This document is an installation manual for a Toshiba split-type inverter air conditioner, designed for use with HFC R410A refrigerant. It provides detailed instructions for the safe and proper installation, electrical wiring, and initial operation of the indoor and outdoor units.
Function Description:
The Toshiba air conditioner is a split-type inverter system, meaning it consists of separate indoor and outdoor units connected by refrigerant piping and electrical wiring. The inverter technology allows the compressor to vary its speed, leading to more efficient operation, precise temperature control, and reduced energy consumption compared to conventional fixed-speed units. It uses HFC R410A refrigerant, which is an environmentally friendly option that does not deplete the ozone layer. The manual emphasizes the importance of proper installation to ensure the unit's safety, efficiency, and longevity.
Important Technical Specifications:
The manual lists specific indoor and outdoor unit models:
- Indoor unit: RAS-05, 07, 10, 13, 16BKV-E
- Outdoor unit: RAS-05, 07, 10, 13, 16BAV-E
Electrical specifications for different models are provided:
- Power source: 50Hz, 220-240 V Single phase for all listed models.
- Maximum running current:
- RAS-05, 07BKV-E: 5.0A
- RAS-10BKV-E: 6.7A
- RAS-13BKV-E: 7.1A
- RAS-16BKV-E: 8.0A
- Circuit breaker rating:
- RAS-05, 07BKV-E: 6.5A
- RAS-10BKV-E: 8.5A
- RAS-13BKV-E: 9.0A
- RAS-16BKV-E: 10.0A
- Power supply cable and connecting cable: H07RN-F or 60245 IEC66 (1.5 mm² or more).
Refrigerant piping specifications:
- Liquid side: Ø6.35 mm for RAS-05, 07, 10, 13BKV-E; Ø12.70 mm for RAS-16BKV-E.
- Gas side: Ø9.52 mm for RAS-05, 07, 10, 13BKV-E; Ø12.70 mm for RAS-16BKV-E.
- Pipe thickness (R410A): 0.8 mm for Ø6.4, Ø9.5, Ø12.7 mm pipes.
- Allowable pipe length: Up to 15 m for RAS-05, 07, 10, 13BAV-E; 20 m for RAS-16BAV-E.
- Allowable height of outdoor-unit installation site: Up to 12 m.
Tightening torques for flare pipe connections:
- Ø6.35 mm: 16 to 18 N·m (1.6 to 1.8 kgf·m)
- Ø9.52 mm: 30 to 42 N·m (3.0 to 4.2 kgf·m)
- Ø12.70 mm: 50 to 62 N·m (5.0 to 6.2 kgf·m)
Usage Features:
The air conditioner includes a wireless remote control for convenient operation. The manual details how to select between A-B settings for the remote control, which is useful when two indoor units are installed in the same or adjacent rooms to prevent simultaneous operation. It also describes the "Test Operation" mode (COOL) activated by pressing the RESET button for 10 seconds, and the "Auto Restart Setting" feature. This auto-restart function allows the unit to automatically resume operation in its previous mode after a power failure, which can be enabled or disabled via the RESET button on the indoor unit.
Maintenance Features:
The manual provides basic maintenance instructions for air filters:
- Cleaning frequency: Every 2 weeks.
- Cleaning procedure: Open the air inlet grille, remove filters, vacuum or wash and dry them, then reinstall.
For installation, the manual emphasizes several critical steps to ensure proper function and safety:
- Installation plate mounting: Securely fix the installation plate horizontally on the wall, using appropriate screws or anchor bolts depending on the wall type.
- Piping and drain hose installation: Insulate connecting pipes separately to prevent dewing. Ensure the drain hose is sloped downward to prevent water leakage.
- Refrigerant piping connection: Use new and clean piping materials designed for R410A. Proper flaring and tightening of flare nuts are crucial to prevent gas leaks, with specific projection margins and torque values provided.
- Evacuating: Use a vacuum pump with a counter-flow prevention function to remove air and moisture from the connecting pipes and indoor unit. This is a critical step for R410A systems due to their sensitivity to impurities.
- Gas leak test: After connections, check for gas leaks at flare nut connections using a gas leak detector or soap water.
- Electrical works: Connect power supply and connecting cables according to diagrams, ensuring firm connections and proper grounding. A circuit breaker or switch with at least 3 mm contact separation in all poles must be incorporated into the fixed wiring.
- Reuse of existing pipes: The manual includes an appendix detailing conditions under which existing R22 or R407C piping can be reused for R410A systems. Strict checks for dryness, cleanliness, tightness, and pipe integrity (scratches, dents, thickness) are required. If conditions are not met, new pipes must be used. Flushing and recovering refrigerant from existing systems are also outlined.
- Curing of pipes: Instructions are given for pinching or taping pipes when indoor or outdoor units are opened for extended periods to prevent rust from moisture or foreign matter.
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