Initial Setting - Daikin VRV IV Series Installation Manual

NOTE
• Use ring-type crimp style terminal for connections to
the power terminal block. (Refer to Fig. 6.)
Also, insulate the crimped area by attaching an
insula tion sleeve, etc.
• Use an appropriate screwdriver for tightening the
ter minal screw.
Using a screwdriver that is too small could damage
the screw head and prevent proper tightening.
• Over tightening the terminal screw could damage the
screw.
Refer to the Table 7 for the terminal screw tightening
torque.
• When fastening the wire, use the included clamp 2)
so as not to apply tensile force to the wire
connection and then securely fasten the wire. Also,
after wiring is com pleted, organize the wiring so that
the control box cover does not pop up and then properly replace the con trol 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 of
the 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 a
malfunction 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 SETTING

WARNING
Electric 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 as
required.
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 to
the Branch Selector unit.
NOTE
This 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.
13
Table 7
Terminal screw size
M3.5 (COOL/HEAT SELECTOR/transmission
wiring terminal block (A1P))
M4 (Power supply terminal block)
M4 (Ground terminal)
Turn on DS1-1.
Insulation sleeve
Ring-type crimp
style terminal
Fig. 6
3P405106-10 English
Electric wire
Tightening torque
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)