Half of all AC complaints — water leakage, weak cooling, early gas leaks — trace back to installation, not the machine. This checklist covers what to prepare before installation day and the 8 things to verify while the technicians are still in your home.
Quick picks (TL;DR)
| Check | Why it matters |
|---|---|
| Copper length quoted upfront | Extra metres cost ₹800-1,200/m later |
| 2.5-4 sq mm dedicated wiring | Shared circuits trip all summer |
| Slight outdoor tilt | Condensate drains, doesn’t pool |
| Drain pipe downward slope | Water leakage is #1 complaint |
| Vacuum before gas release | Moisture kills compressors |
Before installation day
1. The electrical prep
A 1.5-ton inverter AC needs a dedicated 16A socket on 2.5-4 sq mm wiring from the MCB — not a shared extension board. Old buildings: get an electrician to verify the circuit before installation day; ₹2,000 now prevents a summer of breaker trips.
2. The copper-line reality
Standard installation includes ~3 metres of copper piping. Measure the indoor-to-outdoor distance honestly and ask for total cost including extra copper — roadside installers quote low then charge ₹800-1,200 per extra metre at your most vulnerable moment.
3. Mounting locations
Indoor unit: away from direct sunlight and beds (no cold air blowing on sleepers), 15cm+ clearance from ceiling. Outdoor unit: shaded if possible, on brackets or a stand rated for 40kg+, with airflow clearance on all sides.
The installation checklist
1. Voltage stabilizer (AC-rated)
Check Price →≈ ₹2,000 · 4-5 kVA for 1.5-ton, wide voltage range
Best for: The ₹2K insurance
Even ‘stabilizer-free’ inverter ACs benefit in wild-voltage areas — the compressor is too expensive to gamble on grid quality.
- Compressor protection
- Wide-range models
- Cheap vs repair
- Needs a wall socket nearby
2. Copper piping (extra metres)
Check Price →₹800-1,200/metre · insulated copper pair with wiring
Best for: Know the price before day
Buying the extra copper yourself at market rate (or confirming the quote upfront) removes the installation-day hostage moment.
- Transparent cost
- Gauge matters (0.8mm+ walls)
- Insulation quality varies
- Technician quality still decides
3. AC stand (outdoor, iron/SS)
Check Price →≈ ₹800-1,500 · rated 40kg+, rust-resistant
Best for: Ground-floor outdoor mounting
Ground-floor outdoor units sit in dust and puddles — a proper stand lifts them into cleaner airflow and easier servicing.
- Cleaner airflow
- Easier servicing
- Anti-rust options
- Wall drilling still needed
- Check load rating
The 8 checks on installation day
1. Indoor unit perfectly level (bubble level — tilted units leak water). 2. Drain pipe continuous downward slope, no upward bends. 3. Nitrogen vacuum done before gas release (ask — 10 minutes, compressor-saving). 4. Flare nuts tightened with torque wrench, checked with soap-water for bubbles. 5. Copper lines insulated end-to-end (exposed copper sweats and drips). 6. Outdoor unit tilted 2-3° backward for drainage. 7. Test run 15 minutes with temperature at 16°C — check airflow temperature and drain flow. 8. Bill itemising copper metres, stand, and installation fee — warranty registration needs it.
Choosing the AC itself: the master AC guide, the tonnage chart, and the inverter savings math. Season the summer with Aam Panna — the traditional heat-shield drink.
FAQs
How much does split AC installation cost?
₹1,500-2,500 standard (up to 3m copper included). Extra copper ₹800-1,200/metre, stands ₹800-1,500, wiring prep ₹1,500-2,500 if needed. Get the all-in quote upfront.
Why is my new AC leaking water inside?
Almost always installation: tilted indoor unit or upward-bent drain pipe. It’s the #1 installation defect — covered in check #2 and #6.
Do I need a stabilizer for a new inverter AC?
Built-in protection covers normal ranges, but wild-swing areas (village feeds, old buildings) should add one — ₹2,000 insurance on a ₹45K compressor.
What is nitrogen vacuuming and is it necessary?
The technician evacuates moisture and air from copper lines before releasing refrigerant. Skipping it mixes moisture into the system — compressor damage within 2-3 years. Always ask if it was done.