valutazioni - 3, GPA: 4.3
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Individual vent connectors should be sized per the dedicated appliance tables shown in Section B. D. Venting Tables For Common Vents (One 58PAV Furnace and Gas Hot Water Heater) The information in this section refers to the installation of a common vent serving a 58PAV Furnace and a gas hot water heater. Tables 13 and 14 use typical hot water heater input rates of 40,000 Btuh or 50,000 Btuh. Refer to the water heater rating plate for input ratings of the installed equipment. 1. Size common vent and vent connector lengths using Tables 13 and 14. 2. Vent connectors should be as short and direct as possible. 3. Size gas water heater vent connector per National Fuel 10 Fig. 13—Common Vent With Water Heater (Typical Installation) Table 13—Common Vent (With No Lateral Run) Furnace and Water Heater (No Horizontal) 58PAV Size Vent Connector Length (Ft) Common Vent Height (Ft) Common Vent Dia (Ins.) Minimum Maximum* 035-ECt or 035-GCf 5 12 30 4 6 30 5 10 12 30 4 6 24 5 15 12 26 4 6 16 5 055-ECf or 055-GCt 5 18 30 4 8 30 5 10 20 30 4 8 30 5 15 20 30 4 8 30 5 075-GCf or 075- JCf 5 10 30 5 5 30 6 10 10 30 5 5 30 6 15 10 30 5 5 30 6 090-GCt, 090-JCf, or 090-LCf 5 14 30 5 6 30 6 10 14 30 5 6 30 6 15 14 30 5 6 30 6 110-JC* or 110-LCt 5 10 30 6 5 30 7 10 10 30 6 5 30 7 15 10 30 6 5 30 7 125-LCt 5 8 30 6 6 30 7 6 30 8 10 8 30 6 6 30 7 ' 6 30 8 15 10 30 6 6 30 7 6 30 8 *For applications requiring vent heights greater than 30 ft, contact your Distributor/Dealer for more information. -(-Installed with a 40,000 Btuh gas-fired water heater—typical size. ^Installed with a 50,000 Btuh gas-fired water heater—typical size. Gas Code. The 58PAV Furnace vent connector is sized per the tables in Section B of this publication to determine allowable lengths, number of elbows, and insulation requirements. The allowable vent connector length for the furnace cannot exceed 15 ft for any common vent installation or application, as shown in Tables 13 and 14. 4. Insulated vents and vent connectors may be required for certain applications. See Table 14. When insulation is required, it must be installed as indicated in Sections A.5. and A.6. 5. If the vent connector is exposed to ambient temperatures of 30 degrees Fahrenheit or less, it must be insulated, as indicated per Sections A.5. and A.6. 6. The vent connectors must be spaced within 3 ft of each other (3-ft rise). 7. Where possible, locate the vent closer to or directly over the smaller appliance connector. 8. For multi-story installation, refer to Appendix G of National Fuel Gas Code or Canadian standards CAN/ CGA.B149 for additional information to size the common vent. Individual vent connector for the furnace should be sized per single appliance tables found in Sec- Table 14—Common Vent (With 10 Ft Max. Lateral Run) Furnace and Water Heater 58PAV Size Vent Connector Length (Ft) Vent and Vent Conn Insulation Required Common Vent Height (Ft) Common Vent Dia (Ins.) Minimum Maximum* 035-ECt or 035-GCf 5 — 8 22 5 yes 6 30 10 — 8 14 5 yes 6 30 15 — NA NA 5 yes 6 30 055-ECf or 055-GCt 5 — 8 30 5 yes 8 30 10 — 10 30 5 yes 8 30 15 — 10 22 5 yes 8 30 075-GCf 5 — 10 30 5 or — 5 30 6 075-JCf 10 — 10 30 5 — 5 30 6 15 — 10 30 5 — 5 30 6 090-GCt, 5 — 14 30 5 090-JCt, — 6 30 6 or 10 — 14 30 5 090-LCf — 6 30 6 15 — 14 30 5 — 6 30 6 110-JCt 5 — 10 30 6 or — 5 30 7 110-LCt 10 — 10 30 6 — 5 30 7 15 — 10 30 6 — 5 30 7 125-LCt 5 — 10 30 6 — 8 30 7 — 6 30 8 10 — 10 30 6 — 8 30 7 — 6 30 8 15 — 10 30 6 — 8 30 7 — 6 30 8 *For applications requiring vent heights greater than 30 ft, contact your Distributor/Dealer for more information, tinstalled with a 40,000 Btuh gas-fired water heater—typical size. ^Installed with a 50,000 Btuh gas-fired water heater—typical size. 11 tion B. The water heater vent connector must be sized per the National Fuel Gas Code. E. Removal of Existing Furnaces From Common Vent Systems 1. These steps shall be followed with each appliance remaining connected to the common vent system placed in operation, while the other appliances remaining connected to the common vent system are not in operation. 2. Seal any unused openings in the common vent system. 3. Visually inspect the vent system for proper size and horizontal pitch, and determine there is no blockage or restriction, leakage, corrosion, and other deficiencies which could cause an unsafe condition. 4. Insofar as practical, close all building doors and windows and all doors between the space in which the appliances remaining connected to the common vent system are located and other spaces of the building. Turn on clothes dryers and any appliance not connected to the common vent system. Turn on any exhaust fans, such as range hoods and bathroom exhausts, so they operate at maximum speed. Do not operate a summer exhaust ...