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Electrical Connection
4.1 Electrical Connection Precautions
■ The following safety rules and measures must be strictly observed before switching on the circuit:
1. When the unit is installed, it must be completed by the manufacturer's service personnel or specially
trained installers. Installation should comply with the relevant electrical, construction, environmental
protection and other laws and regulations, standards and product installation instructions issued by the
state and local governments. Users must not remove and add control components privately. Haier
Company shall not be liable for any damage to the unit and personal injury caused by failure to operate
in accordance with these Rules.
2. Please refer to "Electrical Connection" for circuit connection. Each machine is equipped with a wiring
diagram, and the wiring diagram is placed inside the control box.
3. The grounding wire of the air conditioner should have a good grounding. Do not connect to gas pipes,
water pipes, telephone lines, and poor grounding can cause electric shock.
4. Check if the power supply meets the requirements before starting the machine.
■ Unit power cord connection diagram
There must be a sufficient capacity of the circuit breaker at the power incoming line. The circuit breaker
needs to have short-circuit and ground fault protection, and the device has a contact distance of at least
3mm. Please install it yourself.
4.2 Electric control
■ Control of auxiliary electric heating
The start of electrical heating is to provide an auxiliary heating function at low temperatures. The
inlet and outlet of the auxiliary electric heating are connected in series to the total outlet pipe of the
air-cooling module unit, and the control node for auxiliary electric heating is provided in the electric
control cabinet of the main module of the unit (only 220V output control signal is provided, and the
electric heating control part is provided by the user).
◆ Selection of auxiliary electric heater
According to the needs of the project, it is recommended to install an auxiliary electric heater as the
backup system. When the equipment is frosted or the equipment has temporary failure, it will be opened
as a backup system. The main consideration of the selection of the water temperature auxiliary electric
heater for the unit is: the winter outdoor minimum Average ambient temperature, the size of the capacity
used for the backup system. According to the local minimum winter ambient temperature and the unit's
outlet water temperature, the corresponding capability value Q1 can be found in the "performance
correction curve". Compared with the unit nominal value Q, the unit capacity attenuation value Q2 can
be obtained.
Generally choose the auxiliary electric heater ability W
Where a is the margin coefficient, the value range is 1.0~1.5, and the value of a in the northern region
should be larger, such as 1.5 in Hubei and north.
WARNING
Q2=Q- Q1
W=a* Q2=a*(Q- Q1).
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