Viessmann VITOCELL 300-B Service Instructions Manual page 9

Cleaning the inside of the DHW cylinder
Returning the DHW cylinder to use
A
C
D E
K
F
C
B
Fig. 2
Checking connections and sensor wells for tightness on the water side
09. Use a chemical cleaning agent to remove hard
deposits that cannot be removed with a high pres-
sure cleaner.
!
10. Fully drain all cleaning agent.
11. Flush the DHW cylinder thoroughly after clean-
ing.
1. Reconnect the DHW cylinder to the pipework.
2. Insert new gaskets
and 500 l) and on cylinder cap
3. Mount flange cover
inder cap
and tighten to required torque.
G
Cylinder cap: 160 Nm
■
H
■ Flange cover: 40 Nm
K
4. Fill the DHW cylinder on the DHW side.
5. When the DHW cylinder is pressurised, retighten
the screws on flange cover
40 Nm.
6. Mount thermometer sensor
and high limit safety cut-out sensor
insulation
Commissioning, inspection, maintenance
(cont.)
Please note
Cleaning agents containing hydrochloric
acid will attack the DHW cylinder material.
Use cleaning agents suitable for stainless
steel only.
Danger
Cleaning agent residues can result in poi-
soning.
Always observe the information provided by
the cleaning agent manufacturer.
to flange cover
K
(for 300 and 500 l) and cyl-
F
with stainless steel circular blank
G
C , cover B , and top panel
(for 300
F
.
G
H
to a torque of
F
(where installed)
D
, thermal
E
A .
9