Mitsubishi Electric PAC-IF051B-E Installation Manual page 62

. Multiple outdoor units control
Option 2: FTC4 (Slave) powered by independent source
If FTC4 (Slave) and outdoor units have separate power supplies, the following re-
quirements MUST be carried out:
• Remove the short-circuited connector (CNS2) on FTC4 (Slave) (see <Fig. 9.3.5>.)
• Turn the outdoor unit DIP switch SW8-3 to ON
• Turn on the outdoor unit BEFORE the FTC4 (Slave).
<1 phase>
Power
Earth
supply
leakage
~/N
circuit
230V
breaker
50Hz
*1
Power
Earth Wiring
supply circuit
leakage
breaker
~/N
circuit
or
230V
breaker
Isolating
50Hz
switch
*1
*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.
*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.
Hydrobox
• For wiring as a slave controller (hydrobox) , refer to "4.5 Electrical Connection" in Hydrobox installation manual. *1
*1 Don't connect the power cable to the booster heater because it doesn't work in slave controller setting.
*2 Don't connect the main controller cable.
<Before system set up>
Insert the included SD memory card into the FTC4 control board. (Refer to section 4.9.)
2
FTC4 (Slave)
Wiring
circuit
breaker
N L
or
Isolating
N
switch
Outdoor unit
L S1
S1
N S2
S2
S3
S3
TB6
<
Fig. .3.>
FTC4 (Slave) power supply
FTC4 (Slave) input capacity
Main switch (Breaker)
FTC4 (Slave) power supply
FTC4 (Slave) power supply earth
FTC4 (Slave) - Outdoor unit
FTC4 (Slave) - Outdoor unit earth
FTC4 (Slave) L - N
FTC4 (Slave) - Outdoor unit S1 - S2
FTC4 (Slave) - Outdoor unit S2 - S3
CN108
FTC4 (Slave)
LED4
SW2
SW4
1
1
6
8
SW1
1
8
CNW12 CN21
(RED) (YLW)
TBIN 2
1 2 3 4 1
1 4 1 3
TBOUT
<Fig. .3.5>
<3 phase>
Power
Earth
supply
leakage
~/N
circuit
230V
breaker
50Hz
*1
Earth
Wiring
Power
leakage circuit
supply
breaker
circuit
3N~
or
breaker
400V
Isolating
50Hz *1
switch
~/N 230 V 50 Hz
*1 16 A
2 × Min. 1.5
1 × Min. 1.5
*2 2 × Min. 0.3
—
*3 230V AC
*3 —
*3 24V DC
LED1
Remove the short-circuited
LED3
connector (CNS2)
CNS2
(RED)
4 S1 S2 S3
3 1
3 L N
TB6
FTC4 (Slave)
Wiring
circuit
breaker
N L
or
Isolating
N
switch
Outdoor unit
L1
S1
S1
L2
S2
S2
L3
S3
S3
N
TB6