Technical Data - Bosch Worcester 15SBi Installation And Servicing Instructions

3. Technical Data

Table 1. 15SBi
NOMINAL BOILER RATINGS (10 Minutes After Lighting)
BOILER ADJUSTED FOR G20 (Natural Gas)
OUTPUT INPUT (Net)
kW kW
6 6.93
10.8 12
15 16.65
BOILER ADJUSTED FOR G31 (Propane)
6 6.93
10.8 12
15 16.65
Natural Gas: Net Input = Gross Input x 0.901
Table 2.
HORIZONTAL FLUE
WALL HOLE DIAMETER
STANDARD FLUE
EXTENDED FLUE
FLUE ASSEMBLY DIAMETER
Table 3
MAXIMUM AVAILABLE PUMP HEAD
BOILER OUTPUT HEAD
kW Metres
6.0 5.7
15.0 3.8
24.0 2
Table 4
MECHANICAL SPECIFICATIONS
CENTRAL HEATING FLOW - COMPRESSION
RETURN - COMPRESSION
COLD WATER INLET - COMPRESSION
CYLINDER FLOW - COMPRESSION
GAS INLET
RELIEF VALVE DISCHARGE - COMPRESSION
CASING HEIGHT
CASING WIDTH
CASING DEPTH
WEIGHT - LIFT
WEIGHT - PACKAGED
BURNER
GAS RATE
PRESSURE
m bar. m 3 /h
1.6 0.73
6.4 1.27
12 1.76
4.3 0.28
13.9 0.49
28.6 0.68
FLUE DETAILS
FLOW/RETURN
MIN. FLOW RATE
DIFFERENTIAL
L/min. °C
7.8 11
19.5 11
27 12.7
15SBi 35kg
15SBi 42kg
The data plate is fixed to the inner casing cover.
Table 1. 24SBi
NOMINAL BOILER RATINGS (10 Minutes After Lighting)
BOILER ADJUSTED FOR G20 (Natural Gas)
OUTPUT INPUT (Net)
kW
15
19.5
24
BOILER ADJUSTED FOR G31 (Propane)
15
19.5
24
LPG (Propane): Net Input = Gross Input x 0.922
EXTERNAL FIX
INTERNAL FIX
MINIMUM LENGTH
MAXIMUM LENGTH
MAXIMUM LENGTH
22mm
22mm
15mm
22mm
Rp 3 ⁄
4
15mm
850mm
450mm
365mm
24SBi 37kg
24SBi 44kg
4
BURNER
PRESSURE
kW m bar.
17.5 4.5
22.1 8
27 12.5
17.5 13.5
22.1 22.5
27 35.5
mm
110
150
100
725
4000
100
GAS RATE
m 3 /h
1.85
2.34
2.86
0.72
0.9
1.1