Gree ULTRA heating GMV5 Multi VRF Series Service Manual page 57

5) Connect the unit to specialized grounding device and make sure it is securely grounded. It's a must to
install air switch and current circuit breaker that can cut off the power of the entire system. The air switch
should include magnetic trip function and thermal trip function so that system can be protected from short
circuit and overload.
6) Air conditioner belongs to class I electrical appliance, so it must be securely grounded.
7) The yellow-green wire inside the unit is a ground wire. Do not cut it off or secure it with tapping screws,
otherwise it will lead to electric shock.
8) Power supply must include secure grounding terminal. Do not connect the ground wire to the following:
Water pipe；Gas pipe；Drain pipe；Other places that are deemed as not secure by professional
technicians.
9.1Wiring Diagram
1) Connection of power cord and communication wire
Separate power supply for Indoor and Outdoor
C ommunication wire
between IDU and ODU
D1
D2
ODU
G1
G2
G
L1 L2
Remote
monitor
Power
2) The wiring diagram for power cord of outdoor unit and communication wire.
There are two wiring diagrams for communication wires of indoor/outdoor units and remote monitor:
(1) Real line method;
(2) Broken line method. Please select it based on the actual installation situation.
There are two wiring diagrams for power cord:
(1) Real line method;
(2) Broken line method. Please select it based on the actual installation situation.
Communication wire of IDU
D1
D2
H1
H2
G
L1 L2
Wired
controller
Power
Communication wire of IDU
D1
D2
H1
H2
G
L1 L2
Wired
controller
Power
Ultra Heating GMV5 Multi VRF
for North America
Wire
(resistance-matching )
D1
D2
H1
H2
G
L1 L2
Wired
controller
Power
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