•
Example of Electrical Wiring
The following figure shows an example of electrical wiring around the
Switch Boxes.
NOTES:
1.
Do not apply excessive voltage to the communication cable DC5V (non-polarity) between the outdoor
unit and the
Switch Box
, between the
Switch Box
and the indoor unit or between
Switch Boxes.
2.
Use 2-Conductor shielded communication cable for the communication cable. (Do not use 3-Conductor
cable or over.)
3.
Connect the communication cable for the outdoor unit to terminals “1” and “2” on TB2 in the
Switch Box.
4.
Connect the communication cable for the indoor unit exclusively for cooling operation to the terminal “1”
and “2” on TB2 in the
Switch Box.
5.
For a
Switch Box
in the same refrigerant cycle, an electrical power supply can be supplied by one main
switch.
6.
Do not connect the power supply line (220-240V) to the terminal block for transmission line.
7.
Connect the ground wiring for the outdoor/indoor units and
Switch Box
. When ground resistance is less
than 100 ohms, ground wiring work should be performed by the qualified electrician.
8.
Do not run the communication cables along with power supply wirings in the
Switch Box.
Separate communication cables from the power supply wirings.
23
B A 2 1
Heating Only Water Module
Outdoor
1 2
TB2
TB2
TB2
TB2
TB2
TB2
TB2
TB1
B A 2 1
Indoor Unit A
Power Supply Wiring
Outdoor Unit
Power Supply
1~ 220-240V/50Hz
1~ 220V/60Hz
B A 2 1
Indoor Unit B
B A 2
1
Indoor Unit
P
1
B A 2 1
Indoor Unit
P
2
B A 2 1
Cooling Only Indoor Unit
Switch
Box
Connect communication
cable from cooling only
indoor unit to the outdoor
terminal block (TB2) in
Switch
Box
.
Communication Cable
Outdoor Unit
3
2
O.U.-O.U.
4
1
HCHM-N04X
TB3
TB4
PCB1
Indoor
3
5
4
6 7 8 9 10
A
B
C
D
Indoor
TB3
TB4
PCB2
Indoor
3
5
4
6
8 9
7
10
E
F
G
H
Indoor
TB3
TB4
PCB3
Indoor
3
5
4
6 7 8 9 10
I
J
K
L
Indoor
Outdoor
1 2
TB2
TB3
TB4
PCB1
Indoor
A
B
C
3
5
4
6
8
7
Indoor
Switch
Box
A to L indicate the Indoor Unit number.
WC
WC
WC
WC
WC
HCHM-N08X
HCHM-N12X
When multiple indoor units are connected to the same
Switch
Box
the operation mode (cooling/heating) for the indoor units will be the same.
WC: Wired Controller
(Non-Polarity)
(DC5V)
Communication Cable
(Non-Polarity)
(DC5V)
Connect
communication cable
from outdoor unit
to the outdoor
terminal block (TB2)
in
Switch
Box
.
ELB
S
Earth
Leakage
Breaker
Main Switch
and Fuse
Power
Supply
R/
L1
S/
L2
TB3
TB4
PCB4
Indoor
3
5
4
6 7 8 9 10
M
N
O
P
Indoor
HCHM-N16X
WC
TB2
or Water Module A
or Water Module B
Summary of Contents for HCHM-N04X
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