Buderus Logamax plus GB162 Technical Manual page 66

6 System examples
4. Maximum permissible system volume
Subject to the maximum flow temperature ϑ
determined and the MAG p
calculated in accordance with formula 1, the maximum
permissible system volume for various MAG can be
identified in the following table.
The system volume checked in accordance with point
from fig. 64 must be less than the maximum permissible
system volume . Select a larger diaphragm expansion
vessel if that is not the case.
Example 2
Flow Pre-charge
temperature ϑ
pressure p
V
[ °C] [bar]
0.75
1.00
90
1.25
1.50
0.75
1.00
80
1.25
1.50
0.75
1.00
70
1.25
1.50
0.75
1.00
60
1.25
1.50
0.75
50
1.25
1.50
0.75
1.00
40
1.25
1.50
Table 27 Maximum permissible system volume subject to the flow temperature and the required MAG pre-charge
pressure
66
to be
V
pre-charge pressure
0
18 l
Prod. no.
8 043 204 0
0
[l]
216
190
159
127
260
230
191
153
319
282
235
188
403
355
296
237
524
1.00 462
385
308
699
617
514
411
Given
• Flow temperature (
• MAG pre-charge pressure (
p = 1.00 bar
0
• System volume (
Checked
• A MAG with 18 l capacity is required (
the system volume
fig. 64 is less than the maximum permissible system
volume.
Diaphragm expansion vessel
25 l 35 l
Prod. no. Prod. no.
8 043 204 2 8 043 044
Maximum permissible system volume V
[l] [l]
300 420
265 370
220 309
176 247
361 506
319 446
266 372
213 298
443 620
391 547
326 456
261 365
560 783
494 691
411 576
329 461
727 1018
642 898
535 749
428 599
971 1360
857 1200
714 1000
571 800
6 720 645 821 (2010/09) – Logamax plus GB162
tab. 27): ϑ
= 50 °C
V
tab. 27):
fig. 64): V = 175 l
A
tab. 27), as
determined in accordance with
50 l 80 l
Prod. no. Prod. no.
8 0432 046 8 0432 048
A
[l] [l]
600 960
525 850
441 705
352 563
722 1155
638 1020
532 851
426 681
886 1417
782 1251
652 1043
522 835
1120 1792
988 1580
822 1315
658 1052
1454 2326
1284 2054
1070 1712
856 1369
1942 3107
1714 2742
1428 2284
1142 1827