valutazioni - 3, GPA: 5
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Facilità d'uso
1. Seal any unused openings in the common venting system. 2. Visually inspect the venting 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. 3. Insofar as is practical, close all building doors and windows and all doors between the space in which the appliances remaining connected to the common venting system are located and other spaces of the building. Turn on clothes dryers and any appliances not connected to the common 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. Close fireplace dampers. 4. Place in operation the appliance being inspected. Follow the lighting instructions. Adjust thermostat so appliance will operate continuously. 5. Test for spillage at the draft hood relief opening after 5 minutes of main burner operation. Use the flame of a match or candle, or smoke from a cigarette, cigar, or pipe. 6. After it has been determined that each appliance remaining connected to the common venting system properly vents when tested as outlined above, return doors, windows, exhaust fans, fireplace dampers, and any other gas-burning appliance to their previous conditions of use. > 7. Any improper operation of the common venting system should be corrected so the installation conforms with the NFGC. When resizing any portion of the common venting system, the common venting system should be resized to approach the minimum size as determined using the appropriate tables in Part 11 of the NFGC in the United States or Appendix B or the NSCNGPIC in Canada. NOTE: It is recommended that existing gas vents be checked to be sure they meet local codes. OPTIONAL HORIZONTAL VENTING WITH POWER VENTER Horizontal venting with a power venter is an alternate method of sidewall venting. This boiler is A.G.A. and C.G.A. listed for sidewall venting with standard single wall galvanized or Type-B vent pipe when using 1 of the power venter kits listed in Table 4. These kits are specifically sized for these boilers. Some possible reasons for using a power venter for sidewall venting: 1. May be preferred by local codes 2. Need a vent piping run beyond 30 ft (but not more than 50 ft) —9— 3. Boiler installation site experiences gusting or high winds. A power venter can help prevent the boiler from short cycling due to gusting or high winds by providing vent exhaust pressures greater than the boiler’s induced draft blower alone. 4. When installer or homeowner prefers a negative pressure vent system instead of a positive pressure vent system. 5. May be more cost effective than stainless steel venting, particularly at longer vent lengths. The Fields Controls power vent kit includes either a SWG-II-4HD or SWG-II-5 power venter, a MG-1 4-in. barometric draft controller, and the CK-43D controls kit. Confirm that installing a power venter is an option allowed by local codes. For installation information, follow specific Installation Instructions provided with power venter kit. NOTE: Although the power venter is equipped with its own fan, the fan on the boiler MUST remain in place and unaltered when a power venter is used. When sidewall venting, flue gases must be vented to a point in relation to the prevailing wind so they may freely disperse without being blown back at the building causing discoloration, or into the building through doors or windows causing odors. Also, under certain conditions flue gases will condense, forming moisture. In such cases, steps should be taken to prevent building materials at the vent terminal from being damaged by the exhausted flue gas. When installing single wall galvanized vent pipe for power venting, follow specific power venter Installation Instructions for layout, location of barometric draft control, and termination connections. When joining and sealing single wall galvanized or Type-B vent piping, use RTV silicone sealant with a minimum temperature rating of 400°F. For 3-in vent pipe runs, begin with the female end of vent pipe over boiler’s induced draft blower outlet. For 4-in. vent pipe runs, begin with the 3-in. to 4-in. increaser fitting (included in boiler parts bag) over induced draft blower outlet. Then follow by placing female end of 4-in. vent pipe over increaser fitting. When joining pieces of single wall galvanized vent pipe, a substantial bead of silicone should be used at the joint to insure a leak-proof connection. GAS SUPPLY PIPING PROCEDURE 1—CHECKING GAS SUPPLY The gas pipe to boiler must be the correct size for length of run and for total Btuh input of all gas utilization equipment connected to it. See Table 5 for proper size. Be sure gas line complies with local codes and gas company requirements. The boiler and its individual shutoff valve must be disconnected from gas supply piping system during any pressure testing of gas supply piping system at...
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