104
9-3. DESIGN FOR CONTROL WIRING
Please note that the types and numbers of control wires needed by the Mr. SLIM MULTI-S series will depend on the remote
controllers and whether they are linked with the system.
9-3-1. Selection number of control wires
9-3-3. Remote controller wiring
9-3-2. Control signal wires
9-3-4. Permissible length of control wiring
Use
Remote controller ➔ indoor unit
Wires connecting ➔ indoor units
Wires connecting ➔ indoor units with outdoor units
Wires connecting ➔ outdoor units
2 wires (non-polar)
M-NET remote controller
Remote controller used in system control operations.
• Group operation involving different refrigerant systems.
• Linked operation with upper control system.
Transmission
wires
System
Transmission wire length
Examples of suitable
environments
(determined according
to amount of noise)
Type of transmission wire
● Transmission wires
• Types of transmission wires: Design feeder control wires using the information in the following table.
• Diameter of wire size: 1.25E
Noise-free environment
such as residence or
free-standing store
VCTF, VCTFK, CVV,
CVS, VVR, VVF, VCT
Clinics, hospitals, communications facilities,
or office high-rises typically containing
noise-producing equipment such as frequency
modulation devices, electrical generators,
high-frequency medical apparatus, and
wireless communication apparatus, etc.
All places
120m or less
Suitable for single refrigerant system
120m or longer
regardless of length
Multiple refrigerant system
Shielded wire CVVS,CPEVS
If the transmission distance is too long or if there is a source of noise close to an air conditioning unit, the noise problem can
be avoided by using shielded wire or moving the unit away from the source.
• The length of wire is 120m or longer.
• Air conditioning units used in hospitals, communications facilities, or office high-rises containing noise-producing equipment
such as frequency modulation devices, electrical generators, high-frequency medical apparatus, and wireless communication
apparatus.
Type
Wire cross section area
Length
Non-shielded wire may be used for 10m or less; shielded wire must be used if distance is greater than 10m (note 2)
0.5-0.75mm
2
or greater
Make sure that the greatest transmission distance is less than 200m. (shielded wire cross section area at least 1.25mm
2
)
M-NET remote controller
• Maximum extension length of wiring
(L
1+L2+L3+L4).....less than 500m
• Maximum wire length
(L
1+L2+L4 or L1+L3 or L2+L3+L4).....less than 200m
• Remote controller wire
(R)....network controller wire is less than 10m
Note 1: Please make sure that the transmission wire is
grounded at the outdoor unit ground terminal.
Note 2: If the remote controller wire is greater than 10m,
the excess portion should use shielded wire at
least 1.25mm
2
in size. Please make sure that the
total length of the farthest wire is less than 200m.
L2
Outdoor unit
L3
L1
L4
1.25mm
2
shielded
wire
R
R
Indoor unit
(Note 1)
(Note 2)
Grounded
Remote controller
OC183E--4.qxp 10.5.6 0:54 PM Page 104
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