| S.No. | Checkpoint | IS Requirement | Status |
|---|---|---|---|
| A. TESTING PHASE | |||
| A1 | System operation verified: AHU/FCU fan starts and runs smoothly without noise or vibration issues Acceptance: Unit powers on; fan accelerates gradually; no unusual noise; vibration levels acceptable | Cl. 4.1 — System startup | |
| A2 | Supply and return air flows measured at main points; initial readings documented Acceptance: Flows measured in m³/s; recorded in TAB report; typically 85-95% of design on first reading | Cl. 4.2 — Baseline flow measurement | |
| A3 | Room temperatures measured in representative zones; thermostat control verified Acceptance: Room temperature within ±2°C of setpoint; thermostat responds to setpoint changes; no deadband issues | Cl. 4.3 — Temperature verification | |
| B. ADJUSTING PHASE | |||
| B1 | Damper adjustments made to balance zone flows; volume control dampers gradually opened/closed Acceptance: Dampers adjusted incrementally (≤1 turn per iteration); flows measured after each adjustment; documented | Cl. 5.1 — Damper adjustment | |
| B2 | Fan speed/capacity adjusted if needed to achieve overall design flow; pressure verified Acceptance: Fan speed adjusted gradually; power input monitored; total flow approaches design value step-by-step | Cl. 5.2 — Fan adjustment | |
| B3 | Thermostat calibration verified; setpoint vs. actual room temperature difference noted and corrected if > 1°C Acceptance: Thermostat readings vs. reference thermometer verified; calibration adjustments made if needed | Cl. 5.3 — Thermostat calibration | |
| C. BALANCING PHASE | |||
| C1 | All room outlet flows measured and recorded in final balance table; zone-by-zone flow documented Acceptance: All zones: ≥90% of design flow; deviation between zones ≤±10%; final table attached to report | Cl. 6.1 — Final flow balancing | |
| C2 | Supply and return air temperatures measured in all zones; temperature uniformity verified Acceptance: Supply temperature deviation ≤±2°C across zones; no zone overheating/overcooling by > 1°C | Cl. 6.2 — Temperature balancing | |
| C3 | Pressure drops across dampers and diffusers documented; system resistance verified Acceptance: Pressure profile acceptable per design; no excessive pressure drops indicating blockages | Cl. 6.3 — System resistance verification | |