123
Warning
Attention
• Electrical construction should be made with specific mains circuit by the qualified personnel according to the
installation instruction. Electric shock and fire may be caused if the capacity of power supply is not sufficient.
• During arranging the wiring layout, specified cables should be used as the mains line, which accords with the
local regulations on wiring. Connecting and fastening should be performed reliably to avoid the external force of
cables from transmitting to the terminals. Improper connection or fastness may lead to burning or fire accidents.
•
There must be the ground connection according to the criterion. Unreliable grounding may cause electrical
shocks. Do not connect the grounding line to the gas pipe, water pipe, lightening rod and telephone line.
• Only copper wire can be used. Breaker for electric leakage should be provided, or electric shock may occur.
•
The wiring of the mains line is of Y type. The power plug L should be connected to the live wire and plug N
connected to null wire while should be connected to the ground wire. For the type with auxiliary electrically
heating function, the live wire and the null wire should not be misconnected, or the surface of electrical heating
body will be electrified. If the power line is damaged, replace it by the professional personnel of the manufacturer
or service center.
•
The power line of valve boxes should be arranged according to the installation instruction of valve boxes.
•
The electrical wiring should be out of contact with the high-temperature sections of tubing as to avoid melting the
insulating layer of cables, which may cause accidents.
• After connected to the terminal tier, the tubing should be curved into be a U-type elbow and fastened with the
pressing clip.
• Controller wiring and refrigerant tubing can be arranged and fixed together.
•
The machine can't be powered on before electrical operation. Maintenance should be done while the power is
shut down.
•
Seal the thread hole with heat insulating materials to avoid condensation.
• Signal line and power line are separately independent, which can't share one line. [Note: the power line, signal
line are provided by users. Parameters for power lines are shown as below: 3×(1.0-1.5) mm
2
; parameters for
signal line: 2×(0.75-1.25)mm
2
( shielded line)]
•
Valve boxes and outdoor units should be connected to the power source separately. All valve boxes must share
one single electrical source, but its capacity and specifications should be calculated. Indoor & outdoor units
should be equipped with the power leakage breaker and the overflow breaker.
• Valve box can be installed in multiple, named as unit A, unit B…. Pay attention to the marks on the terminal block
when connecting the outdoor unit with the indoor unit. Refer to wiring example as described in 5-2 while ensuring
correct connection. In addition, the operation will be abnormal when the wiring and the tubing between indoor and
outdoor machine sets are installed in different refrigerant systems.
• Energization is not to be done before it’s confirmed that the valve box have completely installed and that the
outdoor and indoor installation is completed.
The wiring for the power line and signal line of valve box
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
)
Length
(m)
Rated
Current of
Overflow
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
)
<10
2
20
20
20A,30mA,0.1S or below
2cores ×0.75-2.0 mm
2
shielded line
≥10 and <15
3.5
25
30
30A,30mA, 0.1S or below
≥15 and <22
5.5
30
40
40A,30mA, 0.1S or below
≥22 and <27
10
40
50
50A,30mA, 0.1S or below
• Power cable and communication wire must be fixed firmly.
•
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.
Содержание MRV 5-RC VP1-112B
Страница 1: ...MRV 5 RC Service Manual SYJS 03 2019REV A Edition 2019 03 ...
Страница 3: ......
Страница 55: ...52 AV08 10 12 14IMVURA 4 Center of gravity x X 347 9587 y 471 5454 z 725 6683 y z ...
Страница 56: ...53 AV16 18 20 22IMVURA x X 650 5962 y 380 7255 z 706 5342 y z ...
Страница 106: ...103 2 Dimension 4 19 200 60 25 25 25 249 108 232 84 69 388 73 82 65 103 177 4 44 4 35 277 ...
Страница 116: ...113 2 Preparation before installation ...
Страница 130: ...127 2 Dimension 290 67 410 220 567 137 160 189 57 144 109 159 159 212 393 4 22 65 65 65 65 65 44 65 76 4 52 67 156 830 ...
Страница 162: ...159 One by one valve box PCB code 0151800186A 2 Valve box PCB photo and dip switch setting ...
Страница 165: ...162 One by four valve box PCB code 0151800466 ...