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7.3. Connecting LEV-kit and thermistor ca-
bles
7.3.1 Connecting LEV-kit cables
Connect the lead wire of the linear expansion valve to the controller.
Pull the end of wire (ring terminal) through the bunch of wires (LEV-kit) at the
bottom of the controller.
Connect the lead wire of the expansion valve to the same colored terminal.
When the lead wire is too long, cut it to the appropriate length. Do not bind it in the
box.
This time, connect the lead wire to the same colored terminal.
7.3.2 Connecting thermistor cables
Pull the end of the wire through the bunch of wires (Thermistor) at the bottom of
the controller.
Connect the thermistor for the inlet air to T1 and T2 on the terminal block, the
thermistor on the gas side to T11 and T12, the thermistor on the liquid side to T21
and T22.
When the lead wire is too long, cut it to the appropriate length. Do not bind it in the
box.
Take proper measures not to miswire. E.g. Attach a label before the cutting part, so
that it is obvious whether the wire is for inlet air, for gas side or for liquid side.
Caution:
Do not route the thermistor cables together with power cables.
7.4. Connecting distant signal line
Pull the wires for operation command (pulse maneuvering), for operation signal
and for error signal through the bunch of wires (Distant signal) at the bottom of the
controller.
Connect each wire to operation command: A1 and A2, to operation signal: D1 and
D2, and to error signal: D11 and D12.
Item
Connection circuit (on-site circuit)
Operation
A1
command
A2
Maximum 10 m
A1
A2
Maximum 10 m
Relay power
source
SW2
Operation signal
D1
D2
Error signal
D11
D12
SW1
SW1: Minimum applica-
ble load
DC12 V, 1 mA
X
X: Minimum applicable
load
DC12 V, 1 mA
X
L1: Operation display lamp
Display power source:
L1
DC30 V, 1 A
AC100 V/200 V, 1 A
L2: Error display lamp
Display power source:
L2
DC30 V, 1 A
AC100 V/200 V, 1 A
Notes:
•
After connecting each wire to the terminal, tighten each nut tightly through
which the wire runs.
•
Check that the bunch of wires do not come off even if they are pulled
strongly.
Caution:
•
After the wiring work is completed, mount the inner cover first and then
the outer cover.
•
Tighten the screws tightly. (If not, drop of water may enter, leading to
malfunction.)
•
Operation signal cables and Error signal cables and Operation command
cables must be routed in a distance of at least 20 cm from all other ca-
bles.
•
When Operation signal, Error signal and Distant signal are taken out,
remove the plug inside the bunch of wires.
•
Wind the supplied tube around the wire according to the size and number
of the wire.
•
If the wire comes off the tightly tightened bunch of wires, wind the insu-
lation tape around the wire to make the wire thicker.
[Fig. 7.2.5] (P.5)
A Bunch of wires
B Plug
C Tube
D Insulation tape
11
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