23
Power (DC 12V)
Main control board is provided
ON
OFF
Power (DC 12V)
Main control board is provided
0# electric
control box
“ON/OFF” port
0# electric
control box
“ON/OFF” port
Fig. 8-16-1 Wiring of “ON/OFF ” weak electric port
8.4.10 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”.
Power (DC 12V)
Main control board is provided
HEA
T
COOL
Power (DC 12V)
Main control board is provided
0# electric
control box
“HEAT/COOL” port
0# electric
control box
“HEAT/COOL” port
Fig. 8-16-2 Wiring of “HEAT/ COOL” weak electric port
8.4.11 Wiring of “TEMP-SWITCH” weak electric
port
The function of “TEMP-SWITCH” must be set by wired controller
for two setting water temperature. For cooling and heating mode.
Wiring method: Shorting the terminal block XT2 at 20 and
25 inside the electric control box to chose the target water
temperature
Power (DC 12V)
Main control board is provided
Power (DC 12V)
Main control board is provided
0# electric
control box
“TEMP-SWITCH” port
0# electric
control box
“TEMP-SWITCH” port
First target water temperature Second target water temperature
Fig. 8-17 Wiring of “TEMP-SWITCH” weak electric port
Device provided
by user
electric control box
“ALARM” port
Fig. 8-18 Wiring of “ALARM” port
8.4.12 Wiring of “ALARM” port
Connect the device provided by user to the “ALARM” ports of the
module units as follows.
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.
8.4.13 Control system and installation precautions
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. 8-19-1 Control system and installation precaution (a)
Fig. 8-19-2 Control system and installation precaution (b)
Fig. 8-19-3 Control system and installation precaution (c)
Fig. 8-19-4 Control system and installation precaution (d)
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.
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.
d. Pay attention to the polarity of the control wire when conducting wiring
operations.
Uint
Uint
Summary of Contents for KEM-90
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