Installation Manual - Unical Lattner Condensing Hot Water Boilers

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Instructions for the installer3.9 - FLOW AND RETURN PIPE CONNECTIONSNOTICEWhen using plastic pipes, observe the supplier’sinstructions especially those referring to recommendedjointing techniques and the notes relatingto the heating system water.NOTICETo prevent contamination in the heating systemwe recommend you integrate a dirt filter in thereturn pipe, near the boiler. In an old system it isa requirement to install a dirt filter. Also installshutoff valves to enable filter cleaning immediatelyupstream and down stream of the dirt filter(scale cartridge or y-strainer).When determining the size of the CH circuit pipes it isessential to bear in mind the pressure losses induced by anyof the system’s components and by the configuration of thesame system.WARNING!Ensure yourself that the system’s piping is notused as the earth clamps for the electrical ortelephonic system. They are absolutelyunsuitable for this use. In a short time this couldcause serious damage to the piping, boilerand radiators.NOTICEThe pipe to be connected to the boiler must becleaned before connecting in order to preventdirt from entering and damaging the boiler.WARNING!IT IS ABSOLUTELY FORBIDDEN TO FIT ON-OFFVALVES ON THE GENERATOR TO THE FOREOF THE SAFTEY DEVICESThe route of the piping has to be conceived taking all thenecessary precautions in order to avoid air locks and tofacilitate the continuous purging of the system.- Connect CH flow pipe to the Supply connection makingsure it is not under stress. Use a supply pipe with a minimumdiameter of 3’’ (80 mm)- Connect the return pipe with a fiat rubber seal installed tothe Return connection making sure it is not under stress.Use a return pipe with a minimum diameter of 3’’ (80 mm).WARNING!Before installing the boiler we recommendthat the system is flushed out with a suitableproduct, in order to eliminate any metallictooling or welding residues, oil and grimewhich could reach the boiler and affect theproper running of the boiler.20
Instructions for the installer3.10 - DETERMINATION OF PRIMARY BOILER PUMP OR BOILER SYSTEM PUMPThe boiler pump must have a delivery head which can ensurethe water flow rate as shown in the diagram “<strong>Water</strong> pressurelosses”.The following table gives an indication of the pump’s flow ratein function of the Δt of the primary circuit if the installation hasa mixing headerSize of the pumpsIf determined by the installeror technical engineers mustbe sized according to thedata of boiler and system.Power supply in btu (kW)Max flow ratedemanded in gal/h (l/h) ΔT 27°F (15°C)Max flow ratedemanded in gal/h (l/h) ΔT 36°F (20°C)ALKON 90298,600(87,51)13261097In case of fixed raet pump isrecommended to choose acirculator with flow rate andhead at about 2/3 of thecharacteristic curve.The Δt between supply andreturn boiler should never beless than 27 °F (15 K).PRESSURE AVAIBLE TO THE SYSTEMPressure losses in wcQ: water flow rate gal/hNOTE: The use of a mixing header fitted between the boiler circuit and the system circuit is always advisable.It becomes INDISPENSABLE if the system requires flow rates superior to the maximum permitted boiler flowrates, which is to say lower than 27 °F (15 K).21
Page 1 and 2: ®LATTNERCondensing gas boilerALKON
Page 3 and 4: General Information1 GENERAL INFORM
Page 5 and 6: General InformationDANGERSmell of g
Page 7 and 8: General Information1.8 - TOOLS, MAT
Page 9 and 10: 2.2 - DIMENSIONSTechnical features
Page 11 and 12: 2.4 - BOILER WATER CIRCUIT DIAGRAMT
Page 13 and 14: 3INSTRUCTIONS FORTHE INSTALLERInstr
Page 15 and 16: Instructions for the installer- Rem
Page 17 and 18: Instructions for the installer• D
Page 19: Instructions for the installer3.8 -
Page 23 and 24: 3.14 - CONDENSATE DRAINDuring the c
Page 25 and 26: Instructions for the installer3.16
Page 27 and 28: Instructions for the installerThe f
Page 29 and 30: 3.19 - ELECTRICAL CONNECTIONSRegula
Page 33 and 34: 3.22 - STARTING UP: Filling and de-
Page 39 and 40: 3.27 - PROGRAMMING OF THE OPERATING
Page 41 and 42: 4 INSPECTION AND SERVICING SCHEDULE
Page 43 and 44: Instructions for the installer4.5 -
Page 45 and 46: 5 FAULT FINDINGFault finding5.1 - E
Page 47 and 48: Spare parts6 SPARE PARTS15252224342
Page 49: Spare parts49

Installation Manual - Unical Lattner Condensing Hot Water Boilers

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