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

Also see for 58TUA: Service and maintenance instructions User's information manual User's information manual Installation, start-up, and operating instructions Installation, start-up, and operating instructions

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Carrier 58TUA Installation, Start-up, And Operating Instructions Manual Manual pdf 9 page image

Never purge a line into a combustion chamber. Never usematches, candles, flame, or other sources of ignition for thepurpose of checking leakage. Use a soap-and-water solutionto check for leakage. A failure to follow this warning cancause a fire, explosion, personal injury, or death.Step 8—Electrical Connections115-V WIRINGRefer to unit rating plate or Table 5 for equipment electricalrequirements. The control system requires an earth ground forproper operation.Do not connect aluminum wire between disconnect switchand furnace. Use only copper wire.Make all electrical connections in accordance with the NationalElectrical Code (NEC) ANSI/NFPA 70-1999 and local codes orordinances that might apply. For Canadian installations, all elec-trical connections must be made in accordance with CSA C22.1Canadian Electrical Code, or authorities having jurisdiction.The cabinet MUST have an uninterrupted or unbroken groundaccording to NEC ANSI/NFPA 70-1999 and Canadian Elec-trical Code, CSA C22.1 or local codes to minimize personalinjury if an electrical fault should occur. This may consist ofelectrical wire or conduit approved for electrical ground wheninstalled in accordance with existing electrical codes. Do notuse gas piping as an electrical ground.The junction box can be moved to left-hand side of furnace whena left-hand side power supply is desired. Remove 2 screws holdingjunction box. Mount junction box on left-hand side of furnace. Theblower door interlock switch must also be moved to left-hand sideof furnace due to length of wiring harness. (Holes have beenprovided in casing). When moved, tuck wiring harness behind clipprovided to keep extra wire lengths out of the way.NOTE: Proper polarity must be maintained for 115-v wiring. Ifpolarity is incorrect, the furnace control status LED will flashrapidly and prevent heating operation.24-V WIRINGRefer to ESD Precautions Procedure before proceeding with 24-vconnections.Make field 24-v connections at 24-v terminal block. (See Fig. 11.)Connect terminal Y/Y2 as shown in Fig. 9 or 10 for proper coolingoperation. Use only AWG No. 18 or larger, color-coded copperthermostat wire.The 24-v circuit contains an automotive-type, 3-amp fuse locatedon main control. Any 24-v electrical shorts during installation,service, or maintenance could cause this fuse to blow. If fusereplacement is required, use ONLY a 3-amp fuse. The control willflash code 24 when fuse needs replacement.ACCESSORIES1. Electronic air cleaner (EAC)A terminal block (EAC-1 [hot] and EAC-2 [neutral]) isprovided for EAC connection. (See Fig. 11.) The terminals areenergized with 115v, 1-amp maximum during blower motoroperation.2. Humidifier (HUM)Screw terminals (HUM and COM) are provided for 24-vhumidifier connection. The terminals are energized with 24v,0.5-amp maximum when the gas valve is energized.Step 9—VentingRefer to the enclosed Installation Instructions, (Vent Tables For 1-and 2-Stage Category I Fan-Assisted Furnaces) for quick, easyreference, and national or local installation code such as NationalFuel Gas Code NFPA 54-1996/ANSI Z223.1-1996 in the UnitedStates, or the National Standard of Canada Natural and PropaneInstallation Codes CAN/CGA-B149.1- and .2-M95 in Canada, forproper vent sizing and installation requirements.After fully assembling the vent connector to the furnace fluecollar, securely fasten the vent connector to the collar with 2field-supplied, corrosion-resistant, sheet metal screws located180 degrees apart and midway up the collar.The horizontal portion of the venting system shall maintain aminimum of 1/4-in. upward slope per linear ft, and it shall berigidly supported every 5 ft or less with hangers or straps toensure that there will be no movement after installation.Step 10—Start-Up, Adjustment, and Safety CheckGENERALThe furnace must have a 115-v power supply properly connectedand grounded. Correct polarity must be maintained to enable gasheating operation.Table 5—Electrical DataUNIT SIZEVOLTS—HERTZ—PHASEOPERATINGVOLTAGE RANGE MAXUNITAMPSMINWIREGAGEMAX WIRELENGTH (FT)‡MAXIMUM FUSE ORCKT BKR AMPS†Max* Min*040-12 115—60—1 127 104 11.4 14 32 15060-08 115—60—1 127 104 8.2 14 45 15060-12 115—60—1 127 104 10.6 14 34 15080-12 115—60—1 127 104 11.7 14 31 15080-16 115—60—1 127 104 13.4 14 27 15100-12 115—60—1 127 104 10.5 14 35 15100-16 115—60—1 127 104 13.2 14 28 15100-20 115—60—1 127 104 17.7 12 32 20120-16 115—60—1 127 104 13.2 14 28 15120-20 115—60—1 127 104 18.2 12 31 20135-20 115—60—1 127 104 17.4 12 33 20* Permissible limits of the voltage range at which the unit will operate satisfactorily.† Time-delay fuse is recommended.‡ Length shown is as measured 1 way along wire path between unit and service panel for maximum 2 percent voltage drop.9→→→