29INSTALLATIONisar - Installation and Servicing40 HANDING OVER7. If any programmer is fitted draw attention to the ProgrammerUsers Instructions and hand them to the householder.8. Loss of system water pressureExplain that the dial underneath the boiler indicates thecentral heating system pressure and that if the normal COLDpressure of the system is seen to decrease over a period oftime then a water leak is indicated. In this event a CORGIregistered installer should be consulted. In IE consult aCompetent Person.WARNING.Do not fire the boiler if the pressure has reduced to zero fromthe original setting.9. After installation, commissioning and customer hand-overplease complete the appliance log book andleave this with the customer. For IE, it is necessary tocomplete a “Declaration of Conformity” to indicatecompliance to I.S.813:2002.10. Stress the importance of regular servicing by a CORGIregistered installer and that a comprehensive service shouldbe carried out AT LEAST ONCE A YEAR. In IE servicing workmust be carried out by a Competent Person.11. As the installer you may wish to undertake the servicecontract yourself or alternatively offer to the customer thebenefits of the Ideal Care Scheme, details of which areoutlined in the householder pack supplied with this boiler.1. Hand the User Instructions to the householder andexplain his/her responsibilities under the relevantnational regulations.2. Explain and demonstrate the lighting and shuttingdown procedures.3. The operation of the boiler and the use and adjustmentof all system controls should be fully explained to thehouseholder, to ensure the greatest possible fueleconomy consistent with the household requirements ofboth heating and hot water consumption.Advise the User of the precautions necessary to preventdamage to the system and to the building, in the eventof the system remaining inoperative during frostyconditions.4. Explain the function and the use of the boiler heatingand domestic hot water controls.5. Explain the function of the boiler fault mode.Emphasise that if a fault is indicated, the boiler shouldbe turned off and a CORGI registered installerconsulted. In IE contact a Competent Person.6. Explain and demonstrate the function of time andtemperature controls, radiator valves etc., for theeconomic use of the system.WATER TEMPERATURESTemperatures can be selected via the CH and DHWthermostats.39 GENERAL CHECKS - continuedCH & DHW CONT.5. Set the central heating external controls to OFF. Theburner should go off and the pump continue to run fora few seconds.The display should read:returning towhen the pump stops.6. Check the correct operation of the programmer (iffitted) and all other system controls. Operate eachcontrol separately and check that the main burnerresponds.WATER CIRCULATION SYSTEM1. With the system COLD, check that the initial pressure iscorrect to the system design requirements.For pre-pressurised systems, this should be 1.0 bar.2. With the system HOT, examine all water connections forsoundness. The system pressure will increase withtemperature rise but should not exceed 2.5 bar.3. With the system still hot, turn off the gas, water andelectricity supplies to the boiler and drain down tocomplete the flushing process.Note.A flushing solution should be used during the flushingprocedure. Flushing solutions: Fernox Superfloc,Sentinel X300 (new systems) or X400 (existingsystems). Refer to Frame 6.4. Refill and vent the system, add inhibitor (see Frame 6),clear all air locks and again check for water soundness.Affix the water treatment warning label, supplied in thehardware pack, in aprominent position on the system, toprevent the use of incorrect water treatment additives.5. Reset the system initial pressure to the designrequirement.6. Balance the system. Refer to Frame 5.7. Check the condensate drain for leaks and check that it isdischarging correctly.8. Finally, set the controls to the User's requirements.Note.The pump will operate briefly as a self-check onceevery 24 hours in the absence of any system demand.Knob Setting CH Flow DHW OutletTemp Tempo C ( o F) o C ( o F)Max 82 (180) 65 (150)Min 30 (86) 42 (110)After completing the installation and commissioning of the system theinstaller should hand over to the householder by the following actions:INSTALLATION