Viessmann Dekamatik-M1 User manual

5302 682 1/98
Operating Instructions
Dekamatik-M1
Digital indoor/outdoor
boiler and heating system control
Dekamatik-M1
Please file in Sercice Binder

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1.0 Contents
1.1 Safety
1.0 Contents Page
1 Important Precautions 1.1 Safety 2
.......................................................................................................................................
2 Operating Instructions (overview) 2.1 Operating Controls / Display Elements 3............................................................................
2.2 Method of Operation of the Heating System 4..................................................................
2.3 Control Activation 4..................................................................................................................
2.4 Settings and Adjustments 4...................................................................................................
HComfortrol control unit 4......................................................................................................
HSymbols in the display 4.....................................................................................................
HSetting the heating program 5...........................................................................................
HAltering room temperatures 6............................................................................................
HAltering the DHW temperature 6.......................................................................................
HSetting party mode 7............................................................................................................
HSetting energy saving mode 7...........................................................................................
HDay, date and time 7............................................................................................................
HMenu structure 8...................................................................................................................
HTime program
- Explanatory remarks 10
.....................................................................................................
- Altering the switching times 11.........................................................................................
- Calling up the switching times 11....................................................................................
- Deleting activation periods 12..........................................................................................
- Altering the date/time 12....................................................................................................
HHoliday program 13................................................................................................................
HInstaller set-up 14....................................................................................................................
HAltering operating program from remote (via telephone) 14.........................................
HMaximum temperature limit 15.............................................................................................
HDifferential temperature 15...................................................................................................
HHeating curves 16...................................................................................................................
HLead boiler selection control 19...........................................................................................
HDefault factory settings “ ” button 20................................................................................
HHeating system shut-down 20..............................................................................................
3 Override 3 Override Switch 21.....................................................................................................................
4 Information 4.1 Scanning Temperatures (Desired/Actual Values) and
Operating Status Information 22
.............................................................................................
HExplanation of “damped” outdoor temperature 22...........................................................
4.2 Fault Indication 23......................................................................................................................
4.3 Troubleshooting Guide 24........................................................................................................
4.4 Operating the Comfortrol Control Unit 25.............................................................................
HOperational information 25....................................................................................................
HLanguage selection 26...........................................................................................................
HBattery replacement 26..........................................................................................................
4.5 Settings Checklist 27..................................................................................................................

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2.1 Operating Controls / Display Elements
1.1 Safety
This “Attention” symbol is positioned before all important safety tips.
Please follow these instructions in detail to avoid property damage, personal injury, or loss of life.
HInstallation
Please carefully read this manual prior to
attempting equipment operation. Any
warranty is null and void when these
instructions are not followed.
Viessmann boilers, burners and controls
are approved for sale in North America by
International Approval Services (IAS).
All electrical wiring is to be done in
accordance with the latest edition of the
National Electrical Code ANSI/NFPA 70. In
Canada use latest edition of CSA C22.1
Part 1 and/or local codes.
We offer frequent installation and service
seminars to familiarize our partners with our
products. Please inquire.
HWorking on the equipment
All personnel working on the equipment or
the heating system must have the
proper qualifications and hold all
necessary licenses. Ensure main power
supply to equipment, heating system, and
all external controls and power supplies
has been deactivated.Close main gas
or oil supply valve. Take precautions in
both instances to avoid accidental
activation of power during service work.
2.1 Operating Controls / Display Elements with flip-down covers open
Dials shown in default factory position.
1Comfortrol control unit
2Lead boiler selection switch FK/WA.....
= Manual operation
= Automatic operation
3Boiler sequence selection switch
4Burner status indicator ............................
5On/off switch ..........................................
I=on
O=off
6Additional feature slots
operating hour counter h
.......................
7Safety temperature high limit .............
8Adjustable high limit .............................
9TUV service button
(for service purposes only) TUV
............
10 Right flip-down cover
11 Override switch .....................................
= provisional operation
= automatic operation
12 Middle flip-down cover
13 Boiler code plug
ADisplay
BProgram selection switch .......................
CTemperature normal operation .............
DParty button ..............................................
ETemperature reduced operation ...........
FEnergy saving button ..............................
GInformation key (overview) ......................
HDefault factory settings ............................
KAdjustment knob .................................
LSelection keys , , ,.......................
MFlip-down cover

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2.2 Method of Operation of the Heating System
2.3 Control Activation
2.4 Settings and Adjustments
2.2 Method of Operation of the Heating System
Optimum interplay of the individual
components of the heating system is
required in order to generate the right
amount of heat needed to cover the heating
requirements at all times and in all weather
conditions; the boiler and the heat
distribution system (radiators, domestic hot
water tank, pipes etc.) must be correctly
matched to each other. To control this
system, your Viessmann boiler is equipped
with the Dekamatik digital indoor/outdoor
boiler and heating system control.
The Dekamatik matches the boiler water
temperature to various changing conditions
(e.g. the outdoor temperature or a higher
boiler water temperature for heating up a
domestic hot water tank, if installed).
Domestic hot water priority is feasible.
The Dekamatik possesses an integrated
diagnostic system which can recognize and
indicate any malfunctions.
2.3 Control Activation
On/off switch
I=ON
The initial start-up must be conducted by
the heating contractor.
HActivate main power to system.
HActivate Dekamatik-M1:
Switch “”to “I”.
On multi-boiler systems also switch on the
control units of the follow-up boilers.
The heating system is now ready for
operation.
2.4 Settings and Adjustments
Comfortrol control unit
After activation, the control unit shows
- the date and time (as preset in the factory)
- the selected heating program
- the boiler water temperature
The following display appears:
Tuesday,A04.02.96
10:20 HRS
PROGRAM
DHW: ON
SPACE HEATING:ON
BOILER TEMP. : 62 ºC
................STÖRUNG.................
INFO: OPEN COVER
Example of a display (with cover closed)

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2.4 Settings and Adjustments
Symbols in the display
The symbols “ ” ,“ ” or “ ” appear
individually or in combination
according to the current operating status of
the system, i.e. depending on the program
or activation periods.
Heating program “ ” Heating program “ ” Heating program “ ”
DHW: OFF
Space heating: OFF
DHW: ON
Space heating: OFF
DHW: ON
Space heating: ON
No symbols are displayed
after the above data
The symbol ” ” appears if
domestic hot water is being
heated (according to activa-
Both symbols appear in combination if the heating circuit is currently
switched to heating (according to activation period) and the priority
control for domestic hot water heating is not activated.
(
g
tion period) DHW: ON
Space heating: ON
Both symbols appear in combination if the heating circuit is switched to
reduced operation (according to activation period) and the priority con-
trol for domestic hot water heating is not activated.
If only the symbol ” ” appears, the DHW priority control is activated.
DHW: ON
Space heating: OFF
The cu
r
r
ent point in time is outside the pe
r
iod in which domestic hot
water heating is provided.
Domestic hot water heating does not take place. Space heating is OFF.
The current point in time is outside the selected activation period. The
system goes to standby mode, i.e. with frost protection. The selector
knob “ ” is turned to “0”.
Setting the heating program
Three heating programs can be set with the program selection switch.
Program selection switch Heating program When setting required
DHW:ON
Space heating:ON
with frost protection
Factory setting
i.e. du
r
ing the heating season
DHW:ON
Space heating:OFF
with frost protection
i.e. in summer when space heating is not re-
quired
DHW:OFF
Space heating:OFF
Frost protection:ON
i.e. when away on holidays or during
a long period of absence
Frost protection of the heating system
If the outdoor temperature falls below
+34 ºF /+1ºC, the first boiler in a
multi-boiler system is operated with a
minimum boiler water temperature in order
to avoid damage to the heating system due
to freezing. The system pump is activated.
The frost protection function is cancelled
with outdoor temperatures over +37 ºF /
+3 ºC. The system pump is switched off.

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2.4 Settings and Adjustments
Altering room temperatures
Normal operation (i.e. during daytime)
colder warmer
Reduced operation (i.e. during
nighttime)
colder warmer
SELECTED ROOM TEMP.A
PREVIOUS: 20 ºC
CURRENT: . . ºC
INFO: OPEN COVER
SELECTED ROOM TEMP.A
PREVIOUS: 14 ºC
CURRENT: . . ºC
INFO: OPEN COVER
HSet selector knob to required
temperature.
HThe previous and current room
temperatures appear immediately
in the display.
HAfter approx. 5 seconds, the display
changes and the new temperature is
stored.
Note:
The selected room temperatures apply to a
correctly adjusted heating curve (see page
16).
Setting “0” corresponds to approx. 41 ºF /
5ºC (factory setting)
Setting “3” corresponds to approx. 57 ºF /
14 ºC room temperature.
Frost protection of the heating system is
guaranteed in setting ”0”.
Altering the DHW temperature
DHW TANK / TEMP..A
WATER TEMP.:
50 ºC
>CHANGE TEMP. A..........
>BACK: C..................
>MAIN MENU: D............
If you wish to adjust the domestic hot water
temperature, open the cover and scroll
through the menu as follows:
HSelect DHW.
HSelect TEMPERATURE.
You are now in the TEMPERATURES
menu. Follow the menu and adjust the
domestic hot water temperature.
Please refer also to the sections headed
”Menu Structure” on pages 8 and 9.

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2.4 Settings and Adjustments
Setting party mode
TUESDAY,A04.02.96
18:30 HRS
PARTY MODE
SELECTED: 20 ºC
CHANGE PARTY TEMP:
OPEN COVER
BOILER TEMP.: 62 ºC
Note:
Set the party mode when you require room
heating outside the preset heating program
and the preset switching times. Domestic
hot water heating is also available.
HPress “ ” button.
To change the party temperature
HFollow the instructions in the display.
To cancel the party mode:
HPress the “ ” button. Otherwise, the party
mode is cancelled automatically the next
time the preset heating program switches
from reduced operation to normal
operation.
Setting energy saving mode
TUESDAY,A04.02.96
10:35 HRS
ENERGY SAVING MODE S
BOILER TEMP.: 62 ºC
INFO: OPEN COVER
Note:
In the energy saving mode, the room
temperature is lowered by approx. 4_F/
2_C.
HPress “ ” button.
To cancel the energy saving mode:
HPress the “ ” button. Otherwise,
the energy saving mode is cancelled
automatically the next time the preset
heating program switches from normal
operation to reduced operation.
Day, date and time
This data is preset in the factory and is
updated through the built-in long-life battery.
If it is necessary to make any adjustment for
daylight-savings time, please refer to
”Altering the date/time” on page 12.

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2.4 Settings and Adjustments
Menu Structure
The following descriptions provide you with
an overview of the menu structure within the
menu-driven Comfortrol control unit.
In this way, finding information in the menu
is simplified.
Please proceed as follows:
HPinpoint the information you wish to query
on the 2nd, 3rd, or 4th level (see
overview).
HTrace the necessary path through the
menu back to the first level.
HFollow the appropriate sequence on the
control unit as described in the diagram
below.
Note:
The levels appear consecutively in the
display.
“Heating circuit” menu structure (Overview 1)
TIMER SWITCHING
TIMES TIME
SCHEDULE
>BOILER CIRCUIT A: A.
>DHW: C..............
>SYSTEM: D.......... DIFFERENT
DAYS
CHANGE
HOLIDAY
PROGRAM
DELETE
HEATING
CURVE HEATING
CURVE SLOPE
SHIFT
MAX. LIMIT
BC.
DIFF. TEMP.
MAIN MENU
1st level 2nd level 3rd level
continue with
DIFFEREN-
TIAL-TEMP.
4th level
”DHW” menu structure (Overview 2)
TIME
SCHEDULE TIME
SCHEDULE
>BC CIRCUIT A: A.....
>:BC CIRCUIT B B.....
>DHW: C..............
>SYSTEM: D..........
DIFFERENT
DAYS
TEMPERA-
TURE CHANGE
TEMP.
DHW TANK
CONDITION
OPERATING
STATUS
MAIN MENU
1st level 2nd level
DHW TANK
RECIRCU-
LATION PUMP
OPERATING
STATUS
TIME
SCHEDULE TIME
SCHEDULE
DIFFERENT
DAYS
DHW CIRC. PUMP
STATUS
3rd level 4th level

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2.4 Settings and Adjustments
”System” menu structure (Overview 3)
*1Only to be carried out by the
*1heating contractor.
*2Can be selected by the heating
*1contractor via the coding address.
*3Display for 3 boilers.
FACTORY
SETTING CLOCK CHANGE
DATE
>BC CIRCUIT A: A.....
>DHW: C.............
>SYSTEM: D.......... CHANGE
TIME
INSTALLER
SETUP
OUTDOOR
TEMP.
COMMON
FLOW TEMP.:
BOILER TEMP.:
OPERATING
STATUS
BURNER
STAGE 1/2: ON/OFF.....
OPERATION 1/2: h......
MAIN MENU
1st level 2nd level 3rd level
ENGLISH
FRANÇAIS
LANGUAGE/
LANGUE
FLUE GAS TEMP.
MAX./CURRENT:
RETURN TEMP.
OP. STATUS
PUMPS
Continue with
*1
SCAN 1, 2, 3:
CODING PLUG:
ASSIGNED TO
COMFORTROL
CODE PLEASE:
ABORT
or
*2
4th level
TEMP. BOILER 1
TEMP. BOILER 2
TEMP. BOILER 3
*3

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2.4 Settings and Adjustments
Time program - Explanatory remarks
General information
A time program consists of switch-on and
switch-off times which are set on the
Comfortrol control unit. Depending on the
heating program you have selected, these
control the switching (on and off) of:
- normal operation
(room heating ON )
- reduced operation
(room heating ON )
- standby mode
(room heating OFF)
- domestic hot water heating
(if installed)
Example:
Heating program “ ”
(Domestic hot water ON/room heating ON)
Please note:
“”knob not turned to “0”.
Activation time: i.e. 6:00 HRS
Changeover from reduced operation to
normal operation
Activation time i.e. 22:00 HRS
You can set up to four activation periods per
day for room heating and domestic hot
water heating
Example of activation periods
for room heating: 05:00 - 08:00 HRS
11:00 - 13:00 HRS
16:00 - 18:00 HRS
21:00 - 24:00 HRS
Only the first activation period is preset in the
factory.
Switch-on time: 6:00 HRS
Switch-off time: 22:00 HRS
The use of the selectable activation periods
ensures economic fuel consumption.
“on” and “off”
reaction times
Illustration of the default factory timer program

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2.4 Settings and Adjustments
Altering the switching times
Set the switching times precisely for those
periods in which you require space heating
or DHW production.
This will reduce your heating bills.
You can program up to 4 activation periods
per day for room heating and domestic hot
water.
You can enter the same time program for
every day of the week or a different time
program for individual days. If you do not
enter individual switching times, the control
unit will operate in accordance with the
factory setting, i.e. room heating and
domestic hot water heating are in operation
from 6:00 to 22:00 HRS.
When setting the activation periods, please
take into account the reaction time of your
heating system.
Rooms may not be warm at precisely 6:00
HRS if space heating is scheduled to begin
at that time. Allow the system time to warm
up and cool down respectively.
- Identical timer schedule for every day
of the week
Theswitchingtimescanbeset
separately for the boiler circuit
and for domestic hot water.
To do so, open the cover below
the display and follow the menu structure.
Refer to the menu structure (Overview 1
and 2) on page 8.
Heating circuit
HSelect BOILER CIRCUIT.
HSelect TIMES.
HSelect SWITCHING TIMES.
HSelect TIME SCHEDULE.
HChange the switching times with
the “”adjustment knob as required
and in each case confirm by pressing
the specified button.
DHW production
(DHW tank and DHW circulation pump)
HSelect DHW.
HSelect DHW TANK or
DHW CIRCULATION PUMP.
HSelect SWITCHING TIMES.
HSelect TIME SCHEDULE.
HChange the switching times with
the “”adjustment knob as required
and in each case confirm by pressing
the specified button.
- Unique timer schedule for each day of
the week
First set the same switching times for
every day of the week (see above). Then
set the switching times for individual days.
Heating circuit
HSelect BOILER CIRCUIT.
HSelect TIMES.
HSelect SWITCHING TIMES.
HSelect DIFFERENT DAYS.
HSelect the day and in each case confirm
by pressing the specified button.
HSelect TIME SCHEDULE.
HChange the switching times with
the “”adjustment knob as required
and in each case confirm by pressing
the specified button.
DHW production
(DHW tank and DHW circulation pump)
HSelect DHW.
HSelect DHW TANK or
DHW CIRCULATION PUMP.
HSelect SWITCHING TIMES.
HSelect DIFFERENT DAYS.
HSelect the day and in each case confirm
by pressing the specified button.
HSelect TIME SCHEDULE
HChange the switching times with
the “”adjustment knob as required
and in each case confirm by pressing
the specified button.
Calling up the switching times
Open the cover below the display. Heating circuit
HSelect BOILER CIRCUIT.
HSelect TIMES.
HSelect SWITCHING TIMES.
HEXIT: Close cover.
DHW production
HSelect DHW.
HSelect SWITCHING TIMES.
HEXIT: Close cover.

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2.4 Settings and Adjustments
Deleting activation periods
HOpen cover.
HSelect BOILER CIRCUIT or DHW.
HCall up the entered times via TIMES or
SWITCHING TIMES and change.
HTurn the “”adjustment knob
counter-clockwise until “--: --” appears; the
corresponding time is now deleted.
Altering the date/time
If it should be necessary to change the date
or time, please follow the menu structure
(Overview 3, page 9):
SYSTEMEE/ECLOCK
TODAY IS
TUESDAY,
04.02.96
11:03 HRS
>CHANGE DATE: A..........
>CHANGE TIME: B..........
>BACK: C..................
HOpen cover.
HSelect SYSTEM.
HSelect FACTORY SETTING.
HSelect CLOCK.
HSelect CHANGE DATE or CHANGE
TIME.
HChange the date or time with the “”
adjustment knob and confirm by
pressing the specified button.

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2.4 Settings and Adjustments
Holiday program
You may enter a duration from 1 to 99 days
and maintain a constant room temperature
between 41 and 95 ºF / 5 and 35 ºC during
this period.
The heating system maintains this
temperature day and night.
DHW production is not available during this
period.
or
Setting of program selector switch for
holiday program
The heating system resumes operation in
accordance with the switching times at the
selected switch-off time (end of program
always at 24:00 HRS on that day).
Note:
When selecting the end of the holiday
program, please bear in mind that a building
which has cooled down over a period of
days takes longer to heat up than after a
nighttime setback.
Holiday program data entry
04.02.96, 11:06
BCE/EHOLIDAY PROG.
ON - - . - - . - - , 00:00
OFF - - . - - . - - , 24.00
TEMP 14 ºC
>CHANGE: A................
>DELETE: B................
>MAIN MENU: D............
Activated holiday program
FRIDAY 04.12.96
10:42 HRS
HOLIDAY PROGRAM
FEACTIVATED UNTIL
FE04.25.96,HHH24:00 HRS
FEFBOILER TEMP.: 60 ºC
INFO: OPEN COVER
If you wish to set up the holiday program,
open the flip-down cover and locate holiday
program in the menu structure (Overview 1
on page 8).
HSelect TIME SCHEDULE.
Enter the Time and Date for the beginning
and end of holiday mode operation.
Note:
The activation point may not precede the
current point in time.
HSelect TEMP CHANGE.
Enter the desired temperature during the
holiday period via the adjustment knob
“”.
HConfirm using the appropriate key. The
holiday mode settings are thereby saved.
Erasing holiday program
HOpen flip-down cover.
HPress the appropriate key (as prompted)
and all holiday program settings are
erased.

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2.4 Settings and Adjustments
Installer set-up
Electronic programming entails making
specific adjustments which apply to your
heating system and should be undertaken by a
qualified heating contractor only. Service work
is thereby simplified as the heating contractor
can perform diagnostic and service activities
by taking sensor readings and making status
inquiries.
Altering operating program from remote (via telephone)
The manually adjusted operating program
on the Comfortrol control unit can be altered
by opening/closing an external
“potential-free” contact on the Dekamatik.
Control of the heating system is therefore
possible via a remote switch or a telephone
dialing module (optional).
Program selection is restricted to
possibilities illustrated in the table below.
The process is reversed the next time the
contact is opened.
Example:
You are not at your cottage and would like
to activate your heating system from
remote. Your call, for example, can change
the operating program from “ ”to“ ”
(see table). The selector switch on the
accessory control must be manually reset
when you leave the cottage or a new
telephone call placed to reset the
Comfortrol.
Note:
The message:
“TELE.PROG”
appears in the display (when flip-down
cover is closed) if heating system operation
has been changed via telephone.
Manually selected operating program
(operating program with open contact)
Coding 2*1 Adjusted operating program
(operating program with closed contact)
Space heating off/DHW off ------- Constant space heating on/DHW on
Space heating on/DHW on
(on timer)
0C8:001
(default)
Constant space heating off/DHW off
Space heating on/DHW on
(on timer)
0C8:000 Constant space heating on/DHW on
Space heating off/DHW on ------- Space heating off/DHW off
*1 Switching order can be altered via a coding address (consult heating contractor).

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2.4 Settings and Adjustments
Maximum temperature limit
AElectronic temperature high
limit (factory setting)
BMaximum boiler water temperature
(factory setting)
Maximum boiler water temperature limit
The Dekamatik incorporates two devices for
limiting the maximum boiler water
temperature:
- electronic temperature high limit
(factory setting 261 ºF / 127 ºC).
- adjustable high limit “”for limiting the
boiler water temperature
(factory setting 167 ºF /75ºC).
The adjustable high limit “”takes
precedence over the electronic
temperature high limit
i.e. you can only effectively influence the
maximum supply temperature below the
value set on the adjustable high limit “”.
BCE/EHEATING CURVE
SLOPE: 1.4
SHIFT: 0 ºC
MAX. LIMIT: 127 ºC
>CHANGE: A................
>BACK: C..................
>MAIN MENU: D............
Example of display for changing the
”electronic temperature high limit”
To change the maximum supply
temperature limit:
HUse selector buttons as per menu
structure (Overview 1, page 8) to select
the heating curve for the boiler
circuit.
HMake the change with the “”
adjustment knob and confirm with the
appropriate key.
Note:
When domestic hot water is being heated,
the boiler water temperature
is limited by the electronic calculation and
the adjustable high limit “”.
The maximum limit of the supply
temperature set here is not affected
by this.
Differential temperature
(only in conjunction with a Dekamatik-HK/SH heating circuit control unit)
The differential temperature is the minimum
difference by which the boiler water
temperature should exceed the highest
currently required supply temperature of the
heating circuit(s) with mixing valve.
Factory setting: 14 ºF /8ºC.
BC /EDIFF. TEMPERATURE
DIFFERENTIAL TEMP.:
REPREVIOUS: 08 ºC
RE CURRENT: 10 ºC
>CHANGE: -/+, THEN A.....
>MAINTAIN: B...............
Example of display for changing the
differential temperature
Changing the differential temperature
HUse the selection buttons as per menu
structure (Overview 1, page 8) to call up
the differential temperature.
HEnter new value and confirm.

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2.4 Settings and Adjustments
Heating curves
Function
In order to ensure that sufficient heat energy
is provided with the minimum consumption
of fuel for all outdoor temperatures, the
correct heating curve must be entered to
suit the particular characteristics of the
building and the heating system.
The heating curves determine the
relationship between outdoor temperature
and boiler water temperature or supply
temperature. Basically, the lower the
outdoor temperature, the higher the boiler
water temperature (supply temperature).
There are various heating curves:
Flat heating curves set lower boiler water
temperatures (=supply temperatures), steep
heating curves higher boiler water
temperatures (=supply temperatures).
In turn, the room temperature is dependent
on the boiler water temperature (=supply
temperature).
Setting the heating curve
Adjustable heating curves
Heating curve (factory setting)
Factory settings:
- slope = 1.4
- parallel shift = 0
The heating curves shown are based on the
following settings:
- parallel shift = 0
- selector knob “”=5 68 ºF /20ºC
With a different parallel shift setting, the
curves are adjusted in parallel along the
boiler water temperature axis, i.e. the boiler
water supply temperature is raised or
lowered by a particular value for all outdoor
temperatures.
With a different setting for “”the curves
are adjusted along the desired room
temperature axis.
The heating curve slope normally lies within
the following ranges, for example:
Heating system Range
Low temperature
heating systems (see diagram)
A
Systems with tem-
peratures
over 167 ºF /75ºC
(see diagram)
B
Normal setting:
Well insulated house in protected position
(i.e. radiator heating) Slope = 1.2
Exposed position or old heating system
(i.e. radiator heating) Slope = 1.6
Important:
Heating curve settings or adjustments
should be carried out by qualified service
personnel only.

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2.4 Settings and Adjustments
Changing the heating curve
Changing the slope of the heating curve
Changing the parallel shift of the heating
curve
Changing the slope and parallel shift of the
heating curve:
In this way you can raise or lower the boiler
water or supply temperature.
Setting ranges:
Slope: 0.2 to 3.5
Parallel shift: -13 to +40
If you want to change the setting of the
heating curve, open the cover and go
through the menu as follows:
HBOILER CIRCUIT “A” button
..............
HHEATING CURVE “B” button..............
You are now in the HEATING CURVE
menu. Follow the instructions in the menu
and enter the required heating curve.
Note:
Please consult the ”Helpful hints” on page
18 when making adjustments.
It is possible that the factory setting of the
heating curve may not give the required
room temperature at different outdoor
temperatures. In this case, adjustment of
the heating curve setting is required.
Example of an adjusted heating curve
Slope: 1.4
Parallel shift: +5
With an outdoor temperature of 32 ºF /0ºC:
Boiler water temperature
(=supply temperature)
according to diagram
on page 16: 124 ºF /51ºC
Parallel shift of heating curve: +9 ºF /+5ºC
yields a boiler water temperature
(=supply temperature) of 133 ºF /56ºC
Note:
The boiler water temperature cannot rise
above the temperature set on the adjustable
high limit “”.
Example of an adjusted heating curve

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2.4 Settings and Adjustments
Helpful hints
Alter your heating curve, if ... Type of alteration
... heat output is insufficient when
outdoor temperatures are cold, but
adequate during spring and fall
... heat output is toohighwhen
outdoor temperatures are cold, but
adequate during spring and fall
Increase the value of the “slope” to the
next level.
Decrease the value of the “slope” one
level.
... heat output during spring and fall
is inadequate, but sufficient when
outdoor temperatures are cold
... heat output during spring and fall
is too high, but sufficient when
outdoor temperatures are cold
In Figure the “parallel shift” of the
heating curve is raised one level, in
Figure the “slope” is lowered one
level.
In Figure the “parallel shift” of the
heating curve is lowered one level, in
Figure the “slope” is raised one
level.
1
2
1
2
Effects of adjusting the “ ” or “ ” knob
Example 1: Adjusting the “”dial from
68 ºFto79ºF/20ºCto26ºC
The heating curve is adjusted accordingly
along the desired room temperature axis
and thereby makes available more or less
heat through a higher or lower boiler water
temperature for the same outdoor
temperature.
ABoiler water temperature/
supply temperature in ºF /ºC
BOutdoor temperature in ºF /ºC
CDesired room temperature in ºF /ºC

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2.4 Settings and Adjustments
Lead boiler selection control
1 = 1st boiler 3560 operating hours
2 = 2nd boiler 1430 operating hours
3 = 3rd boiler 2425 operating hours
AActivation sequence 2-3-1
BDeactivation sequence 1-3-2
Example of automatic mode “”
On/off sequence of boilers in multi-boiler
systems
The sequence in which the boilers in a
multi-boiler system are activated and
deactivated is automatically determined by
the control unit (factory default). However,
the user has the ability to select a particular
sequence manually.
Automatic mode “”
Turn the lead boiler selector switch
“FK/WA” to “”→In this setting, the
control calls up the operating hours of the
individual boilers internally. The Dekamatik
then determines the activation sequence in
ascending order of the number of hours run.
The deactivation sequence is determined in
reverse order.
1 = 1st boiler
2 = 2nd boiler
3 = 3rd boiler
AActivation sequence 3-1-2
BDeactivation sequence 2-1-3
Example of manual mode “”
in switch position “III”
Manual mode “”
Turn the lead boiler selector switch “FK/WA”
to “”→Please refer to the following table
for the activation sequence for different
heating system types and boiler sequence
selector switch settings.
In each case, the deactivation sequence
follows the reverse order.
Boiler se-
quence
s
e
l
e
c
t
o
r
Activation sequence of
boilers in a
selecto
r
switch
setting
2-boiler
system
3-boiler
system
I1-2 1-2-3
II 2-1 2-3-1
III 1-2 3-1-2

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2.4 Settings and Adjustments
Default factory settings “ ” button
Press the “ ” button;
factory settings are restored
Pressing the “”button triggers
the following:
- The value of the slope of the heating
curve is set to 1.4,
- the value of the parallel shift of the heating
curve is set to 0,
- the value of the electronic temperature
high limit is set to 261 ºF / 127 ºC,
- the value of the differential temperature is
set to 14 ºF /8ºC,
- the DHW temperature = 122 ºF /50ºC,
- the party function “”is switched off
(68 ºF /20ºC),
- the energy saving function “S” is switched
off,
- the holiday program (if entered) is deleted
and the setpoint temperature (if changed)
is reset to 57 ºF /14ºC.
If you would like to change the activated
factory setting again, you can do so as
described under the headings
- “Changing the domestic hot water
temperature”,
- “Setting the party mode”,
- “Holiday program”,
- “Maximum temperature limit”,
- “Heating curve”.
Heating system shut-down
Turn
program
selector
switch to
“”
Temporary shut-down of the boiler
You can shut-down the boiler temporarily
without switching it off altogether.
HTurn program selector switch “”to
heating program “”.
The following functions are
triggered:
- For out door temperatures over
+37ºF /+3ºC:
- burner OFF,
- pump(s) OFF.
- For outdoor temperatures below
+34ºF /+1ºC:
- the boiler is operated at
the minimum boiler water
temperature,
- pump(s) ON.
Freeze-up protection is activated.
The electrical system remains
powered (live) under this scenario!
On/off switch
O=OFF
Heating system switch
Switch off the power supply to the
system/all boilers
You can shut down the entire heating
system completely and cut off the power
supply.
The built-in long-life battery ensures that the
entered settings, time, day etc. remain
stored or continue to be updated until the
next time the system is switched on.
The display on the control unit switches
off after a short time.
HDeactivate main power.
Note:
With the recommended method of
connection to the main power supply, all
boilers in the system are now switched off.
HDeactivate Dekamatik-M1 by switching
the on/off switch “”to “O”.
Deactivation of the Dekamatik does
not necessarily switch off power
supply to burner. To ensure power
supply deactivation to burner, switch
off main boiler/burner disconnect
switch and take precautions to avoid
accidental activation.