Installation Manual - Unical Lattner Condensing Hot Water Boilers

Instructions for the installer3.21 - ELECTRICAL CONNECTIONSRegulations in forceThe electrical connections to the boiler must be made in accordancewith all applicablelocal codes and the latest revision of the NFPA 70: NationalElectrical CodeInstallations should also conform with C22.1 - Canadianelectrical code, part I (21st edition), safety standard for electricalinstallations if installed in Canada.CAUTIONThe boiler must be electrically grounded in accordancewith local codes, or in absence of localcodes, with the National Electrical Code,NFPA 70: National Electrical Code C22.1- Canadianelectrical code, part I (21st edition), safetystandard for electrical installationsThe gas, D.H.W. and the CH system pipes cannotbe used as ground plates.Ensure that the above safety electrical requirements subsist;in case of doubt, ask for a professionally qualified technicianto check the appliance’s electrical system.LATTNER refuses responsibility for any damages arising fromfailure to earth the boiler correctly.It is necessary that a qualified technician verifies that theelectrical system is adequate to the appliance’s maximumabsorbed power, indicated on the data plate, verifying inparticular that the section of the system’s cables is suitableto the appliance’s maximum absorbed power.CAUTIONFor the appliance’s general electrical supply theuse of adaptors, multiple sockets and/orextension cords is strictly forbidden.The use of any power supplied equipmentimplies the observance of several fundamentalrules, such as:- Do not touch the appliance with any wet part of your bodyand/or barefooted;- Do not pull the supply cables- Do not expose the boiler to sunlight, rain, etc., unless it isexplicitly foreseen;- Do not permit children or inexpert people to use theappliance.CAUTIONExternal connection board connectionsWARNINGDanger of fatal accident due to electric shock.120 VAC connections may be present on theexternal connection board when power is suppliedto the boiler.- No changes may be made to the wiring of theboiler.- All connections should be designed in accordance with the applicable regulations.- Label all wires prior to disconnection whenservicing controls. Wiring errors can cause improper and dangerous operation.Mains electrical supply connection120 V - 60 HzPower supply cordThe boiler is provided complete with a power supply cord59‘‘ (1,5 m) long and with a cross section area of 3 x 16 AWGThe electric connections of the boiler are shown in the sectionnamed “ACTUAL WIRING DIAGRAM” (paragraph 3.22)WARNING!We remind you that upstream of the electricalconnection, it will be necessary to foresee aservice relay (NOT SUPPLIED) which, whenthe additional electrical safety devices (ifany) intervene, shuts down the electricalsupply to the on-off fuel valve fitted on thegas supply circuit, but not to the boiler so asto guarantee the running of the pump andpermit the boiler to cool down.DANGER!The electrical connections must be carriedout only by a qualified engineer.Before carrying out the connections or anyother operation on the electrical parts,always switch off and disconnect theelectricity supply and ensure yourself that itcannot be accidentally turned on.It is necessary to fit a double pole switch onthe electrical supply line, having a contactseparation in both poles, in an easy accessibleposition in order to make quick and safe theservicing operations.FASTON BLOCKINGIf necessary the faston can be disconnected byslightly folding up, with a point, the blockingtongue ‘’ Á. ‘’.A30- Verify proper operation after operation servicing.