Daikin VRV IV Series Installation Manual

Contents

Daikin VRV IV Series Installation Manual Manual pdf 16 page image

3P405106-10 English13NOTE• Use ring-type crimp style terminal for connections tothe power terminal block. (Refer to Fig. 6.)Also, insulate the crimped area by attaching aninsulation sleeve, etc.• Use an appropriate screwdriver for tightening theterminal screw.Using a screwdriver that is too small could damagethe screw head and prevent proper tightening.• Over tightening the terminal screw could damage thescrew.Refer to the Table 7 for the terminal screw tighteningtorque.• When fastening the wire, use the included clamp 2)so as not to apply tensile force to the wireconnection and then securely fasten the wire. Also,after wiring is completed, organize the wiring so thatthe control box cover does not pop up and then properly replace the control box cover.Make sure no wires are pinched when replacing the control box cover.Always use the wire through hole to protect the wires.• Do not pass the transmission wiring and power supply wiring through the same locations and outside ofthe unit keep them separated by at least 2 in. (50 mm).Not doing so could cause the transmission wiring to pick up electric noise (external noise) and result in amalfunction or breakdown.• After the wiring working is complete, use sealer (field supply) to seal closed the wire through hole.(Entry by small animals, etc., could cause a malfunction.)7. INITIAL SETTINGWARNINGElectric shock hazard! Before performing work, be sure to disconnect any power source con-nected to the unit.• When the refrigerant piping and wire installation work is completed, make the following settings asrequired.1. Setting for when connecting the COOL/HEAT SELECTOR to the Branch Selector unit.〈Setting description〉Set the input signal from the COOL/HEAT SELECTOR (sold separately) to ON/OFF.〈Setting method〉Set the dip switches (DS1-1) on printed circuit board (A1P) as shown below before turning on the power tothe Branch Selector unit.Turn on DS1-1.NOTEThis setting is read by the microcomputer when the Branch Selector unit power is turned on.• Be sure to make the setting before turning on the power.• Always close the control box cover after making the setting.Terminal screw sizeM3.5 (COOL/HEAT SELECTOR/transmissionwiring terminal block (A1P))M4 (Power supply terminal block)M4 (Ground terminal)0.65±0.05 ft.lbf(0.88±0.08 N·m)0.97±0.09 ft.lbf(1.31±0.13 N·m)1.25±0.12 ft.lbf(1.69±0.17 N·m)Tightening torqueTable 7Insulation sleeveElectric wireRing-type crimpstyle terminalFig. 6

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