2 Technical Data
6
2.1 Boiler Technical Data
Table 2-1: Technical Data
Combi 21e Combi 26e Combi 36e
Boiler water content
(including 32 litre primary store)
litres 48.0 48.5 53.5
gall 10.6 10.7 11.8
Weight (dry)*
kg 147 188 218
lbs 325 415 481
Maximum heat output (Kerosene)
kW 21.0 26.0 36.0
Btu/h 71,650 88,700 123,000
Flow connection mm 22 22 28
Return connection mm 22 22 28
Cold water mains inlet mm 15 15 22
Domestic hot water outlet mm 15 15 22
Pressure relief valve discharge mm 15
Maximum heating system pressure (cold) bar 1.0
Minimum heating system pressure (cold) bar 0.5
Expansion vessel (pre-charged at 1 bar) litres 24
Maximum heating system volume** litres 255
Minimum domestic hot water flow rate 3.0 litres/min (0.66 gal/min)
Maximum domestic hot water temperature °C 65 (factory set)
Maximum mains water inlet pressure bar 8.0
Minimum recommended mains water inlet pressure bar 2.5
Condensate connection mm 22mm plastic pipe
Flue diameter (conventional)*** 100mm (4in) diameter
Waterside resistance (∆T=10°C) mbar 28.5 26.0
Waterside resistance (∆T=20°C) mbar 10.0 9.5
Maximum static head m 28
Minimum circulating head m 1
Boiler thermostat range °C 65 to 78
Limit (safety) shut off temperature °C 111±3
Maximum hearth temperature °C Less than 50
Electricity supply 230/240V 1ph 50Hz fused at 5A
Burner motor power W 212
Absorbed motor power W 0.15
Starting current A 4.2 2.60
Running current A 0.85
Oil connection ¼ BSP male (on end of flexible hose)
Conventional flue draught
N/m² Minimum: 8.7 - Ma ximum: 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 2.5
* Weight includes burner (and expansion vessel) but excludes flue.
** Based on expansion vessel charge and initial cold system pressure of 0.5 bar.
*** If used as alternative to low-level terminal supplied with boiler (refer to Section 9).
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