5
GAS SUPPLY SYSTEM - BASED ON NG (G20)
TOTAL LENGTH OF GAS SUPPLY PIPE (COPPER) metres
3
6
9 12
GAS DISCHARGE RATE - PRESSURE DROP mbar. m
3
/h PIPE DIAMETER mm
8.7
5.8
4.6
3.9
22
18.0
12.0
9.4
8.0
28
Table 6
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 7
SYSTEM CAPACITY
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 8
PERFORMANCE SPECIFICATIONS
PRIMARY WATER CAPACITY
2.0 litres
MAXIMUM MAINS INLET PRESSURE
10 bar
MAXIMUM CENTRAL HEATING FLOW TEMPERATURE
85°C (nom)
MAXIMUM CENTRAL HEATING SYSTEM SET PRESSURE
2.5 bar
MINIMUM CENTRAL HEATING SYSTEM SET PRESSURE
0.5 bar
OUTPUT TO CENTRAL HEATING NATURAL GAS (G20)
15SBi
6.0 - 15.0kw
24SBi
15.0 - 24.0kw
LPG - PROPANE (G31)
15SBi
6.0 - 15.0kw
24SBi
15.0 - 24.0kw
NOx CLASSIFICATION FOR BOTH 15 & 24SBi
Class 2
SEDBUK Rating
15SBi
- Band D - 79.1%
24SBi
- Band D - 78.3%
Table 5
Refer to Section 6.
