Daikin FHC20JEVLK Installation Manual

Contents

Daikin FHC20JEVLK Installation Manual Manual pdf 23 page image

1-21EnglishOPTIONAL FUNCTIONSShort Duct SpeciÀcationThe indoor unit is provided with air discharge and air intake “knock-out” hole for duct connection. However the connectionof the short duct for air discharge is possible on only one side.The use of short duct for air discharge will improve airflow distribution if there is an obstruction (such as a lighting fixture)or in a long, narrow room or an L-shaped room. It also use for air conditioning of two rooms simultaneously.••Possible Direction For Air Discharge And Air Intake Possible Opening Dimension For Duct ConnectionNOTEAvoid using the short duct on which the air discharge grille can be completely closed, to prevent evaporatorfreezing.In order to prevent condensation forming, be sure that there is sufficient thermal insulation and no leakage of cool airwhen installing the short duct.Keep the introduction of fresh air intake within 20% of total air Áow. Also provide a chamber and use a booster fan.•••Sealing MaterialIt is possible to seal one of the four air discharge outlet. (sealing two or more air discharge outlet could cause amalfunction)Remove the front panel and insert the sealing material into the air discharge outlet on the indoor unit to seal the airoutlet.The sealing material is the same length as the longer air discharge outlet. If it is desired to seal the shorter air dischargeoutlet, cut the sealing material to shorten it.Push the sealing material in about 10mm beyond the bottom surface of the indoor unit so that it does not touch the airlouver. Be sure not to push the sealing material in any farther than about 10mm.••••There are many ways of charging liquid in a “controlled manner” into thesuction side:-Use valve A on the manifold gauge setUse the valve on the refrigerant cylinderCharge through a Shredder valveUse a hose with a Shredder valve depressorCharge into the suction side at some distance from the compressorAll of the above1.2.3.4.5.6.Charging procedures – Three phase compressorsThe fundamental procedure is the same as for single phase models but the compressor can run in the wrong direction onstarting.If this happens reverse any two phases and start again. Short term reverse rotation will not damage the compressor.All Specter compressors have internal discharge temperature protectors which are very effective in preventing dangerouslyhigh discharge temperatures during charging. The protection module will trip and lock the compressor out for 30 minutes.It is not normally necessary to wait 30 minutes for the module to reset. When the compressor has cooled down the modulecan be reset by breaking the power supply to the control circuit. Very often the serviceman does not understand why themodule tripped and uses a jumper wire to bypass it. He continues to charge the system and removes the jumper whencharging is complete. The compressor may or may not run with the protector back in the circuit but it is certain that thecompressor has been damaged and premature failure is inevitable.2.Air DischargeAir DischargeAir Discharge Air DischargeAir Intake Air Discharge Knock Out Hole Air Intake KnockOut Hole10 50 50 50 50 50 1020702090 Ø100PCD Ø140115 20 115A