Manual MaxxHome AC7M - 20737 (page 8 of 24) (English)

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Portable Air-Conditioner

Model: 20737 - 20738

User’s Manual

（ ℃

）

Please read this user’s manual carefully to ensure proper use, maintenance and

installation

Contents

1. Safety Awareness ................................................................................................................... 1

2. Name of Parts ....................................................................................................................... 12

3. Accessories ........................................................................................................................... 12

4. Appearance and Function of Control Panel ....................................................................... 13

5. Appearance and Function of Remote Control ................................................................... 13

6. Operation Introduction ....................................................................................................... 14

7. Installation Explanations .................................................................................................... 16

8. Maintenance Explanations .................................................................................................. 18

9. Troubleshooting

................................................................................................................... 19

1. Safety Awareness

VERY IMPORTANT!

Please do not install or use your portable air conditioner before you have carefully read this

manual. Please keep this instruction manual for an eventual product warranty and for future

reference.

Warning

Do not use means to accelerate the defrosting process or to clean, other than those

recommended by the manufacturer.

The appliance shall be stored in a room without continuously operating ignition sources

(for example: open flames, an operating gas appliance or an operating electric heater.

Do not pierce or burn.

Be aware the refrigerants may not contain an odour.

Appliance shall be installed, operated and stored in a room with a floor area larger than X

m2.

MODEL X (m

)

5000Btu/h,7000Btu/h,8000Btu/h 4

9000Btu/h,10000Btu/h,10500Btu/h 12

12000Btu/h,14000,16000Btu/h,18000Btu/h 15

Specific information regarding appliances with R290 refrigerant gas.

• Thoroughly read all of the warnings.

• When defrosting and cleaning the appliance , do not use any tools other than those recommended

by the manufacturing company.

• The appliance must be placed in an area without any continuously sources of ignition (for example:

Warning (for R290)

1. Safety Awareness

open flames , gas or electrical appliances in operation).

• Do not puncture and do not burn.

• This appliance contains Y g (see rating label back of unit ) of R290 refrigerant gas.

• R290 is a refrigerant gas that complies with the European directives on the environment. Do not

puncture any part of the refrigerant circuit.

• If the appliance is installed, operated or stored in an unventilated area, the room must be designed

to prevent to the accumulation of refrigerant leaks resulting in a risk of fire or explosion due to

ignition of the refrigerant caused by electric heaters, stoves, or other sources of ignition.

• The appliance must be stored in such a way as to prevent mechanical failure.

• Individuals who operate or work on the refrigerant circuit must have the appropriate certification

issued by an accredited organization that ensures competence in handling refrigerants according to

a specific evaluation recognized by associations in the industry.

• Repairs must be performed based on the recommendation from the manufacturing company.

Maintenance and repairs that require the assistance of other qualified personnel must be performed

under the supervision of an individual specified in the use of flammable refrigerants.

1. The appliance is for indoor use only.

2. Do not use the unit on a socket under repairs or not installed properly

3. Do not use the unit, follow these precautions:

A: Near to source of fire.

B: An area where oil is likely to splash.

C: An area exposed to direct sunlight.

D: An area where water is likely to splash.

E: Near a bath, a laundry, a shower or a swimming pool.

4. Never insert your fingers, rods into the air outlet. Take special care to warn children of these

dangers.

5. Keep the unit upward while transport and storage, for the compressor locates properly.

6. Before cleaning the air-conditioner, always turn off or disconnect the power supply.

7. When moving the air-conditioner, always turn off and disconnect the power supply, and move it

General Safety Instruction

accordance with the room size within which the refrigerant containing parts are installed; the

ventilation machinery and outlets are operating adequately and are not obstructed; if an indirect

refrigerating circuit is being used, the secondary circuit shall be checked for the presence of

refrigerant; marking to the equipment continues to be visible and legible. Markings and signs that

are illegible shall be corrected; refrigeration pipe or components are installed in a position where

they are unlikely to be exposed to any substance which may corrode refrigerant containing

components, unless the components are constructed of materials which are inherently resistant to

being corroded or are suitably protected against being so corroded.

1.9 Checks to electrical devices

Repair and maintenance to electrical components shall include initial safety checks and

component inspection procedures. If a fault exists that could compromise safety, then no electrical

supply shall be connected to the circuit until it is satisfactorily dealt with. If the fault cannot be

corrected immediately but it is necessary to continue operation, an adequate temporary solution

shall be used. This shall be reported to the owner of the equipment so all parties are advised.

Initial safety checks shall include: that capacitors are discharged: this shall be done in a safe

manner to avoid possibility of sparking; that there no live electrical components and wiring are

exposed while charging, recovering or purging the system; that there is continuity of earth bonding.

2 REPAIRS TO SEALED COMPONENTS

2.1 During repairs to sealed components, all electrical supplies shall be disconnected from the

equipment being worked upon prior to any removal of sealed covers, etc. If it is absolutely

necessary to have an electrical supply to equipment during servicing, then a permanently

operating form of leak detection shall be located at the most critical point to warn of a potentially

hazardous situation.

2.2 Particular attention shall be paid to the following to ensure that by working on electrical

components, the casing is not altered in such a way that the level of protection is affected.

This shall include damage to cables, excessive number of connections, terminals not

made to original specification, damage to seals, incorrect fitting of glands, etc. Ensure that

apparatus is mounted securely. Ensure that seals or sealing materials have not degraded such

that they no longer serve the purpose of preventing the ingress of flammable atmospheres.

Replacement parts shall be in accordance with the manufacturer’s specifications.

NOTE The use of silicon sealant may inhibit the effectiveness of some types of leak detection

equipment. Intrinsically safe components do not have to be isolated prior to working on them.

3 REPAIR TO INTRINSICALLY SAFE COMPONENTS

Do not apply any permanent inductive or capacitance loads to the circuit without ensuring that

this will not exceed the permissible voltage and current permitted for the equipment in use.

Intrinsically safe components are the only types that can be worked on while live in the presence

of a flammable atmosphere. The test apparatus shall be at the correct rating. Replace

components only with parts specified by the manufacturer. Other parts may result in the ignition of

refrigerant in the atmosphere from a leak.

4 CABLING

Check that cabling will not be subject to wear, corrosion, excessive pressure, vibration, sharp

edges or any other adverse environmental effects. The check shall also take into account the

effects of aging or continual vibration from sources such as compressors or fans.

5 DETECTION OF FLAMMABLE REFRIGERANTS

Under no circumstances shall potential sources of ignition be used in the searching for or

detection of refrigerant leaks. A halide torch (or any other detector using a naked flame)

shall not be used.

6 LEAK DETECTION METHODS

The following leak detection methods are deemed acceptable for systems containing

flammable refrigerants. Electronic leak detectors shall be used to detect flammable refrigerants,

but the sensitivity may not be adequate, or may need recalibration. (Detection equipment shall be

calibrated in a refrigerant-free area.) Ensure that the detector is not a potential source of

ignition and is suitable for the refrigerant used. Leak detection equipment shall be set at a

percentage of the LFL of the refrigerant and shall be calibrated to the refrigerant employed and

the appropriate percentage of gas (25 % maximum) is confirmed. Leak detection fluids are

suitable for use with most refrigerants but the use of detergents containing chlorine shall be

avoided as the chlorine may react with the refrigerant and corrode the copper pipe-work. If a leak

is suspected, all naked flames shall be removed/extinguished. If a leakage of refrigerant is found

which requires brazing, all of the refrigerant shall be recovered from the system, or isolated (by

means of shut off valves) in a part of the system remote from the leak. Oxygen free nitrogen (OFN)

shall then be purged through the system both before and during the brazing process.

7 REMOVAL AND EVACUATION

When breaking into the refrigerant circuit to make repairs – or for any other purpose – con-

ventional procedures shall be used.However, it is important that best practice is followed

since flammability is a consideration. The following procedure shall be adhered to: remove

refrigerant; purge the circuit with inert gas; evacuate; purge again with inert gas; open the circuit

by cutting or brazing.The refrigerant charge shall be recovered into the correct recovery cylinders.

The system shall be “flushed” with OFN to render the unit safe. This process may need to be

repeated several times.Compressed air or oxygen shall not be used for this task. Flushing shall

be achieved by breaking the vacuum in the system with OFN and continuing to fill until the

working pressure is achieved, then venting to atmosphere, and finally pulling down to a vacuum.

This process shall be repeated until no refrigerant is within the system. When the final OFN

charge is used, the system shall be vented down to atmospheric pressure to enable work to take

place.This operation is absolutely vital if brazing operations on the pipework are to take place.

Ensure that the outlet for the vacuum pump is not close to any ignition sources and there is

ventilation available.

8 CHARGING PROCEDURES

In addition to conventional charging procedures,the following requirements shall be followed.

- Ensure that contamination of different refrigerants does not occur when using charging

equipment. Hoses or lines shall be as short as possible to minimise the amount of refrigerant

contained in them.

- Cylinders shall be kept upright.

- Ensure that the refrigeration system is earthed prior to charging the system with refrigerant.

- Label the system when charging is complete (if not already).

- Extreme care shall be taken not to overfill the refrigeration system.

Prior to recharging the system it shall be pressure tested with OFN. The system shall be leak

tested on completion of charging but prior to commissioning. A follow up leak test shall be

carried out prior to leaving the site.

9 DECOMMISSIONING

Before carrying out this procedure, it is essential that the technician is completely familiar

with the equipment and all its detail. It is recommended good practice that all refrigerants are

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MaxxHome AC7M - 20737 Manual

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