Mitsubishi Electric PAC-IF051B-E Installation Manual page 61

. Multiple outdoor units control
.3.2 Slave unit
Connect each outdoor unit to a slave unit.
FTC4 (Slave) can be powered in two ways.
1. Power cable is run from the outdoor unit to a slave unit.
2. FTC (Slave) has indipendent power source.
FTC4 (Master) (PAC-IF051B-E) used as slave
• For wiring as a slave controller, refer to "4.1 Electrical connection". *1
*1 Don't connect the power cable to the booster heater because it doesn't work in
slave controller setting.
FTC4 (Slave) (PAC-SIF051B-E) <Fig. .3.3>
FTC4 (Slave) can be powered in two ways.
1. Power cable is run from the outdoor unit to FTC4 (Slave).
2. FTC4 (Slave) has independent power source
Note:
• Do not run the low voltage cables through a slot that the high voltage
cables go through.
• Bundle cables by using clamps as shown in the figure to the right .
Option 1: FTC4 (Slave) powered via outdoor unit
<1 phase>
Earth Wiring
Power
circuit
leakage
supply
breaker
circuit
~/N
or
breaker
230V
Isolating
*1
50Hz switch
*1 If the installed earth leakage circuit breaker does not have an over-current protection function, install a breaker with that function along the same power line.
Note: In accordance with IEE regulations the circuit breaker/isolating switch located on the outdoor unit should be installed with lockable devices (health and safety).
FTC4 (Slave) - Outdoor unit
FTC4 (Slave) - Outdoor unit earth
FTC4 (Slave) - Outdoor unit S1 - S2
FTC4 (Slave) - Outdoor unit S2 - S3
*1. A breaker with at least 3.0 mm contact separation in each pole shall be provided. Use earth leakage breaker (NV).
The breaker shall be provided to ensure disconnection of all active phase conductors of the supply.
*2. Max. 45 m
If 2.5 mm² used, Max. 50 m
If 2.5 mm² used and S3 separated, Max. 80 m
*3. The values given in the table above are not always measured against the ground value.
Notes: 1. Wiring size must comply with the applicable local and national codes.
2. FTC4 (Slave)/outdoor unit connecting cords shall not be lighter than polychloroprene sheathed flexible cord. (Design 60245 IEC 57)
FTC4 (Slave) power supply cords shall not be lighter than polychloroprene sheathed flexible cord. (Design 60227 IEC 53)
3. Install an earth longer than other cables.
FTC4 (Slave)
TB6
L
Outdoor unit
N
L
S1
S1
S2
N S2
S3
S3
<Fig. .3.4>
*2 3 × 1.5 (polar)
*2 1 × Min. 1.5
*3 230V AC
*3 24V DC
<Fig. .3.3>
Power
Earth
Wiring
supply
leakage
circuit
3N~
circuit breaker
400V
or
breaker
Isolating
50Hz
*1
switch
S1 S2 S3
L N
Low voltage cables (INPUT) &
Thermistor cables
High voltage cables (OUTPUT) &
Power cables
FTC4 (Slave)
TB6
L
Outdoor unit
N
L1
L2
S1
S1
L3
S2
S2
N
S3
S3
1