Ideal Boilers LOGIC MAX COMBI C 24 User Manual

Also see for LOGIC COMBI C30: Installation & servicing User guide

5OPERATION MODESWinter Conditions - (Central Heating and Domestic Hot Waterrequired)Set the mode knob (C) ‘ ’ (winter).The boiler will fire and supply heat to the radiators.The domestic hot water preheat will operate with the preheatbutton set to ‘Preheat On’.Summer Conditions - (Domestic Hot Water only required)Set the mode knob (C) to ‘ ’ (summer).ORSet the central heating demand on the external controls to OFF.The domestic hot water preheat will operate with the preheatbutton set to ‘Hot Water On’.Boiler OffSet the mode knob (C) to ‘BOILER OFF’. The boiler mains powersupply must be left on to enable frost protection (see Frost Protection).PREHEAT - DOMESTIC HOT WATERThe domestic hot water heat exchanger within the boiler can bekept preheated to provide faster delivery of hot water at the tap.This is achieved by pressing the preheat button to “Preheat On”.The boiler will operate periodically for a few seconds tomaintain the domestic hot water heat exchanger in a preheatedcondition. The average time period between operation is 90minutes. This may vary considerably due to the surroundingambient temperature of the boiler. The boiler will operatewhenever there is a demand for domestic hot water.If standard hot water delivery is satisfactory set the preheat to‘Preheat Off’.CONTROL OF WATER TEMPERATUREDomestic Hot WaterThe domestic hot water temperature is limited by the boilercontrols to a maximum temperature of 65 º C, adjustable viathe domestic hot water temperature knob (B). At low DHWdraw off rates the maximum temperature may exceed 65ºC.Approximate temperatures for domestic hot water:Knob Setting Hot Water Temperature (approx.)Minimum 40ºCMaximum 65ºCDue to system variations and seasonal temperaturefluctuations domestic hot water flow rates/temperature risewill vary, requiring adjustment at the tap : the lower the flowrate the higher the temperature, and vice versa.Central HeatingThe boiler controls the central heating radiator temperatureto a maximum of 80 o C, adjustable via the central heatingtemperature knob (B).Approximate temperatures for central heating:Knob Setting Central Heating Radiator Temperature (approx.)Minimum 30ºCMaximum 80ºCFor economy setting ‘ ’ refer to Efficient Heating SystemOperation.