Wiring Transmission Cables - Mitsubishi Electric Y Series Installation Manual

[Fig. 11.2.1]
A
Power supply terminal block Terminal block for indoor –
outdoor transmission line
(TB1)
Control box
L1 L2 L3 N
C
A Power source
C Earth screw
[Fig. 11.2.2]
A
B
C
A Cable strap
C Transmission line

11.3. 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
• Maximum wiring length: Within 200 m
• Maximum length of transmission lines for centralized control and indoor/outdoor transmission lines (Maximum length via outdoor units): 500 m MAX
The maximum length of the wiring between power supply unit for transmission lines (on the transmission lines for centralized control) and each outdoor unit and
system controller is 200 m.
2. Remote control cables
• ME Remote Controller
Kind of remote control cable Sheathed 2-core cable (unshielded) CVV
Cable diameter 0.3 to 1.25 mm
When 10 m is exceeded, use cable with
Remarks the same specifications as 1. Wiring
transmission cables.
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.)
*3 When a PAR-31MAA is connected to a group, no other MA remote controllers can be connected to the same group.
B
Terminal block for
centralized control
(TB3)
(TB7)
B Transmission line
B Power source line
or ø1.2 mm
2
(0.75 to 1.25 mm )*
2 2
OS1, OS2
• If there are any gaps around the wires, please be sure to fill these in with a
suitable material.
2 Conduit tube installation
• Open by hammering the knockout holes for the conduit tube located on the
base and the bottom part of the front panel.
• When installing the conduit tube directly through the knockout holes, remove
the burr and protect the tube with masking tape.
• Use the conduit tube to narrow down the opening if there is a possibility of
small animals entering the unit.
• When taking the conduit tube out from the bottom part of the unit, caulk
around the tube opening to prevent water penetration.
• MA Remote Controller
Kind of remote control cable
Cable diameter
Remarks
* Connected with simple remote controller.
Code Possible unit connections
OC – (*2)
– (*2)
IC 1 to 26 units per 1 OC (*1)
RC 2 units maximum per group (*3)
RP 0 to 1 unit per 1 OC (*1)
Sheathed 2-core cable (unshielded) CVV
0.3 to 1.25 mm (0.75 to 1.25 mm )*
2 2
Within 200 m
21