Mitsubishi Electric PURY-P72 Service Handbook page 42

[II Restrictions J
4. A system in which a system controller is connected to the transmission line for centralized control and which is pow-
ered from an outdoor unit
(1) Sample control wiring
112
,
,
~---------~-_:
_ Inlerlock operallon with
the ventilation unit
NoIe1 When only (he LM adapter
is
connected,
leave SW2-11o OFF <as it
is).
Note2 LM adapters require the Power supply
""paClIy of smgle-phas. AC 220· 240V.
m3
Group Group
.
-
- - - - - -
--
- - -
-
~
01
Ie
,
,
, ,
·_--------------------------,
BC
53
111
\
\
\
I
I
(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 shield terminal (S terminal) and the earth terminal (
rh )
on the terminal block for transmission line for centralized control
(TB7) on the outdoor unit whose power jumper connector is mated
with 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 included in the connected in- 27 - 50 units
-
door units
When the P72 and P96 models are
included in the connected indoor 21 - 39 units 40 - 50 units
units
-The left table shows the number of transmission boosters
that is required by the system with three BC controllers. For
each BC controller that is subtracted from the above-men-
tioned system, two additional indoor units can be connected.
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).
(3) Maximum allowable length
1) Indoor/outdoor transmission line
Same as [5J 3.
2) Transmission line for centralized control
Maximum line distance via outdoor unit
(1.25mm
2
[AWG16J or larger)
L32+L31+L12(L11) ::;500m [1640ftJ
L32+L22(L21) ::; 500m [1640ftJ
L12(L11 )+L31 +L22(L21) ::;500m[1640ftJ
3) MA remote controller Wiring
Same as [5J 1.
HWEOB03A
- 32-
GB