Wiring Transmission Cables; Wiring Examples - Mitsubishi Electric CITY MULTI Manual De Instalación

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

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 [656 ft]
• Maximum length of transmission lines for centralized control and indoor/outdoor transmission lines (Maximum length via outdoor units): 500 m [1640 ft] 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 [656 ft].
2. Remote control cables
• M-NET Remote Controller
Kind of remote control cable Sheathed 2-core cable (unshielded) CVV
0.3 to 1.25 mm
Cable diameter
(0.75 to 1.25 mm
When 10 m [32 ft] is exceeded, use cable
Remarks with the same specifications as 1. Wiring
transmission cables.
• MA Remote Controller
Kind of remote control cable Sheathed 2-core cable (unshielded) CVV
0.3 to 1.25 mm
Cable diameter
(0.75 to 1.25 mm
Remarks Within 200 m [656 ft]
* Connected with simple remote controller.

2 Wiring examples

• Controller name, symbol and allowable number of controllers.
Name
Outdoor unit Main unit
Sub unit
BC controller Main 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 and OS of the outdoor units in the same refrigerant system are automatically identified. They are identified as OC and OS 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-30MAAU is connected to a group, no other MA remote controllers can be connected to the same group.
B
Terminal block for
outdoor transmission line centralized control
(TB3) (TB7)
B Transmission line
B Power source cable
[AWG16]
2
[AWG 22 to 16]
2
[AWG 18 to 16])*
2
[AWG 22 to 16]
2
[AWG 18 to 16])*
2
• When using wire size AWG 14, AWG 12, or AWG 10, be sure to use
knockout hole 2.
• When using wire size AWG 8 or AWG 6, be sure to use knockout hole 4.
• When using wire size AWG 4, AWG 3, or AWG 2 be sure to use knockout
hole 3.
• When using wire size AWG
hole 5.
• 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.
Code Possible unit connections
OC – (*2)
OS – (*2)
BC One controller for one OC
BS Zero, one or two controllers for one OC
IC 1 to 20 units per 1 OC (*1)
RC 2 units maximum per group (*3)
RP 0 to 2 units per 1 OC (*1)
/ , AWG / , or AWG 0, be sure to use knockout
3 2
0 0
23