Viessmann VITOTRONIC 300-K Manuel d'installation télécharger pdf (Page 80)

DHW cylinder goes cold:

■ Set value –2.5 K, adjustable via coding

address "59"

■ Actual DHW temperature at sensor 2

< set DHW temperature x factor for

start time (adjustment via coding

address "69")

The DHW cylinder is hot:

■ Set value +2.5 K

and

■ Actual DHW temperature at sensor 2

> set DHW temperature x factor for

stop time (adjustment via coding

address "68")

Code "55:3" in the "DHW" group, cyl-

inder temperature control, primary

store system

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 primary pump in the primary store

system starts.

■ The 3-way mixing valve opens and

then regulates to the specified set

value.

■ The circulation pump for cylinder heat-

ing cycles (briefly switches on and off)

until the set flow temperature has been

reached (set DHW temperature + 5 K).

Then it runs constantly.

If, during heating, the actual value falls

below the required set temperature,

the circulation pump for cylinder heat-

ing will temporarily cycle again.

The DHW cylinder is hot:

■ (Cylinder temperature sensor 1:

Actual value

≥

set value

and

cylinder temperature sensor 2:

Actual value > set value –1.5 K):

■ The common set flow temperature is

returned to the set weather-compen-

sated value.

■ The circulation pump for cylinder heat-

ing stops immediately when the

3-way mixing valve is fully opened.

■ The circulation pump for cylinder heat-

ing stops after expiry of the run-on time

that is selected via code "62".

Function description, Vitotronic 100 and Vitotronic 300-K

Cylinder temperature control

(cont.)

5601 090 GB

1 2 ... 75 76 77 78 79 80 81 82 83 84 85 ... 147 148

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Viessmann VITOTRONIC 300-K Manuel d'installation Page 80

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