Wiring Examples - Mitsubishi Electric CITY MULTI PUHY-P-YJM-A serie Installationshandbuch

2 Wiring examples

• Controller name, symbol and allowable number of controllers.
Name
Main unit
Outdoor unit
Sub unit
Indoor unit Indoor unit controller
Remote controller Remote controller (*1)
Other Transmission booster unit
*1 A transmission booster (RP) may be required depending on the number of connected indoor unit controllers.
*2 OC, OS1, and OS2 of the outdoor units in the same refrigerant system are automatically identified. They are identified as OC, OS1, and OS2 in descending order of
capacity. (If the capacity is the same, they will be in ascending order of their address number.)
Example of a group operation system with multiple outdoor units (Shielding wires and address setting are
necessary.)
<Examples of transmission cable wiring>
[Fig. 11.3.1] ME Remote Controller (P.9)
*1: When the power supply unit is not connected to the transmission line for centralized control, disconnect the male power supply connector (CN41) from ONE
outdoor unit in the system and connect it to CN40.
*2: If a system controller is used, set SW2-1 on all of the outdoor units to ON.
[Fig. 11.3.2] MA Remote Controller (P.10)
<A> Change the jumper connector from CN41 to CN40
<B> SW2-1:ON
<C> Keep the jumper connector on CN41
Group 1
A B
( ) Address
[Fig. 11.3.3] Combination of outdoor units and transmission booster unit (P.10)
<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, OC-OS, OS-OS, and IC-IC wiring
intervals.
b. Use feed wiring to connect terminals M1 and M2 and the earth terminal
M2 and terminal S on the transmission line block of the indoor unit (IC). For OC and OS, connect TB3 to TB3.
c. Connect terminals 1 (M1) and 2 (M2) on the transmission line 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 in a different refrigerant system (OC). For OC
and OS in the same refrigerant system, connect TB7 to TB7.
e. When the power supply unit is not installed on the central control transmission line, change the jumper connector on the control board from CN41 to CN40 on only
one outdoor unit in the system.
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
the step above to the earth 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.
Unit
Indoor unit (Main)
Indoor unit (Sub)
Outdoor Unit (OC, OS)
ME R/C (Main)
ME R/C (Sub)
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 the centralized remote controller is connected to the system, set centralized control switches (SW2-1) on control boards in all outdoor units (OC, OS) to "ON".
*1 OC, OS1, and OS2 of the outdoor units in the same refrigerant system are automatically identified. They are identified as OC, OS1, and OS2 in descending order of
capacity (If the capacity is the same, they are identified in the ascending order of their address number).
<Permissible Lengths>
1 ME Remote controller
• Max length via outdoor units: L +L
1
• Max transmission cable length: L
• Remote controller cable 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: m
3 Transmission booster
• Max transmission cable length (M-NET cable):
20
Group 3 C Group 5
in the electrical component box.
Range
01 to 50 Use the most recent address within the same group of indoor units.
Use an address, other than that of the IC (Main) from among the units within the same group of indoor
01 to 50
units. This must be in sequence with the IC (Main).
Set the addresses of the outdoor units in the same refrigerant system in the order of sequential
51 to 100
number. OC, OS1, and OS2 are automatically identified. (*1)
101 to 150 Set at an IC (Main) address within the same group plus 100.
151 to 200 Set at an IC (Main) address within the same group plus 150.
– Unnecessary address setting (Necessary main/sub setting)
+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
, , , 10 m (0.3 to 1.25 mm )
2
1 2 3 4
If the length exceeds 10 m, use a 1.25 mm
the maximum length and overall length.
+L +L +L and L +L +L
1 2 3 4 1 2
and L +L and L and L
1 3 4 6
+m and m +m +m +m 200 m (0.3 to 1.25 mm
1 2 1 2 3 4
1 L +L +L +L +L 200 m (1.25 mm
1 2 3 5 6
2 L +L +L +L +L 200 m (1.25 mm
1 2 3 5 7
3 L +L +L 200 m (1.25 mm
1 2 4
4 L +L +L +L , L +L +L
6 5 3 4 4 3
Code Possible unit connections
OC – (*2)
OS1, OS2 – (*2)
IC 1 to 32 units per 1 OC (*1)
RC 2 units maximum per group
RP 0 to 1 unit per 1 OC (*1)
Shielded wire
D E
on the transmission line terminal block (TB3) of each outdoor unit (OC) to terminals M1,
Setting Method
+L 500 m (1.25 mm or more)
2
2 6
+L 200 m (1.25 mm or more)
2
6
shielded wire. The length of this section (L
2
500 m (1.25 mm or more)
2
6
+L 200 m (1.25 mm or more)
2
2 6
)
2
)
2
)
2
)
2
+L 200 m (1.25 mm )
2
5 7
Sub remote controller
) should be included in the calculation of
8