Mitsubishi Electric PURY-P72 Service Handbook page 39

[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 (OC and OS), of the terminal block for indoor-out-
door transmission line (TB02) on the main and sub BC
controllers (BC and BS), and of the terminal block for in-
door-outdoor transmission line (TB5) on each indoor unit
(Ie).
(Non-polarized two-wire)
-Only use shielded cables.
Note
I
The outdoor units in the same refrigerant circuit are au-
tomatically designated as OC and
as
in the order of ca-
pacity from large to small (if two or more units have the
same capacity, in the order of address trom small to
large).
Shielded cable connection
Daisy-chain the ground terminal ( rh) on the outdoor
units (OC and OS), the S terminal of the terminal block
(TB02) on BC and BS, and the S terminal of the terminal
block (TB5) on the indoor unit (IC) with the shield of the
shielded cable.
(5) Address setting method
2) Transmission line for centralized control
No connection is required.
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 indoor unit (IC) to the appropriate terminals
on the terminal block (TB5) on LOSSNAY (LC). (Non-po-
larized two-wire)
-Interlock setting between the indoor units and LOSS-
NAY units must be entered on the remote controller. (Re-
fer to "IV [3] Interlock Settings via the MA Remote
Controller" or the installation manual for the MA remote
controller for the setting method.)
5) Switch setting
Address setting is required as follows.
Address
Fac-
Proce-
Unit or controller setting Setting method
Notes
tory
dures set-
range
ling
1 Indoor Main unit IC 01 to 50
'Assign the smallest address to the main
-Port number setting is
00
unit
unit in the group.
required
'In a system with a sub BC controller,
make the settings for the indoor units in
-To perform a group op-
the following ortler.
eration of indoor units
(i) Indoor unit to be connected to the main
that feature different
BC 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 main unit.
the 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 50 Assign an arbitrary but unique address to
None of these addresses may 00
each of these units after assigning an ad-
overlap any of the indoor unit
dress to all indoor units.
addresses.
3 MA Main MA No set-
-
Main
remote remote
tings ra-
controller controller quired.
Sub MA Sub
Settings to be made with the Subl
remote remote
Main switch
controller controller
4 Outdoor unit OC
51 to 100
'Assign sequential address to the outdoor •To set the address to
100,
00
as units in the same refrigerant circuit. set the rotary switches to 50.
'The outdoor units are automatically des- -If the addresses that is as-
ignated as OC and OS.(Note) signed to the main BC con-
5 Auxiliary BCcon- BS 51 to 100 Assign an address that equals the sum of
troller overlaps any of the
addresses that are assigned
outdoor
troller (Sub) the smallest address of the indoor units to the outdoor units or to the
unit
that are connected to the sub BC controller sub BC controller, use a dif-
and 50. ferent. unused address with·
BC control-
BC OC (or OS if it exists) +1
in the setting range.
-The use of a sub BC control-
ler (Main)
ler requires the connection
of a main BC controller.
Note
I
The outdoor units in the same refrigerant circuit are automatically designated as OC and
as.
They are designated as OC and OS in the descending order of capacity (ascending order of address if the capacities are the
same).
HWE0803A
- 29-
GB