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

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Carrier 58MVP Installation, Start-up, And Operating Instructions Manual Manual pdf 17 page image

If a flexible connector is required or allowed by authorityhaving jurisdiction, black iron pipe shall be installed at gasvalve and extend a minimum of 2 in. outside furnace casing.An accessible manual shutoff valve MUST be installed upstreamof furnace gas controls and within 6 ft of furnace. A 1/8-in. NPTplugged tapping, accessible for test gage connection, MUST beinstalled immediately upstream of gas supply connection tofurnace and downstream of manual shutoff valve.NOTE: The gas valve inlet press tap connection is suitable to useas test gage connection providing test pressure DOES NOT exceedmaximum 0.5 psig (14-in. wc) stated on gas valve. (See Fig. 46.)Piping should be pressure tested in accordance with local andnational plumbing and gas codes before furnace has been attached.In Canada, 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), close manual shutoffvalve 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. 22 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 unitFig. 22—Heating and Cooling Application Wiring DiagramA95199115-VOLT FIELD-SUPPLIEDFUSEDDISCONNECT115-VOLTSINGLEPHASEAUXILIARYJ-BOXFURNACECONTROLCENTERTWO WIRE24-VOLTTERMINALBLOCKTHREE-WIREHEATINGONLYFIVEWIRENOTE 5NOTE 1NOTE3THERMOSTATTERMINALS FIELD-SUPPLIEDFUSED DISCONNECTCONDENSINGUNITRW2W C R G YGNDGNDGNDGNDFIELD 24-VOLT WIRINGFIELD 115-, 208/230-, 460-VOLT WIRINGFACTORY 24-VOLT WIRINGFACTORY 115-, 208/230-, 460-VOLT WIRING208/230- OR460-VOLTTHREEPHASE208/230-VOLTSINGLEPHASEW/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-volt 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.Table 3—Electrical DataUNITSIZEVOLTS—HERTZ—PHASEOPERATINGVOLTAGE RANGE MAXIMUMUNITAMPSUNITAMPACITY†MINIMUMWIRESIZEMAXIMUM WIRELENGTH (FT)‡MAXIMUM FUSE ORCKT BKR AMPS**Maximum* Minimum*040-14 115—60—1 127 104 8.9 12.0 14 31 15060-14 115—60—1 127 104 8.9 12.0 14 31 15080-14 115—60—1 127 104 8.9 12.0 14 31 15→080-20 115—60—1 127 104 13.8 17.9 12 32 20100-20 115—60—1 127 104 13.8 18.1 12 32 20→120-20 115—60—1 127 104 11.2 14.7 14 25 15* 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 fuse is recommended.17→