Viessmann Vitoligno 300-H Installation And Service Instructions For Contractors page 54

Commissioning, inspection, maintenance
Commissioning the heating system
Charging scheme 6
Rotary lock valve and pellet hopper with vacuum
module
Boiler charging via a rotary lock valve and a pellet hop-
per.
The pellet hopper is filled via a vacuum module.
Fig. 42
Outputs
Plug number
214
216
Inputs
Plug number
241
243
245
248
Charging scheme 7
Rotary lock valve and pellet hopper with vacuum
module and changeover unit
Boiler charging via a rotary lock valve and a pellet hop-
per.
The pellet hopper is filled via a vacuum module and
automatic changeover unit.
Fig. 43
54
(cont.)
Function
Motor, vacuum module
Motor, rotary lock valve
Function
Safety limit switch, silo door
Thermal contact, rotary lock valve
Thermal contact, vacuum module
Proximity switch, pellet hopper