Ftc (Master) Powered By Independent Source - Mitsubishi Electric PAC-IF061B-E Installation And Operation Manual

4. Electrical work
Option 2: FTC (Master) powered by independent source
If FTC (Master) and outdoor units have separate power supplies, the following
requirements MUST be carried out:
• FTC (Master) unit electrical box connector connections changed. (see
Fig. 4.1.3)
• Outdoor unit DIP switch settings changed to SW8-3 ON.
• Turn on the outdoor unit before the FTC (Master).
• Power by independent source is not available for particular models of
outdoor unit model.
For more detail, refer to the connecting outdoor unit installation manual.
Clamps
Clamps
Clamps
1 2 3 4
<Fig. 4.1.4> Wiring for PAC-IF062/063B-E
Notes: 1. D o not run the low voltage cables through a slot that the high voltage cables go through.
2. D o not run other cables except low voltage cables through a slot that the wireless receiver's cable goes through.
3. D o not bundle power cables together with other cables.
4. B undle cables as figure above by using clamps.
<1 phase>
Earth
leakage
Power
circuit
supply
breaker
~/N
230V
50Hz
Earth
Wiring
circuit
leakage
Power
breaker
circuit
supply
or
breaker
~/N
Isolating
*1
230V switch
50Hz
Power
supply
*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.
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.
Note: I n accordance with IEE regulations the circuit breaker/isolating switch located on the outdoor unit should be installed with lockable devices (health and safety).
FTC (Master) power supply
FTC (Master) input capacity
Main switch (Breaker)
FTC (Master) power supply
FTC (Master) power supply earth
FTC (Master) - Outdoor unit
FTC (Master) - Outdoor unit earth
FTC (Master) L - N
FTC (Master) - Outdoor unit S1 - S2
FTC (Master) - Outdoor unit S2 - S3
TB2
TB1
Clamps 1
2
Slot
3
4
5
5
FTC (Master)
TB2
Wiring
circuit
breaker
L
or
N
Isolating
*1
switch
Outdoor unit
TB1
L S1
S1
To control
S2
N
S2
board
S3
S3
ECB
Wiring
ELB for
circuit
breaker immersion
L
or
heater
N
Isolating
(DHW tank)
switch
Electrical connections 1 phase/3 phase
~/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
Initial settings
(Power supplied
by outdoor unit)
Modified settings
(Separate power
supply to
FTC(Master))
High voltage cables (OUTPUT)
High voltage cables (OUTPUT)
Low voltage cables (INPUT) and
wireless receiver's cable
Thermistor cables
Power cables
<3 phase>
Power
supply
~/N
230V
50Hz
Earth
Power
leakage
supply
circuit
3N~
breaker
400V
*1
50Hz
<Fig. 4.1.5>
*2. Max. 120 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. FTC (Master) unit/outdoor unit connecting cords shall not be lighter
than polychloroprene sheathed flexible cord. (Design 60245 IEC 57)
FTC (Master) unit power supply cords shall not be lighter than
polychloroprene sheathed flexible cord. (Design 60227 IEC 53)
3. Install an earth longer than other cables.
4. Please keep enough output capacity of power supply for each individual
heater. Insufficient power supply capacity might cause chattering.
L
N
White
CNO1
S1
S2
(Master)
S3
L
N
White
CNO1
S1
S2 (Master)
S3
<Fig. 4.1.3>
TB2
Earth Wiring
circuit
leakage
breaker
circuit
or
breaker
Isolating
*1
switch
Outdoor unit
TB1
L1
Wiring
S1
S1
circuit
L2
breaker
S2
S2
or
L3
S3
Isolating
S3
N
switch
ECB
Wiring
circuit
breaker
Power or
Isolating
supply
switch
: PAC-IF061B-E
: PAC-IF062/063B-E
FTC
FTC
FTC (Master)
L
N
To control
board
ELB for
L immersion
heater
N
(DHW tank)
13