Buderus Logano plus SB325, Installation And Service Instructions Manual

Page: 9 / 40

2 About the appliance
Logano plus SB325 – 6 720 806 328 (2013/07) 9
2.12.2 Unit data
Boiler flow
1)
.
Ø VK DN R 1 ½
H
VK
mm 1178
Drain/boiler return 1
1)
Ø RK1 DN R 1 ½
H
RK1
mm 156 106
Boiler return 2
1)
Ø RK2 DN R 1 ¼
H
RK2
mm 506
Safety valve/Flow
safety line
2)
Ø VSL DN R 1
H
VSL
mm 1069
Minimum pressure switch
connection
3)
MDW DN G ¼
Condensate outlet
External diameter mm 32
H
AKO
mm 257.5 207.5
1) According to DIN 2633 PN
2) According to EN 1092-1 PN 16.
3) As a replacement for low water level limiter
Boiler size Abbreviations Unit 50 70 90 115
Rated heat input for gas
[burner output Qn (H
i
)]
Full load, max. kW 47.4 66.4 85.3 109.0
Partial load 40 % kW 19.0 26.6 34.1 43.6
Net weight kg 294 300 314 321
Water content l 237 233 250 240
Gas content l 90 120 138 142
Available draught Pa 50
1)
/subject to burner
1) Maximum recommended pressure difference
Pressure drop on the hot gas side mbar 0.43 0.50 0.59 0.77
Pressure drop on the water side mbar

Fig. 4 , page 10
Standby loss %

Fig. 5, page 10
Maximum flow temperature
2)
2) Safety limit (high limit safety cut-out). Maximum possible flow temperature = safety limit (high limit safety cut-out setting) - 18 K.
Example: Safety limit (high limit safety cut-out) = 100 °C, max. possible flow temperature = 100 - 18 = 82 °C.
°C 110
Maximum operating pressure bar 4
Boiler with CE designation CE-0085 AT 0074
Tab. 6 Unit data
Boiler size 50 70 90 115
Tab. 5 Unit data