Viessmann VITOCELL 140-E Installation And Service Instructions Manual page 8

Installation information
Product information
Cylinder capacity
750 and 950 l
Note
The unheated length of any threaded immersion
heater installed on site must be at least 100 mm.
8
(cont.)
Output
Immersion heater
Dim. a
6 kW min. 500 mm
12 kW min. 700 mm