Panasonic CS-ME7CKPG Service Manual

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Panasonic CS-ME7CKPG Service Manual Manual pdf 76 page image

Outdoor Unit1 Installing Outdoor UnitWhen installing the outdoor unit, refer to “Precautions for Selecting the Location” and the “Indoor/outdoorUnit Installation Drawings.”If drain work is necessary, follow the procedures below.2 Drain Work(CU-3E23CBPG)Use drain plug for drainage.If the drain port is covered by a mounting base or floor surface, placeadditional foot bases of at least 30 mm in height under the outdoorunit’s feet.In cold areas, do not use a drain hose with the outdoor unit.(Otherwise, drain water may freeze, impairing heating performance.)(CU-4E27CBPG)1. Insert drain receiver (C) onto drain socket (A) and drain cap (B)beyond 4 projections around drain socket and drain cap.2. Insert drain socket and drain caps into their matching drain hole ;Drain socket (A) into drain hole I and drain caps (B) into drain hole IIand III. After insertion, turn them about 40 clockwise.3 Refrigerant Piping1. Align the centres of both flares and tighten the flare nuts 3 or 4 turns by hand. Then tighten them fully withthe torque wrenches.Use torque wrenches when tightening the flare nuts to prevent damage to the flare nuts and escaping gas.2. To prevent gas leakage, apply refrigeration machine oil on both inner and outer surfaces of the flare.(Use refrigeration oil for R-410A)4 Purging Air and Checking Gas LeakageWhen piping work is completed, it is necessary to purge the air and check for gas leakage.3. Connect vinyl hose on the market (intemal diameter of 25 mm) to drain socket (A)(If the house is too long and hangs down, fix it carefully to prevent the kinks.)Drain-water holeBottom frameDrain plug WhilepressingHose (availablecommercially, innerdia. 16mm)(C) Drain receiver(A) Drain socket (B) Drain cap(Be sure not to insert them into wrong drain holes, orthere causes water leakage.)(View from bottom)IIIIIIIf the drain holes of the outdoor unit are covered with the mounting bracket or the floor, raise the unit to providethe space of more than 100mm under the leg of the outdoor unit.NoteFlare nut tightening torqueFlare nut for 6.4Flare nut for 9.514.2-17.2N·m(144-175kgf·cm)32.7-39.9N·m(333-407kgf·cm)Valve cap tighteningtorqueLiquid pipe26.5-32.3N·m(270-330kgf·cm)Service port captightening torque10.8-14.7N·m(110-150kgf·cm)3P097711-1 (M02B043)5 Charging with RefrigerantIf the total length of piping for all rooms exceeds the figure listed below, additionally charge with 20 g ofrefrigerant (R-410A) for each additional meter of piping.6 Refrigerant Piping WorkCautions on Pipe HandlingProtect the open end of the pipe against dust and moisture.All pipe bends should be as gentle as possible. Use a pipebender for bending.(Bending radius should be 30 to 40 mm or larger.)Selection of Copper and Heat Insulation materialsWhen using commercial copper pipes and fittings, observe the following:Insulation material: Polyethylene foamHeat transfer rate: 0.041 to 0.052kW/mK (0.035 to 0.045 kcal/mh C)Refrigerant gas pipe’s surface temperature reaches 110 C max.Choose heat insulation materials that will withstand this temperature.Be sure to insulate both the gas and liquid piping and to provide insulationdimensions as below.Use separate thermal insulation pipes for gas and liquid refrigerant pipes.Outdoor capacity class CU-4E27 CBPG CU-3E23 CBPGTotal length of piping for all rooms 40 m 30 mPipe size Pipe insulationO.D : 6.4mm / Thickness : 0.8mmO.D : 9.5mm, 12.7mm / Thickness : 0.8mmO.D : 15.9mm / Thickness : 1.0mmI.D : 8-10mm / Thickness : 10mm min.I.D : 12-15mm / Thickness : 13mm min.I.D : 16-20mm / Thickness : 13mm min.Even though the shut-off valve is fully closed, the refrigerant may slowly leak out; do not leave the flare nutremoved for a long period of time.CAUTIONGas pipe Liquid pipeGas pipeinsulationLiquid pipeinsulationFinishing tape Drain hoseInter-unit wiringWallBe sure to placea cap.Rain If no flare cap isavailable, cover theflare mouth withtape to keep dirtor water out.76CS-ME7CKPG / CS-ME10CKPG / CS-ME12CKPG / CS-ME14CKPG / CS-ME18CKPG / CU-2E15CBPG / CU-2E18CBPG / CU-3E23CBPG / CU-4E27CBPG