Carrier 58DLA Installation, Start-up, Operating And Service And Maintenance Instructions

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Carrier 58DLA Installation, Start-up, Operating And Service And Maintenance Instructions Manual pdf 24 page image

244. Secure field ground wire to green ground screw on J--Boxbracket.5. Connect line voltage leads as shown in Fig. 25.6. Reinstall cover to J--Box. Do not pinch wires betweencover and bracket.24--V WIRINGMake field 24--v connections at the 24--v terminal strip. (See Fig.23.) Connect terminal Y/Y2 as shown in Fig. 24 for propercooling operation. Use only AWG No. 18, color--coded, copperthermostat wire.The 24--v circuit contains an automotive--type, 3--amp. fuselocated on the control. Any direct shorts during installation,service, or maintenance could cause this fuse to blow. If fusereplacement is required, use ONLY a 3--amp. fuse of identicalsize.ACCESSORIES1. Electronic Air Cleaner (EAC)Connect an accessory Electronic Air Cleaner (if used) us-ing 1/4--in female quick connect terminals to the two male1/4--in quick--connect terminals on the control boardmarked EAC--1 and EAC--2. The terminals are rated for115 VAC, 1.0 amps maximum and are energized duringblower motor operation. (See Fig. 24.)2. Humidifier (HUM)Connect an accessory 24 VAC, 0.5 amp. maximum hu-midifier (if used) to the 1/4--in male quick--connect HUMterminal and COM--24V screw terminal on the controlboard thermostat strip. The HUM terminal is energizedwhen gas valve relay (GVR) is energized. (See Fig. 24.)NOTE: A field--supplied, 115--v controlled relay connected toEAC terminals may be added if humidifier operation is desiredduring blower operation.NOTE: DO NOT connect furnace control HUM terminal toHUM (humidifier) terminal on Thermidistatt, Zone Controlleror similar device. See Thermidistat, Zone Controller, thermostat,or controller manufacturer’s instructions for proper connection.BLWNUETRALSTATUS CODE LEDSEC-2 SEC-1EAC-2 L2FUSE 3-AMP0.5 AMP@24VACHUMTEST/TWINY1 DHUM G COM W/W1 Y/Y2 R24VPLT120 18090 150BLOWER OFF-DELAYPLT 1COOL HEAT SPARE-1 SPARE-2FANEAC-11-AMP@115VAC PR-1L1PL2 124-V THERMOSTATTERMINALS3-AMP FUSELED OPERATION &DIAGNOSTIC LIGHT115-VAC(L2)NEUTRALCONNECTIONSCOOLHEATSPARE-1SPARE-2 FANBLOWER SPEEDSELECTION TERMINALSEAC-1 TERMINAL(115-VAC 1.0 AMP MAX.)115 VAC (L1) LINEVOLTAGE CONNECTIONPL2-HOT SURFACEIGNITER & INDUCERMOTOR CONNECTORPL1-LOW VOLTAGE MAINHARNESS CONNECTORTRANSFORMER 24-VACCONNECTIONSHUMIDIFIER TERMINAL(24-VAC 0.5 AMP MAX.)TWINNING AND/ORCOMPONENT TESTTERMINALBLOWER OFF-DELAYA02142Fig. 24 -- Furnace Control58DL