Hitachi RCIM-2.0FSN - 13.3.3. H-LINK SYSTEM; H-LINK System Overview and Specifications; H-LINK Dip Switch Setting

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ELECTRICAL WIRING
13.3.3. H-LINK SYSTEM
 NOTE:
The H-LINK system can not be applied to the cycle
with the old model unit or the unit with old
transmission
1. Application
The new H-LINK wiring system requires only two
transmission wires connecting each indoor unit and
outdoor unit for up to 16 refrigerant cycles, and
connecting wires for all indoor units and all outdoor units
in series.
This H-LINK system can be applied to the following
models.
Indoor Unit Outdoor Unit
RCI-{{{ FSN1E
RCIM-{{{ FSN
RCD-{{{ FSN
RPC-{{{ FSNE
RPI-{{{ FSN1E
RPK-{{{ FSN(1)(2)M
RPF-{{{ FSNE
RPFI-{{{ FSNE
RAS-{{{HVRN1
2. Features
- The total wiring length is remarkably reduced.
- Only one connection is required for the wiring
between the indoor unit and outdoor unit.
- Easy wiring connection to the central controllers.
3. Specifications
- Transmission Wire: 2-Wire
- Polarity of Transmission Wire: Non-Polar Wire
- Maximum Outdoor Units To Be Connected: 16
Units per H-LINK system.
- Maximum Indoor Units To Be Connected: 3 Units
per cycle and 48 Units per H-LINK system
- Maximum Wiring Length: Total 1000m (including
CSNET WEB). In case that the total wiring length
is longer than 1000m, contact the Hitachi dealer.
- Recommended Cable: Twist Pair Cable with
Shield, over 0.75mm2 (Equivalent to KPEV-S)
- Voltage: DC5V
4. Example of H-LINK system
Using H-Link system only for Air Conditioners.
There are two typical cases of using H-LINK system:
(A) -Using H-LINK System only for Air Conditioners,
without control Device.
Examples:
 Line Connection with All units
 Line Connection for Each Floor
(B) -Using H-LINK System for Air Conditioners with Central
Control Device.
In case that H-LINK is not applied when electrical
wiring is performed.
 NOTE:
Do not make a wiring in a loop.
In the case that H-LINK is not applied after the when
electrical wiring is performed as shown above,
H-LINK is applied after the instrument wiring is
completed. Therefore, the dip switches are required
to be set according to Setting of Dip Switches on
PCB.
5. Dip Switch Setting of Indoor PCB and Outdoor PCB
It is required to set dip switches of every indoor unit and
outdoor unit.
Indoor Units
Outdoor Units
Indoor Units
Outdoor Units
Indoor
Units
Outdoor
Units
Do not make
wiring in a
loop