Panasonic 2WAY Multi Technical & Service Manual page 177

Number units to connect
1) Number of units to connect
• Number of outdoor units that can be connected .............................. Max 30
• Number of outdoor units that can be connected .............................. Max 64
• Centralized control devices that can be connected ........................... Max 10
(* Total number of each type of devices within 1 link wiring is up to 100.)
2) Indoor and outdoor unit operation lines
● Wiring Non-polar biaxial wires
● Wire types
Eco electrical Previous
wire code code
EM-CEE CVV
ECO120 VCT
EM-ECTF VCTF
EM-EEF VVF
EM-CPEES CPEVS
EM-K-CPEE KPEVS
EM-MEE-S MVVS
Note: Either block out the light or use UV-resistant cables if wiring is affected by ultraviolet rays (sunlight,
lighting, etc.)
● Cable thickness : 0.5mm
● Insulated length : Maximum 1km for the entire cable length
● Precautions
1. Do not lay signal cables next to power line in order to prevent miss-operations.
2. Maintain a distance of 50 mm or more between the power lines of other air-conditioning units
manufactured by Panasonic.
3. Maintain a distance of 300 mm or more between other power lines.
4. In the event of the cables needing to be laid within the above-mentioned distances, make sure one of
them is enclosed in a steel power-line conduit.
5. When shielded cables are in use, make sure one side is grounded.
6. Do not use the same cable for signal cables and power cables. (Fig.1)
7. Do not use multi-core cables for two or more signal cables. (Fig.2)
8. Wiring
• Bus systems must be used as a basic principle for multiple systems.(Fig.3)
Only a maximum of 16 branches can be used. (Fig.3)
The length of the cable between branches must be 2 m or more. (Fig.3)
If there are more than 17 branches, reduce the number of branch locations. (Fig.4)
(Putting 2 refrigerant systems to 1 wiring system, etc.)
Not include in branch within 1 m. (Fig.5)
Branches can only contain a maximum of 3 cables. 4 or more cables are prohibited. (Fig.6)
A branch after the branching of a wire is prohibited. (Fig.7)
Looped cables are prohibited. (Fig.8)
• Consecutive suspension systems must be used as a basic principle for single systems. (Fig.9)
● Terminal resistance
To be set at one location when one outdoor unit is in use, and at two locations when multiple units are in
use.
Name (previous name)
Heat-resistant polyethylene sheath control cable (Vinyl insulated vinyl
sheath control cable)
Heat-resistant polyethylene insulated heat-resistant polyethylene
sheath cabtire round cable (Vinyl insulated vinyl cabtire cable)
Heat-resistant polyethylene insulated heat-resistant polyethylene
sheath cabtire round cord (Vinyl cabtire round cord)
600V heat-resistant polyethylene fl at cable (600V vinyl insulated vinyl
sheath fl at cable)
Shielded polyethylene insulated heat-resistant polyethylene sheath
communication cable for city use (Shielded polyethylene insulated
vinyl sheath cable for city use)
Shielded polyethylene insulated heat-resistant polyethylene sheath
instrumentation cable for city use (Shielded polyethylene insulated
vinyl sheath cable for city use)
Heat-resistant polyethylene cord for use with covered microphones
(Vinyl cord for use with covered microphones)
2 2
- 2mm
V–58
*
Applicable
standard
JIS C 3401
JIS4501
JIS C 3312
JIS C 3306
JIS C 3342
-
JIS C 5402
JCS4271