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

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Carrier 58CVA Installation, Start-up, Operating And Service And Maintenance Instructions Manual pdf 16 page image

Piping should be pressure tested in accordance with the NFGC,national plumbing codes or local gas and plumbing codes beforethe furnace has been attached. For test pressures above 14-in. wc(0.5 psig), disconnect and cap the gas supply at the furnace. InCanada, refer to current edition of NSCNGPIC.If the test pressure is less than 14-in. w.c. (0.5 psig), turn offelectric shutoff switch located on the gas valve before the test. Itis recommended that the ground joint union be loosened beforepressure testing. After all connections have been made, purge thelines and check for gas leakage with regulated gas supply pressure.NOTE: The gas valve inlet pressure tap connection is suitable touse as test gage connection providing test pressure DOES NOTexceed maximum 0.5 psig (14-in. wc) stated on gas valve. (SeeFig. 47.)Step 7—Electrical ConnectionsSee Fig. 22 for field wiring diagram showing typical field 115-vwiring. Check all factory and field electrical connections fortightness.Blower access panel door switch opens 115-v power tocontrol. No component operation can occur. Do not bypass orclose switch with panel removed. Failure to follow thiswarning could result in personal injury or death.Furnace control must be grounded for proper operation orcontrol will lock out. Control is grounded through green wirerouted to gas valve and burner box screw.115-V WIRINGVerify that the voltage, frequency, and phase correspond to thatspecified on unit rating plate. Also, check to be sure that serviceprovided by utility is sufficient to handle load imposed by thisequipment. Refer to rating plate or Table 5 for equipment electricalspecifications. Make all electrical connections in accordance withNational Electrical Code (NEC) ANSI/NFPA 70-2002 and anylocal codes or ordinances that might apply. For Canadian instal-lations, all electrical connections must be made in accordance withCanadian Electrical Code CSA C22.1 or authorities having juris-diction.Do not connect aluminum wire between disconnect switchand furnace. Use only copper wire.Use a separate branch electrical circuit with a properly sized fuseor circuit breaker for this furnace. See Table 5 for wire size andfuse specifications. A readily accessible means of electricaldisconnect must be located within sight of the furnace.NOTE: Proper polarity must be maintained for 115-v wiring. Ifpolarity is incorrect, control LED status indicator light will flashrapidly and furnace will NOT operate.The cabinet MUST have an uninterrupted or unbroken groundaccording to NEC ANSI/NFPA 70-2002 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, conduit approved for electrical ground or alisted, grounded power cord (where permitted by local code)when installed in accordance with existing electrical codes.Refer to the power cord maufacturer’s ratings for proper wiregage. Do not use gas piping as an electrical ground. Failure tofollow this warning could result in electrical shock, fire, ordeath.J-BOX RELOCATIONNOTE: If factory location of J-Box is acceptable, go to nextsection (J-Box Cover Installation).NOTE: On 14″ wide casing models, the J-Box cannot be relo-cated to other side of furnace casing when the vent pipe is routedwithin the casing.1. Remove screws holding auxiliary J-box. (See Fig. 23.)2. Cut wire tie on loop in wires to J-box.3. Locate box to desired location.4. Fasten J-Box to casing with screw.5. Route J-box wires within furnace away from sharp edges andhot surfaces.6. Route electrical wires through hole in J-box and secureelectrical box or cable to J-box.7. Attach electrical leads as shown in Fig. 22 and secure groundwire to green ground screw in J-Box.ELECTRICAL CONNECTION TO J-BOX1. Attach electrical box to J-Box bracket.2. Route wires through hole in electrical box and J-Box bracket.3. Secure ground wire to green screw on J-Box bracket.4. Connect line voltage leads as shown in Fig. 22.FOR POWER CORD INSTALLATIONPower cords must be able to handle the electrical requirementslisted in Table 5. Refer to power cord manufacturer’s listings.1. Route listed power cord through hole in J-Box.2. Secure power cord to J-Box bracket with a strain reliefbushing or a connector approved for the type of cord used.3. Secure ground wire to green screw on J-Box bracket.4. Connect line voltage leads as shown in Fig. 22.FOR BX CABLE INSTALLATION1. Route BX cable to hole in J-Box.2. Secure BX cable to J-Box bracket with connectors approvedfor the type of cable used.Fig. 21—Typical Gas Pipe ArrangementA02035UNIONSEDIMENTTRAPMANUALSHUTOFFVALVE(REQUIREDGASSUPPLY15