Hitachi CH-Box - Page 32

For Mexic
o
model onl
y.
Outdoor
12
TB2
TB2 TB2 TB2 TB2
TB2
TB2
TB1
1A2B
Indoor Unit A
Power Supply Wiring
Outdoor Unit
Power Supply
1~/N 230V/50Hz
1~/N
220-240V/50Hz
1~/N 220V/60Hz
1A2B
Indoor Unit B
1A2B
Indoor Unit L 1
1A2B
Indoor Unit L 2
When multiple indoor units are connected to the same branch of CH-Box,
the operation mode (cooling/heating) for the indoor units will be the same.
1A2B
Cooling Only Indoor Unit
CH-Box
Connect communication
cable from cooling only
indoor unit to the outdoor
terminal block (TB2) in
CH-Box.
Communication Cable
Outdoor Unit
32
O.U.-O.U.
41
H-LINK
CH-AP04MSSX
TB3 TB4
PCB1
Indoor
4653 78910
AB CD
Indoor
TB3 TB4
PCB2
Indoor
4653 78910
EF GH
Indoor
TB3 TB4
PCB3
Indoor
465378910
IJKL
Indoor
Outdoor
12
TB2
TB3 TB4
PCB1
Indoor
465378
AB C
Indoor
CH-Box
A to L indicate the Indoor Unit number.
WC
WC
WCWC
WC
CH-AP08MSSX
CH-AP12MSSX
WC: Wired Controller
(Non-Polarity)
(DC5V)
Communication Cable
(Non-Polarity)
(DC5V)
Connect
communication cable
from outdoor unit
to the outdoor
terminal block (TB2)
in CH-Box.
ELB
S
Earth
Leakage
Breaker
Main Switch
and Fuse
Power
Supply
R/
L1
S/
L2
TB3 TB4
PCB4
Indoor
465378910
MN OP
Indoor
CH-AP16MSSX
5
3
3
2
1
4
1~, 208-230V/50Hz
1~, 220V/60Hz
22
P5417025-rev.1
• ExampleofElectricalWiring
 ThefollowinggureshowsanexampleofelectricalwiringaroundtheCH-Boxes.
NOTES:
1. DonotapplyexcessivevoltagetothecommunicationcableDC5V(non-polarity)betweentheoutdoor
unitandtheCH-Box,betweentheCH-BoxandtheindoorunitorbetweenCH-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CH-Box.
4. Connectthecommunicationcablefortheindoorunitexclusivelyforcoolingoperationtotheterminal“1”
and“2”onTB2intheCH-Box.
5. ForaCH-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/220V/230V)totheterminalblockfortransmissionline.
7. Connectthegroundwiringfortheoutdoor/indoorunitsandCH-Box.Whengroundresistanceisless
than100ohms,groundwiringworkshouldbeperformedbythequaliedelectrician.
8. DonotrunthecommunicationcablesalongwithpowersupplywiringsintheCH-Box.
Separatecommunicationcablesfromthepowersupplywirings.