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

Also see for 58MSA Series: Service and maintenance instructions User manual Instruction manual Installation, start-up, and operating instructions Installation, start-up, and operating instructions

Contents

Carrier 58MSA Installation, Start-up, And Operating Instructions Manual Manual pdf 19 page image

national plumbing and gas codes before furnace is attached. InCanada, refer to current edition of NSCNGPIC. If pressureexceeds 0.5 psig (14-in. wc), gas supply pipe must be disconnectedfrom furnace and capped before pressure test. If test pressure isequal to or less than 0.5 psig (14-in. wc), turn off electric shutoffswitch located on gas valve before test. It is recommended thatground joint union be loosened before pressure testing. After allconnections have been made, purge lines and check for leakage.ELECTRICAL CONNECTIONSSee Fig. 24 for field wiring diagram showing typical field 115-vand 24-v wiring. Check all factory and field electrical connectionsfor tightness.Blower access panel door switch opens 115-v power tocontrol center. No component operation can occur. Do notbypass or close switch with panel removed. Failure to followthis warning could result in personal injury or death.Furnace control must be grounded for proper operation orcontrol will lock out. Control is grounded through green wirerouted to gas valve and burner box screw.Step 1—115-v WiringBefore proceeding with electrical connections, make certain thatvoltage, frequency, and phase correspond to that specified on unitrating plate. Also, check to be sure that service provided by utilityis sufficient to handle load imposed by this equipment. Refer torating plate or Table 3 for equipment electrical specifications.Make all electrical connections in accordance with NationalElectrical Code (NEC) ANSI/NFPA 70-1999 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 subauthorities having jurisdiction.Use a separate, fused branch electrical circuit containing a properlysized fuse or circuit breaker for this furnace. See Table 3 for wiresize and fuse specifications. A disconnecting means must belocated within sight from and readily accessible to furnace.Fig. 24—Heating and Cooling Application Wiring Diagram A98209115-VFIELD-SUPPLIEDDISCONNECTAUXILIARYJ-BOXCONTROLBOX24-VTERMINALBLOCKTHREE-WIREHEATING-ONLYFIVEWIRENOTE 1NOTE 2FIELD-SUPPLIEDDISCONNECTCONDENSINGUNITTWOWIREFURNACERGCW C R G YGNDGNDFIELD 24-V WIRINGFIELD 115-, 208/230-, 460-V WIRINGFACTORY 24-V WIRINGFACTORY 115-V WIRING208/230- OR460-VTHREEPHASE208/230-VSINGLEPHASEWHTBLKWHTBLKNOTES: Connect Y-terminal as shown for proper operation.Some thermostats require a "C" terminal connection as shown.If any of the original wire, as supplied, must be replaced, usesame type or equivalent wire.WYGNDTHERMOSTATTERMINALS1.2.3.Table 3—Electrical DataUNITSIZEVOLTS—HERTZ—PHASEOPERATINGVOLTAGE RANGE MAXUNITAMPSUNITAMPACITY†MINWIRESIZEMAX WIRELENGTH (FT)‡MAX FUSE ORCKT BKR AMPS**Max* Min*040-08 115—60—1 127 104 6.1 8.4 14 44 15040-12 115—60—1 127 104 7.3 10.0 14 37 15060-08 115—60—1 127 104 6.1 8.4 14 44 15060-12 115—60—1 127 104 7.1 9.8 14 38 15060-16 115—60—1 127 104 9.5 12.8 14 29 15080-12 115—60—1 127 104 7.6 10.4 14 36 15080-16 115—60—1 127 104 10.0 13.4 14 28 15080-20 115—60—1 127 104 14.1 18.4 12 31 20100-16 115—60—1 127 104 10.2 13.5 14 27 15100-20 115—60—1 127 104 14.8 19.3 12 30 20120-20 115—60—1 127 104 14.6 19.1 12 30 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.19