Viessmann VITOLIGNO 300-C Installation And Service Instructions Manual page 182

Function description
Control functions
(cont.)
Temperature profile 5, code "F1:5"
ϑ/°C
50
40
30
20
10
1 5 10 15 20
Fig. 113
Temperature profile 6, code "F1:6"
ϑ/°C
50
40
30
20
10
1 5 10 15 20
Fig. 114
Vacuum supply system
A vacuum system transports the pellets from the con-
nector of the room discharge or pellet silo into the pel-
let hopper on the boiler.
Supply process
When the feed motor is running, the duration of the
motor operation is recorded. The recorded time is used
to calculate the amount of pellets consumed and when
the next supply process should be started. In addition,
the pellet sensor in the pellet hopper has to confirm
that a new pellet supply is required.
If individual supply times have been configured at the
programming unit, a supply process can only be initi-
ated within the enabled times. If required, the pellet
sensor can initiate a supply process at the end of the
enabled time to completely refill the pellet hopper.
182
t/d
25 30
25 30
t/d
If the supply process was initiated, the vacuum module
is initially activated. Pellets that remain in the pipework
from the previous supply process are removed.
After this, the cycling operation for the discharge from
the pellet store is started.