Carrier 58CTA Installation And Service Instructions Manual

Also see for 58CTA: Product data Installation, start-up, operating and service and maintenance instructions

Carrier 58CTA Installation And Service Instructions Manual Manual pdf 24 page image

NOTE: Check that duct on side of furnace will not interfere withinstalled electrical box.2. Remove the desired electrical box hole knockout and positionthe hole in the electrical box over the hole in the furnacecasing.3. Fasten the electrical box to casing by driving two field-supplied screws from inside electrical box into casing steel.4. Remove and save two screws holding J-Box. (See Fig. 23.)5. Pull furnace power wires out of 1/2-inch diameter hole inJ-Box. Do not loosen wires from strain-relief wire-tie onoutside of J-Box.6. Route furnace power wires through holes in casing andelectrical box and into electrical box.7. Pull field power wires into electrical box.8. Remove cover from furnace J-Box.9. Route field ground wire through holes in electrical box andcasing, and into furnace J-Box.10. Reattach furnace J-Box to furnace casing with screws re-moved in Step 4.11. Secure field ground wire to J-Box green ground screw.12. Complete electrical box wiring and installation. Connect linevoltage leads as shown in Fig. 22. Use best practices (NEC inU.S. and CSA C22.1 in Canada) for wire bushings, strainrelief, etc.13. Reinstall cover to J-Box. Do not pinch wires between coverand bracket.POWER CORD INSTALLATION IN FURNACE J-BOXNOTE: Power cords must be able to handle the electrical require-ments listed in Table 7. Refer to power cord manufacturer’slistings.1. Remove cover from J-Box.2. Route listed power cord through 7/8-inch diameter hole inJ-Box.3. Secure power cord to J-Box bracket with a strain reliefbushing or a connector approved for the type of cord used.4. Secure field ground wire to green ground screw on J-Boxbracket.5. Connect line voltage leads as shown in Fig. 22.6. Reinstall cover to J-Box. Do not pinch wires between coverand bracket.BX CABLE INSTALLATION IN FURNACE J-BOX1. Remove cover from J-Box.2. Route BX cable into 7/8-inch diameter hole in J-Box.3. Secure BX cable to J-Box bracket with connectors approvedfor the type of cable used.4. Secure field ground wire to green ground screw on J-Boxbracket.5. Connect line voltage leads as shown in Fig. 22.6. Reinstall cover to J-Box. Do not pinch wires between coverand bracket.24-V WIRINGMake field 24-v connections at the 24-v terminal strip. (See Fig.32.) Connect terminal Y/Y2 as shown in Fig. 25-31 for propercooling operation. Use only AWG No. 18, color-coded, copperthermostat wire.The 24-v circuit contains an automotive-type, 3-amp fuse locatedon the control. Any direct shorts during installation, service, ormaintenance could cause this fuse to blow. If fuse replacement isrequired, use ONLY a 3-amp fuse of identical size.ACCESSORIES1. Electronic Air Cleaner (EAC)Connect an accessory Electronic Air Cleaner (if used) using1/4-in female quick connect terminals to the two male 1/4-inquick-connect terminals on the control board marked EAC-1and EAC-2. The terminals are rated for 115VAC, 1.0 ampsmaximum and are energized during blower motor operation.(See Fig. 32.)2. Humidifier (HUM)Connect an accessory 24 VAC, 0.5 amp maximum humidifer(if used) to the 1/4-in male quick-connect HUM terminal andCOM-24V screw terminal on the control board thermostat strip.The HUM terminal is energized when gas valve relay (GVR)is energized. (See Fig. 32.)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 to HUM(humidifier) terminal on Thermidistat, Zone Controller or similiardevice. See Thermidistat™, Zone Controller, thermostat, or con-troller manufacturer’s instructions for proper connection.VENTINGThe furnace shall be connected to a listed factory built chimney orvent or a clay-tile lined masonry or concrete chimney. Venting intoan unlined masonry chimney or concrete chimney is prohibited.When an existing Category I furnace is removed or replaced, theoriginal venting system may no longer be sized to properly ventthe attached appliances. An improperly sized Category I ventingsystem could cause the formation of condensate in the furnace andvent, leakage of condensate and combustion products, and spillageof combustion products into the living space.22→→→→