17
[ PRECAUTIONS ]
1.
Use round crimp-style terminals for connecting wires to the power supply terminal block.
(Refer to Fig. 23)
If unavailable, observe the following points when wiring.
•
Do not connect wires of different gauge to the same power supply terminal.
(Looseness in the connection may cause overheating.)
•
Use the specified electric wire. Connect the wire securely to the terminal. Lock the wire down without
applying excessive force to the terminal. (Tightening torque: 0.97ft.lbf ±10 %)
2. Tightening torque for the terminal screws.
•
Use the correct screwdriver for tightening the terminal screws. If the blade of screwdriver is too small, the
head of the screw might be damaged, and the screw will not be properly tightened.
•
If the terminal screws are tightened too hard, screws might be damaged.
•
Refer to the table below for the tightening torque of the terminal screws.
3.
Do not connect wires of different gauge to the same ground terminal. Looseness in the connection may
lessen protection.
4.
Keep transmission wiring at least 5” away from power supply wiring. The equipment may malfunction if
subjected to electrical (external) noise.
5.
For remote controller wiring, refer to the “INSTALLATION MANUAL OF REMOTE CONTROLLER”
attached to the remote controller.
8-2 WIRING EXAMPLE
•
Fit the power supply wiring of each unit with a switch and fuse as shown in the drawing.
COMPLETE SYSTEM EXAMPLE (3 systems)
Terminal
Size
Tightening torque
(ft-lbf)
Remote controller, Transmission wiring and
Forced off terminal block (6P)
M3.5
0.58 – 0.72
Power supply and Ground terminal block (3P)
M4
0.87 – 1.06
Electric wire
Round crimp-style terminal
Attach insulation sleeve
Fig. 23
Power supply wiring
Transmission and remote controller wiring
Switch
Fuse
Fig. 24
Power supply
Main
switch
Remote controller
Indoor unit
Outdoor unit
BS unit
(Only for Heat
recovery system)
01_EN_3PN07521-1.fm Page 17 Monday, June 19, 2006 5:05 PM
