7
2.1 Central Heating Excel 25 Excel 29
Heat input (kW) 20.00 25.00
Maximum heat output (kW) 60/80°C 19.50 24.45
Minimum heat output (kW) 60/80°C 4.91 5.90
Maximum heat output (kW) 30/50°C 20.84 26.23
Minimum heat output (kW) 30/50°C 5.36 6.40
Minimum working pressure 0.25-0.45 bar
Maximum working pressure 2.5 bar
Minimum ow rate 350 l/h
2.2 Domestic Hot Water Excel 25 Excel 29
Heat input (kW) 25.00 29.00
Flow Rate: ΔT35°C 10.20 l/min 12.0 l/min
Maximum inlet pressure 6 bar
Minimum inlet pressure 0.15 bar
Minimum ow rate 2 l/min
2.3 Gas Pressures Excel 25 Excel 29
Inlet pressure (G20) 20.0 mbar 20.0 mbar
Heating maximum gas rate (m3/hr) 2.12 2.64
DHW maximum gas rate (m3/hr) 2.64 3.07
Minimum gas rate (m3/hr) 0.53 0.63
Injector size (mm) 5.1 5.6
Silencer ange (ø mm) (tted) 31 -
2.4 Expansion Vessel Excel 25 Excel 29
Capacity 8 litres
Maximum system volume 74 litres
Pre-charge pressure 1 bar
2.5 Dimensions Excel 25 Excel 29
Height (mm) 715
Width (mm) 405
Depth (mm) 250
Dry weight (kg) 28 29
2.6 Clearances Excel 25 Excel 29
Sides 12mm
Top 150mm from casing or 25mm above ue elbow (whichever is applicable)
Bottom 150mm
Front 600mm
2.7 Connections Excel 25 Excel 29
Flow & return 22mm
Gas 15mm
DHW hot & cold 15mm
Safety valve 15mm
Condense
21mm
2.8 Electrical Excel 25 Excel 29
Power consumption (Watts) 110 119
Voltage (V/Hz) 230/50
Internal fuse 3.15A T (for PCB) - 3.15A F (for connections block)
External fuse 3A
2.9 Flue Details (concentric 60-100) Excel 25 Excel 29
Maximum horizontal ue length (60/100mm) 5.85m 4.85m
Maximum vertical ue length (60/100mm) 6.85m 5.85m
2.9A Flue Details (concentric 80-125) Excel 25 Excel 29
Maximum horizontal ue length (80/125mm) 15.3m 12.8m
Maximum vertical ue length (80/125mm) 20.3m
17.8m
2.9B Flue Details (twin pipes) Excel 25 Excel 29
Maximum horizontal ue length (80mm/80mm) 45m/45m 40m/40m
Maximum vertical ue length (80mm/80mm) 45m/45m 40m/40m
SECTION 2 - TECHNICAL DATA
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