . . . . . . . 47
8.4 Configuring the solar thermal
system . . . . . . . . . . . . . . . . . . . . . . 51
8.5 Parameters for solar thermal
system . . . . . . . . . . . . . . . . . . . . . . 52
8.5.1 Parameters for the standard solar
thermal system . . . . . . . . . . . . . . . 52
8.5.2 Parameters for thermal
disinfection . . . . . . . . . . . . . . . . . . 53
8.5.3 Parameters for solar optimisation . 53
8.5.4 Commissioning the solar
thermal system . . . . . . . . . . . . . . . 55
8.6 Fault history . . . . . . . . . . . . . . . . . . 55
8.7 Viewing and entering the customer
service address . . . . . . . . . . . . . . . 55
8.8 Viewing system information . . . . . . 56
8.9 Screed drying function . . . . . . . . . . 56
9 Troubleshooting . . . . . . . . . . . . . . . . . . . 58
9.1 Troubleshooting with display . . . . 58
9.2 Troubleshooting without display . 64
10 Energy saving tips . . . . . . . . . . . . . . . . . 66
11 Environmental protection . . . . . . . . . . . 67
12 Individual time program settings . . . . . 68
12.1 Heating program . . . . . . . . . . . . . . 68
12.2 DHW program . . . . . . . . . . . . . . . . 71
12.3 DHW circulation program . . . . . . . 72
Index . . . . . . . . . . . . . . . . . . . . . . . . . . . 73

6 720 645 349 (2010/09)
6| Information about this documentation
Information about this documentation
Guide to instructions
If you ...
•... are looking for the safety instructions and a
key to the symbols, refer to chapter 1.
•... are looking for a summary of the layout and
function of this accessory, refer to chapter 2.
You will also find the specification there.
•... are a HEATING CONTRACTOR and want to
know to install, electrically connect and
commission this accessory, refer to
chapters 3 and 4.
•... want to know how to operate and program
this accessory, refer to chapters 5,6and 12.
There you will also find summaries of the
factory settings and setting ranges for the
menus. There are also tables for making a note
of your settings.
•... want to display information regarding the
heating system, see chapter 7.
•... are a HEATING CONTRACTOR and want to
make expert level settings or view system
information, refer to chapter 8. There you will
also find summaries of the factory settings
and setting ranges for the menus. There are
also tables for making a note of your settings.
•... are looking for troubleshooting tables, refer
to chapter 9.
•... are looking for tips on energy efficiency, see
chapter 10.
•... are looking for a particular reference in the
document, have a look in the Keyword index
on the last pages.
Supplementary documentation for contractors
(not part of the standard delivery)
In addition to these instructions, the following
documents are available:
•Spare parts list
•Service folder (for troubleshooting and
function tests)
You can request these documents from the Bosch
Info service. The contact address is printed on
the back page of these instructions.
Hand all documentation enclosed to
the user.

6 720 645 349 (2010/09)
Key to symbols and safety instructions | 7
1 Key to symbols and safety instructions
1.1 Explanation of symbols
Warnings
Keywords at the start of a warning indicate the
type and seriousness of the ensuing risk if
measures to prevent the risk are not taken.
•NOTE indicates that material losses may
occur.
•CAUTION indicates that minor to medium
injury may occur.
•WARNING indicates that severe injury may
occur.
•DANGER indicates a risk to life.
Important information
Additional symbols
1.2 Safety instructions
BThese instructions must be observed to
ensure correct operation.
BInstall and commission the heating appliance
and all accessories in accordance with the
instructions provided.
BThis accessory must only be installed by
suitably qualified installers.
BOnly use these accessories in conjunction
with the heating appliances listed. Follow the
connection diagram!
BDo not connect this accessory to the 230 V
mains electricity supply.
BPrior to the installation of this accessory:
Isolate the heating appliance and all other
BUS subscribers from the power supply
(220 to 240 V AC).
BFor wall mounting: never install this accessory
in wet areas.
BInstruct customers about the functions and
operation of the accessories.
BRisk of scalding during thermal disinfection:
Supervise short periods of operation with
water temperatures over 60 °C or fit a
thermostatic DHW mixer.
BWhen there is a risk of frost, leave the heating
appliance switched on and follow the frost
protection information.
Warnings in this document are framed
and identified by a warning triangle
printed against a grey background.
If there is a danger due to
electricity, the exclamation mark in
the warning triangle is replaced by a
lightning symbol.
Important information where there is
no risk to people or property is
indicated with the adjacent symbol. It
is bordered by lines above and below
the text.
Symbol Explanation
BAction step
ÆCross-reference to other parts of this
document or to other documents
•List/list entry
–List/list entry (second level)
Tab. 3

6 720 645 349 (2010/09)
8| Technical data for the accessory item
2 Technical data for the accessory item
•This controller is used to display appliance
and system information and to change the
settings shown.
•The controller is a weather-compensated
controller for central heating and DHW
heating with time programs:
–Central heating : 3 seven-day heating
programs with 6 switching times per day
are available (one program is active).
–Domestic hot water : weekly DHW
program with 6 switching times per day.
•Options:
–Remote control FB 100 or FB 10.
–Module IPM 1 for controlling one mixed or
non-mixed heating circuit.
–ISM 1 module for solar DHW heating.
•The controller has a power reserve sufficient
for at least 6 hours of operation. If the
controller is without power for a period longer
than the power reserve then the time and date
will be deleted. All other settings are saved.
•Installation options:
–In heating appliance with BUS-enabled
Heatronic 3
–Wall-mounted with BUS connection to
heating appliance with BUS-enabled
Heatronic 3
2.1 Standard delivery
Fig. 2 Standard delivery
1Controller top section
2Base for wall mounting
3Slide cover
4Installation and operating instructions
5Outside temperature sensor with fixing
materials
The FW 100 can only be connected
to a heating appliance with BUS-
enabled Heatronic 3.
2x
2x
5
2
4
1
3
6 720 612 481-01.1R
8

6 720 645 349 (2010/09)
Technical data for the accessory item | 9
2.2 Specification
2.3 Cleaning
BIf required, use a damp cloth to wipe the
controller casing. Never use aggressive or
acidic cleaning agents for this.
2.4 Supplementary accessories
See also the pricelist.
•IPM 1: Module for controlling one mixed or
one non-mixed heating circuit.
•ISM 1: Module for controlling solar water
heating.
•IUM 1: Module for controlling external safety
equipment.
•FB 10: Remote control for the mixed or non-
mixed heating circuit.
•FB 100: Remote control with plain text display
for the mixed or non-mixed heating circuit.
•No. 1143: Cable set for fitting one module
(e.g. IPM 1) inside the heating appliance.
Dimensions Fig. 8, page 14
Rated voltage 10...24 V DC
Rated current
(excluding illumination)
6 mA
Controller output 2-wire BUS
Permiss. ambient temp. 0 ... +50 °C
IP rating III
Protection:
- Built into the Heatronic 3
- Wall mounting
IPX2D
IP20
Tab. 4 Specification
°C ΩAF °C ΩAF
– 20 2392 4984
– 16 2088 8842
– 12 1811 12 720
– 8 1562 16 616
– 4 1342 20 528
±0 1149 24 454
Tab. 5 Actual values, outside temperature
sensor

6 720 645 349 (2010/09)
10 | Technical data for the accessory item
2.5 Sample system
Fig. 3 Simplified system scheme (see technical guides for installation illustration and further options)
6 720 613 557-01.2O
WW
TWM
KW
S...solar
SP SF
HK
MF
TB
M
P
1)
FW 100 FB 10
VF
230V AC
T
2
AF
FK
230V AC
ISM1
2)
T
1
FB 100
2)
HP
1)
FW 100
HW
IPM1
230V AC

6 720 645 349 (2010/09)
Technical data for the accessory item | 11
AF Outside temperature sensor
FB 10 Remote control
FB 100 Remote control
FK Flat-plate collector
FW 100 Weather-compensated controller with
solar control
HK Heating circuit
HP Heating circuit pump
HW Low loss header
IPM 1 Module for one heating circuit
ISM 1 Module for solar DHW heating
KW Cold water connection
MMixer servomotor
MF Flow temperature sensor, mixed
heating circuit
PCirculation pump for heating circuit
SP Solar circuit pump
S...solar Solar combi cylinder
SF Cylinder temperature sensor (NTC)
T1Collector temperature sensor
T2Cylinder temperature sensor on the
heating water side, bottom
TB Temperature limiter
TWM Thermostatic DHW mixer
VF Common flow sensor
WW DHW connection
1) The FW 100 can be mounted in the
heat source or on the wall.
2) Either FB 10 or FB 100

6 720 645 349 (2010/09)
12 | Installation (for contractors only)
3 Installation (for contractors only)
The detailed system scheme for installing the
hydraulic components and associated control
devices can be found in the technical guides or
tender documentation.
3.1 Installation
3.1.1 Installation in heating appliance
BDetailed description of heating appliance
components, see heating appliance
installation instructions.
BRemove outer casing.
Fig. 4
BRemove cover and dummy cover.
Fig. 5
BInsert top section into slots.
Fig. 6
DANGER: Risk of electric shock!
BPrior to the installation of this
accessory:
Isolate the heating appliance and
all other BUS subscribers from the
power supply (220 to 240 V AC).
6 720 645 342-03.1O
3.
6 720 641 933-33.1O
4.
1.
2.
6 720 641 933-31.1O

6 720 645 349 (2010/09)
Installation (for contractors only) | 13
BClick top section into place and mount cover.
Fig. 7
6 720 641 933-32.1O
2.
1.
3.
4.

6 720 645 349 (2010/09)
14 | Installation (for contractors only)
3.1.2 Wall mounting
The control quality of the controller is dependent
on where it is installed.
The installation location (= lead room) must be
suitable for controlling the heating.
BSelect the installation location.
Fig. 8
BRemove the top section and slide cover from
the base.
Fig. 9
BFit the base.
Fig. 10
BMake the electrical connections (ÆFig. 14 or
15 on page 17).
BRefit top section an slide cover on base.
Fig. 11
The mounting surface on the wall
should be level.
6 720 612 481-03.1R
0,3 m0,3 m
1,2 - 1,5 m
0,6 m
119 mm
134 mm
35 mm
1.
2.
3.
6 720 612 220-27.1J
6 720 645 340-07.1O
6 mm 3,5 mm6 mm
3.
2.
1.
6 720 612 220-06.1R

6 720 645 349 (2010/09)
Installation (for contractors only) | 15
3.1.3 Installation of outside temperature sensor
Control quality depends on installation location
of outside temperature sensor AF.
BSelect the installation location.
Fig. 12
1
/
2
H
(min 2m)
H
1
/
2
Y
Y
1
/
2
H
(min 2m)
H
N
S
WE
NW NE
SW SE
6 720 645 349-02.1O

6 720 645 349 (2010/09)
16 | Installation (for contractors only)
BRemove cover.
BFix sensor housing to external wall with two
screws.
Fig. 13
3.1.4 Fitting other accessories
BFit accessories according to the legal
requirements and the installation instructions
supplied with them.
3.1.5 Disposal
BDispose of packaging in an environmentally
responsible manner.
BWhen replacing components, dispose of the
used components in an environmentally
responsible manner.
3.2 Electrical connections
3.2.1 Electrical connection in the heating
appliance
BInstallation of the controller automatically
produces BUS connection via the three
contacts (ÆFig. 6 on page 12).
Fig. 14 Controller installed via BUS contacts in
BUS-enabled Heatronic 3.
1.
2.
6 720 610 967-10.2J
The controller recognises via the
third contact that it is installed
inside the heating appliance.
FW 100
124BB
6 720 613 557-02.1R
ST 19
Heatronic 3
AF
AF

6 720 645 349 (2010/09)
Installation (for contractors only) | 17
3.2.2 Electrical connection for wall mounting
BBUS connection from the controller to other
BUS subscribers:
Use electrical cable according to local codes
and requirements.
Permissible cable lengths from the BUS-enabled
Heatronic 3 to the controller:
BTo prevent inductive interference: Route all LV
leads separately from cables carrying 220 to
240 V or 380 to 415 V (minimum separation
100 mm).
BIn case of external inductive interference,
shield the cables.
This ensures that the cables are shielded from
external interference (e.g. heavy current
cables, overhead wires, transformer stations,
radio and television set, amateur radio
stations, microwave ovens etc).
Fig. 15 Controller connected to BUS-enabled
Heatronic 3.
Fig. 16 BUS links connected via branch box (A)
Permissible cable lengths to outside temperature
sensor:
Cable length Cross-section
≤80 m 0.40 mm2
≤100 m 0.50 mm2
≤150 m 0.75 mm2
≤200 m 1.00 mm2
≤300 m 1.50 mm2
Tab. 6
124BB
6 720 613 557-03.1R
ST 19
AF
B
B
AF
FW 100
Heatronic 3
If the BUS links feature different
cross-sections:
BConnect BUS links via a branch
box.
Cable length Cross-section
≤20 m 0.75 mm2... 1.50 mm2
≤30 m 1.00 mm2... 1.50 mm2
≥30 m 1.50 mm2
Tab. 7
B
2
BB
A
B
2
BB
B
2
BB
6 720 612 220-08.1J
100 mm 100 mm

6 720 645 349 (2010/09)
18 | Commissioning (contractors only)
4 Commissioning (contractors only)
BSet DIP switch at IPM 1 to 1.
BSwitch ON the system.
BSet FB 10 or FB 100 to 1.
During commissioning or after a global reset
(resetting all settings), the language selected for
the factory settings will be displayed.
BSelect the language with and confirm
with .
Set the date and time if the reserve power supply
has run out.
BSelect the hour with and confirm with
.
BSelect the minutes with and confirm
with .
BSelect the year with and confirm with
.
BSelect the month with and confirm with
.
BSelect the day with and confirm with
.
BThe automatic system configuration starts
during commissioning (wait for 60 seconds
and then follow the instructions displayed).
BSwitch off automatic Auto switch between
GMT - BST Æchapter 6.5.1 from page 38
BAdapting other settings to the current system,
Æchapter 6 from page 26 and chapter 8 from
page 43.
BFill and vent solar thermal system according to
its documentation and prepare it for
commissioning as described in chapter 8.4 on
page 51.
BAdapting other settings to the current solar
thermal system, Æchapter 8.5 from page 52.
BCommission the solar thermal system,
Æchapter 8.5.4 on page 55.
Description of the controls
Æpage 2.

6 720 645 349 (2010/09)
Operation | 19
5 Operation
5.1 Changing the room temperature
and operating mode
5.1.1 Changing the room temperature with
(with time limit)
You can also permanently change the required
room temperature, Æchapter 6.3.2 on page 33.
This function is only available if the heating
system is not regulated via remote control
FB 100:
BSet the required room temperature with .
–If the operating mode selector is set to
:
The new temperature applies until the next
switching point. Afterwards, the set
temperature applies for the switching
period.
–If the operating mode selector is set to
/ / : The new temperature applies
until the selector position is changed.
Afterwards, the set temperature applies to
the selected operating mode.
5.1.2 Changing the operating mode with
(with time limit)
To permanently change the operating mode,
Æchapter 5.1.4 on page 20.
This function is only available if the heating system
is not regulated via remote control FB 100 and
automatic mode has been activated :
BPress briefly to bring forward the next
switching time and the associated operating
mode Comfort / Economy / Frost to
the current time.
The display shows the changed details.
BPress and hold and simultaneously turn
the rotary selector to change the next
switching point. As a maximum, the switching
time can be changed between the current
time and the switching time after next.
If the next switching time of the heating
program is exceeded, the function will be
reset, and automatic mode will be active
again.
Cancelling the function early:
BPress briefly again.
The controller provides the option
of setting the required room
temperature for the operating mode
concerned. The temperature given
is not the actual room temperature.
It is an orientation value that
influences the required flow
temperature.
The function can be used in
situations such as going to bed
earlier, being away from home
longer or returning early.

6 720 645 349 (2010/09)
20 | Operation
5.1.3 Changing the DHW mode with
(with time limit)
BPress briefly to activate DHW heating
immediately (the activated function cannot be
switched off prior to expiry of the fixed time):
–The DHW cylinder is heated up to the
maximum temperature set in the DHW
program for 60 minutes.
–With a combi boiler, comfort mode is
activated for 30 minutes.
The display shows the changed details. If the
specified time is exceeded, the function will
be reset, and automatic mode will be active
again.
5.1.4 Changing heating mode permanently
Automatic mode
(factory setting)
Automatic change between Comfort /
Economy / Frost according to the active
heating program. The controller regulates to the
room temperatures selected in submenu Heating
levels (Æchapter 6.3.2 on page 33).
Constant heating
The controller constantly maintains the room
temperature set for Comfort in submenu
Heating levels (Æchapter 6.3.2 on page 33).
The heating program is ignored.
Constant economy
The controller constantly maintains the room
temperature set for Economy in
submenu Heating levels (Æchapter 6.3.2 on
page 33). The heating program is ignored.
Constant frost protection
The controller constantly maintains the room
temperature set for Heating levels in
submenu Heating levels (Æchapter 6.3.2 on
page 33). The heating program is ignored.
You can use this function if you need
hot water outside the programmed
switching times.
DHW is heated independently of the
position of the operating mode selector
in accordance with the DHW program
(
Æ chapter 6.4 from page 34 ).