II
2H3P
II
2H3P
II
2H3P
BOILER SPECIFICATION 24cxi 30cxi 38cxi
Lift weight 40kg (88Ib) 41kg (91Ib) 44kg (97lb)
Total weight (installed) 44kg (97Ib) 45kg (99Ib)
47kg (103.5lb)
Gas connection Ø O.D. 15mm. copper 15mm. copper
15mm. copper
Heating flow and return connection Ø O.D. 22mm. copper 22mm. copper 22mm. copper
Domestic hot water connection Ø O.D. 15mm. copper 15mm. copper 15mm. copper
Condensate connection Ø I.D.
21.5mm. plastic 21.5mm. plastic
21.5mm. plastic
Safety valve discharge connection Ø O.D. 15mm. copper 15mm. copper 15mm. copper
Heating circuit safety valve (preset) 3 bar (43/5Ibf/in
2
) 3 bar (43/5Ibf/in
2
) 3 bar (43/5Ibf/in
2
)
Heating system minimum pressure 0.7bar (10.1Ibf/in
2
) 0.7bar (10.1Ibf/in
2
) 0.7bar (10.1Ibf/in
2
)
Maximum domestic hot water circuit 10bar (145Ibf/in
2
) 10bar (145Ibf/in
2
) 10bar (145Ibf/in
2
)
Minimum working pressure to obtain 1bar (14.5Ibf/in
2
) 1bar (29.0Ibf/in
2
) 2.5bar (36.25Ibf/in
2
)
maximum domestic flow
Minimum working pressure to obtain 0.2bar (2.9Ibf/in
2
) 0.2bar (2.9Ibf/in
2
) 0.2bar (2.9Ibf/in
2
)
domestic hot water
Specific water rate at 35° rise 9.8L/min. 12.3L/min.
15.5L/min
Minimum flow rate around the 776L/hr.
1032L/hr. 1289L/hr.
central heating circuit at 35° rise
Maximum domestic hot water temperature 62° 62° 62°
Expansion vessel capacity
8 litres (1.76 gallons) 8 litres (1.76 gallons) 8 litres (1.76 gallons)
Expansion vessel charge pressure
0.5bar (7,3Ibf/in
2
) 0.5bar (7,3Ibf/in
2
) 0.5bar (7,3Ibf/in
2
)
Electrical supply 230V~50Hz fused 3A 230V~50Hz fused 3A 230V~50Hz fused 3A
Electrical rating
180W fused 3A 180W fused 3A
180W fused 3A
EN60529 IP clasification IPX4D IPX4D
IPX4D
Internal fuse rating on main PCB 2A 2A 2A
Gas supply (governed metre only)
G20 - Natural Gas G20 - Natural Gas G20 - Natural Gas
Gas category
Inlet gas working pressure 20mbar
20mbar
20mbar
Burner % CO
2
case on 9.3 nominal 9.3 nominal 9.0 nominal
Burner % CO
2
case off 9.1 nominal 9.1 nominal 8.8 nominal
1.94 m
3
/h 2.45 m
3
/h 3.19 m
3
/h
68.4 ft
3
/h 86.3 ft
3
/h 113 ft
3
/h
0.53 m
3
/h 0.53 m
3
/h 0.71 ft
3
/h
18.7 ft
3
/h 18.7 ft
3
/h 25 ft
3
/h
Flue type C
13, C33, C53 C13, C33, C53 C13, C33, C53
NOx Class 5 Class 5 Class 5
Heat output condensing mode 20.02kW 24.7kW
32.2kW
Heat input Nett Q = kW DHW max. 24.12 min. 5 DHW max. 30.15 min. 5 DHW max. 38.42 min. 6.7
CH max. 18.31 min. 5 CH max. 23.12 min. 5 CH max. 30.15 min. 6.7
Heat output P = kW DHW max. 24.00 min. 4.95 DHW max. 30.00 min. 4.95 DHW max. 38.22 min. 6.62
CH max. 18.00 min. 4.95 CH max. 22.94 min. 4.95 CH max. 30.00 min. 6.62
SEDBUK rating Band A 90.3% Band A 90.3%
Band A 90.4%
Approximate CH max. gas rate
after 10 mins. from cold
Approximate CH min. gas rate
after 10 mins. from cold
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