Panasonic CU-3KS19NBU Technical & Service Manual

Also see for CU-3KS19NBU: Operating instructions Installation manual

Contents

Panasonic CU-3KS19NBU Technical & Service Manual Manual pdf 108 page image

225. Wiring Instructions5-1. General Precautions on Wiring(1) Before wiring, confirm the rated voltage of the unit asshown on its nameplate, then carry out the wiringclosely following the wiring diagram.(2) Provide a power outlet to be used exclusively for eachunit, with a power supply disconnect and circuit break-er for overcurrent protection provided in the exclusiveline.(3) To prevent possible hazard due to insulation failure,the unit must be grounded.(4) Each wiring connection must be done tightly and inaccordance with the wiring system diagram. Wrongwiring may cause the unit to misoperate or becomedamaged.(5) Do not allow wiring to touch the refrigerant tubing,compressor, or any moving parts of the fan.(6) Unauthorized changes in the internal wiring can bevery dangerous. The manufacturer will accept noresponsibility for any damage or misoperation thatoccurs as a result of such unauthorized changes.5-2. Recommended Wire Length and DiameterRegulations on wiring diameter differ from locality to locality.For field wiring requirements, please refer to your local elec-trical codes. Carefully observe these regulations when car-rying out the installation.Table 6 shows maximum wire lengths for control line andpower line and fuse or circuit capacity.Refer to the wiring system diagram (Fig. 25a or 25b) for themeaning of (A), (B), and (C) in Table 6.Refer to your local codes or in the absence of local codessee the National Electric Code: ANSI/NFPA70.NOTETable 6AWG Max. Power Line Length (ft.)(A)Max. Control Line Length (ft.)(B) (C) FuseorCircuit CapacityModel (#12) (#14)CU-3KS19NBU 85 (Max.) 82 (Max.) 15 ACU-4KS24NBU 85 (Max.) 82 (Max.) 20 ACU-4KS31NBU 85 (Max.) 100 (Max.) 20 A# ... AWG (American Wire Gauge)