Viessmann Dekamatik-M1 Operating Instructions Manual

Operating Instructions

Dekamatik-M1

Digital indoor/outdoor
boiler and heating system control

Dekamatik-M1

Please file in Sercice Binder

5302 682 1/98

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...................................................................................................

H Comfortrol control unit 4......................................................................................................

H Symbols in the display 4.....................................................................................................

H Setting the heating program 5...........................................................................................

H Altering room temperatures 6............................................................................................

H Altering the DHW temperature 6.......................................................................................

H Setting party mode 7............................................................................................................

H Setting energy saving mode 7...........................................................................................

H Day, date and time 7............................................................................................................

H Menu structure 8...................................................................................................................

H Time program

- Explanatory remarks 10

.....................................................................................................

- Altering the switching times 11.........................................................................................

- Calling up the switching times 11....................................................................................

- Deleting activation periods 12..........................................................................................

- Altering the date/time 12....................................................................................................

H Holiday program 13................................................................................................................

H Installer set-up 14....................................................................................................................

H Altering operating program from remote (via telephone) 14.........................................

H Maximum temperature limit 15.............................................................................................

H Differential temperature 15...................................................................................................

H Heating curves 16...................................................................................................................

H Lead boiler selection control 19...........................................................................................

H Default factory settings “ ” button 20................................................................................

H Heating system shut-down 20..............................................................................................

3 Override 3 Override Switch 21.....................................................................................................................

4 Information 4.1 Scanning Temperatures (Desired/Actual Values) and

Operating Status Information 22

.............................................................................................

H Explanation of “damped” outdoor temperature 22...........................................................

4.2 Fault Indication 23......................................................................................................................

4.3 Troubleshooting Guide 24........................................................................................................

4.4 Operating the Comfortrol Control Unit 25.............................................................................

H Operational information 25....................................................................................................

H Language selection 26...........................................................................................................

H Battery replacement 26..........................................................................................................

4.5 Settings Checklist 27..................................................................................................................

2

5302 682

2.1 Operating Controls / Display Elements

1.1 Safety

This “Attention” symbol is positioned b efore all important safety tips.
Please follow these instructions in detail to avoid property damage, personal injury, or loss of life.

H Installation

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 C 22.1
Part 1 and/or local codes.
We offer frequent installation and service
seminars to familiarize our partners with our
products. Please inquire.

H Working 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.

1

Comfortrol control unit

2

Lead boiler selection switch FK/WA.....

3

Boiler sequence selection switch

4

Burner status indicator ............................

5

On/off switch ..........................................

I=on
O=off

6

Additional feature slots
operating hour counter

7

Safety temperature high limit .............

8

Adjustable high limit .............................

9

TUV service button
(for service purposes only) TUV

10

Right flip-down cover

11

Override switch .....................................

12

Middle flip-down cover

13

Boiler code plug

= Manual operation
= Automatic operation

.......................

= provisional operation
= automatic operation

h

............

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A

Display

B

Program selection switch .......................

C

Temperature normal operation .............

D

Party button ..............................................

E

Temperature reduced operation ...........

F

Energy saving button ..............................

G

Information key (overview) ......................

H

Default factory settings ............................

K

Adjustment knob .................................

L

Selection keys , , ,.......................

M

Flip-down cover

3

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.

2.3 Control Activation

On/off switch

I=ON

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.

The initial start-up must be conducted by
the heating contractor.

H Activate main power to system.

H Activate Dekamatik-M1:

Switch “
On multi-boiler systems also switch on the
control units of the follow-up boilers.

” to “I”.

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,A 04.02.96

10:20 HRS

PROGRAM

DHW: ON
SPACE HEATING:ON

BOILER TEMP. : 62 ºC

................STÖRUNG.................

INFO: OPEN COVER

Example of a display (with cover closed)

The heating system is now ready for
operation.

4

5302 6825302 682

Symbols in the display

(

g

r

r

2.4 Settings and Adjustments

The symbols “ ” , “ ” or “ ” appear

individually or in combination

according to the current operating status of

Heating program “ ”

DHW: OFF

Space heating: OFF

No symbols are displayed

after the above data

Heating program “ ” Heating program “ ”

DHW: ON
Space heating: OFF

The symbol ” ” appears if
domestic hot water is being
heated (according to activa­tion period)

the system, i.e. depending on the program
or activation periods.

DHW: ON
Space heating: ON

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.

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 con­trol 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
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”.

ent point in time is outside the period in which domestic hot

Setting the heating program

Three heating programs can be set with the program selection switch.

Program selection switch

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

5302 682

Heating program When setting required

DHW:ON
Space heating:ON
with frost protection

Factory setting

DHW:ON
Space heating:OFF
with frost protection

DHW:OFF
Space heating:OFF
Frost protection :ON

with outdoor temperatures over +37 ºF /
+3 ºC. The system pump is switched off.

i.e. during the heating season

i.e. in summer when space heating is not re­quired

i.e. when away on holidays or during
a long period of absence

5

2.4 Settings and Adjustments

Altering room temperatures

Normal operation (i.e. during daytime)

colder warmer

Reduced operation (i.e. during
nighttime)

colder warmer

Altering the DHW temperature

SELECTED ROOM TEMP.A

PREVIOUS: 20 ºC
CURRENT: . . ºC

INFO: OPEN COVER

SELECTED ROOM TEMP.

A

PREVIOUS: 14 ºC
CURRENT: . . ºC

INFO: OPEN COVER

H Set selector knob to required

temperature.

H The previous and current room

temperatures appear immediately
in the display.

H After 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 /
5 ºC (factory setting)
Setting “3” corresponds to approx. 57 ºF /
14 ºC room temperature.
Frost protection of the heating system is
guaranteed in setting ”0”.

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:

H Select DHW.

H Select 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.

6

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Setting party mode

2.4 Settings and Adjustments

TUESDAY,

A 04.02.96

18:30 HRS

PART Y MO D E

SELECTED: 20 ºC

CHANGE PARTY TEMP:

OPEN COVER

BOILER TEMP.: 62 ºC

Setting energy saving mode

TUESDAY,

A 04.02.96

10:35 HRS

ENERGY SAVING MODE S

BOILER TEMP.: 62 ºC

INFO: OPEN COVER

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.

Note:

In the energy saving mode, the room
temperature is lowered by approx. 4_F/
2_C.

H Press “ ” button.

To change the party temperature

H Follow the instructions in the display.

To cancel the party mode:

H Press the “

mode is cancelled automatically the next
time the preset heating program switches
from reduced operation to normal
operation.

H Press “ ” button.

To cancel the energy saving mode:

H Press the “

the energy saving mode is cancelled
automatically the next time the preset
heating program switches from normal
operation to reduced operation.

” button. Otherwise, the party

” button. Otherwise,

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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7

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:

“Heating circuit” menu structure (Overview 1)

1st level

>BOILER CIRCUIT A: A.

>DHW: C..............

>SYSTEM: D..........

2nd level 3rd level

TIMER

HEATING
CURVE

MAIN MENU

H Pinpoint the information you wish to query

on the 2nd, 3rd, or 4th level (see
overview).

H Trace the necessary path through the

menu back to the first level.

SWITCHING
TIMES

HOLIDAY
PROGRAM

HEATING
CURVE

DIFFEREN­TIAL-TEMP.

TIME
SCHEDULE

DIFFERENT
DAYS

CHANGE

DELETE

SLOPE

BC.
DIFF.TEMP.

H Follow the appropriate sequence on the

control unit as described in the diagram
below.

Note:

The levels appear consecutively in the
display.

4th level

continue with

SHIFT

MAX. LIMIT

”DHW” menu structure (Overview 2)

1st level

>BC CIRCUIT A: A.....

>:BC CIRCUIT B B.....

>DHW: C..............

>SYSTEM: D..........

DHW TANK

RECIRCU­LATION PUMP

MAIN MENU

8

2nd level

3rd level

TIME
SCHEDULE

TEMPERA­TURE

OPERATING
STATUS

TIME
SCHEDULE

OPERATING
STATUS

4th level

TIME
SCHEDULE

DIFFERENT
DAYS

CHANGE
TEMP.

DHW TANK
CONDITION

TIME
SCHEDULE

DIFFERENT
DAYS

DHW CIRC. PUMP
STATUS

5302 682

”System” menu structure (Overview 3)

2.4 Settings and Adjustments

1st level

>BC CIRCUIT A: A.....

>DHW: C.............

>SYSTEM: D..........

2nd level 3rd level

FACTORY

CLOCK

SETTING

LANGUAGE/
LANGUE

OPERATING
STATUS

OUTDOOR
TEMP.

COMMON
FLOW TEMP.:

INSTALLER
SETUP

CODE PLEASE:
ABORT

MAIN MENU

CHANGE
DATE

CHANGE
TIME

ENGLISH
FRANÇAIS

BOILER TEMP.:

TEMP. BOILER 1
TEMP. BOILER 2
TEMP. BOILER 3

*1

BURNER

STAGE1/2: ON/OFF.....

OPERATION 1/2: h......

4th level

Continue with

*2

or

*3

FLUE GAS TEMP.
MAX./CURRENT:

RETURN TEMP.

*1Only to be carried out by the

1

*

heating contractor.

2

Can be selected by the heating

*

1

contractor via the coding address.

*

3

Display for 3 boilers.

*

OP. STATUS
PUMPS

SCAN 1, 2, 3:
CODING PLUG:

ASSIGNED TO
COMFORTROL

5302 682

9

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 s elected, 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

Illustration of the default factory timer program

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

10

5302 682

Altering the switching times

2.4 Settings and Adjustments

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.

- 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.

You can enter the same time program for
every day of the week or a different time
program for i ndividual days. If you do not
enter individual switching times, the control
unit will operate i n accordance with the
factory setting, i.e. room heating and
domestic hot water heating are in operation
from 6:00 to 22:00 HRS.

Heating circuit

H Select BOILER CIRCUIT.
H Select TIMES.
H Select SWITCHING TIMES.
H Select TIME SCHEDULE.
H Change the switching times with

the “
and in each case confirm by pressing
the specified button.

” adjustment knob as required

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.

DHW production

(DHW tank and DHW circulation pump)

H Select DHW.
H Select DHW TANK or

DHW CIRCULATION PUMP.

H Select SWITCHING TIMES.
H Select TIME SCHEDULE.
H Change the switching times with

the “
and in each case confirm by pressing
the specified button.

” adjustment knob as required

- 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.

Calling up the switching times

Open the cover below the display. Heating circuit

Heating circuit

H Select BOILER CIRCUIT.
H Select TIMES.
H Select SWITCHING TIMES.
H Select DIFFERENT DAYS.
H Select the day and in each case confirm

by pressing the specified button.

H Select TIME SCHEDULE.
H Change the switching times with

the “
and in each case confirm by pressing
the specified button.

H Select BOILER CIRCUIT.
H Select TIMES.
H Select SWITCHING TIMES.
H EXIT: Close cover.

” adjustment knob as required

DHW production

(DHW tank and DHW circulation pump)

H Select DHW.
H Select DHW TANK or

DHW CIRCULATION PUMP.

H Select SWITCHING TIMES.
H Select DIFFERENT DAYS.
H Select the day and in each case confirm

by pressing the specified button.

H Select TIME SCHEDULE
H Change the switching times with

the “
and in each case confirm by pressing
the specified button.

DHW production

H Select DHW.

H Select SWITCHING TIMES.
H EXIT: Close cover.

” adjustment knob as required

5302 682

11

2.4 Settings and Adjustments

Deleting activation periods

H Open cover.
H Select BOILER CIRCUIT or DHW.
H Call up the entered times via TIMES or

SWITCHING TIMES and change.

H Turn the “

counter-clockwise until “--: --” appears; the
corresponding time is now deleted.

Altering the date/time

” adjustment knob

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..................

H Open cover.
H Select SYSTEM.
H Select FACTORY SETTING.
H Select CLOCK.
H Select CHANGE DATE or CHANGE

TIME.

H Change the date or time with the “

adjustment knob and confirm by
pressing the specified button.

”

12

5302 682

Holiday program

2.4 Settings and Adjustments

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

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

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).

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).
H Select 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.

H Select TEMP CHANGE.

Enter the desired temperature during the
holiday period via the adjustment knob
“

”.

H Confirm using the appropriate key. The

holiday mode settings are thereby saved.

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.

Erasing holiday program

H Open flip-down cover.

H Press the appropriate key (as prompted)

and all holiday program settings are
erased.

INFO: OPEN COVER

5302 682

13

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 w ork
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

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 “
(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.

contact is opened.

Manually selected operating program

Coding 2

(operating program with open contact)

Space heating off/DHW off -------

Space heating on/DHW on
(on timer)

Space heating on/DHW on

0C8:001
(default)

0C8:000

(on timer)

Space heating off/DHW on -------

*1

Switching order can be altered via a coding address (consult heating contractor).

Note:

The message:
“TELE.PROG”
appears in the display (when flip-down

”to“ ”

cover is closed) if heating system operation
has been changed via telephone.

*1

Adjusted operating program

(operating program with closed contact)

Constant space heating on/DHW on

Constant space heating off/DHW off

Constant space heating on/DHW on

Space heating off/DHW off

14

5302 682

Maximum temperature limit

2.4 Settings and Adjustments

A

Electronic temperature high
limit (factory setting)

B

Maximum boiler water temperature
(factory setting)

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”

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 “
boiler water temperature
(factory setting 167 ºF /75ºC).

To change the maximum supply
temperature limit:

H Use selector buttons as per menu

structure (Overview 1, page 8) to select
the heating curve for the boiler
circuit.

H Make the change with the “

adjustment knob and confirm with the
appropriate key.

” for limiting the

”

The adjustable high limit “
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 “

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.

” takes

”.

” .

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

5302 682

Changing the differential temperature

H Use the selection buttons as per menu

structure (Overview 1, page 8) to call up
the differential temperature.

H Enter new value and confirm.

15

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.

Setting the heating curve

Adjustable heating curves

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).

The heating curves shown are based on the
following settings:

- parallel shift = 0

- selector knob “

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 “
are adjusted along the desired room
temperature axis.

The heating curve slope normally lies within
the following ranges, for example:

Heating system

Low temperature
heating systems

Systems with tem­peratures
over 167 ºF /75ºC

” =5 68 ºF /20ºC

” the curves

Range

A

(see diagram)

B

(see diagram)

Heating curve (factory setting)

Factory settings:

- slope = 1.4

- parallel shift = 0

16

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.

5302 682

Changing the heating curve

2.4 Settings and Adjustments

Changing the slope 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 o r 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:

H BOILER CIRCUIT “A” button

H HEATING 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.

Changing the parallel shift of the heating
curve

Example of an adjusted heating curve

Example of an adjusted heating curve

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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 “

”.

17

2.4 Settings and Adjustments

Helpful hints

Alter your heating curve, if ... Ty pe of alteration

... heat output is insufficient when

outdoor temperatures are cold, but

adequate during spring and fall

Increase the value o f the “slope” to the
next l evel.

... heat output is toohighwhen

outdoor temperatures are cold, but
adequate during spring and fall

... 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

Decrease the value of the “slope” one
level.

In Figure the “parallel shift” of the

1

heating curve is raised one level, in
Figure the “slope” is lowered one

2

level.

In Figure the “parallel shift” of the

1

heating curve is lowered one level, in
Figure the “slope” is raised one

2

level.

Effects of adjusting the “ ” or “ ” knob

Example 1: Adjusting the “

” dial from

68 ºFto79ºF/20ºCto26ºC

18

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.

A

Boiler water temperature/
supply temperature in ºF / ºC

B

Outdoor temperature in ºF / ºC

C

Desired room temperature in ºF / ºC

5302 682

Lead boiler selection control

r

2.4 Settings and Adjustments

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.

1 = 1st boiler 3560 operating hours
2 = 2nd boiler 1430 operating hours
3 = 3rd boiler 2425 operating hours

A

Activation sequence 2-3-1

B

Deactivation sequence 1-3-2

Example of automatic mode “

”

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.

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.

1 = 1st boiler
2 = 2nd boiler
3 = 3rd boiler

A

Activation sequence 3-1-2

B

Deactivation sequence 2-1-3

Example of manual mode “

”

in switch position “III”

5302 682

Boiler se­quence
selecto
switch
setting

Activation sequence of
boilers in a

2-boiler
system

3-boiler
system

I 1-2 1-2-3

II 2-1 2-3-1

III 1-2 3-1-2

19

2.4 Settings and Adjustments

Default factory settings “ ” button

Press the “ ” button;

factory settings are restored

Heating system shut-down

Turn
program
selector
switch to

“

Pressing the “
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 “
(68 ºF /20ºC),

- the energy saving function “S” i s switched
off,

- the holiday program (if entered) is deleted
and the setpoint temperature (if changed)
is reset to 57 ºF /14ºC.

Temporary shut-down of the boiler

You can shut-down the boiler temporarily
without switching i t off altogether.

H Turn program selector switch “

heating program “

”

” button triggers

” is switched off

” .

” to

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”.

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.

On/off switch

O=OFF

Heating system switch

20

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.

Freeze-up protection is activated.

The electrical system remains
powered (live) under this scenario!

H Deactivate main power.

Note:

With the recommended method of
connection to the main power supply, all
boilers in the system are now switched off.

H Deactivate Dekamatik-M1 by switching

the on/off switch “

Deactivation of the D ekamatik 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.

” to “O”.

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3 Override Switch

For provisional operation with fixed boiler
water temperatures:

H Open middle flip-down cover.
H Switch override “

” from “ ” to “ ”.

3 Override Switch

Override switch

= Provisional

operation

= Automatic

operation

The following functions are activated:

- control of boiler water temperature via the

adjustable high limit “

- activation of all pumps

- mixing valve(s) remain in operation

- burner activated.

H Switch back to automatic operation by

changing switch setting from “

”.

“

H Close middle flip-down cover.

”

” to

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21

4.1 Scanning Temperatures (Desired/Actual Values) and Operating Status Information

4.1 Scanning Temperatures (Desired/Actual Values) and Operating Status Information

Scanning system data

H Follow the appropriate menu structure

(Overview 1, 2 or 3 on page 8 and 9) and
press the specified button.

Scan

Differential temperature Desired value Burner (stage 1./stage 2.)

Slope Desired value System pump (SP)

Parallel shift Desired value Boiler (shunt) pump (BP)

Safety temperature high limit Desired value Individual boiler pump (IP)

Domestic hot water temperature Desired/actual value DHW tank pump (DP)

Date/time Actual value DHW recirc. pump

Outdoor temperature Actual value

Outdoor temperature (damped) Actual value

Common supply temperature*1, or Desired/actual value

Boiler water temperature

*1

Boiler temperature 1; 2; 3 Actual value

Burner operating hour counter
Stage 1 or modulating burner
Stage 2

Flue gas temperature (max.) Actual value

Flue gas temperature (current) Actual value

Return temperature Desired/actual value

*1

Only one of the two scans is possible according to the selected coding address (please consult heating contractor).

*2

If the c orresponding sensor is installed (accessory).

Desired/actual value Switch conditions

Desired/actual value

Actual value
Actual value

*2

*2

*2

Explanation of the adjusted outdoor temperature

SYSTEMEE/ESTATUSA

AOUTDOOR TEMP.: + 10 ºC
AOUTDOOR TEMP.

ADAMPED....... :+10ºC

>CONTINUE: A

.....................

>BACK: C............................

>MAIN MENU: D...................

22

Open cover and go through menu as
follows:
H SYSTEM “D” button

.......................................

H OPERATING STATUS “B” button...............

H CONTINUE “A” button...................................

The damped outdoor temperature is
calculated from the c urrent outdoor
temperature and a time constant which
takes into account the cooling
characteristics of an average building.

Note:

Remember to take account of the
plus/minus signs in front of the
temperatures.

The average outdoor temperature is the
criterion used for the heating curve. It is
calculated as follows:

Act. outdoor
temp.

Damped outdoor

+

temp.

2

Average

=

outdoor
temp.

Examples:

Actual
outdoor
temp.
in ºF / ºC

+19 - 7
+50 +10
+37 + 3

Damped
outdoor
temp.
in ºF / ºC

+27 -3
+41 +5
+18 -8

Average
outdoor
temp.
in ºF / ºC

+23 - 5
+45.5 +7.5

+27.5 -2.5
Switch off the heating system switch for
approx. 5 seconds → the average outdoor
temperature is set to the value of the actual
outdoor temperature*

*1

The value displayed takes into account
weather conditions such as wind and
sunshine as well as the wall temperature
of the building.

1

.

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4.2 Fault Indication

4.2 Fault Indication

If a fault occurs during operation of the
heating system, it will be displayed by the
control unit. The display code will indicate
the cause of the fault, and you can inform
your heating contractor accordingly. Your
heating contractor will then be able to rectify
the fault quickly and efficiently.

TUESDAY,A 04.16.96

15:20 HRS

PROGRAM

DHW: ON
SPACE HEATING : ON

BOILER TEMP.: 62 ºC
———— FAULT ————

INFO: OPEN COVER

Display of a fault (with cover closed)

Cancelling an error message

FAULT SEARCH

FAULT:

OUTDOOR TEMP.

SENSOR

>HEATG. CONTRACTOR: i

......

>ACKNOWLEDGE: A.............

Heating systems with a central fault
indicator

If an visual or audible alarm is installed,
every type of fault detected
is additionally reported.
In turn, the display on the control unit will tell
you the cause o f the fault.

TUESDAY,A 04.16.96

15:20 HRS

BOILER 1 TEMP. ºC..........

BOILER 2 TEMP. ºC..........

BOILER 3 TEMP. ºC..........

PUMPS:PPSPPPBPPPIPPP DP
———— FAULT ————

INFO: OPEN COVER

Alternative display if coding address
”0D5:000” has been changed to ”0D5:015”.

Not every “irregularity” in the system is a
defect in the Dekamatik; these are
dependent on the unit’s programming (i.e.
DHW circulation pump shut-off). In such an
instance, review prescribed settings of the
Dekamatik unit.

Using the scan function, you can read off
the error source on the display yourself and
inform your heating contractor accordingly.

Procedure:

H Open cover.

H Fault search: Press specified button.

The error i s displayed.

By pressing the “i“ button you can access
the address and telephone number of your
heating contractor if this information has
been entered by the heating contractor.
The error message is cancelled by pressing
the specified button (ACKNOWLEDGE).
However, it will re-appear at 0.00 HRS on
the following day if the fault has not been
remedied in the meantime.
Any visual or acoustic alarm installed will
likewise be re-activated at 0.00 HRS.

General fault display

5302 682

23

4.3 Troubleshooting Guide

4.3 Troubleshooting Guide

Fault Cause Corrective action

Heating system does not
activate

Burner activation does not occur
or burner fires irregularly

Burner does not activate; red
indication lamp is illuminated on
burner, burner fault is indicated
on display

Cold heating circuits
“DHW ON ” appears in
display

Boiler is operative, heating
circuits are cold

“FAULT” i s indicated in display See page 23

On/off switch “ ” of the
Dekamatik-M1 has been set to
“O”

Main power is deactivated. Activate power supply to Dekamatik-M1 and burner

Fuse in distribution circuit is
blown and deactivation has
consequently occurred

Dekamatik-M1 has been
improperly programmed

Failure of motor -controlled flue
gas damper (only on gas boil­ers with atmospheric burner)

Defective accessories Test accessories and replace as necessary

Defective Dekamatik-M1 By using the override switch “ ” and consulting your service

No fuel With oil: ensure adequate oil supply and reorder if necessary

DHW heating occurs as a
priority over space heating

Heating circuit switches are set
to shut-down mode “ ”

Switch on/off switch to “ ”

Advise heating contractor

Ensure programming and program selection switch on Comfortrol
control unit has been properly set. Make corrections accordingly.

Advise heating contractor

company, the boiler can be operated with an elevated boiler
water temperature (see page 21 “Override Switch”)

With gas: open gas valve or contact your local gas utility

(if applicable)

Attempt to restart by pressing reset button on burner. If this attempt
is also unsuccessful, contact heating contractor.

Wait until DHW heating is complete

Set heating circuit switches to automatic mode “ ”

24

5302 682

4.4 Operating the Comfortrol Control Unit

Operational information

4.4 Operating the Comfortrol Control Unit

Operating the Comfortrol control unit
when detached from boiler control

The Comfortrol can be programmed while
removed from the Dekamatik or wall mount
base (if applicable).

The following can be programmed:

-time

- date

- set-point values (desired temperatures)

- heating curves

- program schedule

- display contrast

- control unit information.

Programming necessitates opening of the
flip-down cover; the display then
automatically appears.
Any available values can now be changed
or set.
After being activated the first time, the
Comfortrol must be mounted in the control
itself for several minutes, before its
configuration settings will be adopted.

Note:

Heating system- and boiler-specific value
inquiries can only be made if the unit is
installed.
If the unit is not installed, the display clears
approx. one minute a fter the last entry.

Removal and installation of the
Comfortrol control unit

1. Deactivate the Dekamatik; switch the

on/off switch “

2. Remove control unit from the front panel
of the Dekamatik using a screw driver.
Use flat insertion slots (see Figure).

” to “0”.

Removing the Comfortrol control unit

Adjusting contrast of the d isplay

H Open the flip-down cover of the

Comfortrol control unit.

H Press the information button “i”.
H Turn adjustment knob “

desired level of contrast is found.

5302 682

5302 682

” until

Control unit information

Open flip-down cover and press the “i”
button. The menu offers assistance and
guidance to assist in operating the
Comfortrol. Follow displayed prompts.

3. Above-described settings can now be
undertaken on the Comfortrol control unit.

4. Insert and snap Comfortrol control unit
into place.

5. Activate the Dekamatik; switch the on/off
switch “

Single-handed operation

All programming and adjustments on the
Comfortrol can be performed
single-handedly.

” to “I”.

25

4.4 Operating the Comfortrol Control Unit

Language selection

LANGUAGE/LANGUEAA

>ENGLISH: A...............

>FRANCAIS: B..............

>BACK/RETOUR: D.........

Battery replacement

INFO

A

PLEASE CHANGE BATTERIES

HEATG. CONTRACTOR: i....

>ACKNOWLEDGE: A........

Two batteries are built into the rear of the
control unit.
“Fault“ appears in the display when
batteries require replacement.

If the batteries are not replaced after a
period of time, fault indication disappears.
The display no longer activates when
operation is attempted by the user.

If you wish to adjust the language, open the
flip-down cover and follow this path through
the menu:

H SYSTEM “D” button

H FACTORY SETTING “A” button..................

H LANGUAGE “C” button.................................

H select language

H Open flip-down cover.
H Replace batteries; follow these steps:

1. Turn on/off switch “
power supply to boiler room is
deactivated.

2. Remove control unit from the front panel
of the Dekamatik using a screw driver.
Use flat insertion slots (see page 25).

3. Remove battery enclosure from back of
control unit.

.......................................

” off and ensure

Changing the batteries

4. Replace batteries.
Ensure use of an alkaline battery, AAA
type.
Insert according to diagram.

5. Reinsert battery enclosure.
Reinstall control unit.

26

5302 682

4.5 Settings Checklist

4.5 Settings Checklist

Tables for entering System Settings / Equipment

All functions, their default factory settings, as well as their alternatively possible settings are outlined in this table, Ensure functions which
have been altered are checked off accordingly.

Default factory setting

Alternative possibilities

Safety temperature high limit ””

H Default setting of 248 ºF / 120 ºC

j Adjusted to ......... ºF, or ......... ºC

Adjustable high limit ””

H Default setting of 167 ºF /75ºC

j Adjusted to ......... ºF range, or ......... ºC range

Electronic high temperature limit

H Default setting of 261 ºF / 127 ºC

j Adjusted to ......... ºF, or ......... ºC

H The boiler water temperature is displayed on the control unit j The outdoor temperature is displayed on the control unit

j The boiler water temperatures of the three boilers (if three

installed) and the pump operating conditions
(Display

*1

: pump in operation)

Burner

H 2-Stage burner operation

j The burner is operated on a single-stage basis
j The burner is operated on a modulating basis

H The switching hysteresis for the burner is 7 ºF /4ºC

j The switching hysteresis matches itself automatically to the

boiler load; values are set between 11 and 22 ºF / 6 and 12 ºC;
the minimum operating time for the burner is four minutes

H If the burner is operated on a modulating basis:

Operating time of actuating drive for the burner is in the
range: 20 to 40 seconds

j Operating time of the actuating drive for the burner

in the range: j 15 to 10 seconds

in the range: j 10 to 20 seconds
in the range: j 40 to 80 seconds

H On multi-boiler systems

2-stage burners:
The burner stages are switched on and off in cascade

j The burner stages are switched on and off in parallel
j The burner stages are switched on in cascade and switched off

in parallel

H Modulating burners:

The burners are switched on and off in cascade

H Without external switching contact for changing over from

staged to modulating operation of the burner

H Without flue gas temperature sensor j With flue gas temperature sensor

H With return temperature sensor (RLS) j Without return temperature sensor (RLS)

H The minimum boiler water temperature limit is 68 ºF /20ºC j The minimum boiler water temperature limit is set to ..... ºF / ..... ºC

H If system pump is built-in:

133

The system pump is switched on continuously.
Exception:
The system pump is switched off for domestic
hot water heating with priority control.

*1

SP = system pump, BP = boiler (shunt) pump, IP = individual boiler pump, DP = DHW tank pump

5302 682

j The burners are switched on in cascade and switched off in

parallel

j With external switch contact for changing over from staged to

modulating operation of the burner

j The system pump is switched on demand.

Exceptions:

- The system pump is switched off for domestic hot water
heating with priority control despite a possible heat demand
for room heating.

- The system pump is switched on when there is a risk of
freezing, even if no heat is required for room heating.

- When the system is shut down for a long period, the
system pump is switched on for approx. five seconds
every 24 hours to prevent the pump from seizing up.

27

4.5 Settings Checklist

Default factory setting Alternative possibilities

H If boiler (shunt) pump is utilized:

The boiler (shunt) pump switches on when the boiler water tem­perature falls below the minimum value

Boiler isolation valve

H Off delay for boiler (shunt) pump and for boiler isolation valve:

10 minutes

Weather-dependent blocking

H Weather-dependent blocking of lag boilers is not

activated

H Automatic boiler sequence control (only when lead boiler

selector switch “FK/WA” is in setting “ ”)
Automatic change of boiler sequence takes
place after 1000 hours run of the first stage burner or of the
basic load stage of the first boiler

Domestic hot water heating

H Without DHW priority control:

The system pump pump remains activated during
DHW production

20 B

45

133

j The boiler (shunt) pump switches on when the boiler is released

j Off delay for boiler (shunt) pump and for boiler isolation valve:

......... minutes

j Weather-dependent blocking is activated when the actual and

the damped outdoor temperature is at least 2 ºF /1ºC higher

than the entered value ........ ºF / ........ ºC

j Automatic change of on/off sequence of the boilers takes

place after ........ hours run

j With DHW priority over the circuit pump(s):

The system pump is switched off during

133

DHW production;
it is not switched on again until the DHW pump
for DHW tank is switched off (see also

21

the following changes)

H Adjustment range of DHW tank temperature is

50 to 140 ºF /10to60ºC

H A call for heat for DHW production causes activation of the

DHW pump only after the boiler water temperature is approx.

13 ºF /7ºC above the DHW tank setpoint temperature.

H After DHW production is complete, the DHW pump continues to

operate, until

- the temperature differential between the boiler and DHW tank
water is less than 13 ºF /7ºCor

- The DHW tank setpoint temperature is exceeded by
13 ºF /7ºCor

- the calculated boiler water temperature (required by outdoor
control) is reached.

The time delay for deactivation occurs for a maximum of 12
minutes.

H The boiler water temperature is approx. 36 ºF /20ºC higher

than the DHW setpoint temperature during DHW production

H “Supplementary DHW production function” is not activated.

H If supplementary DHW production function is activated:

DHW is briefly heated to a temperature of 140 ºF /60ºC

H Without remote operating program switching

(via telephone)

H Without remote operating program switching via

Dekatel-F

j Adjustment range of DHW tank temperature is

50 to 176 ºF /10to80ºC

j A call for heat for DHW production causes immediate activation

of the DHW pump

j After DHW production is complete (DHW tank setpoint tempera-

ture is reached), the DHW pump deactivates immediately

j Boiler water temperature is restricted to the adjustable high limit

setting ” ” during DHW production.

j “Supplementary DHW production function”≙brief heating of

DHW tank

........ times per day/once every ........ days

j This temperature is set to ........ ºF / ........ ºC

j With remote operating program switching (telephone contact)

j With remote operating program switching via Dekatel-F

28

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29

30

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31

Printed on environmentally friendly

(recycled and recyclable) paper.

Viessmann Manufacturing Company (U.S.) Inc.
45 Access Road
Warwick, Rhode Island • 02886 • USA
Tel. [phone] • Fax [phone]
www.viessmann-us.com • [e-mail]

32

Viessmann Manufacturing Company Inc.
750 McMurray Road
Waterloo, Ontario • N2V 2G5 • Canada
Tel. [phone] • Fax [phone]
www.viessmann.ca • [e-mail]

Technical information subject to change without notice.

5302 682