Installing a ceiling cassette unit requires precision to ensure proper drainage and aesthetics. This process typically follows these core steps:
Location: Choose a central area with no obstructions to airflow. Ensure the ceiling structure can support the unit's weight (often 20kg - 50kg).
Marking: Use the provided paper template to mark the ceiling cut-out and the four suspension bolt locations.
Cutting: Cut the ceiling opening slightly larger than the unit body but smaller than the decorative panel.
Bolts: Install four M10 or W3/8 suspension bolts into the concrete slab or reinforced wooden beams.
Hanging: Lift the indoor unit and secure it using double nuts and washers.
Leveling: Use a spirit level. The unit must be perfectly horizontal or slightly tilted toward the drain pipe (depending on manufacturer specs) to prevent water leakage.
Refrigerant Lines: Connect the copper gas and liquid pipes using flare joints. Vacuum the system to remove moisture.
Drainage: Connect the drain hose. Cassette units usually have a built-in lift pump; ensure the external pipe has a downward slope of at least 1:100.
Wiring: Connect the power and communication cables between the indoor and outdoor units following the wiring diagram.
Panel Installation: Attach the decorative grille (panel). Connect the display and swing-motor wires to the main control board.
Test Run: Operate the unit for 30 minutes. Check for abnormal noise, proper cooling/heating, and verify that the drain pump is discharging water correctly.
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