INVENTOR DR2VI32-09WFI Benutzer- & Installationshandbuch Seite 8

6.In case the product is damaged, it must be delivered to the maintenance point. Welding of refrigerant pipelines at the
user's site is not allowed.
7.The installation position of air conditioner shall be convenient for installation or maintenance. Barriers shall be avoided
around the air inlet/outlet of the indoor/outdoor unit, and the electrical appliance, power switches, sockets, valuables and
high-temperature products within the scope of both sidelines of the indoor unit shall be avoided.
●Electrical Safety Requirements
Note:
1.The surrounding conditions (ambient temperature, direct sunlight and rainwater) shall be noticed during electrical wiring,
with effective protective measures being taken.
2.Copper wire cable in line with local standards shall be used as the power line and connector wire.
3.Both the indoor unit and outdoor unit shall be reliably earthed.
4.Wiring for the outdoor unit shall be made first and then the indoor unit. The air conditioner can only be powered on after
wiring and pipe connection.
5.The dedicated branch circuit must be used, and leakage protector with sufficient capacity must be installed.
●Qualification Requirements of Installer
Relevant qualification certificate must be obtained as per national laws and regulations.
●Indoor Unit Installation
1. Fixation of wall panel and piping layout
In case of left/right water pipe connection for the indoor unit, or in case the evaporator interface of the indoor unit and
the horn mouth of the connecting piping cannot be extended to the outdoor side for installation, the connector pipes shall
be connected to the evaporator piping interface of the indoor unit in the process of horn mouth.
2. Piping layout
During layout of connecting pipes, drain hose and connector wires, the drain hose and connecting wire shall be placed
at the bottom and top respectively. The power line cannot be twined with the connector wire. The drain pipes (especially
inside the room and machine) must be winded with thermal insulation materials.
3. Nitrogen charging for pressure maintaining and leak detection
After the evaporator of the indoor unit is connected to the connector pipe (after welding), nitrogen more than 4.0MPa
shall be charged inside the evaporator and the piping connected to evaporator with a nitrogen cylinder (adjusted by a
reducing valve). Afterwards, the valve of the nitrogen cylinder shall be closed, for leak detection with soapy water or leak
detecting solution. The pressure shall be maintained for more than 5 minutes, and then whether the system pressure
is reduced or not shall be observed. In case the pressure is reduced, leakage can be identified. After the leak point is
handled, the steps above shall be repeated.
After the evaporator of the indoor unit is connected to connecting piping, nitrogen shall be charged for pressure
maintaining and leak detection. Afterwards, the evaporator shall be connected to the two-way stop valve and three-way
stop valve of the outdoor unit. After the copper cap of the connecting piping is fastened, nitrogen more than 4.0MPa shall
be charged at the access hole of the three-way stop valve with a charging hose. The valve of the nitrogen cylinder shall
be closed, for leak detection with soapy water or leak detecting solution. The pressure shall be maintained for more than
5 minutes, and then whether the system pressure is reduced or not shall be observed. In case the pressure is reduced,
leakage can be identified. After the leak point is handled, the steps above shall be repeated.
The operation above can also be completed after the indoor unit is connected to the connecting pipelines and the two-
way stop valve and three-way stop valve of the outdoor unit, after the access hole of the outdoor unit is connected to the
nitrogen cylinder and pressure gauge and after more than 4.0MPa nitrogen is charged. No leak points are identified in the
leak detection at the joint/welding junction of the indoor unit and at the joint of connecting pipelines of the two-way stop
valve and three-way stop valve of the outdoor unit. It must be guaranteed that each joint is available for leak detection
during installation.
The next step (vacuumizing with a vacuum pump) can only be continued after the installation
steps (nitrogen charging for pressure maintaining and leak detection normal) are completed.
●Outdoor Unit Installation
1. Fixation and connection
Note:
a)Fire source shall be avoided within 3m around the place of installation.
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