Haier MRV5-H - Page 260

257
The wiring for the power line and signal line of valve box
Graphical representation for wiring
The wiring for the power line of valve box, the wiring for the signal line between valve boxes and outdoor units as
well as the wiring between valve boxes.
Items
Total
Current
of valve
boxes (A)
Cross
Section
(mm
2
)
Rated
Current of
Overow
Breaker (A)
Rated Current of Power Leakage
Breaker (A)
Leaking Current (mA)
Operating Period (S)
Cross Sectional Area of Signal Line
Outdoor-valve
box (mm
2
)
Valve box-valve
box (mm
2
)
<15 6(2.5) 15 15A, 30mA, 0.1S or below 2cores ×0.75-2.0 mm
2
shielded line
• Power cable and communication wire must be xed rmly.
• Each valve box must be earthed well.
• When power cable exceeds the range, thicken it appropriately.
• Shielded layer of communication wires must be connected together and be earthed at single
point.
• Communication wire total length cannot exceed 1000m.
Connect the communication terminal block P and Q of the main unit of the outdoor units with the communication
terminal block P and Q of the rst valve box (VP 1).
P
Q
B
C
L
N
L
N
P
Q
A
B
C
A
B
C
C1
C2
P1Q1
P
2Q2P3Q 3P4Q4
PQ
AB
C
AB
C
PQ
A
B
C
AB
C
PQ AB C
A
B
C
PQ AB C
A
B
C
L
N
PQ AB C
PQ
A
B
C
Indoor 9
AB
C
wired
controller
wired
controller
A
B
C
Outdoor 1
Indoor 1
wired
controller
wired
controller
Indoor 2
VP 1
P Q A BC
Outdoor 2 Outdoor 3
VP4-560B
VP 3
Indoor 1-4
Indoor 8
To power supply
1PH,220-230V~,
50/60Hz
Rated Current
of Overow
Breaker
Outdoor Indoor
communication wire with polarity
The communication wire of valve boxes and
outdoor units as well as between valve boxes with
non-polar.
Cooling and Heating are Optional Indoors
Just Cooling Indoors
A B C
A B C
B
P Q A BC PQA BC
A BC
ABC
Outdoor
Outdoor Indoor
P Q B C
Indoor 4
Indoor 3 Indoor 6
Indoor 5
wired
controller
wired
controller
wired
controller
wired
controller
Indoor 7
wired
controller
Notes:
(1) The above wiring example is only for reference. The number of valve boxs and indoor units
shall be subject to the eld installation.
(2) Communication line from cooling-only indoor unit may be connected to the communication
terminal block P and Q (outdoor) of the valve box.