Commissioning - Viessmann Vitosol-F Installation Instructions For Contractors

Installation
(cont.)
■ Braze or press fit the copper pipes in the solar cir-
cuit.
Soft solder could be weakened, particularly near the
collectors, due to the high temperatures that occur
there. Metal seal connections, locking ring fittings 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.
■ Design all connections to be resistant to pressure
and temperature (observe the maximum stagnation
temperature of the collector).
Never use:
– Teflon (inadequate glycol resistance)
Hemp connections (insufficiently gas-tight)
–
L
U
R
M
S
Fig. 14
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
G Drain valve
Flow indicator
H

Commissioning

"Vitosol-F/-FM" service instructions.
T
A
P
K
B
B
L
C
C
D
F
G
E
H
M
■ Equip the system to EN 12975 or EN ISO 9806 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
N
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
15