Section 2: Technical DataPage 6
2 TECHNICAL DATA
2.1 BOILER TECHNICAL DATA
Table 2-1: Boiler technical data
Units
Eco External
15/21 21/26 26/35
Water content
litre 13 13 19
gal 2.9 2.9 4.2
Weight (dry)
kg
113 (external module)
136 (external system)
113 (external module)
136 (external system)
142 (external module)
152 (external system)
lb
249 (external module)
300 (external system)
249 (external module)
300 (external system)
313 (external module)
335 (external system)
Maximum heat output (Kerosene)
kW 21.0 26.0 35.0
Btu/h 71,700 88,700 119,400
Minimum ow rate (∆T=10°C) l/h 1805 2,235 3,005
Minimum ow rate (∆T=20°C) l/h 902.5 1,117.5 1,502.5
Condensate connection 22 mm (only connect plastic pipe)
Flue diameter (conventional) 100 mm
Waterside resistance ∆T=10°C mbar 28.5
Waterside resistance ∆T=20°C mbar 10.0
Maximum static head m 28
Minimum circulating head m 1
Boiler thermostat range °C 50 to 75
Limit (safety) thermostat shut o
temperature
°C 110 ± 3
Maximum hearth temperature °C Less than 50
Electricity supply ~230 1ph 50Hz 5A fused
Burner motor power Watts 90
Absorbed motor power kW 0.15
Starting current Amps 4.20
Running current Amps 0.85
Oil connection ¼ʺ BSP male (on end of exible fuel hose)
Conventional ue draught
mbar Minimum: 0.087 - Maximum: 0.37
in wg Minimum: 0.035 - Maximum: 0.15
Maximum operating pressure -
sealed/open system
bar 2.0
Maximum operating pressure -
pressure relief valve
bar 2.0
Boiler type ON/OFF
* 125 mm diameter required for exible ue liner (Orange system). For rigid ue system, e.g. Green system, 100 mm diameter ue required. Refer to Section 9
(Flue System and Air Supply) for further details.
2.2 SEALED SYSTEM DATA
Table 2-2: Sealed System Data
Eco System 15/21, 21/26 and 26/35
Heating system pressure (cold) Maximum 1.0 bar | Minimum 0.5 bar
Operating pressure of pressure relief valve 2.5 bar
Expansion vessel size (pre-charged at 1 bar) 12 litres (all models)
Maximum heating system volume (including boiler)* 128 litres **
Cold water mains connection 15 mm copper pipe
Pressure relief valve discharge connection 15 mm copper pipe
* Based on vessel charge and system cold ll pressure of 0.5 bar
** Approximately
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