Daikin LREQ5B7Y1 Installation Manual

Also see for LREQ10B7Y1: Installation manual Operation manual

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Daikin LREQ5B7Y1 Installation Manual Manual pdf 13 page image

LREQ5~20B7Y1Air cooled refrigeration condensing unit4PW74302-1 – 2012.06Installation manual10When connected at lateral side (bottom)Remove the knock hole on the bottom frame and route the pipingunder the bottom frame.CAUTION• Check that the on-site piping does not come in contact with otherpiping, the bottom frame, or side plate of the product.Precautions for PipingPerform piping branching with the following conditions kept in mind.• At the time of branching the liquid piping, use a T-joint or Y-jointand branch it horizontally. This will prevent an uneven flow ofrefrigerant.• At the time of branching gas piping, use a T-joint and branch it sothat the branched piping will be located above the main piping (seethe illustration below). This will prevent the stay of refrigerant oil inthe indoor unit not in operation.• Use a Y-joint for the liquid refrigerant branch and have the pipingbranch horizontally.• Use a T-joint for the gas refrigerant branch and connect from thetop of the main piping.• Make sure that the horizontal portion of the gas piping slantsdownward to the outdoor unit (see the illustration above).• If the outdoor unit is located above, make a trap on the gas pipe at5 m intervals from outdoor unit. This will ensure the smoothreturning of oil in the piping slanting upward.7. FIELD WIRINGTo electric engineering contractors• Be sure to install an earth leakage breaker. The productincorporates inverter equipment. In order to prevent themalfunctioning of the earth leakage breaker, make sure that theearth leakage breaker withstands harmonic interference.• Do not operate the condensing unit until refrigerant piping work iscompleted, or otherwise the compressor will malfunction.• Do not remove any electrical components such as thermistors orsensors when connecting power supply wires or transmissionwires. The compressor may malfunction if the condensing unit isoperated with such electrical components removed.CAUTION• All field wiring and components must be installed by a licensedelectrician and must comply with relevant local and nationalregulations.• Be sure to use a dedicated power circuit. Never use a power supplyshared by another appliance.• Never install a phase advancing capacitor. As this unit is equippedwith an inverter, installing a phase advancing capacitor will not onlydeteriorate power factor improvement effect, but also may causecapacitor abnormal heating accident due to high-frequency waves.• Only proceed with wiring work after blocking off all power.• Always ground wires in accordance with relevant local and nationalregulations.• This machine includes an inverter device. Connect earth and leavecharge to eliminate the impact on other devices by reducing noisegenerated from the inverter device and to prevent leaked currentfrom being charged in the outer hull of the product.• Do not connect the ground wire to gas pipes, sewage pipes,lightning rods, or telephone ground wires.Gas pipes: can explode or catch fire if there is a gas leak.Sewage pipes: no grounding effect is possible if hard plasticpiping is used.Telephone ground wires and lightning rods: dangerous whenstruck by lightning due to abnormal rise in electrical potential in thegrounding.• Be sure to install an earth leakage circuit breaker.This unit uses an inverter, so install the earth leakage circuitbreaker that be capable of handling high harmonics in order toprevent malfunctioning of the earth leakage circuit breaker itself.• Earth leakage circuit breaker which are especially for protectingground-faults should be used in conjunction with main switch orfuse for use with wiring.• Electrical wiring must be done in accordance with the wiringdiagrams and the description herein.• Do not operate until refrigerant piping work is completed.(If operated before complete the piping work, the compressor maybe broken down.)• Never remove thermistor, sensor or etc. when connecting powerwiring and transmission wiring.(If operated with thermistor, sensor or etc. removed, thecompressor may be broken down.)Liquid side shutoff valveGas side shutoff valveGas sideaccessory pipe (1)Gas sideaccessory pipe (2)BrazingBrazingLiquid side(field supply)Gas side(field supply)Liquid sideaccessory pipe (1)Liquid sideaccessory pipe (2)Knockout holeBrazingBrazingPunch the knock hole.LREQ5~12Liquid sideshutoff valveGas sideshutoff valveGas sideaccessory pipe (2)Gas sideaccessory pipe (1)BrazingBrazingLiquid side(field supply)Gas side(field supply)Liquid sideaccessory pipe (2)Liquid sideaccessory pipe (1)Knockout holePunch the knock hole.BrazingBrazingLREQ15, LREQ20Horizontalsurface ±30° or lessA-arrow viewAY-jointT-jointMain pipingIndoor unit sideOutdoor unit sideBranch pipingMake the pipingslant downwardBranch pipingMake the pipingslant downwardMain pipingMake the pipingslant downwardT-joint