124
Graphical representation for wiring
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 first valve box (VP 1).
To power supply
1PH,220-230V~,
50/60Hz
Rated
Current
of
Overflow
Breaker
communication wire with polarity
The communication wire of valve
boxes and outdoor units as well as
between valve boxes with non-polar.
Outdoor 1
Indoor 1
VP 1
VP 2
VP 3
Indoor 2
Indoor 3
Indoor 4
Indoor 5
Indoor 6
Outdoor 2
Outdoor 3
B
P Q
P Q
A
L N
C
B
C
B
A C
B
A C
B
Outdoor
wired
controller
wired
controller
wired
controller
wired
controller
wired
controller
Indoor
PQ
P Q
L N
L N
C
B
C
B
Outdoor
Outdoor
Indoor
Indoor
P QA C
B
A B C
A B C
A B C
A B C
A B C
A B C
P QA C
B
P QA C
B
P QA C
B
P QA C
B
P QA C
B
Cooling and Heating indoor units simultaneous
Cooling-only indoor unit
Notes:
(1) The above wiring example is only for reference. The number of valve boxs and indoor units shall be subject to
the field 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.
(3) Two-core nonpolar communication line with shield shall be adopted for communication lines between the valve
box and the indoor/outdoor unit. Three-core polar communication line with distinguished polarities and shield
shall be adopted for the wire controller connected to the indoor unit.
(4) All valve boxes within one system may share one overcurrent breaker for power supply. But it’s necessary to
compute total current capacity specification.
(5) For wring harness connected to the power terminal block, the terminal shall be pressed with a round (refer to
the following figure).
1) The power terminal block shall not be crimped with 2 wires of different diameters. Otherwise, poor crimp
connection and looseness may lead to abnormal heating or sparking of the line.
2) Refer to the following figure for crimping wires with the same diameter.
Wire
Insulating sleeve
Round. Press the terminal
Connect wires with the
same diameter on both
sides
It’s forbidden to connect
two wires on one side
Wires with different
diameters are not allowed
Summary of Contents for MRV 5-RC AB052MAERA
Page 1: ...MRV 5 RC Service Manual SYJS 03 2019REV A Edition 2019 03 ...
Page 3: ......
Page 55: ...52 AV08 10 12 14IMVURA 4 Center of gravity x X 347 9587 y 471 5454 z 725 6683 y z ...
Page 56: ...53 AV16 18 20 22IMVURA x X 650 5962 y 380 7255 z 706 5342 y z ...
Page 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 ...
Page 116: ...113 2 Preparation before installation ...
Page 162: ...159 One by one valve box PCB code 0151800186A 2 Valve box PCB photo and dip switch setting ...
Page 165: ...162 One by four valve box PCB code 0151800466 ...