②
Table of selection of communication line diameter
Function
IDU and ODU communication
One controller
to one IDU
(Two controllers
to one IDU)
Communication
One-to-more
(centralized
controller)
Communication
Item
HyperLink
communication
(IDUs are powered
independently)
HyperLink
communication
(IDUs are powered
uniformly)
P/Q
communication
(IDUs are powered
uniformly)
P/Q/E
communication
(IDUs are
powered
uniformly)
X1X2
communication
D1D2
communication
Wire
diameter
2 × 1.5mm
2
Wire
resistance ≤
1.33Ω/100m
2 × 0.75mm
2
2 × 0.75mm
2
(shielded cable)
3 × 0.75mm
2
(shielded cable)
2 × 0.75mm
2
(shielded cable)
2 × 0.75mm
2
(shielded cable)
Length
≤ 600m
(add two
repeaters)
≤ 2000m
≤ 1200m
≤ 1200m
≤ 200m
≤ 1200m
Please select the communication line according to the requirements in the above reference table. Use
shielded cables for communication when strong magnetism or interference is present.
On-site wiring must comply with the relevant regulations of the local country/region and must be completed by
professionals.
Do not connect the communication line when the power is on.
Do not connect the power cable to the communication terminal; otherwise, the main control board may be
damaged.
The standard value of the screw torque of the communication line terminal is 0.5N·m. Insufficient torque may
cause poor contact; excessive torque may damage the screws and power supply terminals.
Both HyperLink communication and PQ communication are internal and external, so only one of the two can
be selected. Do not connect both HyperLink communication line and PQ communication line to the same
system, otherwise the IDU and ODU cannot communicate normally.
If some of the IDUs in the same refrigerant system are non-V8 series, only P/Q/E communication can be
selected for the IDU and ODU communication. The three-core shielded cable of 3×0.75mm
2
is required to
connect "P", "Q", and "E".
Do not bundle the communication line with the refrigerant pipeline, power cable, etc. When the power cable
and the communication line are laid in parallel, a distance of more than 5cm should be maintained to prevent
interference from the signal source.
When the construction personnel of the IDU and ODU are working separately, information communication and
synchronization are required. Do not connect the ODU to HyperLink and the IDU to PQ. Do not connect the
ODU to PQ and the IDU to HyperLink.
Bonding and connecting the communication line should be avoided, but if it is used, at the very least, ensure a
reliable connection by crimping or soldering and make sure the copper wire at the connection is not exposed;
otherwise, communication failure may occur.
Caution
35
Installation
Summary of Contents for KSEF-22 DN5.0
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