Haier DW-150W200 Preparations and Operation Procedures, Preparations before use, Commissioning

Preparations and Operation Procedures

When handling, it is strictly forbidden to overturn (upside down) the freezer; never allow its angle of inclination over 45° to avoid oil spill onto the system pipeline.

Note: If the freezer is excessively inclined or upside down, compressor oil would spill onto the system pipeline, resulting in inadequate compressor oil. Further, inadequate compressor oil leads to insufficient lubrication, which results in noise from compressor, even agglutination of piston and cylinder inner wall, damage to compressor motor.

Preparations before use

When unpacking, all the packing materials (including base) should be removed.

All the packing materials removed should be kept in a safe place and not thrown away before completing the commissioning. Only when the freezer is accepted after commissioning can you throw them away or destroy them to avoid inconvenience in commissioning or fault handling.

Unpack the freezer with even force to prevent damage to the freezer or personal injury. After unpacking, first clean the freezer as described in the Section “Care and Maintenance”.

The freezer should be installed horizontally in a well-ventilated place where the room temperature is below 27℃. The castors should be leveled and locked; otherwise noise and vibration may occur.

To ensure no noise and vibration during running, please check:

1.Whether the ground of installation location is flat.

2.Whether all the castors are leveled and closely contact with the ground.

Please install 380V/50Hz (3-phase live wire, single-phase null line, single-phase earth wire) or 220V/50Hz (single-phase live wire/null line/earth wire) power supply strictly following the requirements specified in the product’s label, and have qualified installation personnel carry out wiring. Note: the capacity of distribution system must be higher than the rated capacity of freezer and the freezer must be reliably grounded.

It is strictly forbidden to connect earth wire and null line; otherwise the freezer may be electrified and cause personal injury.

To prevent the freezer from being affected by voltage fluctuation, please install a voltage stabilizer, the capacity of which should be higher than the rated capacity of freezer.

Commissioning

After finishing installation, be sure to leave the freezer still for over 24 hours before turning it on in order to ensure complete oil return.

If the freezer is moved, only after leaving it still for 24 hours can perform any operation.

In case of handling, if the freezer is energized before reaching stable state, the following problems may occur:

1.It causes the symptom of compressor being lack of oil, resulting in noise produced by metal friction or knock;

2.It causes the symptom of agglutination between piston and cylinder inner wall, resulting in damage to compressor.

Before turning on the freezer, check the power supply for input voltage/power 380V/50Hz or 220V/50Hz with a test pencil or a voltmeter, and check the earth wire for reliable grounding.

Turn on the freezer, cool down in the sequence of -126℃, -135℃and minimum (target) operating temperature as described in the Section “Temperature Setting”, and the commissioning is completed once it works normally at minimum operating temperature. It is required to record the time of commissioning and corresponding temperature in details in the process of test.

After completing commissioning, the results must be mutually confirmed by commissioning engineers and the user, and then put on file.

7-24