Laars NeoTherm NTH Installation And Operation Instructions Manual

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Laars NeoTherm NTH Installation And Operation Instructions Manual Manual pdf 13 page image

NeoTherm Boilers and Water Heaters Page 13INSTALLATION STANDARDSMATERIAL UNITED STATES CANADAStainless Steel UL 1738 Venting must be ULC-S636 certified for use asPVC, sch 40 ANSI/ASTM D178 venting material. The venting material must be chosenCPVC, sch 40 ANSI/ASTM F441 based upon the intended application of the boiler.Table 5. Required Exhaust Vent Material.Use ABS, PVC, CPVC or galvanized pipe for thecombustion air intake (see Table 4), sized per Table 2.Route the intake to the boiler as directly as possible. Sealall joints. Provide adequate hangers. The unit must notsupport the weight of the combustion air intake pipe.Maximum linear pipe length allowed is shown in Table 2.Subtract 5 allowable linear ft. (1.5m) for every elbow used.The connection for the intake air pipe is at the top ofthe unit (see Figure 9a or Figure 9b).In addition to air needed for combustion, air shallalso be supplied for ventilation, including air required forcomfort and proper working conditions for personnel.3.2 VentingWARNINGFailure to use CPVC or stainless steel venting for thefirst 20" (285-600) / 30" (80-210) of vent material or forany part of the venting that is installed inside a closetmay lead to property damage, personal injury or death.The proper length of this material is supplied with boiler.Boilers in U.S. may use pipe included with boiler.WARNINGFailure to use the appropriate vent material, installationtechniques, glues/sealants could lead to vent failurecausing property damage, personal injury or death.WARNINGAll venting must be installed according to this manualand any other applicable local codes, including but notlimited to, ANSI Z223.1/NFPA 54, CSA B149.1,CSAB149.2 and ULC-S636. Failure to follow thismanual and applicable codes may lead to propertydamage, severe injury, or death.The flue temperature of the NeoTherm changesdramatically with changes in operating watertemperature. Therefore, it is necessary to assess theapplication of the boiler to determine the requiredcertified vent class. If the NeoTherm is installed inan application where the ambient temperature iselevated, and/or installed in a closet/alcove, CPVC orstainless steel material is required. If the systemtemperatures are unknown at the time ofinstallation, class IIB or higher venting material isrecommended.The NeoTherm is a Category IV appliance andmay be installed with PVC and CPVC that complieswith ANSI/ASTM D1785 F441, or a stainless steelventing system that complies with UL 1738 Standard(see Table 5).The unit’s vent can terminate through the roof, orthrough an outside wall.When using PVC/CPVC for vent material, ventingmust be connected to the CPVC section included withNeoTherm sizes 80-600. The CPVC vent sectionincluded with the NeoTherm may be broken by CPVCfittings if necessary, but never reduced in total length.See Table 2 to select the appropriate vent pipe diameter.Vent pipe must pitch upward, toward the vent terminal,not less than 1/4" per foot, so that condensate will runback to the NeoTherm to drain. Route vent pipe to theheater as directly as possible. Seal all joints and provideadequate hangers as required in the venting systemmanufacturer’s Installation Instructions. Horizontalportions of the venting system must be supported toprevent sagging and may not have any low sections thatcould trap condensate. The unit must not support theweight of the vent pipe. Please see Table 2 for properdiameter vs. length allowed.IMPORTANT NOTE ABOUT COMMON VENTING: Asingle vent that is shared by multiple NeoTherm unitsMUST be engineered by a competent ventingspecialist, and involves the selection of draft inducingequipment, hardware and controls to properly balanceflue gas pressures. Do not common vent NeoThermFigure 10. Combustion Air and Vent Through Roof.