Laars MASCOT LX Installation And Operation Instructions Manual

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LAARS Heating SystemsPage 103.2 Venting (Exhaust)The flue temperature of the Mascot LX changesdramatically with changes in operating watertemperature. Therefore, it is necessary to assess theapplication of the boiler to determine the requiredcertified vent class. If the Mascot LX is installed inan application where the ambient temperature iselevated, and/or installed in a closet/alcove, CPVC,polypropylene, or stainless steel material is required.If the system temperatures are unknown at the timeof installation, stainless, polypropylene or CPVCmaterial is recommended.The Mascot LX is a Category IV appliance and maybe installed with PVC, CPVC or polypropylene thatcomplies with ULC-S636, ANSI/ASTM D1785 F441(see Table 4) or a stainless steel venting system thatcomplies with UL 1738 Standard (see Table 8).WARNINGFailure to use the appropriate vent material, installationtechniques, glues/sealants could lead to vent failurecausing property damage, personal injury or death.have a minimum free area of 1 square inch per 3000Btu/hr (734 square mm/kW) of the total input rating ofall equipment located in the enclosure. This openingmust not be less than the sum of the areas of all ventconnectors in the confined space.Other methods of introducing combustion andventilation air are acceptable, providing they conform tothe requirements in the applicable codes listed above.In Canada, consult local building and safety codes or, inabsence of such requirements, follow CAN/CGA B149.3.1.2 Ducted Combustion AirThe combustion air can be taken through the wall, orthrough the roof. When taken from the wall, it mustbe taken from out-of-doors by means of the LAARShorizontal wall terminal, shown in Table 5. See Table 4to select the appropriate diameter air pipe. When takenfrom the roof, a field-supplied rain cap or an elbowarrangement must be used to prevent entry of rain water(see Figure 5).Use ABS, PVC, CPVC, polypropylene, or galvanizedpipe for the combustion air intake (see Table 6), sizedper Table 4. Route the intake to the boiler as directlyas possible. Seal all joints. Provide adequate hangers.The unit must not support the weight of the combustionair intake pipe. Maximum linear pipe length allowed isshown in Table 4. Subtract 5 allowable linear ft. (1.5m)for every elbow used.The connection for the intake air pipe is at the top of theunit (see Figure 3).In addition to air needed for combustion, air shall alsobe supplied for ventilation, including air required forcomfort and proper working conditions for personnel.Table 5. Vent Termination OptionsPart Number Size Description239-44069-02 2" PVC Concentric Vent Terminal239-44069-01 3" PVC Concentric Vent TerminalCA010101 2" Flush Vent Terminal PVCCA010100 3" Flush Vent Terminal PVCCA007100 3" to 5" Stainless Steel Concentric Vent TerminalINSTALLATION STANDARDSMATERIAL UNITED STATES CANADAABS ANSI/ASTM D1527PVC, sch 40 ANSI/ASTM D1785 or D2665 Air pipe material must be chosenCPVC, sch 40 ANSI/ASTM F441 CPVC, sch 40, ANSI/ASTM, PolypropylenePolypropylene UL1738, ULC S636. based upon the intended application of the boiler.Single wall galv. steel 26 gaugeTable 6. Required Combustion Air Pipe Material.