Mitsubishi Electric CITY MULTI PURY-P400YMF-C Installation Manual page 12

Example of a group operation system with multiple outdoor units (Shielding wires and address setting are
necessary.)
<Examples of Transmission Cable Wiring>
[Fig. 9.3.1] M-NET Remote Controller (P.4)
[Fig. 9.3.2] MA Remote Controller (P.4)
[Fig. 9.3.3] Transmission booster unit (P.4)
A Group 1 B Group 4
( ) Address
<Wiring Method and Address Settings>
a. Always use shielded wire when making connections between the outdoor unit (OC), the indoor unit (IC) and BC controller (BC, BS) as well for all OC-OC, and IC-IC wiring
intervals.
b. Use feed wiring to connect terminals M1 and M2 and the ground terminal on the transmission cable terminal block (TB3) of each outdoor unit (OC) to terminals M1, M2
and terminal S on the transmission cable block of the indoor unit (IC) and BC controller (BC, BS).
c. Connect terminals 1 (M1) and 2 (M2) on the transmission cable terminal block of the indoor unit (IC) that has the most recent address within the same group to the
terminal block on the remote controller (RC).
d. Connect together terminals M1, M2 and terminal S on the terminal block for central control (TB7) for the outdoor unit (OC).
e. On one outdoor unit only, change the jumper connector on the control panel from CN41 to CN40.
f. Connect the terminal S on the terminal block for central control (TB7) for the outdoor unit (OC) for the unit into which the jumper connector was inserted into CN40 in Step
above to the ground terminal
g. Set the address setting switch as follows.
* To set the outdoor unit address to 100, the outdoor address setting switch must be set to 50.
To set the M-NET R/C address to 200, the M-NET R/C address setting switch must be set to 00.
Unit Range
IC (Main) 01 to 50
IC (Sub) 01 to 50
Outdoor Unit 51 to 100
BC controller (Master) 51 to 100
BC controller (Slave) 51 to 100
M-NET R/C (Main) 101 to 150
M-NET R/C (Sub) 151 to 200
MA R/C
h. The group setting operations among the multiple indoor units is done by the remote controller (RC) after the electrical power has been turned on.
i. When using a transmission booster (RP)
• Let the number of indoor units and remote control units connected be within the limit for the number of units shown in the following table for the total of the number of
units connected between the outdoor unit (OC) and the transmission booster (RP) N
• Connect the power supply ground to the transmission booster (RP) securely.
Connect the transmission lines of the outdoor unit side to terminals A and B of transmission line terminal block 1 (TB2) of the transmission booster (RP).
Connect the transmission lines of the expansion indoor unit side to terminals A and B of the of transmission line terminal block 2 (TB3) of the transmission booster (RP).
(*1)
Capability of the
connected indoor units
one BC controller
200 or lower
two BC controller
one BC controller
200 or higher
two BC controller
*1 If even one unit that is higher than 200 exists in the cooling system, the maximum capacity will be "200 or higher".
<Branch Setting>
Set the indoor unit branch No. switch to the branch No. of the BC controller connecting the piping and that indoor unit.
When using two or more branches, set the lowest branch No.
The indoor unit capacity that can be connected per branch is P80 or less and the number of connectable units is 3.
<Permissible Lengths>
1 M-NET Remote controller
• Max length via outdoor units: L +L
1
• Max transmission cable length: L
• Remote controller cable length: r
If the length exceeds 10 m, use a 1.25 mm
maximum length and overall length.
2 MA Remote controller
• Max length via outdoor unit (M-NET cable): L
• Max transmission cable length (M-NET cable): L
• Remote controller cable length: c
3 Transmission booster
Max transmission cable length (M-NET cable): 1 L
•
12
C Group 5
in the electrical component box.
Use the most recent address within the same group of indoor units. Make the indoor units address connected to the BC
controller (Slave) larger than the indoor units address connected to the BC controller (Master)
Use an address, other than that of the IC (Main) from among the units within the same group of indoor units. This must be
in sequence with the IC (Main)
Use the most recent address of all the indoor units plus 50
Outdoor unit address plus 1. When the set indoor unit address duplicates the address of another indoor unit, set the new
address to a vacant address within the setting range.
Lowest address within the indoor units connected to the BC controller (slave) plus 50
Set at an IC (Main) address within the same group plus 100
Set at an IC (Main) address within the same group plus 150
– Unnecessary address setting (Necessary main/sub setting)
Number of connected indoor units that can be
connected without a RP
The number of indoor units and the total number of remote controllers is displayed within the parenthesis ( ).
+L +L and L +L +L +L and L +L
2 3 4 1 2 3 5 1
and L +L and L +L and L and L
1 3 4 3 5 6 2
, r , r , r 10 m (0.3 to 1.25 mm
=
1 2 3 4
+L +L +L and L +L +L
1 2 3 4 1 2
and L +L and L and L
1 3 4 6
and c +c +c and c +c +c +c
1 1 2 3 1 2 3
+L +L +L +L +L
8 1 2 3 5 6
2 L
+L +L +L +L +L
8 1 2 3 5 7
3 L
+L +L +L 200 m (1.25 mm
=
8 1 2 4
4 L +L +L +L , L +L
6 5 3 4 4 3
D Shielded Wire
Setting Method
and the number of units connected after the transmission booster (RP) N
1
Remote controller type
2
+L +L 500 m (1.25 mm or more)
=
2 6 7
+L and L 200 m (1.25 mm 2 or more)
=
6 7
2 )
2
shielded wire. The length of this section (L
+L 500 m (1.25 mm 2 or more)
=
6 7
+L and L 200 m (1.25 mm 2 or more)
=
2 6 7
200 m (0.3 to 1.25 mm 2 )
=
4
2
200 m (1.25 mm )
=
2
200 m (1.25 mm )
=
2
)
+L +L 200 m (1.25 mm 2 )
=
5 7
E Sub Remote Controller
Remote controller
MA R/C M-NET R/C
32 19 (38)
32 18 (36)
26 15 (30)
26 14 (28)
) should be included in the calculation of the
8
.
2