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Mitsubishi Electric PURY-P72 Service Handbook page 45

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[II Restrictions]
(4) Wiring method
1)
Indoor/outdoor transmission line
Daisy-chain terminals M1 and M2 of the terminal block for indoor-
outdoor transmission line (TB3) on the outdoor units (DC and OS),
of the terminal block for indoor-outdoor transmission line (TB02) on
the main and sub BC controllers (BC and BS), of the terminal block
for indoor-outdoor transmission line (TB5) on each indoor unit (IC),
and the S terminal of the system controller,(Non-polarized two-wire)
-Only use shielded cables.
Note
I
The outdoor units in the same refrigerant circuit are automatically
designated as DC and
as
in the order of capacity from large to small
(if two or more units have the same capacity, in the order of address
from small to large).
Shielded cable connection
Daisy-ehain the ground terminal (
rh )
on the outdoor units (OC and
OS), the S terminal 01 the terminal block (TB02) on the BC and BS,
and the S terminal of the terminal block (TB5) on the indoor unit (IC)
with the shield of the Shielded cable.
2}
Transmission line for centralized control
Daisy-ehain terminals M1 and M2 on the terminal block for transmis-
sion line for centralized control (TB7) on the outdoor units (OC) in
different refrigerant cineuits and on the DC and OS in the same re-
frigerant cineui!.
If a power supply unit is not connected to the transmission line for
centralized control, replace the power Jumper connector on the con-
trol board from CN41 to CN40 on only one of the ou1door units.
Set the central control switch (SW2-1) on the control board of all out-
door units to "ON.'
(S) Address setting method
'Only use shielded cables.
Shielded cable connection
Daisy-chain the S terminal on the terminal block (TB7) on the out-
door units (DC, OS) with the shield wire olthe shielded cable. Short-
circuit the earth terminal (
rh )
and the S terminal on the terminal
block (TB7) on the outdoor unit whose power jumper connector is
mated with CN40.
3}
MA remote controller wiring
Same as
[5]1.
When 2 remote controllers are connected to the sys-
tem
Same as
[5]1.
Group operation of indoor units
Same as
[5]1.
4}
LOSSNAY connection
Connect terminals M1 and M2 on the terminal block (TB5) on the in-
door units (IC) to the appropriate terminals on the terminal block for
indoor-ou1door transmission line (TB5) on LOSSNAY (LC). (Non-po-
larized two-wire)
'Indoor units must
be
interlocked with the LOSSNAY unit using the
system controller. (Refer to the operation manual for the system
controller for the setting method.) Interlock setting from the remote
controller is required if the ON/OFF remote controller alone is con-
nected.
5}
Switch setting
Address setting is required as follows.
Ad-
Fac-
Proce-
Unit or controller
dress
Setting method
Notes
tory
dures
setting
set-
range
ting
1
Indoor
Main unit
IC
01
to
'Assign the smallest address to the main unit
'Port number setting is
00
unit
50
in the group.
reqUired
'In a system with a sub BC controller, make
-To perform a group op-
the settings for the indoor units in the fol-
lowing order.
eration of indoor units
(i) Indoor unit to be connected to the main BC
that feature different
controller
functions, designate
(ii) Indoor unit to
be
connected
to
sub BC
controller 1
the indoor unit in the
(iii) Indoor unit to
be
connected to sub BC
group with the greatest
controller 2
number of functions as
Make the settings for the indoor units in the
the main unit.
way that the formula "(i) < (ii) < (iii)" is true.
Sub unit
Assign sequential numbers starting with the
address of the main unit in the same group
+1. (Main unit address +1, main unit address
+2, main unit address +3, etc.)
2
LOSSNAY
LC
01
to
Assign an arbitrary but unique address to
None of these addresses may
00
50
each of these units after assigning an address
overlap any of the indoor unit
to all indoor units.
addresses.
3
MA
Main
MA
No set-
0
Make the same indoor unit
Main
remote
remote con-
tings re-
group settings with the system
troller
quired.
controller as the ones that
controller
were made with the MA remote
Sub
MA
SUb
Settings to be made with the Sub/
controller.
remote con-
remote
Main switch
troller
controller
4
Outdoor unit
OC
51 to 100
'Assign sequential address to the outdoor
'To set the address to 100,
00
OS
units in the same refrigerant circuit.
set the rotary switches to 50.
'The outdoor units are automatically desig-
·If the addresses that is as-
naled as OC and OS.(Note)
signed to the main BC con-
troller overlaps any of the
5
Auxiliary
BCcan-
BS
51 to 100
Assign an address that equals the sum of the
addresses that are assigned
outdoor
troller (Sub)
smallest address of the indoor units that are
to the outdoor units or to the
connected to the sub BC controller and 50.
sub BC controller, use a dif-
unit
feren!, unused address with-
ec
control-
BC
OC (or OS if it exists)
+1
in the setting range.
ler(Main)
•The use of a sub BC control-
ier requires the connection
of a main BC controller.
Note
I
The outdoor units in the same refrigerant circuit are automatically designated as OC and OS.
They are designated as OC and OS in the descending order of capacity (ascending order of address if the capacities are the
same).
HWE0803A
- 35-
GB
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