Worcester 24ijunior

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