25
8.4.13 Control system and installation precautions
0# electric
control box
“HEAT/COOL” port
COOL
Power (DC 12V) Main control board is provided
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
S1-1or 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:
For
KEM-75 DRS5 KH
and
KEM-140 DRS5 KH
:Shorting the
terminal block CN138 at slave board inside the electric control
box to enable the remote function of “HEAT/COOL”.
For
KEM-90 DRS5 KH
and
KEM-180 DRS5 KH
: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
HEA
T
Power (DC 12V) Main control board is provided
8.4.12 Wiring of “ALARM” port
electric control box
“ALARM” port
Device provided by user
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.
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.
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.
Fig. 8-21-2 Wiring of “HEAT/ COOL” weak electric port
Fig. 8-23 Wiring of “ALARM” port
Uint
Uint
Fig. 8-24-1 Control system and installation precaution (a)
Fig. 8-24-2 Control system and installation precaution (b)
Fig. 8-24-3 Control system and installation precaution (c)
Fig. 8-24-4 Control system and installation precaution (d)
0# electric
control box
“TEMP-SWITCH” port
Power (DC 12V) Main control board is provided
0# electric
control box
“TEMP-SWITCH” port
First target water temperature
Power (DC 12V) Main control board is provided
Second target water temperature
Fig. 8-22 Wiring of “TEMP-SWITCH” 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:
For
KEM-75 DRS5 KH
andMC-SU140M-RN8L-B: Shorting the
terminal block CN110 at slave board inside the electric control
box to chose the target water temperature
For
KEM-90 DRS5 KH
and
KEM-180 DRS5 KH
: Shorting the
terminal block XT2 at 20 and 25 inside the electric control box to
chose the target water temperature
