Daikin ERX125A7W1B Installation Manual

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Daikin ERX125A7W1B Installation Manual Manual pdf 11 page image

ERX125~250A7W1BInverter condensing unit4PW30064-1DInstallation manual7■ Vacuum drying: Use a vacuum pump which can evacuate to–100.7 kPa (5 Torr, –755 mm Hg)1. Evacuate the system from the liquid and gas pipes by using avacuum pump for more than 2 hours and bring the system to–100.7 kPa. After keeping the system under that condition formore than 1 hour, check if the vacuum gauge rises or not. If itrises, the system may either contain moisture inside or haveleaks.2. Following should be executed if there is a possibility of moistureremaining inside the pipe (if piping work is carried out during theraining season or over a long period of time, rainwater may enterthe pipe during work).After evacuating the system for 2 hours, pressurize the systemto 0.05 MPa (vacuum break) with nitrogen gas and evacuate thesystem again using the vacuum pump for 1 hour to –100.7 kPa(vacuum drying). If the system cannot be evacuated to–100.7 kPa within 2 hours, repeat the operation of vacuumbreak and vacuum drying.Then, after leaving the system in vacuum for 1 hour, confirm thatthe vacuum gauge does not rise.8. FIELD WIRING8.1. Internal wiring – Parts tableRefer to the wiring diagram sticker on the unit. The abbreviationsused are listed below:A1P~6P.................. Printed circuit boardBS1~5 .................... Push button switch (mode, set, return, test,reset)C1,C63,C66 ........... CapacitorDS1,DS2 ................ DIP switchE1HC,E2HC........... Crankcase heaterF1U ........................ Fuse (250 V, 8 A, B) (A4P)F1U,2U................... Fuse (250 V, 3.15 A, T) (A1P)F5U ........................ Field fuseF400U .................... Fuse (250 V, 6.3 A, T) (A2P)H1P~H8P............... Light emitting diode (service monitor - orange) (1)HAP........................ Pilot lamp (service monitor - green)K1........................... Magnetic relayK2........................... Magnetic contactor (M1C)K2M........................ Magnetic contactor (M2C)K1R ........................ Magnetic relay (K2M)K3R,K4R ................ Magnetic relay (Y1S, Y2S)K7R,K8R ................ Magnetic relay (E1HC, E2HC)L1R ........................ ReactorM1C,M2C............... Motor (compressor)M1F........................ Motor (fan)PS .......................... Switching power supply (A1P, A3P)Q1DI....................... Earth leakage breaker (field supply)Q1RP ..................... Phase reversal detection circuitR1T ........................ Thermistor (air) (A1P)R1T ........................ Thermistor (fin) (A3P)R2T ........................ Thermistor (suction)R4T ........................ Thermistor (coil-deicer)R5T ........................ Thermistor (coil-outlet)R6T ........................ Thermistor (liquid-pipe receiver)R10 ........................ Resistor (current sensor) (A4P)R31T,R32T............. Thermistor (discharge) (M1C, M2C)R50,59 ................... ResistorR95 ........................ Resistor (current limiting)S1NPH ................... Pressure sensor (high)S1NPL.................... Pressure sensor (low)S1PH,S2PH ........... Pressure switch (high)SD1 ........................ Safety devices inputT1A ........................ Current sensor (A6P)V1R ........................ Power module (A4P)V1R,V2R ................ Power module (A3P)X1A,X4A ................ Connector (M1F)X1M........................ Terminal strip (power supply)X1M........................ Terminal strip (control) (A1P)Y2E ........................ Expansion valve (electronic type) (subcool)Y1S ........................ Solenoid valve (hotgas bypass)Y2S ........................ Solenoid valve (oil return)Z1C~Z7C ............... Noise filter (ferrite core)Z1F......................... Noise filter (with surge absorber)L1,L2,L3 ................. LiveN ............................ Neutral............... Field wiring.................. Terminal strip.......................... ConnectorAll field wiring and components must be installed by alicensed electrician and must comply with relevant localand national regulations.The field wiring must be carried out in accordance with thewiring diagrams and the instructions given below.Be sure to use a dedicated power circuit. Never use apower supply shared by another appliance. This can leadto electric shock or fire.Be sure to install an earth leakage circuit breaker.(Because this unit uses an inverter, install an earthleakage circuit breaker that is capable of handling highharmonics in order to prevent malfunctioning of the earthleakage breaker itself.)Do not operate until refrigerant piping work is completed.(If operated before completion of the piping work, thecompressor may break down.)Never remove a thermistor, sensor, etc., when connectingpower wiring and transmission wiring.(If operated without thermistor, sensor, etc., thecompressor may break down.)This product's reversed phase protection detector onlyworks when the product started up.The reversed phase protection detector is designed to stopthe product in the event of an abnormalities when theproduct is started up.Replace two of the three phases (L1, L2, and L3) duringreverse-phase protection circuit operation.Reversed phase detection is not performed while theproduct is operating.If there exists the possibility of reversed phase after anmomentary black out and the power goes on and off whilethe product is operating, attach a reversed phaseprotection circuit locally. Running the product in reversedphase can break the compressor and other parts.Means for disconnection must be incorporated in the fieldwiring in accordance with the wiring rules.(An all-pole disconnection switch must be available on theunit.)(1) H2P: Prepare, test = Flashing, Malfunction detection = Light up