4.0 Technical Data
8
© Baxi Heating UK Limited 2005
4.1
Combi 105 HE
Flue Terminal
Diameter
100mm
Dimensions
Projection
125mm
Outercase Dimensions
Casing Height
-
780mm
Overall Height Inc Flue
Elbow
-
965mm
Casing Width
-
450mm
Casing Depth
-
345mm
Clearances
Above Casing
200 mm Min
Below Casing
200 mm Min
Front
450 mm Min
(For Servicing)
Front
5 mm Min
(In Operation)
L.H. Side
5 mm Min
R.H. Side
5 mm Min
(In Operation)
20mm Min
(See Note*)
*NOTE: The boiler can be operated with a
clearance of 5mm at the right. This is also
sufficient for routine maintenance. However a
clearance of 20mm is required if it is necessary to
remove the secondary heat exchanger. This
should be considered when siting the appliance
and in the event of any subsequent alterations in
the area of installation
Weights
kg
Packaged Boiler Carton
54
Installation Lift Weight
44
Central Heating Primary Circuit
Pressures
bar
Safety Discharge
3
Max Operating
2.5
Min Operating
0.5
Recommend Operating
1-2
DHW Circuit
bar
Pressures
Max Operating
8
Min Operating
0.2
Min Operating Pressure
at 13.2 l/min
0.96
Flow Rates
l/min
DHW Flow Rate
@ 30°C Rise
14.1
DHW Flow Rate
@ 35°C Rise
12.1
Min Working
DHW Flow Rate
2.5
Pump
Available Head
See graph below
Expansion Vessel
-
(For Central Heating
only. Integral with appliance)
bar
Min Pre-charge Pressure
0.5
litre
Max Capacity of
CH System
125
Primary Water Content
1.2
of Boiler (unpressurised)
Connections
copper tails
Gas Supply
-
22mm
Central Heating Flow
-
22mm
Central Heating Return
-
22mm
Cold Water Mains Inlet
-
15mm
DHW Flow
-
15mm
Pressure Relief Discharge
-
15mm
Temperatures
C.H. Flow Temp
(adjustable)
35°C to 85°C
max
(± 5°C)
D.H.W. Flow Temp
(adjustable)
35°C to 65°C
max
(± 5°C)
dependent upon flow rate
Heat Input CH
Max
Min
kW
30.5
11.9
Heat Output CH (Non-Condensing)
Max
Min
kW
29.6
11
Electrical Supply
230V~ 50Hz
(Appliance must be connected to an
earthed supply)
Power Consumption
180W
External Fuse Rating
3A
Internal Fuse Rating
Fuse 2A Fast Blow to BS 4265
Appliance Category
CAT II
2H 3P
Inlet Pressure
(Natural Gas - G20)
mbar
20
Burner Injector
(Natural Gas - G20)
15 x 1.25mm Diameter
Burner Pressure
(Natural Gas - G20)
Max Rate Min Rate
mbar
12.1 ± 0.5
2.1 ± 0.2
Appliance Type
C
12
C
32
NOx Class
3
Electrical Protection
IPX5D
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 have been certified by 0051.
SEDBUK Declaration For Combi 105 HE
The seasonal efficiency (SEDBUK) is 87.3% (89.4% LPG)
Band B
0
200
400
600
800
1000
1200
0.5
1
1.5
2
2.5
3
3.5
4
Metr
e (wg)
Flow Rate (l/h)
Pump - Available Head
0
5
4.5
LPG Propane - G31
Burner Injector
15 x 0.77mm diameter
Burner Pressure
Propane
mbar
Inlet Pressures
mbar
Max Rate
32.3 ± 0.5
Min Rate
5.2 ± 0.2
37
Heat Output CH (Condensing)
Max
Min
kW
31
11.3
Heat Input DHW
Max
kW
30.5
Heat Output DHW
Max
kW
29.6
Condensate Drain
1” BSP
Max Gas Rate
(Natural Gas - G20)
(After 10 mins)
m
3
/h
3.22