Mitsubishi Electric CITY MULTI PURY-P-YGM-A Manuel D'installation page 13

2 Wiring examples
• Controller name, symbol and allowable number of controllers.
Name Symbol
Outdoor unit controller OC
BC Controller (Master) BC
BC Controller (Slave) BS
Transmission booster unit RP
Indoor Unit Controller IC
Remote Controller RC
*1 A transmission booster (RP) may be required depending on the number of connected indoor unit controllers.
Example of a group operation system with multiple outdoor units (Shielding wires and address setting are
necessary.)
<Examples of transmission cable wiring>
[Fig. 10.3.1] M-NET Remote Controller (P.5)
[Fig. 10.3.2] MA Remote Controller (P.5)
[Fig. 10.3.3] Transmission booster unit (P.5)
<A> Change the jumper connector from CN41 to CN40.
<B> SW2-1:ON
<C> Keep the jumper connector on CN41.
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) and the indoor unit (IC), as well for all OC-OC, and IC-IC wiring intervals.
b. Use feed wiring to connect terminals M1 and M2 and the earth 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).
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 earth terminal in the electrical component box.
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.
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.
<Permissible Lengths>
1 M-NET Remote controller
• Max length via outdoor units: 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
Remote controller cable length: r
•
Allowable number of controllers
One controller for one OC
Zero, one or two controllers for one OC
Zero or one unit for one OC (*1)
Two to twenty four controllers for one OC (*1)
Maximum of two per group
C Group 5
Use the most recent address within the same group of indoor units. With an R2 system with sub BC controllers, set the
indoor unit address in the following order:
1 Indoor units connected to the main BC controller
2 Indoor units connected to BC sub controller 1
3 Indoor units connected to BC sub controller 2
Set the indoor unit addresses so that all the addresses of 1 are smaller than those of 2, and that all the addresses of 2
are smaller than those of 3.
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)
+ L + L + L and L + L + L + L and L
2 3 4 1 2 3 5
and L + L and L + L and L and L
1 3 4 3 5 6
, r , r , r 10 m (0.3 to 1.25 mm
=
1 2 3 4
+ L + L + L and L + L
1 2 3 4 1
and L + L and L and L
1 3 4 6
and c + c + c and c + c + c
1 1 2 3 1 2
+ L + L + L + L
8 1 2 3
2 L + L + L + L + L
8 1 2 3
3 L
+ L + L + L
=
8 1 2 4
4 L
+ L + L + L , L
6 5 3 4 4
, r 2
10 m (0.3 to 1.25 mm )
=
1 2
If the length exceeds 10 m, use 1.25 mm
length and the longest remote length.
D Shielded wire
Setting Method
+ L + L 500 m (1.25 mm 2 or more)
=
1 2 6
+ L 200 m (1.25 mm 2 or more)
=
2 6
2 )
2
shielded wire. The length of this section (L
2
+ L 500 m (1.25 mm or more)
=
2 6
+ L 200 m (1.25 mm 2 or more)
=
2 6
+ c 200 m (0.3 to 1.25 mm 2
=
3 4
+ L 200 m (1.25 mm 2 )
=
5 6
+ L 200 m (1.25 mm 2 )
=
5 7
2
200 m (1.25 mm )
2
+ L + L + L 200 m (1.25 mm )
=
3 5 7
2 shielded cable and calculate the length of that portion (L
E Sub remote controller
) should be included in the calculation of the
8
)
and L ) as within the total extended
4 7
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