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0# electric
control box
"ON/OFF" port
Fig. 8-14 Wiring of "ON/OFF " weak electric port
8.5.10 Wiring of "HEAT/COOL" weak electric port
The remote function of "HEAT/COOL" must be set by DIP switch
.The remote function
"HEAT/COOL" is effective when S5-3 is
chosen ON, at the same time, the wire controller is out of control.
Corresponding parallel connect the "HEAT/COOL" port of the
main unit's electric control box,then, connect the "ON/OFF" signal
(provide by user) to the "HEAT/COOL" port of main unit as
follows.
Wiring method: Shorting the terminal block XT2 at 14 and 23
inside the electric control box to enable the remote function of
"HEAT/COOL".
0# electric
control box
"HEAT/COOL" port
Fig. 8-15 Wiring of "HEAT/ COOL" weak electric port
8.5.11 Wiring of "ALARM" port
Connect the device provided by user to the "ALARM" ports of the
module units as follows.
electric control box
"ALARM" port
Fig. 8-16 Wiring of "ALARM" port
If the unit is operating unnormally,the ALARM port is closed,
otherwise,the ALARM port is open.
The ALARM ports are on the main control board. See the wiring
diagram for details.
0# electric
8.5.12 Control system and installation precautions
control box
"ON/OFF" port
a. Use only shielded wires as control wires. Any other type of wires
may produce a signal interference that will cause the units to
malfunction.
Fig. 8-17-1 Control system and installation precaution (a)
b. The shielding nets at both ends of the shielded wire must be
grounded. Alternatively, the shielding nets of all shielded wires
are interconnected and then connected to earth through or one
`metal plate.
0# electric
control box
"HEAT/COOL" port
Fig. 8-17-2 Control system and installation precaution (b)
c. Do not bind the control wire, refrigerant piping and power cord
together. When the power cord and control wire are laid parallel,
they should be kept at a distance of more than 300 mm to prevent
signal source interference.
Fig. 8-17-3 Control system and installation precaution (c)
d. Pay attention to the polarity of the control wire when conducting wiring
operations.
Fig. 8-17-4 Control system and installation precaution (d)
21
Uint
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