Mitsubishi Electric PMCR-50VHA-200D KIT Installation Manual page 8

3. System
Parts name
3-way valve Connect a 3-way valve via relay.
Current: 0.5A Max. , 10mA Min.
Power supply: 230V AC
Connect the surge absorber according to the load at site.
Flow switch It is required to protect system from the effects of insufficient flow.
Flow sensor It is required to detect an error in flow rate. (The operation is validated with SIKA VVX20.)
Strainer /Magnetic filter Provide it as required to protect parts from damages caused by iron particles/water/contamination (e.g. the position before pump and return part
(water circuit) from emitters).
Pressure relief valve It is required to protect system from reaching high pressure.
(Primary circuit side) Select the operating pressure depending on water pressure in the circuit in normal use.
(Sanitary water side) * Follow the national regulations.
Expansion Vessel (Primary circuit side)
Expansion Vessel (Sanitary water side)
Limits of TOTAL electric current when con-
necting field supply parts
4. Electrical work
INPUT
Remote controller
Thermistor
<1 phase>
Earth
Power breaker
leakage
supply
circuit
Isolating
~/N
breaker
230V
50Hz
<3 phase>
Power
Earth
supply
leakage breaker
3N~
circuit
Isolating
400V breaker
50Hz
Electrical connections 1 phase/3 phase
en
FTC2BR - Outdoor unit
FTC2BR - Outdoor unit earth
FTC2BR - Outdoor unit S1 - S2
FTC2BR - Outdoor unit S2 - S3
EN-8
When the water circuit is closed, select the expansion vessel according to water quantity of the water circuit.
* Follow the national regulations.
(Power supply from outdoor unit)
TOTAL current requirement MUST be
CN401
(WH)
CN1A
(WH)
CNS2
(RD)
OUTPUT Power cables
<Fig. 4.1.1>
Wiring for FTC2BR
Outdoor unit
Wiring
circuit
L
S1
or
N S2
switch
S3
TB6
Outdoor unit
L1
Wiring
circuit
L2
or S1 S1
L3
S2 S2
switch
N
S3 S3
TB6
<Fig. 4.1.2>
*2 3 × 1.5 (polar)
*2 1 × Min. 1.5
*3 230V AC
*3 24V DC
Requirement
3A (otherwise, the fuse on the outdoor unit PCB will blow).
4.1. Electrical connection
All electrical work should be carried out by a suitably qualified technician. Failure
to comply with this could lead to electrocution, fire, and death. It will also invalidate
product warranty. All wiring should be according to national wiring regulations.
Connections should be made to the terminals indicated in the following figures de-
pending on the phase.
When the wires are wired to adjacent terminals use ring terminals and insu-
late the wires.
Notes:
1. Do not run the low voltage cables through a slot that the high voltage
cables go through.
2. Do not bundle power cables together with other cables.
3. Bundle cables as Fig. 4.1.1 by using clamps.
FTC2BR Option 1: FTC2BR powered via outdoor unit
*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.
L
*2 Affix label A that is included with the manuals near each wiring diagram for
N
FTC2BR and outdoor units.
To control
Note:
S1
board
In accordance with IEE regulations the circuit breaker/isolating switch located on
S2
the outdoor unit should be installed with lockable devices (health and safety).
S3
FTC2BR
L
N
To control
board
*1. A breaker with at least 3.0 mm contact separation in each pole shall be pro-
vided. Use earth leakage breaker (NV).
The breaker shall be provided to ensure disconnection of all active phase con-
ductors 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. FTC2BR/outdoor unit connecting cords shall not be lighter than polychlo-
roprene sheathed flexible cord. (Design 60245 IEC 57)
3. Install an earth longer than other cables.