Daikin GYEQ20AN Service Manual page 72

Wiring Manual
2. Wiring Connection and Capacity
Guidelines on link (communication) and remote control cables
Never connect the terminal block for link (communication) cables with a power supply (e.g. 200 V or
240 V). Doing so would break the entire system.
Link (communication) cables should be laid away from power supply cables so that they will not be
exposed to electric interference.
Never connect two or more indoor units/remote controllers using the same cable with 3 or more
cores because doing so would
result in abnormal stops.
Remote control cables and link
(communication) cables between
outdoor and indoor units should
neither be laid through the same
conduit as a power supply cable
or laid close to each other.
Never use a cable with 3 or more
cores as a link (communication)
cable.
As far as practicable, avoid laying a link (communication)/remote control cable parallel to electrical
voltage lines including a power supply cable. If the above is unavoidable, establish a constant offset
distance between the two cables, or lay either cable through a metal conduit that is grounded at one
end. The offset distance should meet the requirements described below. If there is an applicable
legal regulation, however, that regulation takes precedence.
As far as practicable, avoid laying a link (communication)/remote control cable parallel to another
link (communication)/remote control cable. If that is unavoidable, establish a constant offset distance
between the two cables, or lay cables separately inside a special metal conduit that is grounded at
one end by transmission system. The offset distance should meet the requirements described below.
If there is an applicable legal regulation, however, that regulation takes precedence.
[Offset distance]
If the power supply cable belongs to an outdoor unit, indoor unit, or DAIKIN air conditioning system, the offset
distance should be 50 mm or greater.
If the power supply cable is a heavy power supply cable that belongs to some other unit or system, the offset
distance should meet the requirements described in this table:
61
Communication Wiring
Good
Outdoor Indoor
unit unit
Note: Install an independent-line communication
wiring between the indoor and outdoor units.
220 V or less/10 A or less
220 V or less/50 A or less
220 V or less/100 A or less
220 V or less/100 A or more 1500 mm or more
* These offset distance requirements apply when two
cables are laid in parallel within the length of 100 mm.
– 4 –
Communication Wiring
No good
Multicore
cable
Outdoor Indoor
unit unit
Note: Never use a multicore cable for the communication
wiring from two or more outdoor units.
022658-00E
300 mm or more
500 mm or more
1000 mm or more
SiAUY361411EA
0FGHP-EN0821 DGJ002
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