Ideal Boilers Optia HE 9 Installation And Servicing Instructions

Optia HE - Installation & Servicing 31INSTALLATION47 COMMISSIONING AND TESTINGA. ELECTRICAL INSTALLATION1. Checks to ensure electrical safety should be carriedout by a competent person.2. ALWAYS carry out preliminary electrical systemchecks, i.e. earth continuity, polarity, resistance toearth and short circuit using a suitable test meter.WARNING. Whilst effecting the required gas soundness test and purging air from the gasinstallation open all windows and doors, extinguish naked lights and DO NOT SMOKE.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.In IE refer to I.S.813:2002.2. Purging air from the gas installation may be expedited byloosening the union on the gas service cock on the boiler andpurging 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 (H) is OFF.3. Fitting the Boiler Casing (See diagram A, Frame 49)Hook the top edge of the boiler front casing into the channelon the top of the boiler assembly. Swing the bottom of thecasing 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.To gain access to the gas valve:a. Remove the controls support casing. Release thecontrols support front fixing screws 3 turns only. Removethe pod by pulling it forward to disengage from thekeyhole slots.b. Remove the control box securing screws and swing itdown into the servicing position. (See diagram B, Frame 49) .4. Slacken the screw in the burner pressure test point (F) andconnect a gas pressure gauge via a flexible tube.5. Swing the control box back into its working position.6. Press the overheat thermostat reset button (J).7. Switch the electricity supply ON and check that all externalcontrols are calling for heat.48 INITIAL LIGHTING8. Set the boiler thermostat knob (D) to position 6 and theboiler Mains On/Off switch (H) to ON. The fan will start.After the fan has run for a few seconds the pilot solenoidvalve should 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.9. Test for gas soundness around ALL boiler gascomponents using leak detection fluid.10. Operate the boiler for 10 minutes to stabilise the burnertemperature.11. The boiler is pre-set at the factory to its nominal rating. Ifthe burner pressure measured is incorrect it may be resetusing the following procedure. Refer to Table 2 (page 4):a. Set the mains On/Off switch (H) 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).e. Turn the adjusting screw clockwise to INCREASE thepressure, or anticlockwise to DECREASE thepressure.f. Swing the control box back into its working position.g. Switch the electricity supply ON.h. Set the mains On/Off switch (H) to ON and check thenew setting pressure.12. If necessary repeat steps 11a to h until the requiredpressure is achieved. Record this value in the BenchmarkCommissioning Checklist.13. Set the main On/Off switch (H) to OFF.14. Switch the electricity supply OFF.15. Swing the control box down into the servicing position.16. Refit the main burner pressure adjuster cover.17. Remove the pressure gauge and tube. Retighten thesealing screw in the pressure test point. Ensure a gastight seal is made.18. After the gas pressure checks and any adjustmentoperations, the adjustment screw cover must be sealedwith a suitable paint to highlight unauthorised adjustment.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.The Benchmark Log Section of this book or equivalent self certification should be completed and signed to demonstratecompliance with Building Regulations.continued . . . . . . . . .INSTALLATION