Daikin FXLQ20P2VEB Installation And Operation Manual

Also see for FXLQ20P2VEB: Technical data

Contents

Installation and operation manual5 FXLQ20~63P2VEB + FXNQ20~63P2VEBVRV System air conditioners4P323720-1 – 2012.06 For FXNQ units onlyRefrigerant piping workFor refrigerant piping of outdoor unit, refer to the installation manualsupplied with the outdoor unit.Before rigging tubes, check which type of refrigerant is used. Use a pipe cutter and flare suitable for the used refrigerant. To prevent dust, moisture or other foreign matter from infiltratingthe tube, either pinch the end, or cover it with tape. Use copper alloy seamless pipes (ISO 1337). The outdoor unit is charged with refrigerant. To prevent water leakage, execute heat insulation workcompletely on both sides of the gas and liquid piping. Whenusing a heat pump, the temperature of the gas piping can reachup to approximately 120°C. Use insulation which is sufficientlyheat resistant. Be sure to use both a spanner and torque wrench together whenconnecting or disconnecting pipes to/from the unit. Do not mix anything other than the specified refrigerant, such asair, etc..., inside the refrigerant circuit. Flares should not be re-used. New ones should be made inorder to prevent leaks.Only use annealed flare nuts included with the unit. Usingdifferent flare nuts may cause the refrigerant to leak. Refer to the table below for the dimensions of flare nut spacesand the appropriate tightening torque. (Overtightening maydamage the flare and cause leaks.) When connecting the flare nut, coat the flare inner surface withether oil or ester oil and initially tighten 3 or 4 turns by handbefore tightening firmly. Finally, insulate as shown in the figure below.X Height to reduceNOTE When mounting the unit to a wall, operating sound maybecome bigger.All field piping must be provided by a licensed refrigerationtechnician and must comply with the relevant local andnational codes.Place Installation period Protection methodMore than a month Pinch the pipeLess than a monthPinch or tape the pipeRegardless of the period13910898101312121111243XXPipe gauge(mm)Tighteningtorque (N•m)Flare dimensionA (mm) Flare shapeØ6.4 15~17 8.7~9.1Ø9.5 33~39 12.8~13.2Ø12.7 50~60 16.2~16.6Ø15.9 63~75 19.3~19.7 Be sure to insulate local piping all the way into thepipe connections inside the unit.Exposed piping may cause condensation or maycause burns when touched. After all piping has been connected, use nitrogen toperform a gas leak check. A toxic gas may bereleased by the refrigerant gas leaking indoor andbeing exposed to flames from an area heater, cookingstove, etc. If the refrigerant gas leaks during the work,ventilate the area.1 Insulation for gas pipe (accessory part)2 Sealing pad (accessory part) (wrapped over union)3 Clamp (4x accessory part)4 Gas pipe5 Insulation for liquid pipe (accessory part)6 Liquid pipe1 2431 Torque wrench2 Spanner3 Piping union4 Flare nutR=0.4~0.845°±290°±2A1234 65