10
4.0 Technical Data
© Baxi Heating UK Ltd 2013
0
200 400 600 800 1000 1200
0.5
1
1.5
2
2.5
3
3.5
4
Metre (wg)
Flow Rate (l/h)
Pump - Available Head
0
5
5.5
6
4.5
4.1 (See Section 18.0 for 32 kW model)
Flue Terminal Diameter 100mm
Dimensions Projection 125mm
Outercase Dimensions
Casing Height - 700mm
Overall Height Inc Flue Elbow - 860mm
Casing Width - 390mm
Casing Depth - 300*mm
*This can be reduced to 290mm by removing the
boiler control access flap
Central Heating Primary Circuit
Pressures
bar
Safety Discharge 3
Max Operating 2.5
Min Operating 0.5
Recommended Operating Range 1-2
Pump
Available Head See graph below
Expansion Vessel - (For Central Heating only.
Integral with appliance)
bar
Min Pre-charge Pressure 0.5
(12, 15, 18, 24 & 28)
litre
Max Capacity of
CH System 100
Primary Water Content
of Boiler (unpressurised) 2.5
Connections copper tails
Gas Inlet - 22mm
Heating Flow - 22mm
Heating Return - 22mm
Pressure Relief Discharge - 15mm
Temperatures
C.H. Flow Temp (adjustable)
25°C to 80°C max (± 5°C)
NO
x
Class 5
Clearances
Above Casing 175 mm Min
Below Casing 150mm Min*
Front 450mm Min (For Servicing)
Front 5mm Min (In Operation)
L.H. Side 5mm Min
R.H. Side 5mm Min
*This is MINIMUM recommended dimension. Greater
clearance will aid installation and maintenance.
Electrical Supply 230V~ 50H
z
(Appliance must be connected to an
earthed supply)
Electrical Protection
IPX5D
Internal Fuse Rating F2L
Injector
12 model mm 3
15 model mm 3.3
18 model mm 3.6
24 model mm 4.6
28 model mm 4.9
Condensate Drain
To accept 21.5mm (
3
/
4
in) plastic waste pipe
External Fuse Rating 3A
Heat Input CH (Net) Max Min
12 model kW 12 2.1
15 model kW 15 2.2
18 model kW 18 2.6
24 model kW 24 3.5
28 model kW 28 4.1
Heat Output CH (Non-Condensing)
Max Min
12 model kW 12 2
15 model kW 15 2.1
18 model kW 18 2.5
24 model kW 24 3.4
28 model kW 28 4
Appliance Category CAT I
2H 3P
Appliance Type C
13
C
33
C
43
C
53
Heat Output CH (Condensing)
Max Min
12 model kW 12.7 2.2
15 model kW 15.9 2.3
18 model kW 19 2.8
24 model kW 25.4 3.7
28 model kW 29.6 4.3
Power Consumption
12 model W 110
15 model W 108
18 model W 125
24 model W 104
28 model W 135
Inlet Pressure (Natural Gas - G20)
mbar 20
Max Gas Rate (Natural Gas - G20)
(After 10 mins)
12 model m
3
/h 1.27
15 model m
3
/h 1.59
18 model m
3
/h 1.90
24 model m
3
/h 2.54
28 model m
3
/h 2.96
Inlet Pressure (Propane - G31)
mbar 37
NATURAL GAS ONLY !
PROPANE ONLY !
Max Gas Rate (Propane - G31)
(After 10 mins)
12 model kg/h 0.93
15 model kg/h 1.17
18 model kg/h 1.4
24 model kg/h 1.86
28 model kg/h 2.18
Weights
(12/15/18/24)
Packaged Boiler Carton 36.5kg
Installation Lift Weight 32.5kg
(28 model)
Packaged Boiler Carton 38.5kg
Installation Lift Weight 34.5kg
NOTE: All data in this section are nominal values
and subject to normal production tolerances.
SAP 2005 Seasonal Efficiency for N. G.
models is 91.1%
SAP 2005 Seasonal Efficiency for L.P.G.
models is 93.2%
SAP 2009 Annual Efficiency for N. G.
models is 89%
SAP 2009 Annual Efficiency for L.P.G.
models is 91%
This 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
has been certified by 0087.
SEDBUK Declaration
CO
2
N.G. 9.0% ± 0.7
L.P.G. 10.5% ± 1.0
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