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

Also see for 58UHV Series: Installation, start-up, and operating instructions User's information manual Installation, start-up, and operating instructions Installation, start-up, and operating instructions

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Carrier 58UHV Installation, Start-up, And Operating Instructions Manual Manual pdf 10 page image

The cabinet MUST have an uninterrupted or unbroken groundaccording to NEC ANSI/NFPA 70-1996 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 the left-hand side of the furnacewhen a left-hand side power supply is desired. Remove the 2screws holding the junction box. Mount the junction box on theleft-hand side of the furnace. Holes have been provided in casing.When moved, tuck the wiring harness behind the clip provided tokeep 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 the 24-v terminal block. (See Fig.13.) Connect terminal Y/Y2 as shown in Fig. 11 or 12 for propercooling operation. Use only AWG No. 18 or larger, color-codedcopper thermostat wire.The 24-v circuit contains an automotive-type, 3-amp fuse locatedon the 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 the fuse needs replacement.ACCESSORIES1. Electronic air cleaner (EAC)A terminal block (EAC-1 [hot] and EAC-2 [neutral]) isprovided for EAC connection. (See Fig. 13.) The terminals areenergized with 115v, 1-amp maximum during blower motoroperation.2. Humidifier (HUM)Screw terminals (HUM and COM 24V) are provided for 24-vhumidifier connection. The terminals are energized with 24v,0.5-amp maximum when the gas valve is energized.Step 8— VentingRefer to the enclosed Installation Instructions, GAMA VentingTables for Category I Furnaces, and Venting for 2-stage CategoryI fan-assisted furnaces. In Canada use venting tables found inCAN/CGA B149.1 or .2-M91 Amendment No. 1. The horizontalportion of the venting system shall maintain a minimum of 1/4-in.upward slope per linear ft (away from furnace), and it shall berigidly supported every 5 ft or less with hangers or straps to ensurethat there will be no movement after installation.Fig. 12—Heating and Cooling Application Wiring Diagram 2-Stage Thermostat and Condensing UnitA96060115-VOLT FIELD-SUPPLIEDFUSEDDISCONNECTJUNCTIONBOXCONTROLBOX24-VOLTTERMINALBLOCKFOUR-WIREHEATING-ONLYSEVENWIRE2-STAGETHERMOSTATTERMINALS FIELD-SUPPLIEDFUSED DISCONNECT2-SPEEDCONDENSINGUNITFURNACEGRW2 Y2 G Y1GNDGNDFIELD 24-VOLT WIRINGFIELD 115-, 208/230-, 460-VOLT WIRINGFACTORY 24-VOLT WIRINGFACTORY 115-VOLT WIRING208/230- OR460-VOLTTHREEPHASE208/230-VOLTSINGLEPHASEY2Y1CWHTBLKWHTBLKW1C RW2COMW/W1Y/Y2Y1AFSNOTE 2NOTE 1Connect Y1 and Y/Y2 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.NOTES: 1.2.3.Fig. 13—Furnace ControlA952311 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/W1C OM24 VW21ONOFFFURNACE ANDBLOWER OFF DELAYSETUP SWITCHES24-VOLTTHERMOSTATTERMINALSEAC - ELECTRONICAIR CLEANER(115-VAC 1 AMP MAX)3-AMPFUSELED -DIAGNOSTICLIGHTTWIN / TESTTERMINALHUM -HUMIDIFIER(24-VAC 0.5AMP MAX)HUM10→→