Viessmann Vitocell 360-M - Page 134

Expansion vessel and heat sink in the return Expansion vessel and heat sink in the flow
The steam can spread through the flow and return.
P
B
C
D
E
A
The steam can only spread through the flow.
P
E
D
B
C
A
A
Collector
B
Safety valve
C
Solar-Divicon
D
Heat sink
E
Expansion vessel
The necessary residual cooling capacity is determined from the dif-
ferential between the steam-producing power of the collector array
and the heat dissipation of the pipework up to the connection point
for the expansion vessel and the heat sink.
Note
The "Solsec" program is available at www.viessmann.com for cal-
culating the residual cooling capacity and sizing the heat sink.
The program offers 3 options:
■ Sufficiently long, uninsulated pipework branching to the expansion
vessel
■ A sufficiently large pre-cooling vessel, in relation to the cooling
capacity
■ A correctly sized stagnation cooler
For the heat sink, standard radiators with an output calculated at
115 K are assumed. For greater clarity, the program indicates the
heating output at 75/65 °C.
Note
As contact protection, Viessmann stagnation coolers (see page 92)
are equipped with a plate without flow due to the anticipated high
temperature on the surface. If commercially available radiators are
used, protection against accidental contact must be provided. The
connections must be diffusion-proof. All components must be able to
withstand temperatures of up to 180 °C.
Specification
Output at 75/65 °C in W Cooling capacity during stagnation
in W
Liquid content in l
Stagnation cooler
– Type 21 482 964 1
– Type 33 835 1668 2
Pre-cooling vessel — 450 12
Information regarding design and operation
(cont.)
134
VIESMANN
VITOSOL
13
5822 440 GB