RXQ12BYM

🔧 INSTALLATION GUIDE FOR VRV A OUTDOOR UNIT MODEL: RXQ12BYM

🧰 1. Preparation before installation

✅ Required tools:

• Pressure gauge

• Vacuum pump

• Copper pipe welding machine, brazing gas, striker

• Torque wrench, screwdriver, electrical pliers

• Electronic level (if available)

• Protective equipment (gloves, safety glasses, insulated shoes)

✅ Check the installation location:

• Well ventilated: Ensure the outdoor unit is placed in an area with good airflow and is not obstructed.

• Strong load-bearing capacity: The floor or support frame must be strong enough to bear the weight of 210kg.

• Easy maintenance: Allow at least 300mm of clearance around the outdoor unit and at least 1m in front of the fan outlet.

• Vibration reduction: Use anti-vibration rubber pads or install on a dedicated support frame.

🔩 2. Mechanical installation

✅ Step 1: Position and secure the outdoor unit

• Use expansion bolts or a support frame to secure the outdoor unit to a concrete base or steel stand.

• Ensure the outdoor unit is perfectly level to prevent vibration and fan damage.

✅ Step 2: Connect the copper pipes

• Use standard copper pipe (thickness ≥ 0.8mm).

• Clean the pipe ends and braze them tightly using Nitrogen gas to prevent oxidation.

• Ensure pipe length and elevation differences are within the manufacturer's specifications.

✅ Step 3: Connect the condensate drain pipe (if applicable)

• Route the pipe outdoors with a natural downward slope, avoiding bends.

• Ensure the pipe is not blocked, which could cause water overflow.

⚡ 3. Electrical connections

✅ Power supply:

• Use a 3-phase 380V – 50Hz power supply and appropriately sized wiring (typically ≥ 6mm²).

• Install a dedicated circuit breaker for the outdoor unit.

• Connect terminals L1, L2, L3, N and earth (PE) correctly according to the manufacturer's wiring diagram.

✅ Controls:

• Connect the control signal wires according to the VRV circuit diagram, using shielded cable.

• Never connect the signal wires and power wires incorrectly to prevent circuit damage.

🔍 4. Checking, vacuuming, and refrigerant charging

✅ Vacuuming:

• Use a dedicated vacuum pump to evacuate the system for at least 30 minutes or until a pressure of -760mmHg is reached.

• Ensure that there is no air or moisture remaining in the pipes before charging refrigerant.

✅ Refrigerant charging:

• The RXQ12BYM outdoor unit is pre-charged with a quantity of R410a refrigerant for the standard pipe length.

• If the pipe length exceeds the allowable limit, add refrigerant at the rate required by the manufacturer (approximately 0.02 kg/m of additional pipe).

🟢 5. Startup and operation check

• Turn on the power supply, then test-run the system using the central controller.

• Check pressure, current, noise, and vibration during operation.

• Confirm there are no refrigerant leaks, electrical leaks, or error alerts.

⚠️ Installation safety notes

• Only trained technicians specializing in VRV systems are permitted to perform the installation.

• Never do not start the system before vacuuming.

• Install according to the applicable standards to avoid voiding the manufacturer's warranty.

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