Firebird Enviromax Condensing Range
3
21
3.3 - COMBI
ENVIROMAX Combi / Combipac Slimline Combi
Boiler Model C20 C26 C35 C20 C26 C35
Max Heat Output Kw 20/26 26 35 20 26 35
Btu/h (‘000) 68/89 89 119 68 89 119
CONNECTIONS
Heating Flow 22 mm 22 mm 28 mm 22 mm 22 mm 28 mm
Heating Return 22 mm 28 mm 28 mm 22 mm 22 mm 28 mm
Mains Cold Feed (Copper) 15 mm 15 mm 15 mm 15 mm 15 mm 15 mm
Hot Water Delivery (Copper) 15 mm 15 mm 15 mm 15 mm 15 mm 15 mm
Drain Off Cock
1
/
2
” Bsp.
1
/
2
” Bsp.
1
/
2
” Bsp.
1
/
2
” Bsp.
1
/
2
” Bsp.
1
/
2
” Bsp.
Safety Pressure Relief
valve outlet (Copper) 15 mm 15 mm 15 mm 15 mm 15 mm 15 mm
Condense Drain Off Connection.
White Cased
3
/
4
” Bsp.Female
3
/
4
” Bsp.Female
Heat Pac & Popular B.H.
22 mm PLASTIC 22 mm PLASTIC
Circulating Pump Head 6 metre 6 metre 6 metre 6 metre 6 metre 6 metre
Domestic Hot Water Plate
Heat Exchanger 25plate 25plate 31plate 25plate 25plate 31plate
Boiler integral Expansion 12 litres 12 litres 12 litres 12 litres 12 litres 12 litres
Vessel Normal Capacity pre-charged to 1 bar. pre-charged to 1 bar.
WATER CONTENT
Water Content Boiler
24 24 24 24 24 24
Water Content Primary Tank
(Litres) 40 40 40 11 11 11
D.H.W. GUIDE PERFORMANCE C20 C26 C35 C20 C26 C35
120 litre at 35˚C ∆t.Litres per minute
15 17 21 12 14 16
FLUE (Indoor Boilers) Concentric Flue Concentric Flue
Balanced Flue Assembly (mm) 125 (5”) 125 (5”) 125 (5”) 125 (5”) 155 (6”) 125 (5”)
Conventional flue Socket. (mm) 130 id. 130 id. 130 id. 130 id. 155 id. 130 id.
Flue Draught Reqd.(Min WG.) 0.040” 0.040” 0.040” 0.040” 0.040” 0.040”
Conventional Flue (Max WG.) 0.15” 0.15” 0.15” 0.15” 0.15” 0.15”
INTEGRAL FLUES ON HEAT PAC MODELS
TEMPERATURE CONTROL
Boiler Central Heating Control
60˚C - 80˚C+- 3˚C 60˚C - 80˚C+- 3˚C
Boiler Safety Limit 110˚C +- 3˚C 110˚C +- 3˚C
Tank (DHW)- Fixed 78˚C +- 3˚C 78˚C +- 3˚C
Early Alert - Fixed 87˚C +- 3˚C 87˚C +- 3˚C
Over-run - Fixed 93˚C +- 3˚C 93˚C +- 3˚C
HEATING SYSTEM (SEALED)
Fit in accordance with BS 7074
Part 1,BS 5449,OFTEC Standards,etc
Max.Operating Pressure 2.5 Bar 2.5 Bar
Max.System Pressure cold 1.5 Bar 1.5 Bar
Min.System Pressure cold 0.5 Bar + 0.3 Bar 0.5 Bar + 0.3 Bar
Boiler Test Pressure 4.5 Bar 4.5 Bar 4.5 Bar
Safety Valve Operating Gauge 3 Bar 3 Bar
Pressure Gauge 0 - 6 Bar 0 - 6 Bar
MAINS WATER SUPPLY Limescale excess: When over 150/200 ppm.Fit appropriate scale reducer.
Pressure Max 5 bar max (Fit pressure reducing valve as necessary)
Min 1.5 bar min. For user Comfort reduce pressure at tap to between 1.5 and 5 Bar.
WATER SIDE RESISTANCE Flow Rate To Give A Nominal Output At 10k Differential
Flow Rate Measured (Kg h
-1
) 2874.24
Waterside Resistance (mbar) 0.18
Flow Rate To Give A Nominal Output At 20k Differential
Flow Rate Measured(Kg h
-1
) 1522.92
Waterside Resistance (mbar) 0.19
Pressure Jet Oil Burners RIELLO RDB 2.2 up to C35 & RIELLO RDB 4.2 up to C58 - C73
Fuel C2 Kerosene
Electrical Supply 230v.AC 50Hz To be fused at 5amp.
Firebird Enviromax COMBI & SLIMLINE COMBITechnical Specification
Copper Pipe Not Plastic to be used for a minimum of 1 metre off the boiler
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