Specification Vitotronic 300-K - Viessmann VITODENS 200-W Type B2HA Technical Manual

Control units
(cont.)
Setting the operating programs
Frost protection monitoring (see frost protection function) for the
heating system is enabled in all operating programs.
You can select the following operating programs with the program
selectors:
■ Heating and DHW
■ Only DHW
■ Standby mode
External changeover of operating program possible for all heating
circuits together or for selected heating circuits only.
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
("Only DHW")
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 mixer in weather-compensated mode
■ The Vitotronic automatically regulates the system flow temperature
to 0 to 40 K (delivered condition 8 K) higher than the highest cur-
rently set flow temperature
The flow temperature required to reach a specific room temperature
depends on the heating system and the thermal insulation of the
building to be heated.
Adjusting the heating curves matches the system flow temperature
and the heating circuit flow temperature to these operating condi-
5
tions.
90
80
70
60
50
40
30
20
20 15 10 5
Outside temperature in °C
The upper flow temperature is limited by temperature controller "R"
and the electronically set maximum temperature of the Vitotronic 100
boiler control units, type HC1B.

Specification Vitotronic 300-K

Rated voltage:
Rated frequency:
Rated current:
Power consumption:
Protection class:
VIESMANN
82
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
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
Connection:
■ 2-core lead, length up to 35 m with a cross-section of 1.5 mm
(copper)
■ Never route this lead immediately next to 230/400 V cables.
6 6
4 1
Specification
IP rating IP 43 to EN 60529; ensure through de-
sign/installation
Sensor type Viessmann NTC 10 kΩ, at 25 °C
Permissible ambient tem-
perature during operation,
storage and transport −40 to +70 °C
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
Lead length
IP rating
Sensor type
Permissible ambient temperature
– During operation
– During storage and transport
Cylinder temperature sensor
Specification
Lead length
IP rating
Sensor type
Permissible ambient temperature
– During operation
– During storage and transport
IP rating:
Function type:
Permissible ambient temperature
2
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
IP 20 D to EN 60529; en-
sure through design/
installation
Type 1B to EN 60730-1
VITODENS 200-W