Manual Haier New Column (page 3 of 75) (English)

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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.

b) The leak detection equipment of refrigerant shall be placed at a low position in the

outdoor, and shall be opened.

1) Fixation

The support of the outdoor unit shall be fixed onto the wall surface, and then the outdoor unit shall be fixed onto

the support horizontally. In case the outdoor unit is wall-mounted or roof-mounted, the support shall be firmly

fixed, to avoid the damage of strong wind.

2) Installation of connecting pipes

The cone of the connecting pipes shall be aligned with the conical surface of corresponding valve connector.

The nut of connecting pipes shall be installed at a proper position and then be tightened with a spanner. Excessive

tightening torque shall be avoided, or otherwise the nut may be damaged.

Vacuumizing

A digital vacuum gauge shall be connected for vacuumizing. The duration of vacuumizing shall be at least 15

minutes, and the pressure of the vacuum gauge shall be below 60Pa.Afterwards, the vacuumizing equipment shall

be closed, and whether the reading of the digital vacuum gauge is increased or not shall be observed after the

pressure is maintained for 5 minutes. In case no leakage is identified, the two-way stop valve and three-way stop

valve of the outdoor unit may be opened. Finally, the vacuumizing hose connected to the outdoor unit can be

disassembled.

Leak Detection

The joint of connecting pipes for the outdoor unit shall be subject to leak detection with soap bubble or

dedicated leak detection equipment.

Post-installation Inspection Items and Test Run

Post-installation Inspection Items

qesnoC dekcehC eB ot smetI uence of Imprope r Installation

Whether the installation is firm or not The unit may fall, vibrate or make a noise

Whether the inspection on air leakage is completed The refrigerating capacity (heating capacity) may be

insufficient

Whether the unit is fully insulated Condensation or drip may occur

Whether the drainage is smooth or not Condensation or drip may occur

Whether the power voltage is identical to that

marked on the nameplate

Failure may occur or the parts may be burned

Whether the circuit and pipeline are installed

correctly

Failure may occur or the parts may be burned

Whether the unit is safely earthed Electric leakage may occur

Whether the type of wire is in line with relevant

regulations

Failure may occur or the parts may be burned

Whether barriers are identified at the air inlet/outlet

of the indoor/outdoor unit

The refrigerating capacity (heating capacity) may be

insufficient

Whether the length of refrigerant pipes and the

refrigerant amount charged are recorded

The refrigerant amount charged cannot be confirmed

Test Run

1. Preparations

(1) Power on is not allowed before all the installation operations are completed and before the leak

detection is proven qualified.

(2) The control circuit shall be connected correctly and all the wire s shall be firmly connected.

(3) The two-way stop valve and three-way stop valve shall be opened.

(4) All the scattered articles (especially the metal filing and thread residue) shall be removed from the unit

body.

2. Methods

(1) Switch on the power supply and press the “ON/OFF” on the remote controller, after which the air

conditioner will start operating.

(2) Press “Mode” to select refrigeration, heating and sweeping wind, and observe whether the air

conditioner is under normal operation.

Relocation Procedures

Note: in case relocation is required, the joint of evaporator gas/liquid pipes of the indoor unit shall be cut off with

a cutting knife. Connection is only allowed after re-flaring (the same to the outdoor unit).

Maintenance Instructions

Maintenance Precautions

Precautions

For all the faults requiring welding the refrigeration pipelines or components inside the refrigeration system

of R32 refrigerant air conditioners, maintenance at the user’s site is never allowed.

For the faults requiring radical disassembly and bending operation of the heat exchanger, such as the

replacement of the outdoor unit chassis and integral disassembly of the condenser, inspection and maintenance at

the user’s site are never allowed.

For the faults requiring replacement of the compressor or parts & components of refrigeration system,

maintenance at the user’s site is not allowed.

For other faults not involved in the refrigerant container, interna l refrigeration pipelines and refrigeration

elements, the maintenance at the user’s site is allowed, including the cleaning and dredging of the refrigeration

system requiring no disassembly of refrigeration elements and no welding.

In case replacement of gas/liquid pipes is required during maintenance, the joint of evaporator gas/liquid

pipes of the indoor unit shall be cut off with a cutting knife. Connection is only allowed after re-flaring (the same

to the outdoor unit).

Qualification Requirements of Maintenance Personnel

1. All the operators or the maintenance personnel involved in refrigerating circuits shall be provided with the

effective certificate issued by an industry-accepted assessment institute, to ensure that they are qualified for safety

disposal of refrigerant as required in the assessment regulations.

2. The equipment c an only be maintained and repaired as per the method recommended by the manufacturer.

In case the assistance from personnel of other disciplines is required, the assistance shall be supervised by the

personnel with qualification certificate involved in flammable refrigerant.

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Haier New Column Manual

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