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 recesses, 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
Safety category
III
IP rating
IP 30 to EN 60529; ensure
through design/installation
Sensor type
Viessmann NTC 10 kΩ at
25 °C
Permissible ambient temperature
– Operation
0 to +40 °C
– Storage and transport
−20 to +65 °C
Temperature sensor
Immersion temperature sensor for DHW heating as a cylinder tem-
perature sensor (to plug 17 of the extension kit). The contact temper-
ature sensor, which is part of the standard delivery of the extension kit,
is used as a return temperature sensor (to plug 2 of the extension
kit).
The sensor well is not included in the standard delivery and must be
ordered separately.
Immersion temperature sensor
Part no. 7438 702
To capture the temperature in a sensor well.
Specification
Cable length
5.8 m, fully wired
IP rating
IP 32 to EN 60529; ensure
through design/installation
Sensor type
Viessmann NTC 10 kΩ, at
25 °C
Permissible ambient temperature
– Operation
0 to +90 °C
– Storage and transport
−20 to +70 °C
Note
Only for KM BUS mixer module
Stainless steel sensor well
Part no. 7819 693
SW24
200
R½
■ For on-site DHW cylinders
■ Part of the standard delivery of Viessmann DHW cylinders
Ecotronic control unit for Vitoligno 300-H
(cont.)
VITOLIGNO 300-H
VIESMANN
25
5672 507 GB
3