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See Fig. 16. The internal timeclock has a 10-hour minimum back-up time to provide for unit power off for servicing unit or during unexpected power outages. For complete Carrier Comfort System (CCS) or Carrier Comfort Network (CCN) features and benefits, refer to the product literature. Step 8 — Make Electrical Connections POWER WIRING — Units are factory wired for the voltage shown on the unit nameplate. When installing units, provide a disconnect per NEC (National Electrical Code) of adequate size (MOCP [maximum overcurrent protection] of unit is on the informative plate). All field wiring must comply with NEC and all local codes. Size wire based on MCA (minimum circuit amps) on the unit informative plate. See Fig. 17 for power wiring connections to the unit power terminal block and equipment ground. The main power terminal block is suitable for use with aluminum or copper wire. See Fig. 17. Units have circuit breakers for compressors, fan motors, and control circuit. If required by local codes, provide an additional disconnect switch. Whenever external electrical sources are used, unit must be electrically grounded in accordance with local codes, or in absence of local codes, with NEC, ANSI C1-latest year. All field wiring must comply with NEC and local code requirements. FIELD POWER SUPPLY — Unit is factory wired for voltage shown on unit nameplate. See Table 4 for electrical data. Field wiring can be brought into the unit from bottom (through basepan and roof curb) or through side of unit (corner post next to control box). A31.2-in. NPT coupling for field power wiring and a 3.4-in. NPT coupling for 24-v control wiring are provided in basepan. In the side post, there are two 21.2-in. (024-034) or 3-in. (038-048) knockouts for the field power wiring. See Fig. 3-6. If control wiring is to be brought in through the side of unit, a 7.8-in. diameter hole is provided in the condenser side post next to the control box. If disconnect box is mounted to corner post, be careful not to drill any screws into the condenser coil. Routing Through Bottom of Unit — If wiring is brought in through bottom of unit, use field-supplied watertight conduit to run power wiring from basepan out through bottom 31.2-in. hole to the disconnect box and back into unit to the main control box. Use strain relief going into control box through 21.2-in. diameter hole provided. After wires are in unit control box, connect to power terminal block (see Power Wiring section above). Low-voltage wiring must be run in watertight conduit from the basepan to control box and through 7.8-in. diameter hole provided in bottom of unit control box. Field-supplied strain relief must be used going into the box. After wiring is in control box, make connections to proper terminals on terminal blocks (see Field Control Wiring section on page 21). Install conduit connector in unit basepan as shown in Fig. 3-6. Route power and ground lines through connector to terminal connections in unit control box as shown on unit wiring diagram and Fig. 17. Routing Through Side of Unit — Route power wiring in field- supplied watertight conduit into unit through 21.2-in. hole. See Fig. 17. Use field-supplied strain relief going into control box through 21.2-in. diameter hole provided. After wires are in unit control box, connect to power terminal block (see Power Wiring section on this page). Bring low-voltage control wiring through factory-drilled 7.8-in. diameter hole in condenser side post. Use strain relief going into 7.8-in. diameter hole in bottom of unit control box. After wiring is in control box, make connection to proper terminals on terminal blocks (see Field Control Wiring section on page 21). 16 1717 LEGEND CCN — Carrier Comfort Network N.O. — Normally Open *Where X is the unit control software version number. COM — Common R— Relay D— Diode SIO — Serial Input/Output LED — Light-Emitting Diode SW — Switch N.C. — Normally Closed T— Terminal Fig. 16 — Control Board Diagram Table 4 — Electrical Data UNIT SIZE 48E NOMNAL VOLTAGE (3 Ph 60 Hz) VOLTAGE RANGE COMPRESSOR OFM IFM POWER EXHAUST COMBUSTION FAN MOTOR POWER SUPPLY No. 1 No. 2 Min Max RLA LRA RLA LRA Qty Hp FLA (ea) Hp FLA FLA LRA FLA MCA MOCP* 024 208/230 187 254 39.1 228 25.6 160 2 1 5.3 5 16.7/ 15.2 — — 0.96 101.8/100.3 125/125 23.6 41.6 0.96 125.4/123.9 150/150 10 30.8/ 28.0 — — 0.96 115.9/113.1 150/150 23.6 41.6 0.96 139.5/136.7 175/175 15 46.2/ 42.0 — — 0.96 131.3/127.1 150/150 23.6 41.6 0.96 154.9/150.7 175/175 460 414 508 19.9 114 11.5 80 2 1 2.7 5 7.6 — — 0.50 49.4 60 12.6 23.6 0.50 62.0 80 10 14.0 — — 0.50 55.8 70 12.6 23.6 0.50 68.4 80 15 21.0 — — 0.50 62.8 80 12.6 23.6 0.50 75.4 90 575 518 632 16.0 91 9.6 64 2 1 2.4 5 6.1 — — 0.50 40.5 50 12.6 23.6 0.50 53.1 60 10 11.0 — — 0.50 45.4 60 12.6 23.6 0.50 58.0 70 15 17.0 — — 0.50 51.4 60 12.6 23.6 0.50 64.0 80 028 208/230 187 254 39.1 228 39.1 228 2 1 5.3 7.5 24.2/ 22.0 — — 0.96 122.8/120.6 150/150 23.6 41.6 0.96 146.4/144.2 175/175 10 30.8/ 28.0 — — 0.9...

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