VOKERA Vision 25C, User Instructions

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SECTION 2 - TECHNICAL DATA
2.1 Central Heating Vision 25C Vision 30C
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 flow rate 350 l/h
2.2 Domestic Hot Water Vision 25C Vision 30C
Heat input (kW) 25.00 29.00
Flow Rate: ΔT35°C 10.20 12.0
Maximum inlet pressure 6 bar
Minimum inlet pressure 0.15 bar
Minimum flow rate 2 l/min
2.3 Gas Pressures Vision 25C Vision 30C
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 flange (ø mm) (fitted) 31 -
2.4 Expansion Vessel Vision 25C Vision 30C
Capacity 8 litres
Maximum system volume 74 litres
Pre-charge pressure 1 bar
2.5 Dimensions Vision 25C Vision 30C
Height (mm) 715
Width (mm) 405
Depth (mm) 248
Dry weight (kg) 27 28
2.6 Clearances Vision 25C Vision 30C
Sides 12mm
Top 150mm from casing or 25mm above flue elbow (whichever is applicable)
Bottom 150mm
Front 600mm
2.7 Connections Vision 25C Vision 30C
Flow & return 22mm
Gas 15mm
DHW hot & cold 15mm
Safety valve 15mm
Condense 21mm
2.8 Electrical Vision 25C Vision 30C
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) Vision 25C Vision 30C
Maximum horizontal flue length (60/100mm) 5.85m 4.85m
Maximum vertical flue length (60/100mm) 6.85m 5.85m
2.9A Flue Details (concentric 80-125) Vision 25C Vision 30C
Maximum horizontal flue length (80/125mm) 15.3m 12.8m
Maximum vertical flue length (80/125mm) 20.3m 17.8m
2.9B Flue Details (twin pipes) Vision 25C Vision 30C
Maximum horizontal flue length (80mm/80mm) 45m/45m 40m/40m
Maximum vertical flue length (80mm/80mm) 45m/45m 40m/40m