Laars MAGNATHERM MGH2000 Installation And Operation Instructions For

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Laars MAGNATHERM MGH2000 Installation And Operation Instructions For Manual pdf 20 page image

LAARS Heating SystemsPage 16WarnInGDo not use open flame to check for leaks. Anopen flame could lead to explosion, whichcould result in property damage, serious injuryor death.note - The MagnaTherm appliance and allother gas appliances sharing the gas supply linemust be firing at maximum capacity to properlymeasure the inlet supply pressure. The pressurecan be measured at the supply pressure porton the gas valve. Low gas pressure could be anindication of an undersized gas meter, undersizedgas supply lines and/or an obstructed gas supplyline. MagnaTherm units may be equipped withlow and high gas pressure switches that areintegrally vent limited. These types of devices donot require venting to atmosphere.Section 4GaS SUPPly anD PIPInG4.0 Gas Supply and PipingGas piping should be supported by suitable hangersor floor stands, not the appliance. Installers shouldrefer to local building and safety codes or, in theabsence of such requirements, follow the nationalFuel Gas code, AnSi Z223.1 nFPA and/or cSAB149.1 installation codes.Review the following instructions before proceedingwith the installation.1. Verify that the appliance is fitted for theproper type of gas by checking the ratingplate. MagnaTherm appliances are normallyequipped to operate at elevations up to 2000feet (610m).However, the appliance will function properlywithout the use of high altitude modification atelevations up to 10,000 feet (3050 m).2. The maximum inlet gas pressure must notexceed 13” w.c. (3.2kPa). The minimum inletgas pressure is 4” w.c. (1.0kPa).3. Table 8 and Table 9 offer some gas pipe sizinginformation. Refer to the applicable gas codefor more detailed sizing information.4. Run gas supply line in accordance with allapplicable codes.5. Locate and install manual shutoff valves inaccordance with state and local requirements.6. A sediment trap must be provided upstream ofthe gas controls.7. All threaded joints should be coated withpiping compound resistant to action ofliquefied petroleum gas.8. The appliance and its individual shutoff valvemust be disconnected from the gas supplypiping during any pressure testing of thatsystem at test pressures in excess of 1/2 PSiG(3.45kpa).9. The unit must be isolated from the gas supplysystem by closing its individual manual shutoffvalve during any pressure testing of the gassupply piping system at test pressures equal toor less than 1/2 PSiG (3.45kpa).10. The appliance and its gas connection must beleak tested before placing it in operation.11. Purge all air from gas lineset les fenêtres, les vientilateurs, les registre decheminées et les appareils au gaz àleur positionoriginale.7, Tout mauvais fonctionnement du systèmed’évacuation commun devrait être corrigé defacon que l’installation soit conforme au nationalFuel Gas code, AnSi Z223.1/nFPA 54 et (ou)aux codes d’installation cAn/cSA-B149.1. Si lagrosseur d’une section du système d’évacuationdoit être modifié pour respecter les valeursminimales des tableaux pertinents de l’appendiceF du national Fuel Gas code, AnSi Z223.1/nFPA 54 et (ou) aux codes d’installation cAn/cSA-B149.1.3.5 outdoor Installationif installing outdoors in a location that may experiencefreezing temperatures, precautions must be taken toprevent water in the heat exchanger and condensateinside and outside of the boiler from freezing. Damagedue to freezing water or condensate is not covered by thewarranty.For proper operation in outdoor installations,the boiler must be equipped with the inlet air andexhaust terminal kits listed in Table 7. Additionalinstructions are supplied with the terminal kits.table 7. air & Vent accessories for Units Placed outdoors(Place in section 3.5)Model 2000 Model 3000 Model 4000Air intake screen for unit placed outdoors CA011901 CA011902 CA0011903Vent terminal for unit placed outdoors CA011801 CA011802 CA011803Table 3** - Air & Vent Accessories for Units Placed Outdoors