This document serves as an Owner's Manual for Cooper & Hunter Split Type Wall-mounted Air Conditioners, specifically covering models CHML-U14RK2, CHML-U18RK2, CHML-U21RK3, CHML-U24RK3, CHML-U28RK4, CHML-U36RK4, and CHML-U42RK5. It provides essential information for the proper operation, installation, and maintenance of these units. The manual emphasizes safety precautions and compliance with relevant regulations, particularly concerning the use of R32 flammable refrigerant.
Function Description
The Cooper & Hunter Split Type Wall-mounted Air Conditioner is designed to provide cooling and heating (for heat pump models) for indoor spaces. It utilizes a special refrigerant, R32, which circulates within the system to achieve its thermodynamic functions. R32 is highlighted as a non-polluting refrigerant with low environmental impact and high energy efficiency. The system is designed for wall-mounted indoor units paired with an outdoor unit, facilitating climate control in various settings. The manual details electrical connections and piping requirements for multi-split systems, indicating that multiple indoor units can be connected to a single outdoor unit, depending on the model.
Usage Features
The manual outlines several key aspects related to the safe and effective use of the air conditioner. It stresses the importance of reading the manual carefully before operation and keeping it for future consultation. Users are advised to only use the air conditioner as instructed and to exercise common sense and caution.
Safety Warnings for Operation:
- The appliance can be used by children aged 8 and above, and persons with reduced physical, sensory, or mental capabilities, provided they are supervised or instructed on safe use and understand the hazards. Children should not play with the appliance, and cleaning/maintenance should not be performed by unsupervised children.
- Do not connect the air conditioner to a multi-purpose socket to avoid fire hazards.
- Always disconnect the power supply before cleaning to prevent electric shock.
- The supply cord, if damaged, must be replaced by the manufacturer, its service agent, or similarly qualified persons.
- Do not wash the air conditioner with water or spray water on the indoor unit to prevent electric shock or malfunction.
- Avoid touching fins after removing the filter to prevent injury.
- Do not use fire or a hair dryer to dry the filter, as this can cause deformation or fire.
- Maintenance and repairs must be performed by qualified professionals. Do not attempt to repair the air conditioner yourself.
- Do not insert fingers or objects into the air inlet or outlet to prevent personal injury or damage.
- Do not block the air outlet or inlet to avoid malfunction.
- Avoid spilling water on the remote controller to prevent damage.
- In case of abnormal phenomena (overheating/damaged power cord, abnormal sound, frequent circuit breaker trips, burning smell, or indoor unit leakage), immediately turn off the air conditioner, disconnect power, and contact a dealer or qualified professional.
- If the air conditioner operates under abnormal conditions, it may cause malfunction, electric shock, or fire.
- When using the emergency operation switch, press it with an insulating object.
- Do not step on the outdoor unit or place heavy objects on it to prevent damage or injury.
Maintenance Features
The manual provides detailed instructions for both user and installer maintenance, emphasizing safety and proper procedures.
General Maintenance:
- Cleaning and user maintenance should not be performed by children without supervision.
- Maintenance must be performed by qualified professionals.
- Do not use mineral oils to clean the unit.
- Do not use fire or a hair dryer to dry the filter.
Installation and Professional Maintenance:
- Installation must be performed by qualified professionals in accordance with electric safety regulations and local safety regulations.
- Use a qualified power supply circuit and circuit breaker. An all-pole disconnection switch with at least 3mm contact separation in all poles must be connected in fixed wiring.
- The air conditioner must be properly grounded by a professional using a specialized grounding device. The yellow-green wire is the grounding wire and should not be used for other purposes.
- The grounding resistance must comply with national electric safety regulations.
- The appliance must be positioned so that the plug (if applicable) is accessible.
- All wires for indoor and outdoor units must be connected by a professional.
- If the power connection wire is insufficient, contact the supplier for a new one; do not extend it yourself.
- For units without a plug, a circuit breaker must be installed in the line.
- Relocation of the air conditioner must only be performed by qualified personnel.
- Select an installation location out of reach of children and away from animals or plants; if unavoidable, add a fence for safety.
- The indoor unit should be installed close to the wall.
- The power supply must adopt a special circuit with air switch protection and sufficient capacity. Avoid frequent turning on/off of the unit.
- Disconnect the power supply if the air conditioner will be out of use for a long period.
- Never cut or damage power cables and control wires; replace damaged ones professionally.
- Do not damage or use unappointed electric wires.
- Ensure the installed stand is firm enough to prevent the unit from falling.
- Do not step on the outdoor unit or place objects on it.
- The unit must be reliably earthed.
- The temperature of the refrigerant circuit will be high; keep the interconnection cable away from the copper tube.
- The appliance shall be installed in accordance with national wiring regulations (NEC and CEC).
Refrigerant Handling (R32):
- The appliance is filled with flammable gas R32.
- Do not use means to accelerate defrosting or cleaning other than those recommended by the manufacturer.
- Should repair be necessary, contact an authorized Service Centre. Any repairs by unqualified personnel may be dangerous.
- The appliance must be stored in a room without continuously operating ignition sources (e.g., open flames, operating gas appliances, or electric heaters).
- Do not pierce or burn the refrigerant circuit.
- The appliance must be installed, operated, and stored in a room with a floor area larger than the minimum specified in the "Safety Operation of Inflammable Refrigerant" section.
- For repairs, strictly follow manufacturer's instructions.
- Be aware that refrigerants do not contain odor.
- Read the specialist's manual.
- Installation must be performed in accordance with the NEC/CEC by authorized personnel only.
- Use suitable instruments for R32 refrigerant. Do not use any other refrigerant.
Bleeding and Piping:
- After connecting indoor and outdoor units, bleed air and humidity from the refrigerant circuit using a vacuum pump to prevent compressor malfunction.
- The process involves unscrewing valve caps, connecting a vacuum pump, operating it for 10-15 minutes to achieve an absolute vacuum of 10 mm Hg, closing the low-pressure knob, and then opening and closing the 2-way valve to check for leaks.
- Tighten connections using two wrenches.
- Wrap all refrigerant pipes and joints.
- Install the drain fitting and drain hose (for heat pump models) on the outdoor unit chassis to channel condensate water.
Check After Installation:
The manual includes a checklist for installers to verify proper installation, covering aspects like reliability, gas leakage, thermal insulation, drainage, power supply voltage, wiring, grounding, and pipe length/refrigerant charge amount. This helps prevent issues such as vibration, noises, unsatisfactory cooling/heating, condensation, water dripping, electrical leakage, and component burnout.
Safety Operation of Flammable Refrigerant:
- All personnel engaging in refrigeration system work must hold valid certification from an authoritative organization and be qualified to deal with flammable refrigerants.
- If other technicians maintain the appliance, they must be supervised by a person qualified in flammable refrigerants.
- Repairs must follow the manufacturer's suggested methods.
- The air conditioner must not be used in a room with running fire sources.
- Do not drill or burn connection pipes.
- The air conditioner must be installed in a room larger than the minimum room area specified on the nameplate or in the provided table.
- Leak testing is mandatory after installation.
Maintenance Notes (Flammable Refrigerant):
- Ensure the maintenance area meets the nameplate requirements and is well-ventilated.
- Maintain continuous ventilation during operation.
- Prohibit naked flames in the maintenance area and display "no smoking" warnings.
- Replace vague or damaged warning marks.
Welding (Flammable Refrigerant):
- If cutting or welding refrigerant system pipes, follow a strict procedure: shut down the unit, cut power, eliminate refrigerant, vacuum, clean with N2 gas, then cut or weld.
- Refrigerant should be recycled into a specialized storage tank.
- Ensure no naked flame near the vacuum pump outlet and that the area is well-ventilated.
Filling the Refrigerant (Flammable Refrigerant):
- Use specialized R32 refrigerant filling appliances and prevent contamination with other refrigerants.
- Keep the refrigerant tank upright during filling.
- Apply a label to the system after filling.
- Do not overfill.
- Perform leakage detection before test running and again when the unit is removed.
Safety Instructions for Transportation and Storage:
- Use a flammable gas detector before unloading and opening the container.
- No fire sources or smoking are allowed.
- Comply with local rules and laws.
- The outdoor unit must always be kept upright during handling.
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