Technical Data - Baxi Maxflow Combi WM Installation And Servicing Instructions

Appliance Type C
12
Appliance Category CAT II
Heat Input (gross) Max
C/H & DHW kW 31.1
Btu/h 106,130
Heat Output Max Min
kW 28.0 10.4
Btu/h 95,555 35,492
Gas Rate
(Natural Gas) Max
(After 10 Mins) m
3 /h 3.29
ft 3 /h 116
Burner Pressure (Natural Gas)
Room sealed panel fitted
mbar 10.6 ± 0.5
in wg 4.24 ± 0.2
Inlet Pressure (Natural Gas)
mbar 20
in wg 8
Burner Injector (Natural Gas)
18 x 1.18mm Diameter
No x Class 3
Electrical Supply 230V~ 50H z
Power Consumption 190W
External Fuse Rating 3A
Internal Fuse Rating F2A
External Controls 230V switching
Electrical Protection IP44 (IPx4D)
(Appliance must be connected to an
earthed supply)
Flue Terminal Diameter
Dimensions Projection
Connections
Gas Supply -
Central Heating Flow -
Central Heating Return -
Cold Water Mains Inlet -
DHW Flow -
Pressure Relief Discharge -
Outercase Dimensions
Casing Height -
Overall Height Inc Flue -
Casing Width -
Casing Depth -
Clearances
LH Side 20mm Min
RH Side 5mm Min
Above Casing 200mm Min
Below Casing 250mm Min
Front 450mm Min
Front 5mm Min
(In Operation)
Weights kg
Installation Lift Weight 70
Total Operational Weight 130
Central Heating Primary Circuit
C
32
Pressures
2H 3+
CH Expansion Vessel
Nominal Pre-charge
Min
Safety Discharge
11.9
Max Operating
40,610
Min Operating
Recommend Operating
Max Capacity of
CH System
Primary Water Content
Min
of Boiler
1.26
44
Recommended System
Temperature Drop
Pump
Available Head
Built In Bypass
Min Circulation Rate
(CH Primary Circuit)
e.g. TRVs all closed
Water Temperature
C.H. Flow Temp
SEDBUK Declaration For
100mm
Maxflow Combi WM
93mm
The seasonal efficiency (SEDBUK)
copper tails
22mm
22mm
This value is used in the UK Government's
22mm
Standard Assessment Procedure (SAP) for
15mm
energy rating of dwellings. The test data from
15mm
which it has been calculated have been
15mm
certified by 0051.
950mm
1080mm
600mm
450mm
(For Servicing)
l/h
bar
0.8
3
2.5
0.5
1-2
125 litres
3.2 litres
11°C 20°F
See graph below
l/h
200
(adjustable)
30° C to 82°C (± 5°C)
max
is 78.6 %
Pump - Available Head
6
5
4
3
2
1
0
0 200 400

4.0 Technical Data

DHW Circuit
Time To Raise Water Storage 50°C
13 minutes
Reheat Time 70% of storage
10 minutes
Pressures
Max Operating
Min Operating
Min Operating Pressure
at 12 l/min
Flow Rates
DHW Flow Rate
@ 30 o C Rise
DHW Flow Rate
@ 35 o C Rise
Min Working
DHW Flow Rate
Max. Flow Rate
Unvented DHW Expansion Vessel
See Section 6.8 for information
DHW Store Temp./Pressure Relief Valve
Maximum Pressure
Maximum Temperature
DHW Inlet Pressure Relief Valve
Maximum Pressure
Water Temperature
D.H.W. Flow Temp
(adjustable)
5° C to 65°C
Water Storage Volume
LPG Gases / Propane and Butane
Burner Injector 18 x 0.69mm diameter
Burner Pressure Max Rate
Propane mbar
in wg
Butane mbar
in wg
Inlet Pressures Butane
mbar
in wg 11.2
600 800 1000
bar
3.5
0.1
1.6
l/min
14
11.5
1
16 l/min.
7 bar
90°C
6 bar
(± 5°C)
max
54 litres
Min Rate
35.5 7.6
14.2 3.0
27.5 4.1
11.0 1.6
Propane
28 37
14.8
1200
7