Carrier 40QA024-060 Installation, Start-up And Service Instructions Manual

Contents

10Step 6 — Make Electrical Connections — Be surefield wiring complies with local building codes and NEC, andunit voltage is within limits shown in Table 5.Contact local power company for correction of improperline voltage.NOTE: Use copper wire only between disconnect switch(es)and unit.NOTE: Install branch circuit disconnect of adequate size tohandle unit starting current per NEC. Locate disconnect withinsight of, and readily accessible from, unit, per Section 440-14of NEC. Some codes allow indoor unit to share disconnect withoutdoor unit if disconnect can be locked; check local codebefore installing in this manner.1. Route ground and power wires.2. Route line power leads (see Fig. 16) from indoor dis-connect to the fan coil unit. Place wire through hole onthe control box (Fig. 17). Connect wire to high voltageterminal board (TB1) and ground screw. When routingthe wire in the unit, use care to keep the wire awayfrom refrigerant and condensate piping and any sharpedges. The 208/230-v units are factory wired for230-v to 24-v transformer operation. For 208-v to24-v operation, interchange blue (208-v) and red(230-v) wires. Cap any unused wires with wire nuts.Table 5 — Electrical Data*LEGEND *All units are 208/230-1-60. Minimum operating voltage is 187, max-imum is 253. Units will operate satisfactorily within this voltagerange.†Electrical data is the same for both the 24,000 Btuh 024 unit andthe 024 unit that has been field-reconfigured for 18,000 Btuh. Referto Before Installation section on page 3 for reconfiguration details.To avoid personal injury or damage to unit, do not makeelectrical connections until all power sources are shutdown, locked out, and tagged off. Failure to do so couldresult in personal injury or unit damage.Operation of unit on improper line voltage constitutes abuseand could affect warranty. Refer to Table 5 for permissibleoperating limits. Do not install unit in system where voltagemay fluctuate above or below permissible limits.According to NEC and most local codes, the unit must havean uninterrupted, unbroken ground to minimize personalinjury if an electric fault should occur. The ground mayconsist of electrical wire or metal conduit when installed inaccordance with existing electrical codes. Failure to followthis warning could result in an electric shock, fire, or death.SYSTEMTYPEUNITSIZEFAN HEATER POWER MIN WIRE SIZE(AWG)Motor 1 FLA Motor 2 FLA kW FLA MCA MOCP FLACOOLINGONLY024† 0.5 — — — 0.53 15 0.50 14036 1.3 — — — 1.60 15 1.30 14048 1.1 0.5 — — 2.00 15 1.60 14060 1.3 1.3 — — 3.30 15 2.60 14HEAT PUMP024† 0.5 — 2.00 8.66 9.29 15 9.16 14036 1.3 — 3.00 13.00 17.70 20 14.30 14048 1.0 0.5 4.00 17.40 23.80 25 19.00 12060 1.3 1.3 5.00 21.70 28.70 30 24.30 10AWG — American Wire GageFLA — Full Load AmpsMCA — Minimum Circuit Amps per NEC Section 430-24MOCP — Maximum Overcurrent ProtectionNEC — National Electrical Code