Mitsubishi Electric CITY MULTI PUHY-YMC Installation Manual page 31

• Length of wire to the most remote unit via the outdoor unit : L
• Length of wire to the most remote unit via the indoor system : L
Remote control wire length : r
•
OS
(54)
TB3
M1 M2 S
Shielded cable
OS
(53)
TB3
M1 M2 S
• Connect the S terminal of the centralized control terminal block (TB7) of one variable capacity unit only to the ground
equipment panel.
• The transmission line terminal blocks (TB5) of indoor units (IC) connected to different cooling systems should not be connected together.
Note:
1. If there is one or more 200 or higher indoor units within the same cooling system, and the number of indoor units exceeds 16 units, a
transmission booster is necessary. (When a "PAR-F25MA Ver. F or subsequent version of remote control is used)
2. If there is not even one 200 or higher indoor unit within the same cooling system, and the number of indoor units exceeds 20 units, a
transmission booster is necessary. (When a "PAR-F25MA Ver. F or subsequent version of remote control is used)
* For details, see wire connection example C.
, r , r , r
10 m (0.5 to 0.75 mm
1 2 3 4 =
If the length exceeds 10 m, use 1.25 mm
extended length and the length to the most remote unit.
Group 1
OC
CN40 IC
(51)
(01)
TB3
TB5 TB13
M1 M2
M1M2 S 1 2 3
M1M2 S
TB7
TB6
(101)
RC
OC
IC
(52)
(02)
TB3 TB5 TB13
M1 M2 M1M2 S 1 2 3
M1M2 S
TB7
+L +L +L +L +L +L +L ,
1 2 3 4 5 6 7 9
L +L +L +L +L +L +L +L 500 m (1.25 mm
1 2 3 4 5 6 8 9 =
+L +L +L , L +L +L , L +L
1 2 3 4 5 6 7 5 6
2
)
2
wire and calculate the length of that portion (L
Group 3
IC IC
(04) (05)
TB5 TB13 TB5
M1M2 S 1 2 3 M1M2 S
TB6
(105)
RC
IC
(03)
TB5 TB13 TB5
M1M2 S 1 2 3 M1M2 S
TB6
(103)
RC
2 )
2
+L , L +L 200 m (1.25 mm )
8 7 8 =
) as within the total
8
Group 5
IC
(06)
TB13 TB5 TB13
1 2 3 M1M2 S 1 2 3
TB6
(155)
RC
IC
(07)
TB13
1 2 3
of the electrical
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