Carrier 58CTA Installation And Service Instructions Manual

Also see for 58CTA: Product data Installation, start-up, operating and service and maintenance instructions

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Refer to Table 6 for recommended gas pipe sizing. Risers must beused to connect to furnace and to meter. Support all gas pipingwith appropriate straps, hangers, etc. Use a minimum of 1 hangerevery 6 ft. Joint compound (pipe dope) should be applied sparinglyand only to male threads of joints. Pipe dope must be resistant tothe action of propane gas.FIRE OR EXPLOSION HAZARDFailure to follow this warning could result in personal injury,death, and/or property damage.If local codes allow the use of a flexible gas applianceconnector, always use a new listed connector. Do not use aconnector which has previously served another gas appliance.Black iron pipe shall be installed at the furnace gas controlvalve and extend a minimum of 2 in. outside the furnace.FURNACE OVERHEAT HAZARDFailure to follow this caution may result in property damage.Connect gas pipe to furnace using a backup wrench to avoiddamaging gas controls and burner misalignment.An accessible manual equipment shutoff valve MUST be installedexternal to furnace casing and within 6 ft of furnace. A 1/8-in. NPTplugged tapping, accessible for test gauge connection, MUST beinstalled immediately upstream of gas supply connection tofurnace and downstream of manual equipment shutoff valve.NOTE: The furnace gas control valve inlet pressure tap connec-tion is suitable to use as test gauge connection providing testpressure DOES NOT exceed maximum 0.5 psig (14-in. wc) statedon gas control valve. (See Fig. 52.)Some installations require gas entry on right side of furnace (asviewed in upflow). (See Fig. 21a.)Install a sediment trap in riser leading to furnace as shown in Fig21b. Connect a capped nipple into lower end of tee. Capped nippleshould extend below level of furnace gas controls. Place a groundjoint union between furnace gas control valve manifold andexterior manual equipment gas shutoff valve.A 1/8-in. NPT plugged tapping, accessible for test gauge connec-tion, MUST be installed immediately upstream of gas supplyconnection to furnace and downstream of manual equipmentshutoff valve.Piping should be pressure and leak tested in accordance withNFGC in the United States or NSCNGPIC in Canada, local, andnational plumbing and gas codes before the furnace has beenconnected. After all connections have been made, purge lines andcheck for leakage at furnace prior to operating furnace.If pressure exceeds 0.5 psig (14-in. wc), gas supply pipe must bedisconnected from furnace and capped before and during supplypipe pressure test. If test pressure is equal to or less than 0.5 psig(14-in. wc), turn off electric shutoff switch located on furnace gascontrol valve and accessible manual equipment shutoff valvebefore and during supply pipe pressure test. After all connectionshave been made, purge lines and check for leakage at furnace priorto operating furnace.The gas supply pressure shall be within the maximum andminimum inlet supply pressures marked on the rating plate withthe furnace burners ON and OFF.ELECTRICAL CONNECTIONSELECTRICAL SHOCK HAZARDFailure to follow this warning could result in serious personalinjury or death.Blower access panel door switch opens 115-v power tocontrol. No component operation can occur. Do not bypass orclose switch with panel removed.See Fig. 22 for field wiring diagram showing typical field 115-vwiring. Check all factory and field electrical connections fortightness.Field-supplied wiring shall conform with the limitations of 63°F(33°C) rise.Table 6—Maximum Capacity of Pipe*NOMINALIRONPIPESIZE(IN.)INTERNALDIAMETER(IN.)LENGTH OF PIPE (FT)10 20 30 40 501/2 0.622 175 120 97 82 733/4 0.824 360 250 200 170 1511 1.049 680 465 375 320 2851-1/4 1.380 1400 950 770 660 5801-1/2 1.610 2100 1460 1180 990 900* Cubic ft of natural gas per hr for gas pressures of 0.5 psig (14–in. wc) or lessand a pressure drop of 0.5–in wc (based on a 0.60 specific gravity gas).Ref: Table 12.2 ANSI Z223-2002/NFPA 54-2002.Fig. 21a—Right Side Gas Entry ExampleA0232790° Elbow2" NippleStreet ElbowGas ValveFig. 21b—Typical Gas Pipe ArrangementA02035UNIONSEDIMENTTRAPMANUALSHUTOFFVALVE(REQUIREDGASSUPPLY19→→→