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

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Carrier 58MVP Installation, Start-up, And Operating Instructions Manual Manual pdf 20 page image

ELECTRICAL CONNECTIONSSee Fig. 28 for field wiring diagram showing typical field 115-vand 24-v wiring. Check all factory and field electrical connectionsfor tightness.Blower access door switch opens 115-v power to furnacecontrol. No component operation can occur. Do not bypass orclose switch with panel removed. Failure to follow thiswarning could result in personal injury or death.Furnace control must be grounded for proper operation orcontrol will lock out. Control is grounded throughgreen/yellow wire connected to gas valve and burner boxscrew.Step 1—115-v WiringBefore proceeding with electrical connections, make certain thatvoltage, frequency, and phase correspond to that specified onfurnace 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 4 for equipment electricalspecifications.Make all electrical connections in accordance with NationalElectrical Code (NEC) ANSI/NFPA 70-2002 and any local codesor ordinances that might apply. For Canadian installations, allelectrical connections must be made in accordance with CanadianElectrical Code CSA C22.1 or authorities having jurisdiction.Field-supplied wiring shall conform with the limitations of 63°F(33°C) rise.Use a separate branch electrical circuit containing a properly sizedfuse or circuit breaker for this furnace. See Table 4 for wire sizeand fuse specifications. A disconnecting means must be locatedwithin sight from and readily accessible to furnace.NOTE: Proper polarity must be maintained for 115-v wiring. Ifpolarity is incorrect, furnace control status code indicator light willflash rapidly and furnace will NOT operate.Table 4—Electrical DataUNITSIZEVOLTS—HERTZ—PHASEOPERATINGVOLTAGE RANGE MAXIMUMUNITAMPSMINIMUMWIRESIZEMAXIMUM WIRELENGTH (FT)‡MAXIMUM FUSE ORCKT BKR AMPS**Maximum* Minimum*040-14 115—60—1 127 104 8.9 14 31 15060-14 115—60—1 127 104 8.9 14 31 15080-14 115—60—1 127 104 8.9 14 31 15080-20 115—60—1 127 104 13.8 12 32 20100-20 115—60—1 127 104 13.8 12 32 20120-20 115—60—1 127 104 13.8 12 32 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 as measured 1 way along wire path between unit and service panel for maximum 2 percent voltage drop.** Time-delay type is recommended.Fig. 28—Heating and Cooling Application Wiring DiagramA98325115-VFIELD-SUPPLIEDDISCONNECTSWITCH115-VSINGLEPHASEAUXILIARYJ-BOXFURNACECONTROLCENTERTWO WIRE24-VTERMINALBLOCKTHREE-WIREHEATINGONLYFIVEWIRENOTE 5NOTE 1NOTE3THERMOSTATTERMINALS FIELD-SUPPLIEDDISCONNECTCONDENSINGUNITRW2W C R G YGNDGNDGNDGNDFIELD 24-V WIRINGFIELD 115-, 208/230-, 460-V WIRINGFACTORY 24-V WIRINGFACTORY 115-, 208/230-, 460-V WIRING208/230- OR460-VTHREE PHASE208/230-VSINGLEPHASEW/W1Y/Y2GCNOTES:1.2.3.4.5.Connect Y or Y/Y2 terminal as shown for proper cooling operation.Proper polarity must be maintained for 115-v wiring.Use W2 with 2-stage thermostat when zoning.If any of the original wire, as supplied, must be replaced, usesame type or equivalent wire.Some thermostats require a "C" terminal connection as shown.20→