Panasonic EAIRC-MJ Series Installation Instructions Manual

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Panasonic EAIRC-MJ Series Installation Instructions Manual Manual pdf 13 page image

13Heat insulation(Be sure to insulate the tubing after finishing leak inspection.)● Be sure to insulate the tubing.● Wrap insulators (field supply) having a thickness of 10 mmor more with heat resistance of 120 °C or more around thedischarge tubes and gas tubes, and insulators (field supply)with Heat resistance of 80 °C or more around the suctiontubes and liquid tubes.● Use the supplied thermal insulation tape to bind the areaswhere there are seams and gaps between the thermalinsulation that is wrapped around each tube.● Failure to conduct thermal insulation may cause waterleakage due to condensation.3-6. Installing the Refrigerant TubingThe size of the refrigerant tubing is as shown in the table below.Table 3-110EAIRC 15EAIRC 20/25EAIRCGas tubeinch (mm)Ø 5/8" (15.88)(Brazing)Ø 3/4" (19.05)(Brazing)Ø 7/8" (22.22)(Brazing)Liquid tubeinch (mm)Ø 3/8" (9.52)(Flare)Ø 3/8" (9.52)(Flare)Ø 3/8" (9.52)(Flare)● When brazing the gas tubing, cool the tubing with dampenedshopcloths as you work, as shown in the figure below, toprotect the unit’s thermistor from the heat generated bybrazing.Thermistor (inside unit)Dampened shopclothsGas tubingFig. 3-15● Be sure to insulate both the gas tubing and liquid tubing.In addition, wrap the supplied insulation material aroundthe tubing joints, and fasten in place with vinyl tape or othermeans. Failure to insulate the tubing may result in waterleakage from condensation.● Plug all gaps at tube through-holes in the unit with insulationor a similar substance to prevent air leakage.● When connecting air curtain type unit to a refrigerant systemwhere individual operation is possible, install 1 or 2 RAPvalve kits (CZ-P160RVK2) in parallel.(For details on connecting the RAP valve kit, refer to themanual that came with the kit.)4. ELECTRICAL WIRING4-1. General Precautions on Wiring(1) Before wiring, confirm the rated voltage of the unit asshown on its nameplate, then carry out the wiring closelyfollowing the wiring diagram.(2) Provide a power outlet to be used exclusively for each unitand a circuit breaker for overcurrent protection should beprovided in the exclusive line.(3) To prevent possible hazards from insulation failure, the unitmust be grounded.(4) Each wiring connection must be done in accordance withthe wiring system diagram. Wrong wiring may cause theunit to misoperate or become damaged.(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 be verydangerous. The manufacturer will accept no responsibilityfor any damage or misoperation that occurs as a result ofsuch unauthorized changes.(7) Regulations on wire diameters differ from locality tolocality. For field wiring rules, please refer to your LOCALELECTRICAL CODES before beginning.You must ensure that installation complies with all relevantrules and regulations.(8) To prevent malfunction of the air conditioner caused byelectrical noise, care must be taken when wiring as follows:● The remote control wiring and the inter-unit control wiringshould be wired apart from the inter-unit power wiring.● Use shielded wires for inter-unit control wiring between unitsand ground the shield on both sides.(9) If the power supply cord of this appliance is damaged,it must be replaced by a repair shop designated by themanufacturer, because special-purpose tools are required.4-2. Recommended Wire Length and Wire Diameterfor Power Supply SystemIndoor unitType (B) Power supply Time delay fuse orcircuit capacity2.5 mm 2EAIRC-MJ, EAIRC-MS Max. 130 m 10-16 AControl wiring(C) Inter-unit(betweenoutdoor andindoor units)control wiring(D) Remotecontrol wiring(E) Controlwiring forgroup control(F) Inter-Outdoor unitcontrol wiring0.75 mm 2(AWG #18)Use shieldedwiring*0.75 mm2(AWG #18)0.75 mm 2(AWG #18)0.75 mm 2(AWG #18)Use shieldedwiringMax. 1,000 m Max. 500 m Max. 200 m(Total) Max. 300 mNOTE* With ring-type wire terminal.