Boiler Model C26 C35
Heat Output kW 20-26 26-35
Max. BTU/h (‘000) 70-90 90-120
CONNECTIONS
Heating Flow 22 mm dia. 28 mm dia.
Heating Return 1” BSP 1” BSP
Mains Cold Feed (Copper) 15 mm dia. 15 mm dia.
Hot Water Delivery (Copper) - -
Drain Off Valve
1
/
2
” BSP
1
/
2
” BSP
Safety Pressure Valve Outlet (Copper)
15 mm dia. 15 mm dia.
Condensate Trap
22 mm dia. plastic 22 mm dia. plastic
CIRCULATING PUMP 25/60 25/60
Integral Expansion Vessel Normal Capacity
12 litres 12 litres
Expansion Vessel Pre-charge Pressure 1 bar 1 bar
Low Pressure Water Switch?
Filling Loop Included?
WATER CONTENT
Boiler
24
litres
24
litres
Primary Tank
--
FLUE Integral Flue Integral Flue
HEATING SYSTEM (SEALED) Fit in accordance with BS 7074 Part 1, BS 5449, OFTEC standards and all other relevant legislation.
Max. Operating Pressure 2.5 bar
Max. System Pressure Cold 1.5 bar
Min. System Pressure Cold 0.5 bar
Preset Pressure Relief Valve 3 bar
MAINS WATER SUPPLY PRESSURE Min. 1 bar - Max. 10 bar (for user comfort, we recommend pressure at tap to be between 2 and 5 bar).
Limescale excess:When over 150/200 ppm, fit appropriate scale reducer.
WATER SIDE RESISTANCE 20kW 26kW 35kW
Flow Rate To Give A Nominal Output At 10K Differential
Flow Rate Measured 1642 kg/h 2135 kg/h 2874 kg/h
Waterside Resistance 0.18 mbar 0.18 mbar 0.18 mbar
Flow Rate To Give A Nominal Output At 20K Differential
Flow Rate Measured 870 kg/h 1131 kg/h 1523 kg/h
Waterside Resistance 0.19 mbar 0.19 mbar 0.19 mbar
PRESSURE JET OIL BURNERS Riello RDB 2.2 R
FUEL Diesel 35 Second Gas Oil
ELECTRICAL SUPPLY 230V AC 50Hz 5A
TEMPERATURE CONTROL
Boiler Central Heating Control
60˚C - 80˚C
Boiler Safety Limit 110˚C
Over-run - Fixed 87˚C
Use of copper pipe is recommended for a minimum of 1 metre off the boiler.
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