Laars NeoTherm NTH Installation And Operation Instructions Manual

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Laars NeoTherm NTH Installation And Operation Instructions Manual Manual pdf 12 page image

LAARS Heating SystemsPage 12HORIZONTAL INTAKE AND EXHAUST PVC VENT TERMINAL KITS2" PVC 3" PVC 4" PVC 6" PVCSIZE Standard Concentric Standard Concentric Standard StandardCA006000 CA005900 239-44069-0180 included optional optional optional n/a n/a105 included optional optional optional n/a n/a150 n/a n/a included optional n/a n/a199 /210 n/a n/a included optional n/a n/a285 n/a n/a optional optional included n/a399 n/a n/a n/a n/a included n/a500 n/a n/a n/a n/a included n/a600 n/a n/a n/a n/a included optional750 n/a n/a n/a n/a n/a included850 n/a n/a n/a n/a n/a includedConcentric vent terminal = 10 ft. pipe length.Table 3a. PVC Vent Terminal Kits.Method 1: Two permanent openings, onecommencing within 12" (300mm) of the top and onecommencing within 12" (300mm) of the bottom, of theenclosure shall be provided. The openings shallcommunicate directly, or by ducts, with the outdoors orspaces that freely communicate with the outdoors.When directly communicating with the outdoors, orwhen communicating to the outdoors through verticalducts, each opening shall have a minimum free area of 1square inch per 4000 Btu/hr (550 square mm/kW) oftotal input rating of all equipment in the enclosure.When communicating to the outdoors throughhorizontal ducts, each opening shall have a minimumfree area of not less than 1 square inch per 2000 Btu/hr(1100 square mm/kW) of total input rating of allequipment in the enclosure.Method 2: One permanent opening, commencingwithin 12" (300mm) of the top of the enclosure, shall bepermitted. The opening shall directly communicate withthe outdoors or shall communicate through a vertical orhorizontal duct to the outdoors or spaces that directlycommunicate with the outdoors and shall have aminimum free area of 1 square inch per 3000 Btu/hr(734 square mm/kW) of the total input rating of allequipment located in the enclosure. This opening mustnot 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,in absence 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 must betaken from out-of-doors by means of the LAARShorizontal wall terminal, shown in Table(s) 3. See Table 2to 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 Figure10).SECTION 3.Venting and Combustion Air3.1 Combustion AirNeoTherm boilers and water heaters must haveprovisions for combustion and ventilation air inaccordance with the applicable requirements forCombustion Air Supply and Ventilation in the NationalFuel Gas Code, ANSI Z223 1; or in Canada, the NaturalGas and Propane Installation Code, CSA B149.1. Allapplicable provisions of local building codes must alsobe adhered to.A NeoTherm unit can take combustion air fromthe space in which it is installed, or the combustionair can be ducted directly to the unit. Ventilation airmust be provided in either case.3.1.1 Combustion Air From RoomIn the United States, the most commonrequirements specify that the space shall communicatewith the outdoors in accordance with method 1 or 2,which follow. Where ducts are used, they shall be of thesame cross-sectional area as the free area of theopenings to which they connect.INSTALLATION 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 based upon the intended application of the boiler.Single wall galv. steel 26 gaugeTable 4. Required Combustion Air Pipe Material.PRO TECH (FasNSeal) HEAT FAB (Saf-T-Vent) Z FLEX (Z-Vent)SIZE Boiler Flue Intake Air Boiler Intermediate Flue Intake Air Boiler Flue Intake AirAdapter Termination Termination Adapter Adapter Termination Termination Adapter Termination Termination399-600 F303759 FSBS4 FSAIH04 KB285600 9454BUREZ-1* 9492 9414TERM 2SVSLA04 2SVSTP04 2SVSTEX0490FSRC4(R.C) 303888 5400CI 2SVSRCX04750-850 F303759 FSBS6 FSAIH04(intake only) 303888 Table 3b. Approved Stainless Steel Terminations and Adapters.