Technical Data - Worcester 24ijunior Installation And Servicing Instructions

3. Technical Data

Table 1. 24i
NOMINAL BOILER RATINGS (10 Minutes After Lighting)
BOILER ADJUSTED FOR G20 (Natural Gas)
OUTPUT INPUT (Net)
kW kW
7.5 9.5
23.5 25.9
BOILER ADJUSTED FOR G31 (Propane)
7.5 9.5
23.5 25.9
Natural Gas: Net Input = Gross Input x 0.901
Table 2.
HORIZONTAL FLUE
WALL HOLE DIAMETER
STANDARD FLUE
EXTENDED FLUE
FLUE ASSEMBLY DIAMETER
VERTICAL FLUE
VERTICAL DUCT
TERMINAL ASSEMBLY
* NOTE : Minimum uncut length
Table 3
MAXIMUM AVAILABLE PUMP HEAD
BOILER OUTPUT HEAD
kW Metres
8 4.5
23.5 2.2
27.5 2.0
Table 4
MECHANICAL SPECIFICATIONS
CENTRAL HEATING FLOW - COMPRESSION
RETURN - COMPRESSION
COLD WATER INLET - COMPRESSION
DOMESTIC WATER FLOW - COMPRESSION
GAS INLET
RELIEF VALVE DISCHARGE
CASING HEIGHT
CASING WIDTH
CASING DEPTH
WEIGHT - LIFT
WEIGHT - PACKAGED
WEIGHT - DRY
BURNER
GAS RATE
PRESSURE
3
m bar. m /h
1.4 1.00
13.6 2.74
4.6 0.39
35.0 1.06
FLUE DETAILS
FLOW/RETURN
MIN. FLOW RATE
DIFFERENTIAL
L/min. °C
10.4 11
18.3 18
18.3 21
Table 1. 28i
NOMINAL BOILER RATINGS (10 Minutes After Lighting)
BOILER ADJUSTED FOR G20 (Natural Gas)
OUTPUT INPUT (Net)
kW
8.0
27.5
BOILER ADJUSTED FOR G31 (Propane)
8.0
27.5
LPG (Propane): Net Input = Gross Input x 0.921
EXTERNAL FIX mm
INTERNAL FIX mm
MINIMUM LENGTH mm
MAXIMUM LENGTH mm
MAXIMUM LENGTH mm
mm
MAXIMUM LENGTH mm
mm
24i 28i
22mm 22mm
22mm 22mm
15mm 15mm
15mm 15mm
3 3
Rp Rp
⁄ ⁄
4 4
15mm 15mm
600mm 600mm
400mm 440mm
325mm 325mm
22kg 23.5kg
37kg 40kg
34.7kg 37.5kg
5
BURNER
PRESSURE
kW m bar.
9.5 1.2
30.0 14.7
9.5 3.4
30.0 35.3
110
130
275/*425
725
3000
100
3000
1100
GAS RATE
3
m /h
1.00
3.17
0.39
1.23