Viessmann VITOCELL 300-B Service Instructions Manual page 8

Commissioning, inspection, maintenance
Filling the DHW cylinder
1. Fill the DHW cylinder on the DHW side.
Note
If the DHW cylinder is pressurised, retighten the
flange cover with a torque of 40 Nm.
The cylinder cap does not need to be retightened.
Shutting down the system
Checking the sensor wells for leaks
Checking the safety valve function
Cleaning the inside of the DHW cylinder
A
C
D E
F
C
B
Fig. 1
8
G
H
K
K
2. Check the fittings on the heating water and DHW
sides for leaks and retighten if required.
3. Check the function of the safety valves according
to the manufacturer's instructions.
01. Drain the DHW cylinder on the DHW side.
02. Remove top panel
A
500 l).
03. Remove thermal insulation
For 160 to 300 l: Flange insulation
For 500 l: Upper thermal insulation mat
04. Pull out thermometer sensor
disconnecting the spring clip to do so.
05. Pull out high limit safety cut-out sensor
ing the clamping bracket with wing screw to do so.
06. Remove flange cover
cylinder cap with stainless steel circular blank
G
H and gaskets K .
07. To prevent cleaning agents and contaminants
entering the pipework, separate the DHW cylinder
from the pipework.
08. Remove loose deposits with a high pressure
cleaner.
!
Please note
Pointed or sharp cleaning tools will damage
the cylinder interior.
Only use plastic tools to clean the inside.
and cover B (for 300 and
.
C
(where installed),
D
, remov-
E
(for 300 and 500 l) and
F