Carrier 58DXT Operating Instructions Manual

Also see for 58DXT: User's information manual Service and maintenance instructions

Contents

Carrier 58DXT Operating Instructions Manual Manual pdf 9 page image

Install sediment trap in riser leading to furnace. The trap can beinstalled by connecting a tee to riser leading from furnace. Connectcapped nipple into lower end of tee. The capped nipple shouldextend below level of gas controls. (See Fig. 9.)After all connections have been made, purge lines and check forgas leakage with regulated gas supply pressure.Step 7—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 currentedition of the National Electrical Code (NEC) ANSI/NFPA70-1999 and any local codes or ordinances that might apply. ForCanadian installations, all electrical connections must be made inaccordance with CSA C22.1 Canadian Electrical Code or authori-ties having jurisdiction.NOTE: Proper polarity must be maintained for 115-v wiring. Ifpolarity is incorrect, the furnace control status LED will flashrapidly and prevent heating operation.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.24-V WIRINGRefer to ESD Precautions Procedure before proceeding with 24-vconnections.Make field 24-v connections at the 24-v terminal block. (See Fig.10.) Connect terminal Y/Y2 as shown in Fig. 11 or 12 for properoperation in cooling mode. Use AWG No. 18 color-coded, copperthermostat wire only.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. 10.) The terminals areenergized with 115v, 1-amp maximum during blower motoroperation.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 when the gas valve is energized.Do not connect furnace control HUM terminal to HUM(humidifier) terminal on Thermidistat™, Zone Controller, orsimilar device. See Thermidistat, Zone Controller, or thermo-stat manufacturer’s instructions for proper connection. Afailure to follow this warning could result in fire.Step 8—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 code such as NFGC in the UnitedStates, or the NSCNGPIC in Canada, for proper vent sizing andinstallation requirements.Fig. 9—Typical Gas Pipe Arrangement A89414GASSUPPLYMANUALSHUTOFFVALVE(REQUIRED)SEDIMENTTRAPUNIONFig. 10—Furnace Control A933481 2 34 5 67 8 9PR2L2COMPR1L1EAC-2EAC-1HI-COOLHI-GAS-HEATLO-GAS-HEATPARK3FU1SEC-1SEC-211 2 34 5 67 8 910 11 12MASTER SLAVETWINTESTLEDGRY/Y2W/W1COM24 VW21ONOFF1 2 3 4FURNACE ANDBLOWER OFF DELAYSETUP SWITCHES24-VOLTTHERMOSTATTERMINALSEAC - ELECTRONICAIR CLEANER(115-VAC 1 AMP MAX)3-AMPFUSELED -DIAGNOSTICLIGHTTWIN / TESTTERMINALHUM -HUMIDIFIER(24-VAC 0.5AMP MAX)HUM9→→→→