Worcester 24ijunior Installation And Servicing Instructions page 6

Table 5
PRIMARY WATER CAPACITY
IP RATING (WHOLE OF BOILER)
MAXIMUM MAINS INLET PRESSURE
MINIMUM MAINS INLET PRESSURE (WORKING) FOR MAXIMUM FLOW
MINIMUM MAINS INLET PRESSURE (WORKING) FOR OPERATION
DOMESTIC HOT WATER TEMPERATURE RANGE
MAXIMUM CENTRAL HEATING FLOW TEMPERATURE
MAXIMUM CENTRAL HEATING SYSTEM SET PRESSURE
MINIMUM CENTRAL HEATING SYSTEM PRESSURE
OUTPUT TO CENTRAL HEATING & DHW
DOMESTIC HOT WATER SPECIFIC RATE -
MAXIMUM DOMESTIC HOT WATER FLOW RATE -
FLUE GAS MASS FLOW RATE
FLUE GAS TEMPERATURE °C
NOx CLASSIFICATION FOR BOTH 24i & 28i
SEDBUK NUMBER NG
SEDBUK NUMBER LPG
SEDBUK BAND*
* The value is used in the UK Government Standard Assessment Procedure [SAP] for the energy rating of dwellings. The test data from
which it has been calculated have been certified by the GASTEC notified body.
Table 6
DISCHARGE RATE l/min
TEMPERATURE RISE °C
TEMPERATURE RISE °C
Table 7
GAS SUPPLY SYSTEM - BASED ON NG (G20)
TOTAL LENGTH OF GAS SUPPLY PIPE (COPPER) metres
3 6
GAS DISCHARGE RATE - PRESSURE DROP 1 mbar. — m
8.7 5.8
18.0 12.0
Table 8
*ABOVE FLUE ELBOW
BENEATH THE APPLIANCE
IN FRONT OF APPLIANCE
RIGHT/LEFT HAND SIDE
Refer to Section 6.
* If vertical flue then 200mm above top of boiler.
** Front clearance is to a removable panel (eg. door).
Table 9
TOTAL SYSTEM VOLUME litres
INITIAL
PRESSURE bar 0.5
1.0 57
1.5 31
PERFORMANCE SPECIFICATIONS
kw
DOMESTIC HOT WATER TEMPERATURE RISE
7
24i 48
28i 56
9 12
3 /h PIPE DIAMETER mm
4.6 3.9
9.4 8.0
CLEARANCES
INSTALLATION
30
200
600
10
SYSTEM CAPACITY
INITIAL CHARGE PRESSURE bar
1.0
75
42
litres
bar
bar
bar
°C
°C
bar
bar
NATURAL GAS (G20)
LPG - PROPANE (G31)
30°C RISE l/min
40°C RISE l/min
8 9
42 37
49 44
22
28
(mm)
SERVICE
30
200
600
10
1.5
N/A
52
6
24i
3
IP 20
10
0.9
0.1
55
82 (nom)
2.5
0.5
23.5
23.5
11.2
8.4
15.2
150
Class 2
78.0
80.4
D
10
34
39
UNVENTILATED COMPARTMENT
30
200
25**
25
28i
3
IP 20
10
0.9
0.1
55
82 (nom)
2.5
0.5
27.5
27.5
13.1
9.8
17.8
150
78.9
82.1
D