English
10
Field line connection:
L1, L2, L3, phase of the power supply wiring should be clamped to the
safety catch using the included clamp material.
The green and yellow striped wrapped wires should be used for ground-
ing.
Make sure to connect the power wire to the power terminal block and fix
it using attached clamp as shown in figure 15 and 19.
(Refer to figure 15)
1.
Power supply
(208-230V, Three-phase)
2.
Branch switch, overcurrent breaker
3.
Grounding wire
4.
Ground fault circuit interrupter
5.
Attach insulation sleeves.
6.
Power supply terminal block
7.
Grounding terminal
8.
Retain the ground wires along with the power wires using
the accessory clamp (A).
9.
Grounding wire
10.
When wiring, do not allow the ground wires to contact the
compressor lead wires. If the wires contact each other,
adverse effects may occur to other units.
11.
When connecting two wires to one terminal, ensure that the
crimp-style terminals face with each other back to back.
Moreover, make sure that the wire of the smaller gauge is
located above.
12.
Terminal block
13.
Crimp-style terminal
14.
Wire gauge: Small
15.
Wire gauge: Large
(Refer to figure 19)
1.
Intake for power supply wiring, pump operation output (high
voltage) and ground wiring.
2.
Stop valve for discharge gas (high temperature part)
3.
Insert the accessory clamp (B) in the hole of the fixing plate
for stop valve.
4.
Power supply wiring, pump operation output (high voltage)
and ground wiring.
5.
Retain the power supply wiring, pump operation output
(high voltage) and ground wiring with the accessory clamp
(B) to prevent them from touching with the stop valve for dis-
charge gas.
6.
Insert the accessory clamp (B) in the hole of the bottom of
electrical box.
7.
Intake for transmission wiring. (low voltage)
8.
Make sure to provide for a downward loop in the transmis-
sion wiring right in front of the location where the wiring is to
be fixed over the topplate of the switch box. This in order to
prevent that condensate drips off the wiring into the switch
box.
9.
Fix the transmission wiring to resin clamps with the acces-
sory clamps (A)
10.
Pass the transmission wiring (low voltage) through the wire
clip.
11.
Retain the power supply wiring, pump operation output
(high voltage) and ground wiring to the bottom of electrical
box with the accessory clamp (B)
WARNING
• Use only specified wire and connect wires to terminals tightly. Be
careful that wires do not place external stress on terminals. Keep
wires in neat order so as not to obstruct other equipment. Incom-
plete connections could result in overheating, and in worse cases,
electric shock or fire.
CAUTION
〈
Precautions when laying power wiring
〉
Use round pressure terminals for connections to the power terminal
block.
When none is available, follow the instructions below.
•
Do not connect wiring of different thicknesses to the power termi-
nal block. (Slack in the power wiring may cause abnormal heat.)
•
When connecting wiring which is the same thickness, do as
shown in the figure below.
•
For wiring, use the designated power wire and connect firmly,
then secure to prevent outside pressure being exerted on the ter-
minal board.
•
Use an appropriate screwdriver for tightening the terminal
screws. A screwdriver with a small head will strip the head and
make proper tightening impossible.
•
Over-tightening the terminal screws may break them.
•
See the table below for tightening torque for the terminal screws.
〈
Precautions when connecting the ground
〉
When pulling the ground wire out, wire it so that it comes through the
cut out section of the cup washer. (An improper ground connection
may prevent a good ground from being achieved.)
8-5 In case of a local setting
If necessary, do the local settings as mentioned in the table below. For
setting, refer to the plate “Cares to be taken in servicing” attached to the
cover of electrical components box.
Typical local settings
∗
For other settings than mentioned in the table below, refer to the
equipment design materials and service manual.
CAUTION
A separate adapter (sold separately as an accessory) for external
control of an outside unit is necessary when doing a demand oper-
ation from an external instruction, setting of cooling and heating
through a centralized remote controller for cooling and heating
(sold separately as an accessory) and setting of centralized inter-
lock. For details, refer to the manual attached to the adapter.
Tightening torque
(ft · lbf)
M5 (Power terminal block)
2.21-3.02
M5 (Ground)
M3 (Transmission wiring terminal block)
0.59-0.72
(1) Setting of switching between
cooling and heating
This setting is done when switching between cooling and
heating is performed by a switching remote controller (sold
separately as an accessory) installed on the outside unit.
(2) Setting to prohibit sequenced
start
This setting is done when the outside units are not started in
a sequenced order.
(3) Setting of centralized interlock
Setting of external demand
These settings are done when the interlocks are connected
in a lump-sum manner or when performing a demand opera-
tion by external instruction.
(4) Setting of abnormal display
when interlock contact is OFF
This setting is done when making an abnormal display (HJ)
on a remote controller when the interlock contact is OFF
(when the heat source water pump is not operated).
Power wire
Round pressure
terminal
Connect same-
thickness wiring
to both sides.
It is forbidden to
connect two to
one side.
It is forbidden to
connect wiring of
different thicknesses.
Round pressure terminal
Cup washer
Cut out section
