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6.3. Wiring transmission cables
1
Types of control cables
1. Wiring transmission cables
Types of transmission cables
Shielding wire CVVS, CPEVS or MVVS
Cable diameter
More than 1.25 mm
2
Maximum wiring length
Within 200 m
2. M-NET Remote control cables
Types of remote control cables Shielding wire CVVS, CPEVS or MVVS
Cable diameter
0.5 to 1.25 mm
2
Remarks
When 10 m is exceeded, use cable with the same
specifications as transmission line wiring cables.
3. MA Remote control cable
Type of remote control cable
Sheathed 2-core cable (unshielded) CVV
Cable diameter
0.3 to 1.25 mm
2
(0.75 to 1.25 mm
2
)*
Remarks
Within 200 m
* Connected with simple remote controller.
Example of a group operation system with multiple outdoor units (Shielding wires and address setting are necessary.)
<Examples of Transmission Cable Wiring: When Not Using a Branch Box>
■
Refer to Fig. 6-6 from Fig. 6-2.
<Wiring Method and Address Settings: without Branch box system>
a. Always use shielded wire when making connections between the outdoor unit (OC) and the indoor unit (M-IC).
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 terminal block of the indoor unit (M-IC).
c. Connect terminals 1 (M1) and 2 (M2) on the transmission cable terminal block of the indoor unit (M-IC) that has the most recent address within the same group to the terminal
block on the remote controller (M-NET RC).
d. Connect together terminals M1, M2 and terminal S on the terminal block for centralized control (TB7) for the outdoor unit (OC).
e. The jumper connector CN41 on the control panel does not change.
f. Connect shield ground of the indoor units transmission line to the shield (S) terminal of (TB3).
Connect shield ground of the line between outdoor units and the centralized control system transmission line to the shield (S) terminal of (TB7).
g. Set the address setting switch as follows.
Unit
Range
Setting Method
M-IC (Main)
01 to 50
Use the most recent address within the same group of indoor units
M-IC (Sub)
01 to 50
Use an address, other than that of the M-IC (Main) from among the units within the same group of indoor units. This
must be in sequence with the M-IC (Main)
OC
51 to 100
Use the most recent address of all the indoor units plus 50
* The address automatically becomes “100” if it is set as “01 - 50”.
M-NET RC (Main)
101 to 150
Set at an M-IC (Main) address within the same group plus 100
M-NET RC (Sub)
151 to 200
Set at an M-IC (Main) address within the same group plus 150
MA-RC
–
Unnecessary address setting (Necessary main/sub setting)
h. The group setting operations among the multiple indoor units is done by the remote controller (M-NET RC) after the electrical power has been turned on.
i. When connecting a PWFY unit
• Do not perform the group settings for the PWFY unit and the indoor units.
• The PWFY unit and a Lossnay unit cannot be set to operate at the same time.
• Use a WMA remote controller for the PWFY unit.
For details, refer to the installation manual for the PWFY unit.
j. When connecting a Cylinder or Hydrobox unit
• Do not perform the group settings for the Cylinder or Hydrobox unit and the other indoor units.
<Wiring Method and Address Setting: include Branch box system>
Please refer to the Branch box Installation Manual.
6. Electrical work
M1
S
M2
M1
S
M2
TB3
TB7
D
E
F
A
B
C
TB1
L N
B1 B2
A
Power source
B
Power supply for branch box
C
Screw on the electrical component box for
ground connection (TB1/TB1B)
D
Transmission line
6.2. Control box and connecting position of wiring
(Fig. 6-1)
1. Connect the wiring between the outdoor unit and the indoor unit or branch box to
the transmission terminal block (TB3) of the outdoor unit.
Connect the wiring between the outdoor unit and the centralized control system
to the transmission terminal block (TB7) of the outdoor unit.
When using shielded wiring, connect the ground of the shielded wiring to the
shield terminal (S) of the terminal block (TB3) or (TB7).
If the connection of the outdoor unit’s transmission power supply connector has
been changed from CN41 to CN42, connect the shield terminal (S) of the terminal
block (TB7) to the screw (
F
) using the included lead wire.
* The shield (S) terminal of the transmission terminal block (TB3) is connected to
the ground (
E
) when the unit is shipped from the factory.
2. The terminal (B1) and (B2) on the terminal block (TB1B or TB1) is for supplying
power to the branch box (220 – 240 VAC. max 6 A).
3. Remove the knock-out pieces from the piping cover, pass the power supply and
transmission wires through the appropriate knock-out holes, and connect the
wires to the terminal block.
4. Fix power source wiring to terminal box by using buffer bushing for tensile force
(PG connection or the like).
Caution:
Never connect the transmission line for the indoor unit or the centralized control
system transmission line to this terminal block (TB1). If the transmission lines
are connected, the indoor unit terminal block or centralized control terminal
block could be damaged.
Fig. 6-1
<PUMY-P·VKM>
M1
S
M2
M1
S
M2
TB3
TB7
B1 B2
TB1B
L1 L2 L3 N
TB1
A
B
C
D
E
F
<PUMY-P·YKM(E)>
E
Screw on the electrical component box for
ground connection (TB3)
F
Screw on the electrical component box for
ground connection (TB7)
2
Wiring examples
• Controller name, symbol and allowable number of controllers.
Name
Symbol
Allowable number of controllers
Outdoor unit controller
OC
–
Indoor unit
controller
CITY
MULTI
series
M-IC
PUMY-P112
1 to 9 units per 1 OC *1
PUMY-P125 1 to 10 units per 1 OC *1
PUMY-P140 1 to 12 units per 1 OC *1
M, S, P
series
A-IC
2 to 8 units per 1 OC *1
Branch box
BC
0 to 2 units per 1 OC *1
Remote
controller
M-NET
M-NET RC *2 Maximum of 12 controllers for 1 OC (Can
not be connected if Branch box is used.) *1
MA
MA-RC
Maximum of 2 per group
Wireless
WL-RC
–
Note:
*1. The number of connectable units may be limited by some conditions such
as an indoor unit’s capacity or each unit’s equivalent power consumption.
*2. Don’t use the Lossnay controller (PZ-61DR-E, PZ-43SMF-E, PZ-52SF-E,
PZ-60DR-E).
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