General Assist Technical Reference
Wall-Mounted Split Installation Guide
ASTG09KMCA / ASTG12KMCA
For approved AOTG09KMCA / AOTG12KMCA R32 outdoor units
R32 flammable refrigerant: Installation, pressure testing, evacuation, charging and service work must be completed by qualified personnel using R32/R410A-rated tools and materials.
Matched-system requirement: Confirm the exact indoor and outdoor model numbers before installation.
1. Quick specifications
| Item | Requirement |
|---|---|
| Refrigerant | R32 |
| Liquid pipe | 6.35 mm (1/4 in), 0.8 mm minimum wall thickness |
| Gas pipe | 9.52 mm (3/8 in), 0.8 mm minimum wall thickness |
| Maximum pipe length | 20 m |
| Maximum height difference | 15 m |
| Additional charge | None required up to 20 m |
| Maximum charge | 850 g |
| Cooling range | 10°C to 46°C |
| Heating range | -15°C to 24°C |
| Interconnection cable | 1.5 mm², 3 conductors plus earth |
2. Indoor installation
| Clearance | Minimum |
|---|---|
| Above unit | 63 mm |
| Left side | 70 mm |
| Right side | 130 mm |
| Floor to unit | 1.8 m |
Human sensor: Approximate detection range is 7 m, 90° vertically and 100° horizontally.
- Secure the wall-hook bracket level using at least five suitable screws.
- Cut a 65 mm wall hole with the outside edge 5–10 mm lower.
- Fit a wall pipe and wall cap.
- Keep the drain hose below the refrigerant pipes.
- Engage the upper hooks, then press the lower section onto both lower hooks.
3. Outdoor installation
| Side | Minimum |
|---|---|
| Rear | 10 cm |
| Left | 10 cm |
| Right | 25 cm |
| Front | 20 cm |
| Above | 60 cm |
4. Flare torque
| Pipe | Torque |
|---|---|
| 6.35 mm | 16–18 N·m |
| 9.52 mm | 32–42 N·m |
5. Pressure test and vacuum
Dry nitrogen only. Pressure test to 4.15 MPa.
- Confirm service valves are closed and power is isolated.
- Pressure test both liquid and gas lines with dry nitrogen.
- Leak-test all flare connections and confirm pressure is stable.
- Evacuate to -0.1 MPa or 65 Pa / 500 microns.
- Continue vacuum operation for at least 15 minutes.
- Stand for 1–2 minutes and confirm the gauge does not rise.
- Fully open both service valves and tighten all caps.
6. Wiring
Match terminals 1, 2 and 3 between indoor and outdoor units and connect protective earth.
| Screw | Torque |
|---|---|
| M3.5 | 0.8–1.0 N·m |
| M4 | 1.2–1.8 N·m |
| M5 | 2.0–3.0 N·m |
7. Test run
Hold MANUAL AUTO for more than 10 seconds. The OPERATION and TIMER lamps flash together. Select HEAT for a heating test.
- Check remote operation and indicator lamps.
- Check louvre movement.
- Confirm drainage.
- Confirm no abnormal noise or vibration.
- Leak-test all refrigerant connections.
8. Optional controls
| Option | Reference |
|---|---|
| Wired controller | UTY-RVNYN / UTY-RNNYN; communication kit required |
| Simple controller | UTY-RSNYN; communication kit required |
| External connect kit | UTY-XWZXZ5 |
| Communication kit | UTY-XCBXZ2 |
Based on Fujitsu General indoor installation manual Part No. 9333005126 and outdoor installation manual Part No. 9320394004-04. This field reference does not replace the complete manuals or current regulations.