Daikin RWEYQ72 Engineeiring Data

Installation EDUS30-900-N38 Installation of Outdoor Units8-3 General• Make sure to connect the power source wire to the power sourceterminal block and to clamp it as shown in figure 8, chapter “Fieldline connection”.• As this unit is equipped with an inverter, installing a phase advanc-ing capacitor will not only reduce the power factor improvementeffect, but also may cause the capacitor to overheat due to high-frequency waves. Therefore, never install a phase advancingcapacitor.• Keep power imbalance within 2% of the supply rating.1. Large imbalance will shorten the life of the smoothing capaci-tor.2. As a protective measure, the product will stop operating and anerror indication will be made, when power imbalance exceeds4% of the supply rating.• Follow the “electrical wiring diagram” when carrying out any elec-trical wiring.• Only proceed with wiring work after blockingshutting off all power.• Always ground wires. (In accordance with national regulations ofthe pertinent country.)• This unit uses an inverter, and therefore generates noise, whichwill have to be reduced to avoid interfering with other devices. Theouter casing of the product may take on an electrical charge due toleaked electrical current, which will have to be discharged with thegrounding.• This unit has a negative phase protection circuit. (If it operates,only operate the unit after correcting the wiring.)WARNING• Do not ground units to gas pipes, sewage pipes, lightning rods,or telephone ground wires because incomplete grounding couldcause a severe shock hazard resulting in severe injury or death.Gas pipes: can explode or catch fire if there is a gas leak.Sewage pipes: no grounding effect is possible if hard plastic pip-ing is used.Telephone ground wires and lightning rods: dangerous whenstruck by lightning due to abnormal rise in electrical potential inthe grounding.8-4 ExamplesSystem example (Refer to figure 8)1. Field power supply2. Main switch3. Disconnect switch4. Maximum Overcurrent Protection5. Ground fault circuit interrupter6. Remote controller7. Outside unit8. BS unit9. Indoor unit10. Cool / heat selectorpower supply wiring (sheathed cable)transmission wiring (sheathed cable)CAUTION• Use a power wire pipe for the power wiring.• Outside the unit, make sure the low-voltage electric wiring (i.e. forthe remote controller, tarnsmission, etc.) and the high-voltageelectric wiring do not pass near each other, keeping them at least5 in. apart. Proximity may cause electrical interference, malfunc-tions, and breakage.• Be sure to connect the power wiring to the power wiring terminalblock and secure it as described in Field line connection.• Transmission wiring should be secured as described in Field lineconnection.• Secure the wiring with the accessory clamps so that it does nottouch the piping.• Make sure the wiring and the electrical components box lid do notstick up above the structure, and close the cover firmly.WARNING• Never connect power supply wiring to the terminal block for remotecontroller wiring as this could damage the entire system.Picking power line and transmission line(Refer to figure 9)1. Power supply wiring and wiring for pump operation(High voltage)2. Connection wiring(Low voltage)3. Set apartConnect the wire to the terminal block on PC board with caresince too much pressure may cause breakage of the PC board.Field line connection: transmission wiring, interlock circuit,pump operation output and COOL/HEAT selectorPower and transmission line: Connect it using conduit mountingplates.[In case of single outside unit](Refer to figure 10)1. COOL/HEAT selector2. Outside unit PC board (A1P)3. Take care of the polarity4. Use the conductor of sheathed wire (2 wire)(no polarity)5. Terminal board (field supply)6. Indoor unit7. Never connect the power wire.8. BS unit A9. BS unit B10. Last BS unit11. Cool-only unit[In case of multiple outside units](Refer to figure 11)1. Unit A (Master unit)2. Unit B3. Unit C4. TO IN/D UNIT5. TO OUT/D UNIT6. TO MULTI UNIT7. To COOL/HEAT selector (only Heat pump system)8. To indoor unit9. To other systems• The transmission wiring between the outside units in the samepipe line must be connected to the Q1/Q2 (Out Multi) terminals.Connecting the wires to the (Out-Out) terminals results in systemmalfunction.• The wiring for the other lines must be connected to the F1/F2 (Out-Out) terminals of the PC board in the outside unit to which thetransmission wiring for the indoor units is connected.• The outside unit to which the transmission wiring for the indoorunits is connected is master unit.• The transmission wiring between the outside units must be 100 ft.in length at maximum.NOTE• Be sure to keep the power line and transmission line apart fromeach other.Be careful about polarity of the transmission line.Make sure that the transmission line is clamped as shown in thefigure in chapter “Field line connection”.Check that wiring lines do not make contact with refrigerant piping.Firmly close the lid and arrange the electric wires so as to preventthe lid or other parts from coming loose.Top plateConduit(field supply)Lock nut(field supply)Conduitmountingplate(accessory)Top plate