6
Installation and Servicing
Section 1 - General
Table 2 Performance Data - Central Heating
Gas consumption is calculated using a calorific value of
38.7 MJ/m
3
(1038 Btu/ft
3
) gross or 34.9 MJ/m
3
(935 Btu/ft
3
)
nett
To obtain the gas consumption at a different calorific value:
a. For l/s
- divide the gross heat input (kW) by the gross C.V. of
the gas (MJ/m
3
)
b. For Btu/h
- multiply the gross heat input (kW) by 26.8
c. For ft
3
/h -
divide the gross heat input (Btu/h) by the gross C.V.
of the gas (Btu/ft
3
)
d. For m
3
/h
- multiply l/s by 3.6
C
13
C
33
C
53
= A room sealed appliance designed for connection
via ducts to a horizontal or vertical terminal, which
admits fresh air to the burner and discharges the
products of combustion to the outside through
orifices which, in this case, are concentric. The fan
is up stream of the combustion chamber.
I
2H
=
An appliance designed for use on 2nd family
gas, Group H only.
* The value is used in the UK Government’s Standard Assessment Procedure (SAP) for energy rating of dwellings. The test data
from which it has been calculated have been certified by a notified body.
12 kW
15 kW
18 kW
24 kW
30 kW
Gas Supply
2H - G20 - 20 mbar
Gas Supply Connection
15 mm copper compression
Injector Size
mm
4.15
4.15
4.15
4.15
4.65
Flow Connection
Central Heating
22 mm copper compression
Return Connection
Central Heating
22 mm copper compression
Flue Terminal Diameter
mm
100
Average Flue Temp-Mass Flow Rate
56ºC - 5g/s 56ºC - 6g/s 58ºC - 8g/s 63ºC - 10g/s 69ºC - 13g/s
CO
2
Content (± 0.7)
Max. CH
9.1%
9.4%
9.3%
9.3%
9.7%
Min. CH
8.5%
8.8%
8.7%
8.4%
8.8%
Maximum Working Pressure
(Sealed Systems)
bar (psi)
2.5 (36.3)
Electrical Supply
230 V ~ 50 Hz
Power Consumption
W
16
22
25
46
50
Fuse Rating
External : 3 A Internal : T4A HRC L250 V
Water Content
Central Heating litre
(gal)
1.2 (0.26)
Packaged Weight
kg
25.1
Lift Weight
kg
21.9
Boiler Casing Size
Height mm
700
Width mm
395
Depth mm
278
Boiler Input:
12 kW
15 kW
18 kW
24 kW
30 kW
Min Max Min
Max
Min
Max
Min
Max
Min
Max
Boiler Input ‘Q’ Net CV
kW
4.9
12.1
4.9
15.1
4.9
18.1
4.9
24.3
6.1
30.4
Gross CV
kW
5.4
13.4
5.4
16.6
5.4
20.1
5.4
27.0
6.7
33.7
Gas Consumption
m
3
/h
0.500 1.246 0.500 1.537 0.500 1.872 0.500
2.512
0.623
3.136
Boiler Output :
Non Condensing
70ºC Mean Water Temp.
kW
4.8
12.0
4.8
15.0
4.8
18.0
4.8
24.2
6.1
30.3
Condensing
40ºC Mean Water Temp.
kW
5.1
13.0
5.1
15.9
5.1
19.1
5.1
25.6
6.4
31.0
Seasonal Efficiency* SEDBUK 2005
91.1%
91.2%
91.1%
91.2%
91.1%
Seasonal Efficiency* SEDBUK 2009/2012
89.4%
89.4%
89.7%
89.7%
89.6%
NOx Classification
Class 6
Table 1 General Data
