Step 4 — Make Electrical Connections
Unit cabinet must have an uninterrupted, unbroken electri- cal ground to minimize the possibility of personal injury if an electrical fault should occur. This ground may consist of electrical wire connected to unit ground lug in control com- partment, or conduit approved for electrical ground when installed in accordance with NEC, and local electrical codes. Failure to follow this warning could result in the installer being liable for the personal injury of others.
Unit failure as a result of operation on improper line voltage or excessive phase imbalance constitutes abuse and may cause damage to electrical components. Such opera- tion would invalidate any applicable Carrier warranty.
Before performing service or maintenance, be sure indoor unit main power switch is turned OFF and indoor blower has stopped. Failure to do so may result in electrical shock or injury from rotating fan blades.
CONTROL CIRCUIT WIRING — Control voltage is 24 v (40 va minimum). See Fig. 5 and unit label diagram for field- supplied wiring details. Route control wire through opening in unit side panel to connection in unit control box.
NOTE: For wire runs up to 50 ft, use no. 18 AWG (American Wire Gage) insulated wire. For 50 to 75 ft, use no. 16 AWG insulated wire. For over 75 ft, use 14 AWG insulated wire.
NOTE: All wiring must conform to NEC and local codes.
NOTE: Operating unit on improper line voltage constitutes abuse and could affect Carrier warranty. See Tables 2 and 3. Do not install unit in a system where voltage may fluctuate above or below permissible limits.
See Tables 2 and 3 for recommended fuse sizes. When mak- ing electrical connections, provide clearance at the unit for re- frigerant piping connections.
NOTE: The 38HDF units are supplied with a
POWER WIRING — Unit is factory wired for voltage shown on nameplate. Provide adequate, fused disconnect switch within sight from unit, readily accessible, but out of reach of children. Provision for locking the switch open (off) is advis- able to prevent power from being turned on while unit is being serviced. Disconnect switch, fuses, and field wiring must comply with the NEC and local code requirements. Use copper wire only between the disconnect switch and unit. Use minimum 60 C wire for the field power connection.
Route power wires through the opening in unit side panel and connect in the unit control box as shown on the unit label diagram and Fig. 6 and 7. Unit must be grounded.
CONNECTIONS TO
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NOTE: For more information see schematic inside unit.
Fig. 5 — Typical Control Circuit Connections
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