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Фрагмент инструкции
These couplings can be ordered through your local furnace distributor. To install a coupling, slide the rubber coupling over the end of the pipe that is attached to the furnace and secure it with one of the hose clamps. Then slide the other end of the rubber coupling onto the other pipe from the vent and secure the coupling with the second hose clamp. Ensure that the connection is tight and leak free. NORDYNE condensing furnaces have been certified for installation with zero clearance between vent piping and combustible surfaces. However, it is good practice to allow space for convenience in installation and service. Location of Outdoor Terminations Horizontal Venting Vent and combustion air intake terminations must be as shown in Figure 19 and 20. Vent termination clearances shall be consistent with the National Fuel Gas Code, ANSI 2223.1/NFPA 54 and/or the CSA B149.1, Natural Gas and Propane Installation Code. All minimum clearances specified must be maintained to protect building materials from degradation by flue gases. ! 21 Combustion Air Pipe Exhaust Vent Cabinet 5' Support System on Vertical Rise Below Joints Support System with first support as close to furnace as Possible Upward Pitch 1/4" per Foot Furnace Front Straight Neoprene Rubber Couplings with 2 Hose Clamps* Combustion Air Pipe Exhaust Vent Cabinet 5' Support System on Vertical Rise Below Joints Support System with first support as close to furnace as Possible Upward Pitch 1/4" per Foot Furnace Front Straight Neoprene Couplings with 2 Hose Clamps* (Optional - Not Shown) Combustion Air Inlet 2" PVC on 040/060 models, 3" PVC on 080/100 models 2" PVC Exhaust Vent All Models Furnace Top Downfl ow Furnaces Upfl ow Furnaces Upfl ow Furnaces Downfl ow Furnaces Figure 18. Furnace Pipe Adaptions Figure 17. Vertical Venting * These couplings are fi eld-supplied and can be used if the installation requires breakable connections in the piping. Note that a maximum of two couplings per pipe are allowed. Combustion Air Inlet Pipe Collar Diameter 3" for coupling or reducer Furnace Top 2" PVC Exhaust Vent All Models ! WARNING: Ensure that the combustion air vent and the exhaust vent are confi gured as shown in Figure 19 and 20. Improper vent termination can cause recirculation of the flue gases. This may result in furnace vibration. In severe cases, the furnace will cycle due to the intermittent contact between the flame and the flame sensor. If you note oscillations occurring, check the vent configuration. Make sure that the exhaust vent does not have a 90 degree termination. Vent and combustion air intake terminations must be located to ensure proper furnace operation and to conform to applicable codes. Figure 19 and 20 illustrates necessary distances from the vent termination to windows and building air intakes. In Canada, the Canadian Fuel Gas Code takes precedence over these instructions. Specifically, all minimum distance requirements with respect to termination of the vent piping listed below (items 1 through 8). The following list is a summary of vent terminal location requirements: 1. The termination must be 12 inches above snow level or grade level whichever is higher. See Figure 18 for alternate method to achieve 12” above snow level. 2. The minimum distance for a (1-pipe installation) from any door, (openable) window, or gravity air inlet is 4 ft. below, 4 ft. horizontally, or 1 ft. above. 3. The minimum distance for a direct vent (2pipe) installation from any door, (openable) window, or air gravity inlet is 1 ft. below, 1 ft. horizontally, or 1 ft. above. 4. For one-pipe installations the recommended minimum distance from an inside corner formed by two exterior walls is 6 feet, but is not required. 5. The vent termination for a 1-pipe installation shall be a minimum of 3 ft. above any forced air inlet within 10 ft. 6. The vent termination shall be located at least 3 ft. horizontally from any electric meter, gas meter, regulator and any relief equipment in accordance to ANSI 2223.1/NFPA S4. These distances apply ONLY to U.S. installations. In Canada, the Canadian Fuel Gas Code takes precedence. 7. Avoid areas where condensate drainage may cause problems by dropping on planters or patios, etc. Also ensure that exhaust gases will not impinge on windows or building surfaces, which may be compromised or damaged by condensation. Do not install the vent terminal such that exhaust is directed into window wells, stairwells, under decks or into alcoves or similar recessed areas, and do not terminate above any public walkways. 8. Select the point of wall penetration where the minimum 1/4 inch per foot of slope up can be maintained. ! CAUTION: For optimum performance, vent furnace through wall which experiences the least exposure to winter winds. For Canadian installations please refer to the Canadian Installation Code (CAN/CGA-B149.1 or 2) and/or local codes. The horizontal venting kits consist of two face plates and an insulating gasket to seal the exter...
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