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Installation
(cont.)
■
Route pipes so that complete ventilation is ensured.
Install an air separator in the solar flow upstream of
the DHW cylinder.
Note
An air separator is integrated into the flow line of the
Solar-Divicon (see diagram).
■
Generally, copper lines in solar circuits are brazed or
joined by press fittings.
Soft solder could be weakened, particularly near the
collectors, due to the maximum temperatures occur-
ring there. Metal seal connections, locking ring fit-
tings or Viessmann plug-in connections with double
O-rings are the most suitable.
If other seals such as flat gaskets are used, ade-
quate glycol, pressure and temperature stability must
be guaranteed by the manufacturer.
■
Make all connections pressure and temperature
resistant (observe the maximum stagnation tempera-
ture of the collector).
Never use:
Teflon (inadequate glycol resistance)
–
–
Hemp connections (insufficiently gas-tight)
L
U
R
M
S
Fig. 7
Solar-Divicon
A
Shut-off valves
B
Non-return valves
C
Solar circuit pump
D
Air separator
E
Shut-off valve (adjusting screw above flow indica-
F
tor
)
H
Drain valve
G
Flow indicator
H
12
T
A
P
B
B
L
C
C
D
F
G
E
H
■
Equip the system to EN 12975 with an expansion
vessel, safety valve and circulation pump.
The expansion vessel must be approved to DIN
■
4807.
The diaphragms and seals of the expansion vessel
and safety valve must be suitable for the heat trans-
fer medium.
To calculate the pre-charge pressure, see the
"Vitosol" service instructions.
For operation without a Solar-Divicon, use only
■
safety valves that meet the following conditions:
–
Designed for 120 °C and up to 6 bar (0.6 MPa)
–
Letter ID "S" (solar) in the component identification
O
K
N
M
Fill valve
K
Stagnation heat sink
L
Expansion vessel
M
Drip pan
N
Collector
O
DHW cylinder
R
Cylinder temperature sensor
S
Collector temperature sensor
T
Solar control unit
U
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