Vitoligno 300-C Installation/Service
5790 980 - 04
76
Commissioning, Inspection and Maintenance
Cleaning the Intake Grille and Pellet Sensor in the Pellet Hopper
1. Open top panel
A
. Remove the 2 rear screws for
this
purpose.
2. Open tensioning toggles
B
by pushing down on
the tension toggle clip.
3. Remove cover
C
.
4. Clean pellet sensor
D
with a soft brush and inspect
for
damage.
5. Clean strainer
E
on the underside of the cover with
a soft brush or vacuum cleaner.
6. Replace the cover on the pellet hopper and secure
with tensioning toggles.
7. Remove plastic bend
G
from vacuum module
F
.
8. Clean air intake aperture
H
with a vacuum cleaner.
9. Refit plastic bend and top panel.
Lubricating Drive Chains and Drive Unit Bearings
Checking all Installed Position Switches
1. Drain the system until the pressure gauge shows “0”.
Alternatively, close the cap valve on the expansion
vessel and reduce the pressure until the pressure
gauge indicates “0”.
2. If the pre-charge pressure of the expansion vessel
is lower than the static system pressure, top up
with nitrogen until the pre-charge pressure is 1.4 to
2.9 psi (0.1 to 0.2 bar) higher than the static system
pressure.
3. Top up with water until the charge pressure of the
cooled system is at least 14.5 psi (1.0 bar), and is
1.4 to 2.9 psi (0.1 to 0.2 bar) higher than the
precharge pressure of the expansion vessel.
Maximum boiler operating pressure: 45 psi (3 bar).
Checking the Expansion Vessel and System Pressure
Note:
The expansion vessel can lose some of its charge
pressure over time. When the boiler heats up, the
pressure gauge will indicate a higher pressure. The
safety valve may also respond and discharge the
excess
pressure.
Therefore check the expansion vessel pre-charge
pressure
annually.
Check whether the installed expansion vessel is
adequate for the system water volume.
Carry out this test on a cold system.
Lubricating drive chains and drive bearings should be
completed every 3 years or after the consumption of
66,000 lb. (30,000 Kg) of pellets.
Checking all position switches should be completed annually
or after the consumption of 33,000 lb. (15,000 Kg) of pellets.
