Ideal Boilers Classic FF 250 P Installation And Servicing Manual

Classic FF - Propane Installation 25INSTALLATION44 COMMISSIONING AND TESTING(a) Electrical Installation1. Checks to ensure electrical safety should be carried outby a competent person.2. ALWAYS carry out preliminary electrical system checks,i.e. earth continuity, polarity, resistance to earth andshort circuit using a suitable test meter.WARNING. Whilst effecting the required gas soundness test and purging air from the gas installation open all windows anddoors, extinguish naked lights and DO NOT SMOKE.45 INITIAL LIGHTING(b) Gas Installation1. The whole of the gas installation, including the meter, MUSTbe inspected and tested for soundness, and purged inaccordance with the recommendations of BS. 6891.2. Purging air from the gas installation may be expedited byloosening the union on the gas service cock on the boilerand purging until gas is detected.3. Retighten the union and check for gas soundness.TO LIGHT THE BOILER1. Check that all the drain cocks are closed, and any valves inthe flow and return are open.2. Check that the gas service cock (B) is OPEN and the boilermains On/Off switch is OFF.3. If the boiler output is to be set to minimum or mid, affix theappropriate indicator label supplied in the hardware pack tothe data badge, located on the controls support.4. Fitting the Boiler CasingThe boiler casing must be refitted with the controls supportcasing attached for alignment purposes. Lift the boilercasing up to the boiler assembly, with the casing top angledforward. Hook the top edge of the boiler casing into thechannel on the top of the boiler assembly. Swing the bottomof the casing down and secure with the 2 captive screws.The casing must seat correctly and compress the sealingstrip to make an airtight joint.Visually check the side seals but, if side clearances arelimited, then check that the top and bottom edges of thecasing are correctly located.Note. If the Sealed System Unit is fitted remove the unitcasing in order to inspect the top casing seal.To gain access to the gas valve:a. Remove the controls support casing. Release the controlssupport front fixing screws 3 turns only. Remove the podby pulling it forward to disengage from the keyhole slots.b. Remove the control box securing screws and swing itdown into the servicing position. See diag. B Frame 46.5. Slacken the screw in the burner pressure test point (F) andconnect a gas pressure gauge via a flexible tube.6. Swing the control box back into its working position.7. Press the overheat thermostat reset button (J).8. Switch the electricity supply ON and check that all externalcontrols are calling for heat.9. Set the boiler thermostat knob (D) to position 6 and theboiler Mains On/Off switch to ON. The fan will start. Afterthe fan has run for a few seconds the pilot solenoid valveshould open and the intermittent spark commence,continuing until the pilot is established. The main burnerwill then cross-light smoothly. If this sequence does notoccur, refer to the Fault Finding section.10. Test for gas soundness around ALL boiler gas componentsusing leak detection fluid.11. Operate the for 10 minutes to stabilise the burnertemperature.12. The boiler is pre-set at the factory to its highest nominalrating but can be range- rated to suit the system designrequirements. Refer to Table 2 (page 2):a. Set the mains On/Off switch to OFF.b. Switch the electricity supply OFF.c. Swing the control box down into the servicing position.d. Remove the main burner adjuster cover.e. Turn the adjusting screw clockwise to INCREASE thepressure, or anticlockwise to DECREASE the pressure.f. Swing the control box back into its working position.g. Switch the electricity supply ON.h. Set the mains On/Off switch to ON and check the newsetting pressure.13. If necessary repeat steps 12a to h until the requiredpressure is achieved. Record this value in the Benchmarklog book.14. Set the main On/Off switch to OFF.15. Switch the electricity supply OFF.16. Swing the control box down into the servicing position.17. Refit the main burner pressure adjuster cover.18. Remove the pressure gauge and tube. Retighten thesealing screw in the pressure test point. Ensure a gas tightseal is made.LEGENDA Sightglass.B Gas service cock.C Inlet pressure test point.D Thermostat knobE Main burner pressure adjuster.F Burner pressure test point.H Boiler mains on/off switch.J Overheat thermostat resetbutton.INSTALLATION