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Split Inverter Air-to-Water Heat Pump
Attention
All electrical installation and wiring must be in accordance with the National Electrical Code ANSI/NFPA No. 70-latest edition and any
additional state or local code requirements. Failure to comply will void the warranty and potentially cause serious injury and/or damage
to the installed products. Please follow wiring diagrams and associated wiring connection diagrams.
Figure 3.12 Power Supply Connection Diagram
Indoor unit and outdoor units must be powered by separate circuits, each protected by fuses or circuit breakers not exceeding the values
posted on the data plate.
Figure 3.13 RS485 Communication Cable (attached to lineset provided with unit)
Electrical Installation
35
Installation Instructions
1
2
3
Electrical Installation
(1) All electrical installations must be carried out by professionals in accordance with local laws and
regulations, national wiring rules and unit specifications.
(2) The unit is Class I electrical device and must be properly grounded. The grounding wire is a
yellow-green bicolor wire that cannot be used for other purposes. Do not cut it short. Do not use
self-tapping screws. Do not connect it with gas pipes, water pipes, lightning protection devices,
telephone lines, and other places where professionals believe are unreliable. Improper grounding
methods may cause electric shocks; they should be installed by professionals on the special
grounding device of a building. The grounding resistance should comply with national standards.
(3) The unit should use a special circuit. According to the state's technical standards for electrical
equipment, the fixed line must have enough air switches and leakage protection switches, wherein
the air switch should have magnetic tripping and thermal tripping functions, combined with short
circuit and overload protection. Set a leakage protection device in the external electrical cabinet of
the unit, and the electrical parts must be protected from moisture. Otherwise it may cause electric
shock, fire and other accidents.
(4) Connect the power supply properly. Connection of the power supply line must be firm, but it shall
not be pulled too tightly. Otherwise, the cable may break or fall off, resulting in fire or other
accidents.
(5) Strong and weak electrical wiring should be routed separately and cannot interfere with each other.
It is not permitted to connect multiple wires in parallel. The wire must not contact heat-generating,
movable parts such as refrigerant piping, compressors, and fans.
(6) The fuse type and rating of the controller are based on the silkscreen identification on the
corresponding controller or fuse bushing.
(7) The voltage fluctuation range of the unit shall not exceed ±10% of the rated value.
(8) After all wiring works are completed, carefully check and confirm there are no errors before
connecting the power supply. After installation, the user is not allowed to remove and add any
components at will.
(9) The minimum clearance between the unit and the combustible surface is 1.5 meters.
(10) The method of connection between the unit and the power cord and the method of interconnection
of independent components shall be based on the accompanying circuit diagram.
Single phase power supply connection diagram:
Three phase power supply
connection diagram:
Yellow green
Yellow green
Red Blue
Red Black White Blue
Connect to power
supply
220V~/50Hz
(
2
)
STP cable diagram:
Connect to
power supply
380V/3N~/50Hz
Attentions
Power
supply
connection
diagram
Communication
cable connection
diagram