Mitsubishi Electric PURY-P72 Service Handbook page 40

[II Restrictions J
3. Group operation of units in a system with multiple outdoor units
(1) Sample control wiring
_ Interlock operation with
l12 the ventilation unit
5"i!<:UP___ __ _______ •
_!?~o~~
__ ._ •. __ •_
'?r.?~':
__ ._ .... __
Group
: --Ie"" --
-iC"" - ..
L11
L21
CllIi-oCHolORitpIItt
SW2ol0H
Be
53
Be
57
Ie
01
122
IC
02
, ,
~----------------~
Ie
03
04
Ie
06
05
LC
07
(2) Cautions
1) M-NET remote controller and MA remote controller can-
not 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 performed only on one of the outdoor units.
5) Provide grounding to S terminal on the terminal block for
transmission line for centralized control (TB7) on only
one of the outdoor units.
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) re-
Quired
1 unit 2 units
When the P72 and P96 mod-
els are not included in the 27 - 50 units
-
connected indoor units
When the P72 and P96 mod-
els are included in the con- 21 - 39 units
40 - 50 units
neeted indoor units
•The left table shows the number of transmission boost-
ers that is required by the system with three BC control-
lers. For each BC controller that is subtracted from the
above-mentioned system, two additional indoor units
can be connected.
(3) Maximum allowable length
1) Indoor/outdoor transmission line
Maximum distance (1.25mm
2
[AWG16J or larger)
L11+L12::;200m [656ftJ
L21+L22::;200m [656ftJ
2) Transmission line for centralized control
Maximum line distance via outdoor unit
(1.25mm
2
[AWG16J or larger)
L12+L31 +L22::; 500m [164oft]
L11 +L31 +L21::; 500m [1640ftJ
3) MA remote controller wiring
Same as [5J 1.
HWE0803A - 30- GB