2 Technical Data
6
2.1 Boiler Technical Data
Vortex Pro Combi Vortex Pro Combi Vortex Pro Combi
Model 21e 26e 36e
Boiler water content Litres 48.0 48.5 53.5
(including 32 litre primary store) Gal 10.6 10.7 11.8
Weight (dry)* kg 147 188 218
lbs 325 415 481
Connections: Heating flow and return 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
Condensate connection 22mm plastic pipe
Flue size (conventional)*** 100mm (4 in) diameter
Waterside resistance Flow/Return temp.
diff. of 10°C mbar 28.5 26.0
Waterside resistance Flow/Return temp.
diff. of 20°C mbar 10.0 9.5
Boiler thermostat range °C 65 to 78
Limit (safety) thermostat switch off temp. °C 111°C +0 -3
Maximum heating system pressure (cold) bar 1.0
Minimum heating system pressure (cold) bar 0.5
Pressure relief valve bar 2.5
Expansion vessel (pre-charged at 1 bar) litres 10 12 14
Maximum heating system volume** litres 106 128 148
Maximum operating pressure bar 2.5
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
Maximum hearth temperature °C Less than 50
Electricity supply 230V / 240V ~ 50Hz Fused at 5 Amp
Motor power 90 W max.
Starting current Amp 4.2 2.6
Running current Amp 0.85
Oil connection
1
/4” Male BSP (on end of flexible fuel line)
Conventional flue*** Minimum flue draught - 8.7 N/m² (0.035 in wg)
Maximum flue draught - 37 N/m² (0.15 in wg)
* Weight includes burner 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 (see section 9)
Technical Data
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