Mitsubishi Electric PURY-P72 Service Handbook page 46

[II Restrictions]
6. An example of a system in which a system controller is connected to the indoor-outdoor transmission line (except
LM adapter)
(1) Sample control wiring
o
Numbers in IhBlqU." II'IIlQte porlllUlntlen
- ~ 1 D 8 C ~
_ _ ,"*-rIoclr. openlic:m wit! the wnli.lion. unlI
"1 When only the LM adapler is connecled, leave SW2-1 to OFF (as it
is).
'"2 LM adapters require the power supply capacity of single-phase AC 220 - 240V.
(2) Cautions
1) M-NET remote controller and MA remote controller cannot both be
connected to the same group of indoor units.
2) No more than 2 MA remote controllers can be connected to a group
of indoor units.
3) Do not connect the terminal blocks (TB5) on the indoor units that are
connected to different outdoor units with each other.
4) Replacement of male power jumper connector (CN41) must be per-
formed only on one of the
outdoor
units.
5) Short-circuit the S (shield) terminal of the terminal block for the cen-
tral control unit (TB7) and the ground terminal (rh) on the outdoor
unit whose power jumper was moved from CN41 to CN40.
6) When the number of the connected indoor units is as shown in the
table below, one or more transmission boosters (sold separately)
are required.
To connect two transmission boosters, connect them in parallel.
(Observe the maximum number of connectable indoor units that are
listed in the specifications for each outdoor unit.)
Number of transmission
booster (sold separately)
reqUired
1 unit 2 units
When the P72 and P96 models are not in- 27·50
-
eluded in the connected indoor units
units
When the P72 and P96 models are includ- 21 - 39 40 - 50
ed in the connected indoor units units units
-The table above shows the number of transmission boost-
ers that is required by the system with three
BC
controllers.
For each
Be
controller that is subtracted from the above-
mentioned system, two additional indoor units can be con-
nected.
7) When a power supply unit is connected to the transmission
line for centralized control, leave the power jumper connec-
tor on
CN41
as it is (factory setting).
HWEOB03A
- 36-
(3) Maximum allowable length
1) Indoor/outdoor transmission line
Maximum distance (1.25mm
2
[AWG16] or larger)
L11 +L12::; 200m [656ft]
L21+L22::;200m f656ft]
2) Transmission line for centralized control
Maximum line distance
via
outdoor unit
(1.25mm
2
[AWG16] or larger)
L32+L31 +L 12(L11) ::; 50Om [1640ft]
L32+L22(L21) ::; 500m [1640ft]
L12(L11 )+L31 +L22(L21) :::; 500m[1640ft]
3) MA remote controller wiring
Maximum overall line length
(0.3 to 1.25mm
2
[AWG22 to 16])
m1 :::;200m [656ft]
m2+m3:::;200m [656ft]
GB