2
BOXER
combination boiler -
Installation and Servicing
GENERAL
Gas supply
2H - G20 - 20mbar / 3P - G31 - 37 mbar
Gas Supply Connection
22mm copper
Injector size G20 Natural Gas
1.2 mm (13 x)
1.2 mm (15 x)
Inlet Connection
Domestic Hot Water
15mm copper
Outlet Connection
Domestic Hot Water
15mm copper
Flow Connection
Central Heating
22mm copper
Return Connection
Central Heating
22mm copper
Flue Terminal Diameter
mm (in)
100 (4)
Average flue temp/mass flow rate
(DHW)
122.5
o
C / 14.6g/s
124.5
o
C / 18.1g/s
Maximum Working Pressure (Sealed Systems)
bar (lb/in
2
)
3.0 (43.5)
Maximum Domestic Hot Water Inlet Pressure
bar (lb/in
2
)
10.0 (145)
Minimum Domestic Hot Water Inlet Pressure
bar (lb/in
2
)
0.5 (7)
Electrical Supply / Power consumption
230 V ~ 50 Hz. / 137 W
Fuse Rating
External : 3A Internal : 4AF 250 V
Water content
Central Heating litre (gal)
1.5 (.33)
1.6 (.35)
Domestic Hot Water
0.5 (0.11)
0.5 (0.11)
Packaged Weight
kg (lb)
38 (84)
39 (86)
Maximum Installation Weight
kg (lb)
36 ( 80)
37 (82)
Boiler Casing Size
Height mm (in)
700 (27 5/8)
750 (29 1/2)
Width mm (in)
450 (17 3/4)
Depth mm (in)
285 (11 1/4)
Table 1 - General Data
Note.
Gas consumption is calculated using a
calorific value of 37.8 MJ/m
3
(1038 Btu/ft
3
)
gross or 34 MJ/m
3
(910 Btu/ft
3
) nett at 15°C
and 1013.25 mbar.
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
)
Key to symbols
I E
= Ireland,
GB
= United Kingdom (Countries of destination)
PMS
= Maximum operating pressure of water
C
12
C
32
C
52
= 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 down
stream of the combustion chamber.
II
2H3P
= An appliance designed for use on 2nd and 3rd Family gases.
* 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.
CAUTION.
To avoid the possibility of injury during the installation, servicing or cleaning
of this appliance, care should be taken when handling edges of sheet steel components.
Table 2 - Performance Data - Central Heating and Domestic Hot Water (D.H.W.)
Boiler Input :
Max.
Min.
Max.
Min.
Nett CV
kW
26.5
12.5
31.0
14.5
(Btu/h)
(90,400)
(42,650)
(105,800)
(49,500)
Gross CV
kW
29.4
13.9
34.4
16.1
(Btu/h)
(100,300)
(47,400)
(117,300)
(54,900)
Burner Pressure
mbar
12.8
2.8
13.1
2.9
(G 20)
(in.w.c.)
( 5 1/8)
( 1 1/8)
( 5 1/4)
(1 1/8 )
Gas Consumption
l/s
0.78
0.37
0.91
0.42
(ft
3
/h)
(99.3)
(47)
(115.8)
(53.5)
Boiler Output :
kW
24.3
11.1
28
12.6
(Btu/h)
(82,900)
(37,800)
(95,500)
(43,000)
Flow Rates for
∆
T 35°C
l/min
10.0
11.5
Seasonal efficiency (SEDBUK)*
D Band [79.1]%
D Band [79.8]%
NOx Classification
Class 3
BOXER C 24
BOXER C 28
BOXER C 24
BOXER C 28
Note.
For 3rd Family gases, supply and burner pressure are given in the instructions sheet supplied with the Conversion kit.
