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Hersteller: Allied Air Enterprises Dateigröße: 2.93 mb Dateiname: Unterrichtssprache:

Units installed at altitudes of 4501 - 10,000 feet (1373 to 3048 m) require a pressure switch change which can be ordered separately. Table 14 lists conversion kit and pressure switch requirements at varying altitudes. The combustion air pressure switch is factory-set and requires no adjustment. Page 36 of 48 Issue 1109 506725-01 Burner Orifice Conversion Kits at Varying Altitudes Unit Size 0 - 7,500 ft (0 - 2,286 m) 7,501 - 10,000 ft (2,286 - 3,038 m) Natural to LP/Propane LP/Propane to Natural High Altitude Natural Burner Orifice Kit High Altitude LP/Propane Burner Orifice Kit All 68W75*† 73W80* 51W01 68W70*† * Conversion requires installation of a gas valve regulator spring which is provided with the gas conversion kit. † LP kit includes low line pressure switch. A93 and 92G1 Pressure Switches at Varying Altitudes Unit Size 0 - 4,500 ft (0 - 1,373 m) 4,501 -7,500 ft (1,373 - 2,286 m) 7,501 - 10,000 ft (2,286 -3,038 m) All No Change No Change 74W91 Pressure switch is factory set. No adjustment necessary. All models use the factory installed pressure switch from 0 - 7,500 feet. A95 and 95G1 Pressure Switches at Varying Altitudes Unit Size 0 - 4,500 ft (0 - 1,373 m) 4,501 -7,500 ft (1,373 - 2,286 m) 7,501 - 10,000 ft (2,286 -3,038 m) 045 No Change No Change 74W90 070 No Change 77W43 73W22 090 No Change 77W42 73W22 110 No Change 77W43 73W22 135 No Change 77W42 73W22 Pressure switch is factory set. No adjustment necessary. All models use the factory installed pressure switch from 0 - 4,500 feet. TABLE 14 506725-01 Page 37 of 48 Issue 1109 Testing for Proper Venting and Sufficient Combustion Air for Non-Direct Vent Applications WARNING CARBON MONOXIDE POISONING HAZARD Failure to follow the steps outlined below for each appliance connected to the venting system being placed into operation could result in carbon monoxide poisoning or death. The following steps shall be followed for each appliance connected to the venting system being placed into operation, while all other appliances connected to the venting system are not in operation. After the gas furnace has been started, the following test should be conducted to ensure proper venting and sufficient combustion air has been provided to the unit as well as to other gas fired appliances which are separately vented. If this furnace replaces a Category I furnace which was commonly vented with another gas appliance, the size of the existing vent pipe for that gas appliance must be checked. Without the heat of the original furnace flue products, the existing vent pipe is probably oversized for the single water heater or other appliance. The vent should be checked for proper draw with the remaining appliance. The test should be conducted while all appliances (both in operation and those not in operation) are connected to the venting system being tested. If the venting system has been installed improperly, or if provisions have not been made for sufficient amounts of combustion air, corrections must be made as outlined in the previous section. 1. Seal any unused openings in the venting system. 2. Visually inspect the venting system for proper size and horizontal pitch. Determine there is no blockage or restriction, leakage, corrosion, or other deficiencies which could cause an unsafe condition. 3. To the extent that it is practical, close all building doors and windows and all doors between the space in which the appliances connected to the venting system are located and other spaces of the building. 4. Close fireplace dampers. 5. Turn on clothes dryers and any appliances not connected to the venting system. Turn on any exhaust fans, such as range hoods and bathroom exhausts, so they will operate at maximum speed. Do not operate a summer exhaust fan. 6. Follow the lighting instruction to place the appliance being inspected into operation. Adjust thermostat so appliance will operate continuously. 7. Use the flame of a match or candle to test for spillage of flue gases at the draft hood relief opening after 5 minutes of main burner operation. 8. If improper venting is observed during any of the above tests, the venting system must be corrected or sufficient combustion/makeup air must be provided. The venting system should be resized to approach the minimum size as determined by using the appropriate tables in appendix G in the current standards of the National Fuel Gas Code ANSI-Z223.1/NPFA 54 in the U.S.A., and the appropriate Natural Gas and Propane appliances venting sizing tables in the current standard of the CSAB149 Natural Gas and Propane Installation Codes in Canada. 9. After determining that each appliance remaining connected to the common venting system properly vents when tested as indicated in step 3, return doors, windows, exhaust fans, fireplace dampers and any other gas burning appliance to their previous condition of use. Page 38 of 48 Issue 1109 506725-01 506725-01 Issue 1109 Page 39 of 48 Other Unit Adjustments Primary Limit The primary limit is locate...

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