Electrical Wiring - Hitachi CH-Box Installation Manual

6.3 Electrical Wiring
The electrical wiring connection for the CH-Box is shown in Figure 6.1.
(1) Turn OFF the main power switch and take off the electrical box cover of CH-Box.
(2) Connect the power supply wiring to L1 and L2 on the terminal block TB1, and connect ground wiring to
the terminals in the electrical box.
(3) Connect the communication cable between the outdoor unit and CH-Box to TB2 of the CH-Box.
Connect the communication cable between the CH-Box and indoor unit to TB3 and TB4 of the
CH-Box.
Ensure that the communication cable between the CH-Box and indoor unit is connected to the same
letter as piping connection. (Tightening Torque: 1.0 to 1.3 N . m (0.7 to 1.0 ft . lbs))
Refer to "Example of Electrical Wiring" for the wiring connection.
(4) Tightly clamp the wires using the cable clamp inside the electrical box.
(5) Make sure the communication cables outside the electrical box does not touch sharp edges by
securing with clamp (accessory (7)).
(6) Attach the electrical box cover after completing the wiring work.
Ground Terminal
Terminal Block
for Power Supply
Wire Clip
(Use to
route wiring)
Cable Clamp
TB1 Terminal Block for Power Supply Cable
TB2 Terminal Block for Communication Cable
TB3, TB4 Terminal Block for Communication Cable
Above figure illustrate the example of CH-AP12MSSX.
Number of PCBs are different depending on model number.
Refer to the following table.
CH-AP06MSSX
CH-AP08MSSX
CH-AP12MSSX
CH-AP16MSSX
NOTE:
The accessory numbers are listed in Table 4.1.
P5417025-rev.1
PCN1 PCN2
TB1 PCB1
LED10
LED11
LED12
LED13
LED14
LED4 LED5 LED6 LED7
LED15
TP DSW1 DSW2 DSW3
ON ON ON
LED16
1 2 3 4 5 6 1 2 3 4 1 2
TB2
CN11
LED17
ON ON ON
1 2 1 2 1 2
CN12
ON
1 2
TB3 TB4
CN9 CN10
CN7 CN8
1 2 3 4
A B C D
Communication Cable
Communication cable between
the outdoor unit and CH-Box.
Power Supply Wiring Connection
(φ26mm [1 inch])
PCB1 PCB2
Figure 6.1 Electrical Wiring Connection
Terminal Blocks for Communication
between CH-Box and Indoor Unit
PCN1 PCN2
PCB2
LED10
LED11
LED12
LED13
LED14
LED4 LED5 LED6 LED7
LED15
TP DSW1 DSW2 DSW3
ON ON ON
LED16
1 2 3 4 5 6 1 2 3 4 1 2
CN11
LED17
ON ON ON ON
1 2 1 2 1 2 1 2
CN12
ON
1 2
TB3 TB4
CN9 CN10
CN7 CN8
1 2 3
E F G H
Cable Clamp
Clamp
(Accessory (7))
Screw Size
M3.5
PCB3 PCB4
PCN1 PCN2
PCB3
LED10
LED11
LED12
LED13
LED14
LED4 LED5 LED6 LED7
LED15
TP DSW1 DSW2 DSW3
ON ON ON
LED16
1 2 3 4 5 6 1 2 3 4 1 2
CN11
LED17
ON ON ON
1 2 1 2 1 2
CN12
ON
1 2
TB3 TB4
CN9 CN10
CN7 CN8
4 1 2 3
I J K
Cable Clamp
Clamp
(Accessory (7))
Control Wiring Connection
(3 x φ26mm [1 inch])
Tightening Torque
M4 1.0 ~ 1.3 N.m
0.7 ~ 0.9 N.m
M4 1.0 ~ 1.3 N.m
ON ON
1 2 1 2
4
L
Cable Clamp
Clamp
(Accessory (7))
23