Installation Manual - Unical Lattner Condensing Hot Water Boilers

Instructions for the installer34.1’’(865.5 mm)33.7’’(856 mm)1.8’’(4.5 mm)12.3’’(311,5 mm)10.4’’(265 mm)4.1’’(103 mm)2.2’’(56.5 mm)0,5’’(12 mm)0,5’’(12 mm)0,5’’(12 mm)MRRGG• Mark the 3 holes with the wall bracket, using a spirit level.• Install the wall bracket with the 3 screws• With 2 people, lift the boiler by holding it by its back and bythe transport rail and install it on the wall bracket• The boiler can be moved sideways to get the correct position.3.6 - CONNECTIONSA) Thread Adapter Kit NPT/gasM = CH system flow 1’’¼R = CH system return 1’’¼G = Gas Ball Valve ¾”RGS= Gas Adaptor ¾‘‘= Condensate DrainAR M G S3.3’’ 4.3’’ 4.3’’(85 mm) (110 mm) (110 mm)5.2’’(132 mm)7.0’’(177 mm)S3.7 - INSTALLATION ON EXISTINGHEATING SYSTEMS- The circulation pump’s output, the head and flow directionare suitable.- The gas feeding supply pipe and the eventual tank areconstructed according to the regulations in force.- The expansion vessels assure the total absorption of thedilatation of the fluid contained in the system.- The system has been cleaned of impurities and lime scale.Boiler system flushing(Not Boiler heat exchanger)When replacing an existing boiler the heatingsystem should be flushed with the old boiler inplace before the new boiler is added to the system.If the old boiler has already been removed a bypassmust be piped in when the new boiler is installed in orderto facilitate the flushing of the system.The boiler must be valved off from the system, while thesystem is flushed.No system cleaner should ever enter the boiler heatexchanger because of its caustic nature it could damagethe heat exchanger.When the appliance is installed on existing systems, ensureyourself that:- The flue outlet pipe is suitable for condensing boilers, forthe temperature of the products of combustion, calculatedand manufactured according to the regulations in force. Itmust be installed as much as possible in a straight line,17