Page 505.4.5 I-Series (Internal) Combination & Combination Professional BoilersMODEL I21C / I21C PRO I26C / I26C PRO I33C / I33C PRONominalHeat OutputkWBtu/hr14.750,00017.660,00021.071,65021.071,56023.580,00027.192,38027.192,38029.099,05032.7111,600NominalHeat InputkWBtu/hr15.352,15018.462,60022.075,00022.075,00024.483,17528.095,55028.095,55030.0102,40034.0116,000Burner RDB 2.2 BX 15-21 RDB 2.2 BX 21-27 RDB 2.2 BX 27-33Head BX500 BX700 BX700Secondary Air Damper B N/A N/AConventionalFlue Diametermmin100 or 1254 or 5100 or 1254 or 5100 or 1254 or 5Flue Gas Temp. 0C 86 88 90 90 93 95 95 98 110Smoke Bacarach 0 0 0Kerosene SettingsNozzle make Danfoss 80°EH Danfoss 80°ES Danfoss 80°ESsize 0.45 0.55 0.60 0.55 0.65 0.75 0.75 0.85 0.85Oil PumpPressurebarpsi6.8998.01168.011610.01458.712645.01029.01318.011610.0145% CO2RecommendedMaximum11.512.511.512.511.512.511.512.511.512.511.512.511.512.511.512.511.512.5Approx FuelFlow Ratelitres/hGals/h1.650.361.980.442.350.522.350.522.650.582.980.652.980.653.400.753.810.84Combustion HeadPosition mm 11.0 11.5 12.5 12.5 14.5 15.0 15.5 18.0 18.0WaterContentlitresgals6414.16414.16414.1Boiler Weight Wet kg 221 221 221Domestic Hot Water (DHW) ProductionMinimum Inlet DynamicPressure for MaximumDHW Flow Ratebarpsi1.8261.8261.826Maximum Achievable DHW Flow Rate Unrestricted Unrestricted UnrestrictedMaximum RecommendedDHW Flow Ratelitres/mgal/m184.0184.0184.0Factory SetDHW Flow Ratelitres/mgal/m184.0184.0184.0MinimumDHW Flow Ratelitres/mgal/m2.50.552.50.552.50.55DHW Temperature Rise(at Maximum Output)32°C @ 18 litres/minfor 120 litre draw-off32°C @ 22 litres/minfor 120 litre draw-off32°C @ 24 litres/minfor 120 litre draw-offPressure Relief barpsi2.50.552.50.552.50.55Cold Water Mains Inlet Connection Minimum 15mm Minimum 15mm Minimum 15mmDHW Outlet Connection 22mm Copper 22mm Copper 22mm CopperFlow Connection 22mm Copper 22mm Copper 22mm Copper / 28mmCompressionReturn Connection 22mm Copper 22mm Copper 22mm Copper / 28mmCompressionFactory Settings Highlighted in bold
