Solar expansion vessel
Design and function
With shut-off valve and fixings
A
Heat transfer medium
B
Nitrogen charge
C
Nitrogen buffer
D
Minimum safety seal 3 l
E
Safety seal
F
Delivered condition (pre-charge pressure 4.5 bar, 0.45 MPa)
G
Solar thermal system filled, without heat effect
H
At maximum pressure and the highest heat transfer medium
temperature
A solar expansion vessel is a sealed vessel where the gas space
(nitrogen charge) is separated from the space containing liquid (heat
transfer medium) by a diaphragm and the pre-charge pressure is
subject to the system height.
Specification
Expansion vessel Part no. Capacity Ø a b Connection Weight
l mm mm kg
A
7248 241 18 280 370 R ¾ 7.5
7248 242 25 280 490 R ¾ 9.1
7248 243 40 354 520 R ¾ 9.9
B
7248 244 50 409 505 R 1 12.3
7248 245 80 480 566 R 1 18.4
Note
Included in standard delivery with solar packs
Line regulating valve
Part no. ZK01 510
For hydraulically balancing solar collector arrays
■ With locking ring fitting Ø 22 mm
■ Max. operating temperature: 200 °C
■ For max. 5 collectors per row
Line regulating valve
Part no. ZK01 511
For hydraulically balancing solar collector arrays
■ With locking ring fitting Ø 22 mm
■ Max. operating temperature: 200 °C
■ For 5 to 12 collectors per row
Installation accessories
(cont.)
VITOSOL
VIESMANN
91
5822 440 GB
8
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