FireBird Envirogreen Combipac HE - Page 23

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3 3.3 COMBI HE & COMBIPAC HE - TECHNICAL DETAILS
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HEAT OUTPUT kW 12-20 20-26 26-35
CONNECTIONS - - -
Heating Flow 22 mm dia. 22 mm dia. 28 mm dia.
Heating Return 22 mm dia. 22 mm dia. 28 mm dia.
Mains Cold Feed (Copper) 15 mm dia. 15 mm dia. 15 mm dia.
Hot Water Delivery (Copper) 15 mm dia. 15 mm dia. 15 mm dia.
Drain Off Valve ½” BSP ½” BSP ½” BSP
Safety Pressure Valve Outlet (Copper) 15 mm dia. 15 mm dia. 15 mm dia.
Condensate Trap 22 mm dia. plastic pipe 22 mm dia. plastic pipe 22 mm dia. plastic pipe
CIRCULATING PUMP UPM 3 UPM 3 UPM 3
Domestic Hot Water Plate Heat Exchanger 25 plate 25 plate 25 plate
Integral Expansion Vessel Normal Capacity 12 litres 12 litres 12 litres
Expansion Vessel Pre-charge Pressure 1 bar 1 bar 1 bar
Low Pressure Water Switch?
✔ ✔ ✔
Filling Loop Included?
✔ ✔ ✔
WATER CONTENT - - -
Boiler 24 litres 24 litres 24 litres
Primary Tank 20 litres 20 litres 20 litres
D.H.W. GUIDE PERFORMANCE* - - -
in litres/min (120 litre draw-off at 40˚C ∆t.) 16 16 20
FLUE (INDOOR BOILERS) - - -
Balanced Flue Assembly 125 (5”) mm dia. 125 (5”) mm dia. 125 (5”) mm dia.
Max. Low Level Flue Length 1.5m 1.5m 1.5m
Max. High Level Balanced Flue Length 6m 6m 6m
HEATING SYSTEM (SEALED) Fit in accordance with BS 7074 Part 1, BS 5449, OFTEC standards and all other relevant legislation.
Max. Operating Pressure 2 bar 2 bar 2 bar
Max. System Pressure Cold 1.5 bar 1.5 bar 1.5 bar
Min. System Pressure Cold 0.5 bar 0.5 bar 0.5 bar
Preset Pressure Relief Valve 3 bar 3 bar 3 bar
MAINS WATER SUPPLY PRESSURE Min. 3 bar - Max. 5 bar (for user comfort, we recommend pressure at tap to be between 2 and 3 bar).
Limescale excess: When over 150/200 ppm, t appropriate scale reducer/water softener.
WATER SIDE RESISTANCE Flow Rate To Give A Nominal Output At 10K Differential 12-20kW 20-26kW 26-35kW
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
* where water demand exceeds this, a ow restrictor is recommended. This will ensure a water supply at an adequate temperature.
TECHNICAL SPECIFICATION