Baxi Megaflo System 24 HE IE LPG, Installation & Servicing Instructions Manual

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9
© Baxi Heating UK Ltd 2011
4.0 Technical Data
4.1 Megaflo System 15, 18, 24, 28 & 32 HE IE
Flue Terminal
Diameter 100mm
Dimensions Projection 125mm
Outercase Dimensions
Casing Height - 780mm
Overall Height Inc Flue Elbow - 965mm
Casing Width - 450mm
Casing Depth - 345mm
Central Heating Primary Circuit
Pressures (Sealed Systems)
bar
Safety Discharge 3
Max Operating 2.5
Min Operating 0.5
Recommended Operating Range 1-2
For ‘Semi-Sealed’ Systems it is recommended that
the system is designed to achieve a pressure of
0.2 bar at the boiler (see Section 6.4).
Pump
Available Head See graph below
Expansion Vessel - (Integral with appliance)
bar
Min Pre-charge Pressure 0.5
litre
Max Capacity of
CH System
125
Primary Water Content
of Boiler (unpressurised)
2.5
Temperatures
Flow Temp
(adjustable)
25°C to 80°C
max
(± 5°C)
NOx Class 5
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
4.5
Clearances
Above Casing 200 mm Min
Below Casing 150 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)
*This is the MINIMUM recommended dimension. Greater
clearance will aid installation and maintenance.
Heat Input (Net) Max Min
15 model kW 15.4 4
18 model kW 18.5 4.3
24 model kW 24.7 7
28 model kW 28.9 9.7
32 model kW 32.8 9.7
Heat Output (Non-Condensing)
Max Min
15 model kW 15 3.9
18 model kW 18 4.2
24 model kW 24 6.8
28 model kW 28 9.4
32 model kW 32 9.4
Electrical Supply 230V~ 50Hz
(Appliance must be connected to an
earthed supply)
Power Consumption
15 model 130W
18 model 140W
24 model 150W
28 & 32 models 160W
Electrical Protection
IPX5D
Internal Fuse Rating
F2L
Appliance Category CAT I
2H
Inlet Pressure (Natural Gas - G20)
mbar 20
Injector (Natural Gas - G20)
15 model 4.5mm
18 model 5.7mm
24 model 7.5mm
28 model 12mm
32 model 12mm
Appliance Type
C
13
C
33
C
53
Heat Output (Condensing)
Max Min
15 model kW 16.2 4.2
18 model kW 19.4 4.5
24 model kW 25.9 7.4
28 model kW 30.3 10.2
32 model kW 34.4 10.2
Max Gas Rate (Natural Gas - G20)
(After 10 mins)
15 model m
3
/h 1.69
18 model m
3
/h 1.95
24 model m
3
/h 2.61
28 model m
3
/h 3.1
32 model m
3
/h 3.48
Condensate Drain
To accept 21.5mm (
3
/
4
in) plastic waste pipe
Heat Input (Gross) Max Min
15 model kW 17.1 4.4
18 model kW 20.5 4.8
24 model kW 27.4 7.8
28 model kW 32.1 10.8
32 model kW 36.4 10.8
External Fuse Rating 3A
Weights
15 & 18 24
Packaged Boiler Carton 52.5kg 53.5kg
Installation Lift Weight 43kg 44kg
28 & 32
Packaged Boiler Carton 54.5kg
Installation Lift Weight 45kg
Connections
copper tails
Gas Supply - 3/4”
Central Heating Flow - 3/4”
Central Heating Return - 3/4”
Pressure Relief Discharge - 1/2”