Room temperature sensor
Part no. 7438 537
Separate room temperature sensor as supplement to the Vitotrol
300A; to be used if the Vitotrol 300A cannot be installed inside the main
living room or in a suitable position where the unit could capture and
adjust the temperature.
Installation in the main living room on an internal wall opposite radia-
tors. Never install inside shelving units, in niches, or immediately by a
door or heat source (e.g. direct sunlight, fireplace, TV set, etc.).
Connect the room temperature sensor to the Vitotrol 300A.
Connection:
■ 2-core lead with a cross-section of 1.5 mm
2
(copper)
■ Lead length from the remote control up to 30 m
■ Never route this lead immediately next to 230/400 V cables
20
80
□
Specification
Protection class
III
IP rating
IP 30 to EN 60529;
ensure through appropri-
ate design/installation
Sensor type
Viessmann NTC 10 kΩ at 25 °C
Permissible ambient temperature
– during operation
0 to +40 °C
– during storage and transport
−
20 to +65 °C
Mounting base for programming unit
Part no. 7299 408
To be able to freely position the programming unit of the control unit
anywhere outside the appliance.
To be fitted directly to the wall or a surface box.
Distance from the boiler: Observe the lead length incl. plugs of 5 m.
20
160
110
Comprising:
■ Wall mounting base with fixing materials
■ 5 m long cable with plugs
■ Cover for the control unit aperture on the boiler
Radio clock receiver
Part no. 7450 563
For receiving the DCF 77 time signal (location: Mainflingen near Frank-
furt/Main).
Radio controlled setting of time and date.
Install on an outside wall, facing the transmitter. The reception may be
reduced by metallic elements in the building structure, e.g. steel rein-
forced concrete, neighbouring buildings and sources of electro-mag-
netic interference, e.g. HV and public transport lines.
Connection:
■ 2-core lead, length up to 35 m with a cross-section of 1.5 mm
2
(cop-
per)
■ Never route this lead immediately next to 230/400 V cables.
41
66
80
Control unit
(cont.)
VITOLADENS 300-W
/
VITOLADENS 333-F
VIESMANN
61
5822 425 GB
6
