8
Installation and Servicing
SECTION 1 - GENERAL
24 30 35
Gas supply
2H - G20 - 20mbar
Gas Supply Connection
15mm copper compression
Injector Size
mm
4.15
4.65
4.9
Inlet Connection
Domestic Hot Water
15mm copper compression
Outlet Connection
Domestic Hot Water
15mm copper compression
Flow Connection
Central Heating
22mm copper compression
Return Connection
Central Heating
22mm copper compression
Flue Terminal Diameter
mm
100
Average Flue Temp-Mass Flow Rate
(DHW)
63ºC - 11g/s
68ºC - 13g/s
73ºC - 15g/s
CO
2
Content (± 0.7)
Max. DHW
9.5%
9.3%
9.5%
Min. CH
8.8%
8.8%
8.9%
Maximum Working Pressure (Sealed Systems)
bar (lb/in
2
)
2.5 (36.3)
Maximum Domestic Hot Water Inlet Pressure
bar (lb/in
2
) (kPa)
10.0 (145) (1000)
Minimum Domestic Hot Water Inlet Pressure* bar (lb/in
2
) (kPa)
0.8 (11.6) (80)
1.3 (18.9) (130)
1.3 (18.9)** (130)
Minimum DHW Inlet Pressure to operate at 0.6bar system pressure
All Model sizes 0.5 bar
Electrical Supply
230 V ~ 50 Hz
Power Consumption
W
94
101
114
Fuse Rating
External : 3A Internal : T4A HRC L250 V
Water content
Central Heating
litre (gal)
1.2 (0.26)
Domestic Hot Water litre (gal)
0.5 (0.11)
Packaged Weight
kg
33.7
33.8
33.9
Maximum Installation Weight
kg
28.9
29
29.1
Boiler Casing Size
Height
mm
700
Width
mm 395
Depth
mm 278
Table 1 - General Data
Note.
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
Key to symbols
GB
= United Kingdom
IE
= Ireland
(Countries of destination)
PMS
= Maximum operating pressure of water
C13 C33 C53
= 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.
*Required for maximum flow rate. Boiler operates down to 2 l/min DHW delivery
** In areas of low water pressure the DHW restrictor can be removed
Maximum DHW Input :
24
30
35
Nett CV
kW
24.3
30.4
35.4
Gross CV
kW
27.0
33.7
39.3
Gas Consumption
m
3
/h 2.512 3.135
3.657
(ft
3
/h) (89)
(111)
(129)
Maximum
kW
24.2
30.3
35.3
DHW Output
DHW Flow Rate
l/min
9.9
12.4
14.5
at 35°C temp. rise.
(gpm)
(2.2)
(2.8)
(3.2)
DHW Specific Rate
l/min
11.5
14.5
16.9
(gpm) (2.5)
(3.2)
(3.7)
Boiler Input :
Max.
Min.
24 30 35
Boiler Input ‘Q’
Nett CV
kW 24.3
4.9
6.1
7.1
Gross
CV kW
27.0 5.4 6.7 7.9
Gas Consumption
m
3
/h 2.512 0.500 0.627 0.734
(ft
3
/h) (89) (17.8) (22) (25.9)
Boiler Output :
Non
Condensing kW
24.2 4.8 6.1 7.1
70
o
C Mean Water temp.
Condensing
kW
25.6 5.1 6.4 7.5
40
o
C Mean Water temp.
Seasonal efficiency*
SEDBUK 2005 91.1% 91.1% 91.1%
Seasonal efficiency*
SEDBUK 2009 89.6% 89.6% 89.6%
NOx Classification
CLASS 6
Table 2 - Performance Data - Central Heating
Table 3 - Performance Data - Domestic Hot Water
Содержание LOGIC COMBI C24
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