Heating circuit 1, heating circuit 2, heating circuit 3/Group. Viessmann Vitodens 200-W System

Code 1

Solar/Group "4"

(cont.)

Coding in the delivered condition

Extended control functions

20:0 No extended control functions enabled

Possible change

20:1

20:2

20:3

20:4

20:5

20:6

20:7

20:8

20:9

Auxiliary function for DHW heating

Differential temperature control 2

Differential temperature control 2 and auxiliary function

Differential temperature control 2 for central heating backup

Thermostat function

Thermostat function and auxiliary function

Solar heating via external heat exchanger without additional temperature sensor

Solar heating via external heat exchanger with additional temperature sensor

Solar heating of two DHW cylinders

Heating circuit 1, heating circuit 2, heating circuit 3/Group "5"

Select "Heating circuit ..." for weather-compensated control units (see page 41).

Select "5" for constant temperature control units (see page 41).

47

Code 1

Heating circuit 1, heating circuit 2, heating…

(cont.)

Coding

Coding in the delivered condition

DHW priority

A2:2 Cylinder priority applicable to heating circuit pump and mixer

Possible change

A2:0

A2:1

A2:3 to

A2:15

Without cylinder priority applicable to heating circuit pump and mixer

Cylinder priority only applicable to mixer

Reduced priority applied to mixer (the heating circuit receives a reduced amount of energy)

Summer eco function outside temperature

A5:5 With heating circuit pump A5:0 logic function (economy circuit): Heating circuit pump "OFF" when the outside temperature (AT)

A5:1 to

A5:15 is 1 K higher than the set room temperature (RT set

)

AT > RT set

+ 1 K (only for weather-compensated control units)

Without heating circuit pump logic function

With heating circuit pump logic function: Heating circuit pump "OFF" (see the following table)

5

6

7 to

15

2

3

4

Parameter address

A5:...

1

With heating circuit pump logic function: Heating circuit pump "OFF"

AT > RT set

+ 5 K

AT > RT set

+ 4 K

AT > RT set

+ 3 K

AT > RT set

+ 2 K

AT > RT set

+ 1 K

AT > RT set

AT > RT set

AT > RT set

- 1 K

- 9 K

48

Code 1

Heating circuit 1, heating circuit 2, heating…

(cont.)

Coding in the delivered condition

Summer eco function absolute

A6:36 Extended economy function disabled (only for weather-compensated control units)

Possible change

A6:5 to

A6:35

Extended economy control enabled, i.e. the burner and heating circuit pump will be switched OFF and the mixer closed at a variable adjustable value between 5 and 35 °C plus 1 °C. Base value is the adjusted outside temperature. This value is based on the actual outside temperature and a time constant that takes the cooling down of an average building into consideration.

Mixer eco function

A7:0 Without mixer economy function (only for a weather-compensated control unit and heating circuit with mixer)

A7:1 With mixer economy function (extended heating circuit pump logic):

Heating circuit pump also

"OFF":

■ If a mixer has been closed for longer than

20 min.

Heating pump "ON":

■ If the mixer changes to control function

■ If there is a risk of frost

Pump idle time, transition red. mode

A9:7 With pump idle time:

Heating circuit pump

"OFF" if the set value changes through a change in operating mode or through a change in the set room temperature (only for weather-compensated control units)

A9:0

A9:1 to

A9:15

Without pump idle time

With pump idle time; adjustable from 1 to 15

49

Code 1

Heating circuit 1, heating circuit 2, heating…

(cont.)

Coding in the delivered condition

Flow temperature minimum limit

C5:20 Electronic minimum flow temperature limit 20 °C

(only for weather-compensated control units)

Possible change

C5:1 to

C5:127

Minimum limit adjustable from 1 to 127 °C (limited by boiler-specific parameters)

50

Code 1

Heating circuit 1, heating circuit 2, heating…

(cont.)

Coding in the delivered condition

Flow temperature maximum limit

C6:74 Electronic maximum flow temperature limited to

74 °C (only for weathercompensated control units)

Heating program - changeover

d5:0 The external heating program changeover changes the heating program to "Constant operation with reduced room temperature" or "Standby mode" (only for weathercompensated control units)

Possible change

C6:10 to

C6:127 d5:1

Ext. heating program changeover to heating circuit

d8:0 No heating program d8:1 changeover via extension

EA1 d8:2 d8:3

Maximum limit adjustable from 10 to 127 °C (limited by boiler-specific parameters)

The external heating program changeover changes to "Constant operation with standard room temperature" (independent of coding address 3A, 3b and

3C)

Heating program changeover via input DE1 at extension EA1

Heating program changeover via input DE2 at extension EA1

Heating program changeover via input DE3 at extension EA1

Max. pump speed in standard mode

E6:...

Maximum speed of the variable speed heating circuit pump in % of the max. speed in standard mode. Value is defaulted by boiler-specific parameters (only for weathercompensated control units).

E6:0 to

E6:100

Maximum speed adjustable from 0 to 100 %

51

Code 1

Heating circuit 1, heating circuit 2, heating…

(cont.)

Coding in the delivered condition

Min. pump speed

E7:30 Minimum speed of the variable speed heating circuit pump: 30 % of the maximum speed (only for weather-compensated control units)

Screed function

F1:0 Screed drying function disabled (only for weather-compensated control units)

Possible change

E7:0 to

E7:100

F1:1 to

F1:6

F1:15

Minimum speed adjustable from 0 to 100 % of the maximum speed

Screed drying function adjustable in accordance with 6 optional temperature/time profiles (see

page 127)

Constant flow temperature

20 °C

Party mode time limit

F2:8 Time limit for party mode or external heating program changeover via key:

8 h (only for weathercompensated control units)

*1

Pump control in "Only DHW"

F6:25 In the "DHW only" operating mode, the circulation pump in the heating circuit connection set is permanently ON (only for constant temperature control units)

F2:0

F2:1 to

F2:12

F6:0

F6:1 to

F6:24

No time limit for party mode to 12h

*1

Time limit adjustable from 1

*1

In the "DHW only" operating mode, the circulation pump in the heating circuit connection set is permanently OFF

In the "DHW only" operating mode, the circulation pump in the heating circuit connection set will be started 1 to 24 times per day for

10 min respectively

*1 Party mode ends automatically in the "Heating and DHW" program, when the system changes over to operation with standard room temperature.

52

Code 1

Heating circuit 1, heating circuit 2, heating…

(cont.)

Coding in the delivered condition

Pump control in "Standby mode"

F7:25 In the "Standby" operating mode, the circulation pump in the heating circuit connection set is permanently ON (only for constant temperature control units)

Possible change

F7:0

F7:1 to

F7:24

In the "Standby" operating mode, the circulation pump in the heating circuit connection set is permanently

OFF

In the "Standby" operating mode, the circulation pump in the heating circuit connection set will be started 1 to 24 times per day for

10 min respectively

Start temperature raising

F8:-5 Temperature limit for terminating the reduced mode -5 ºC, see example

on page 130.

Observe the setting of coding address "A3" (only for weather-compensated control units)

End temperature raising

F9:-14 Temperature limit for raising the reduced set room temp. -14 ºC, see exam-

ple on page 130 (only for

weather-compensated control units)

Increase set flow temperature

FA:20 Raising the set boiler water temperature or the set flow temperature when changing from operation with reduced room temperature to operation with standard room temperature, by

20 %. See example on

page 131 (only for

weather-compensated control units)

F8:+10 to

F8:-60

F8:-61

F9:+10 to

F9:-60

FA:0 to

FA:50

Temperature limit adjustable from

+10 to -60 °C

Function disabled

Temperature limit for raising the set room temperature to the value selected for standard mode adjustable from

+10 to -60 °C

Temperature rise adjustable from 0 to 50 %

53

Code 1

Heating circuit 1, heating circuit 2, heating…

(cont.)

Coding in the delivered condition

Duration set flow temperature increase

Possible change

Fb:30 Duration for raising the set boiler water temperature or the set flow temperature (see coding address "FA") 60 min.

See example on

page 131 (only for

weather-compensated control units)

Fb:0 to

Fb:150

Duration adjustable from 0 to 300 min; one step

≙ 2 min

54