Worcester 24CDi, Installation And Servicing Instructions

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5
PERFORMANCE SPECIFICATIONS
PRIMARY WATER CAPACITY 2.0 litres
MAXIMUM MAINS INLET PRESSURE 10 bar
MINIMUM MAINS INLET PRESSURE (working) for max. hot water flow 1.2 bar
MINIMUM MAINS INLET PRESSURE (working) to operate appliance 0.7 bar
MAXIMUM CENTRAL HEATING FLOW TEMPERATURE 82°C nom
MAXIMUM CENTRAL HEATINGSYSTEM SET PRESSURE 1.5 bar
DOMESTIC HOT WATER TEMPERATURE RANGE 50 - 62°C
24CDi 28CDi 35CDi II
OUTPUT TO DOMESTIC HOT WATER NATURAL GAS (G20) 9.0 - 24 kw 9.0 - 28kw 9.5 - 35.3kw
LPG- PROPANE (G31) 9.0 - 24 kw 9.0 - 28kw 9.5 - 35.3kw
OUTPUT TO CENTRAL HEATING NATURAL GAS (G20) 9.0 - 24 kw 9.0 - 24kw 10.5 - 27.5kw
LPG - PROPANE (G31) 9.0 - 24 kw 9.0 - 24kw 10.5 - 27.5kw
DOMESTIC HOT WATER SPECIFIC RATE AT 30° RISE 11.8 l/min 13.5 l/min 16.8 l/min
MAXIMUM DOMESTIC HOT WATER FLOW RATE FROM APPLIANCE AT 40° RISE 9.0 l/min 10 l/min 12 l/min
NOx CLASSIFICATION Class 2
SEDBUK* NATURAL GAS 78.1% D 78.9% D 78.5% D
SEDBUK* LPG - PROPANE 81% D 80.7% D 80.8% D
Table 5
DOMESTIC HOT WATER - TEMPERATURE RISE
DISCHARGE RATE l/min 7 8 9 10
TEMPERATURE RISE °C 49 42.9 38.1 34.3
Table 6a (24CDi)
DOMESTIC HOT WATER - TEMPERATURE RISE
DISCHARGE RATE l/min 7 8 9 10
TEMPERATURE RISE °C 57.3 50.2 44.6 40.1
Table 6b (28CDi)
GAS SUPPLY SYSTEM - BASED ON NG (G20)
TOTAL LENGTH OF GAS SUPPLY PIPE meters
3 6 9
GAS DISCHARGE RATE m3/h PIPE DIAMETER mm
8.7 5.8 4.6 22
18.0 12.0 9.4 28
Table 7
CLEARANCES (mm)
INSTALLATION SERVICE
ABOVE APPLIANCE FLUE ELBOW 30 30
IN FRONT OF APPLIANCE 600 600
BENEATH APPLIANCE 200 200
RIGHT AND LEFT HAND SIDE 10 10
Table 8
SYSTEM CAPACITY WITH A 10 LITRE VESSEL
TOTAL SYSTEM VOLUME litres
INITIAL INITIAL CHARGE PRESSURE bar
PRESSURE bar 0.5 1.0 1.5
1.0 72 92 n/a
1.5 39 53 64
Table 9
DOMESTIC HOT WATER - TEMPERATURE RISE
DISCHARGE RATE l/min 9 10 11 12
TEMPERATURE RISE °C 57.3 50.2 44.6 40.1
Table 6c (35CDi II)
*The value is used in the UK Government Standard Assesment Proceedure (SAP) for the energy rating of dwellings. The test data from which it
has been calculated have been certified by the Gastec notified body.