802149UK Celsius residential - Installation instructions -Jan 2016 v2.03 Page 15 of 28Filter / softener installationAn external filter / softener may be fitted to reduce the incidence of scale build up in the hot tank or may besupplied at the customer’s request. (Scale filter head fitting kit order code ZT200G4).• Choose a suitable location, (cupboard back or side wall)within the reach of the braided hoses.• Mount the filter head bracket in an upright position, usingthe screws supplied in the kit.• Ensure there is enough headroom for the filter cartridgeto be easily fitted and removed. *Allow a min. 80mmbase clearance.• Attach the hoses as adjacent diagram, noting the flowdirections as marked on the filter head.3.1 Mounting the filter head3.2 Cartridge installation and flush• Remove the sanitary cap from the new cartridge and make surethe o-rings are correctly positioned.• Moisten o-rings with water. Do not use any petroleum productsto lubricate the o-rings.• Install cartridge with a quarter turn anticlockwise until cartridgecomes to a complete stop.• Cartridge installation is complete.Note The following instructions to flush the filter must beundertaken AFTER commissioning of the complete HydroTap®G4system, see section 6, Commissioning, page 22.• Disconnect the braided hose from the filter outlet on the filterhead (out arrow) & insert the filter flush pipe (JG plastic hose).Direct the pipe into a container of greater than 10 litre capacity.• Turn the mains water supply on.• Use the HydroTap®G4 to dispense boiling water. After a shorttime water will flush through the filter into the container.• Allow 10 litres of water to flush through.• Turn the mains water supply off.• Remove the filter flush pipe (JG plastic hose) from the filteroutlet, and refit the braided hose from the Command-CentreTM..• Turn the mains water supply on.• If a booster is fitted, turn the power to the booster off anduse the HydroTap®G4 boiling lever to dispense water for 30seconds, allow the tank to refill.• Turn the power to the booster on and dispense boiling water fora further 30 seconds.• The filter / softener flush is complete.*Min. 80mmClearance to cabinetfloor.Filter LabelInletOutlet