Ideal Boilers mini HE C24 Installation And Servicing

INSTALLATIONmini HE --- Installation & Servicing2626 INITIAL LIGHTINGA B C D E FCentral Heating flowDomestic hotwater outlet Gas inletDomestic coldwater inlet Central Heating returnGLegendA Appiance On lampB Domestic hot water temperature controlC Main switch and radiator temperature controlD Boiler reset buttonE Lock ---out signal lampF Programmer (optional)G System pressure and temperature gaugeIMPORTANT Before lighting the boiler you should noteespecially that:1 Check that all the drain cocks are closed and any valvesin the flow and return are open.2 Check that the system has been filled and pressurisedand that the boiler is not air locked.3 Remove boiler front panel.4 Ensure the dust cap on the automatic air vent is open atleast one full turn and leave this permanently open5 Ensure that the pump is free to rotatei Remove the vent plugii Using a screwdriver, rotate the shaft several timesiii Replace the vent plugNote. Some slight water leakage will occur6 Remove the screw in the burner pressure test pointindicated on the following picture and connect a gaspressure gauge via a flexible tube.Be sure to select the correct pressure test point. Refer toTables for pressures.7 Check that the gas service cock is ON.8 Switch the electricity supply ON and check that allexternal controls are calling for heat.9 Set the main switch C to ’ON’. Following a pre---purgeperiod the gas control solenoid valve should open and thespark commence, continuing until the burner isestablished.10 Check that the burner lights smoothly. If this does notoccur within 20 seconds, turn the main switch to ’O’position, wait for 5 seconds then try again by pressing thereset button ’D’. If the burner still does not light, refer tothe ’Fault Finding’ section.11 Test for gas soundness around ALL boiler gascomponents, using leak detection fluid.12 Operate the boiler for 10 minutes to stabilise the burnertemperature.13 Check that the burner pressures are correct. The boiler isfactory pre---set and should not need adjustment.However if adjustment is required refer to frame 27.14 Set the boiler main switch to ’O’.15 Remove the pressure gauge and tube. Replace thesealing screw in the pressure test point. Ensure a gastight seal is made.16 Refit the boiler front panel using the screws previouslyremoved.17 Switch the boiler on again.INSTALLATION