8
Installation and Servicing
SECTION 1 - GENERAL
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 ft
3
/h
- divide the gross heat input (Btu/h)
by the gross C.V. of the gas (Btu/ft
3
)
c. 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
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.
ATLANTIC
COMBI
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
DHW
15mm copper tail
Outlet Connection
DHW
15mm copper compression
Flow Connection
CH
22mm copper compression
Return Connection
CH
22mm copper compression
Flue Terminal Diameter
mm (in)
100 (4)
Average Flue Temp-Mass Flow Rate
(DHW)
63
o
C - 11g/s
68
o
C - 13g/s
73
o
C - 15g/s
CO2 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 DHW Inlet Pressure
bar (lb/in
2
) (kPa)
10.0 (145) (1000)
Minimum DHW 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
96
98
107
Fuse Rating
External : 3A Internal : T4H HRC L250 V
Water content
CH litre (gal)
1.2 (0.26)
DHW litre (gal)
0.5 (0.11)
Packaged Weight
kg
33.7
33.7
33.8
Maximum Installation Weight
kg
29.9
29.9
30
Boiler Casing Size
Height mm
700
Width mm
395
Depth mm
285
Table 1 - General Data
*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
Max.
Min.
Boiler Input :
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%
91.1%
91%
Seasonal efficiency*
SEDBUK 2009
89%
89%
88.9%
NOx Classification
CLASS 6
24
30
35
Maximum DHW Input :
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 DHW Output
kW
24.2
30.3
35.3
DHW Flow Rate at 35º
Temp Rise
l/min
(gpm)
9.9
(2.2)
12.4
(2.8)
14.5
(3.2)
DHW Specific Rate
l/min
(gpm)
11.5
(2.5)
14.5
(3.2)
16.9
(3.7)
Table 2 - Performance Data - Central Heating
Table 3 - Performance Data - Domestic Hot Water
