Specification, Vitotronic 300-K - Viessmann VITODENS 200-W Technical Manual

Control units
(cont.)
Frost protection function
■ The frost protection function will be started when the outside tem-
perature drops below approx. +1 °C.
With frost protection, the heating circuit pump is switched ON and
the boiler water is maintained at a lower temperature of approx.
20 °C.
The DHW cylinder will be heated to approx. 20°C.
■ The frost protection function will be stopped when the outside tem-
perature rises above approx. +3 °C.
Summer mode
("DHW only")
One or more burners start when the DHW cylinder needs to be heated
up (controlled by the cylinder temperature controller).
Heating curve setting (slope and level)
Subject to heating system:
■ The Vitotronic controls the flow temperature of up to 2 heating cir-
cuits with mixers in weather-compensated mode
■ The Vitotronic automatically regulates the system/flow temperature
to 0 to 40 K (delivered condition 8 K) higher than the currently highest
set flow temperature
The flow temperature required to reach a specific room temperature
depends on the heating system and the thermal insulation of the build-
ing to be heated.
Adjusting the heating curves matches the system flow temperature
and the heating circuit flow temperature to these operating condi-
tions.
90
80
70
60
5
50
40
30
20
20 15 10 5
Outside temperature in °C
The upper flow temperature is limited by the temperature controller
"R" and the electronically set maximum temperature of the
Vitotronic 100 boiler control units, type HC1B.
Outside temperature sensor
Installation site:
■ North or north-west facing wall of the building
■ 2 to 2.5 m above the ground, for multi storey buildings in the upper
half of the second floor

Specification, Vitotronic 300-K

Rated voltage:
Rated frequency:
Rated current:
Power consumption:
Safety category:
IP rating:
Function:
Permissible ambient temperature
VIESMANN
54
Heating curve slope
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0 -5 -10 -15 -20 -25 -30
230 V ~
50 Hz
6 A
10 W
I
IP 20 D to EN 60529, en-
sure through design/instal-
lation
Type 1B to EN 60730-1
Connection:
■ 2-core lead, length max. 35 m with a cross-section of 1.5 mm
per.
■ Never route this lead immediately next to 230/400 V cables
6 6
4 1
Specification
IP rating
Sensor type
Permissible ambient temperature dur-
ing operation, storage and transport
Immersion temperature sensor
To capture the common flow temperature of the multi boiler system.
Inserted into the sensor well of the low loss header or secured with a
tie.
Specification
Cable length
IP rating
Sensor type
Permissible ambient temperature
– Operation
– Storage and transport
Cylinder temperature sensor
Specification
Cable length
IP rating
Sensor type
Permissible ambient temperature
– Operation
– Storage and transport
– Operation:
– Storage and transport:
Rated relay output breaking capacity:
– Heating circuit pumps or heat exchang-
er set sÖ:
– Circulation pump for cylinder heating
sA:
2
cop-
IP 43 to EN 60529; ensure
through design/installation
Viessmann NTC 10 kΩ, at
25 °C
−40 to +70 °C
5.8 m, fully wired
IP 32 to EN 60529
Viessmann NTC 10 kΩ at
25 °C
0 to +90 °C
–20 to +70 °C
5.8 m, fully wired
IP 32 to EN 60529
Viessmann NTC 10 kΩ at
25 °C
0 to +90 °C
–20 to +70 °C
0 to +40 °C for use in the
living space or boiler room
(standard ambient condi-
tions)
–20 to +65 °C
4(2) A, 230 V~
4(2) A, 230 V~
VITODENS 200-W