Viessmann VITOTRONIC 300-K Manuel d'installation télécharger pdf (Page 79)

79

Control sequence

Code "55:0" in the "DHW" group, cyl-

inder heating

The DHW cylinder goes cold (set value

–2.5 K; adjustable via coding address

"59"):

■ The common set flow temperature is

set 20 K higher than the set DHW tem-

perature (change via coding address

"60").

The DHW cylinder is hot (set value

+2.5 K):

■ The common set flow temperature is

returned to the set weather-compen-

sated value.

■ Pump run-on:

The circulation pump runs on after cyl-

inder heating until one of the following

criteria is met:

– The weather-compensated set flow

temperature has been reached.

– The set DHW temperature is excee-

ded by 5 K.

– The set max. run-on time is reached

(coding address "62").

■ Without pump run-on (code "62:0")

Code "55:1" in the "DHW" group,

adaptive cylinder heating

With adaptive cylinder heating, the

speed of the temperature rise during

DHW heating is taken into account.

The DHW cylinder goes cold (set value

–2.5 K; adjustable via coding address

"59"):

■ The common set flow temperature is

set 20 K higher than the set DHW tem-

perature (change via coding address

"60").

The DHW cylinder is hot:

■ The control unit checks whether the

boiler will be required to supply heating

energy after the cylinder has been

heated up or whether residual boiler

heat should be transferred to the DHW

cylinder.

Accordingly, the control unit deter-

mines the burner and circulation pump

stop times to prevent the set DHW

temperature being substantially

exceeded after the cylinder has been

heated up.

Code "55:2" in the "DHW" group, cyl-

inder temperature control with 2 cyl-

inder temperature sensors

Cylinder temperature sensor 1 enables

the circulation pump for cylinder heating

and is evaluated for stop conditions dur-

ing the pump run-on time.

Cylinder temperature sensor 2:

Cylinder heating will start early if a lot of

hot water is drawn off. Cylinder heating

will terminate early if no hot water is

drawn off.

Function description, Vitotronic 100 and Vitotronic 300-K

Cylinder temperature control

(cont.)

5601 090 GB

Service

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