Carrier 2-STAGE 58TMA Operations Instructions

58TMADownflow/Horizontal 2-Speed, 2-Stage,Induced-Combustion Gas FurnaceInstallation, Start-Up, and Operating InstructionsSizes 065-125, Series 120 an

Fig. 10—Horizontal Crawlspace Installation on Hanger RodsA96633NOTES:ANGLEIRON OREQUIVALENTROD LOCATIONUSING DIMPLELOCATORS(SEE DIMENSIONALDWG FORLOCA

Do not connect aluminum wire between disconnect switchand furnace. Use only copper wire.Make all electrical connections in accordance with the current

supply line pressure drop of 0.5-in. wc (based on a 0.60 specific gravity gas).Ref: Table 10-2, NFPA 54-1996.Make field 24-v connections at the 24-v t

2. Humidifier (HUM)Screw terminals (HUM-1 and COM) are provided for 24-vhumidifier connection. The terminals are energized with 24v,0.5-amp maximum wh

This furnace is equipped with 2 manual reset limit switches ingas control area. The switches will open and shut off powerto gas valve if a flame rollo

Fig. 18—Unit Wiring DiagramA00301LEGENDALS1 AUXILIARY LIMIT SWITCH, OVERTEMP. MANUAL RESET, SPST (N.C.)ALS2 AUXILIARY LIMIT SWITCH, OVERTEMP. AUTO

e. Blower on delay—If burner flame is proven, 45 sec aftergas valve GV is opened blower motor BLWM is energizedon appropriate heating speed, low-gas-h

thermostat is satisfied, blower motor BLWM operatesan additional 2 sec on high-cool speed before revertingback to continuous blower speed.(4.) When R

Never purge a line into a combustion chamber. Never usematches, candles, flame, or other sources of ignition to checkfor gas leakage. Use a soap-and-w

EXAMPLE:85,000 Btuh input furnace installed at 4300 ft.Furnace InputRate atSea LevelXDerateMultiplierFactor=Furnace Input Rateat InstallationAltitude8

ELECTROSTATIC DISCHARGE (ESD) PRECAUTIONSPROCEDUREElectrostatic discharge can affect electronic components.Take precautions during furnace installatio

Table 10—Model 58TMA Orifice Size and Manifold Pressure for Correct Input(Tabulated Data Based on 21,000 Btuh High Heat/13,500 Btuh Low Heat per Burne

Table 10—Model 58TMA Orifice Size and Manifold Pressure for Correct Input Continued(TABULATED DATA BASED ON 21,000 BTUH HIGH HEAT/13,500 BTUH LOW HEAT

Table 10—Model 58TMA Orifice Size and Manifold Pressure for Correct Input Continued(TABULATED DATA BASED ON 21,000 BTUH HIGH HEAT/13,500 BTUH LOW HEAT

c. Adjust air temperature rise by adjusting blower speed.Increase blower speed to reduce temperature rise. Decreaseblower speed to increase temperatur

burners, return-air opening should be unblocked. By using thismethod to check limit control, it can be established that thelimit is functioning proper

A94328SERVICE TRAININGPackaged Service Training programs are an excellent way to increase your knowledge of the equipment discussed in this manual, in

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Copyright 2000 CARRIER Corp. • 7310 W. Morris St. • Indianapolis, IN 46231Manufacturer reserves the right to discontinue, or change at any time, speci

INTRODUCTIONThe model 58TMA Series 120 and 130 Furnace is available insizes 65,000 through 123,000 Btuh input capacities.The design of the downflow/ho

Application of this furnace should be indoors with specialattention given to vent sizing and material, gas input rate, airtemperature rise, and unit s

HAZARDOUS LOCATIONSStep 2—Air for Combustion and VentilationProvisions for adequate combustion and ventilation air must beprovided in accordance with

When ducts are used, they must be of the same cross-sectional areaas the free area of the openings to which they connect. Theminimum dimension of duct

NOT cut main furnace casing to attach supply side air duct,humidifier, or other accessories. All accessories MUST be con-nected external to furnace ma

Use a backup wrench at furnace gas control when connectinggas pipe to furnace to avoid damaging gas controls ormanifold.Use the proper length of pipes

tapping is provided on gas value for test gage connection.Installation of additional 1/8-in. NPT plugged tapping, accessiblefor test gage connection,