8
Installation and Servicing
SECTION 1 - GENERAL
30 35
Gas supply
2H - G20 - 20mbar
Gas Supply Connection
15mm copper compression
Injector Size
mm
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)
68ºC - 13g/s
73ºC - 15g/s
Maximum Working Pressure (Sealed Systems)
bar
2.5
Maximum Domestic Hot Water Inlet Pressure
bar
10.0
Minimum Domestic Hot Water Inlet Pressure*
bar
1.3
1.3**
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
101
114
Fuse Rating
External : 3A Internal : T4A HRC L250 V
Water content
Central Heating
litre
1.2
Domestic Hot Water litre
0.5
Packaged Weight
kg
33.8
33.9
Maximum Installation Weight
kg
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
gross or 34.9 MJ/m
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 :
30
35
Nett CV
kW
30.4
35.4
Gross CV
kW
33.7
39.3
Gas Consumption
m
3
/h 3.135 3.657
Maximum
kW
30.3
35.3
DHW Output
DHW Flow Rate
l/min
12.4
14.5
at 35°C temp. rise.
DHW Specific Rate
l/min
14.5
16.9
Boiler Input :
Max.
Min.
30
35
Boiler Input ‘Q’
Nett CV
kW 24.3
6.1
7.1
Gross CV
kW 27.0
6.7
7.9
Gas Consumption
m
3
/h 2.512 0.627 0.734
Boiler Output :
Non Condensing
kW 24.2
6.1
7.1
70
o
C Mean Water temp.
Condensing
kW 25.6
6.4
7.5
40
o
C Mean Water temp.
Seasonal efficiency*
SEDBUK 2005 91.1% 91.1%
Seasonal efficiency*
SEDBUK 2009 89.6% 89.6%
NOx Classification
CLASS 5
Table 2 - Performance Data - Central Heating
Table 3 - Performance Data - Domestic Hot Water
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