Connections; Flow And Return; Flue Outlet Connection - Bosch UT-L 1 Technical Manual

22 | Technical description
3.4

Connections

3.4.1

Flow and return

ΔT = 15 K
[kW]
> 175 ≤ 275
> 275 ≤ 465
> 465 ≤ 705
> 705 ≤ 1102
> 1102 ≤ 1722
> 1722 ≤ 2479
> 2479 ≤ 4408
> 4408 ≤ 6887
> 6887 ≤ 9918 > 9183 ≤ 13224
> 9918 ≤ 13500 > 13224 ≤ 18000
> 13500 ≤ 17633 > 18000 ≤ 19200
Table 15 Internal diameters of flow and return connections subject to design spread and rated output
1) Flanged connections designed as PN16 to DIN 2633; the internal diameters given should be taken as suggestions but can be determined
individually. Depending on the design, the flow and return connectors are restricted for certain boiler sizes.
3.4.2

Flue outlet connection

1)
Rated output
[kW]
≤ 827
> 827 ≤ 1350
> 1350 ≤ 2050
> 2051 ≤ 3307
> 3308 ≤ 5167
> 5168 ≤ 8203
> 8204 ≤ 10403
> 10404 ≤ 13227
> 13228 ≤ 16712
> 16713 ≤ 19200
Table 16 Flue outlet connection subject to the rated output
1) Actual output (according to type plate)
2) Dimensions to EN 12220
3) Recommended values; exact diameter is calculated for each specific project.
6 720 807 794 (2013/04)
At design spread and rated output
ΔT = 20 K ΔT = 30 K
[kW]
> 235 ≤ 367 > 352 ≤ 550
> 367 ≤ 620 > 550 ≤ 931
> 620 ≤ 940 > 931 ≤ 1410
> 940 ≤ 1469 > 1410 ≤ 2204
> 1469 ≤ 2296 > 2204 ≤ 3444
> 2296 ≤ 3306 > 3444 ≤ 4959
> 3306 ≤ 5877 > 4959 ≤ 8816
> 5877 ≤ 9183 > 8816 ≤ 13775
> 13775 ≤ 19200
Flue outlet internal diameter
ΔT = 40 K
[kW] [kW]
> 470 ≤ 734
> 734 ≤ 1241
> 1241 ≤ 1881
> 1881 ≤ 2938
> 2938 ≤ 4592
> 4592 ≤ 6612
> 6612 ≤ 11755
> 11755 ≤ 18367
> 18367 ≤ 19200
– –
– –
2)3)
D
1
–
DN200
DN250
DN315
DN400
DN500
DN630
DN710
DN800
DN900
DN1000
Suggested internal diameter
DN50
DN65
DN80
DN100
DN125
DN150
DN200
DN250
DN300
DN350
DN400
3)
Flue outlet D (external)
1
[mm]
213
256
322
400
503
634
711
797
894
1003
1)
UNIMAT