Carrier 58MTB Installation, Start-up, And Operating Instructions Manual

Also see for 58MTB: User's information manual Owner's manual Service and maintenance instructions

Step 8—Electrical ConnectionsSee Fig. 31, 32, and 50A-H for field wiring diagram showingtypical field 115-v and 24-v wiring. Check all factory and fieldelectrical connections for tightness.ELECTRICAL SHOCK HAZARDFailure to follow this warning could result in personal injuryor death.Blower access door switch opens 115-v power to furnacecontrol. No component operation can occur. Do not bypass orclose switch with panel removed.Field-supplied wiring shall conform with the limitations of 63°Frise.UNIT MAY NOT OPERATEFailure to follow this caution may result in intermittent unitoperation.Furnace control must be grounded for proper operation orcontrol will lock out. Control is grounded throughgreen/yellow wire routed to gas valve C-terminal and burnerbox screw.115-V WIRINGBefore proceeding with electrical connections, make certain thatvoltage, frequency, and phase correspond to that specified on thefurnace rating plate. Also, check to be sure that service providedby power supply is sufficient to handle load imposed by thisequipment. Refer to rating plate or Table 6 for equipment electricalspecifications.The furnace must be electrically grounded in accordance with localcodes; or in the absence of local codes, with the National ElectricCode ANSI/NFPA 70 and/or the Canadian Electric Code, CSAC22.1, Part I, if an external electrical source is utilized.Table 6—Electrical DataUNITSIZEVOLTS—HERTZ—PHASEOPERATINGVOLTAGE RANGE MAXUNITAMPSUNITAMPACITY†MINWIRESIZEMAX WIRELENGTH(FT)‡MAX FUSEOR CKT BKRAMPS**Max* Min*060–12 115-60-1 127 104 8.4 11.3 14 33 15080–12 115-60-1 127 104 8.1 10.8 14 34 15080–16 115-60-1 127 104 11.6 15.3 12 37 20100–16 115-60-1 127 104 11.6 15.4 12 37 20100–20 115-60-1 127 104 13.3 17.5 12 33 20120–20 115-60-1 127 104 12.9 16.8 12 34 20* Permissible limits of voltage range at which unit will operate satisfactorily.† Unit ampacity = 125 percent of largest operating component’s full load amps plus 100 percent of all other potential operating components’ (EAC, humidifier, etc.) fullload amps.‡ Length shown is measured 1 way along wire path between unit and service panel for maximum 2 percent voltage drop.** Time-delay type is recommended.Fig. 30—Typical Gas Pipe ArrangementCOMBUSTION-AIR PIPE GROMMETSGAS LINE GROMMETGAS LINECOMBUSTION-AIR PIPEVENT PIPEVENT PIPE GROMMETUNUSED 1/2 -IN.DIAMETER GASCONN. HOLEGAS LINE ENTRYHOLE FILLER PLUGNOTE: PIPE GROMMETS AND ENTRY HOLE FILLERPLUGS ARE INCLUDED IN FACTORY-SUPPLIEDLOOSE PARTS BAGA0505725→→