Compressor room commissioning checklist
End-to-end commissioning for a new or relocated compressor installation: ventilation, piping, electrical, controls, and documented baseline.
This guide is general field reference for trained, qualified service technicians. It is not a substitute for the original equipment manufacturer's service manual, applicable codes (NEC, OSHA, ASME, local), or the judgment of a licensed professional. Procedures, torque values, pressures, refrigerants, and safety requirements vary by make, model, jurisdiction, and revision. Always verify against current OEM documentation and follow your employer's safety program. Working on compressed-air, electrical, pressure-vessel, and refrigerant systems can cause serious injury or death. By using this guide you accept all risk; AirCompDX and its authors disclaim all warranties and are not liable for any damage, injury, loss, or code violation arising from its use.
Nothing energizes until guards are on, relief valves are installed and correctly set, and the disconnect is properly labeled with available fault current and arc-flash data.
- Clamp meter and true-RMS multimeter
- Calibrated pressure gauges and infrared thermometer
- Anemometer for ventilation verification
- Torque wrench for electrical lugs
- Level and shim stock
- Isolation valves, flexible connector, and correctly sized piping
- ASME relief valves for receiver and any isolatable section
- Vibration isolation pads
- Labels, arc-flash placard, and rotation direction decals
- 1Verify the room
Confirm ventilation: roughly 150–200 CFM of airflow per compressor horsepower for air-cooled units, with intake low and discharge high. Ambient at the intake should stay below 100–105°F at worst case.
- 2Set and level
Level the package within OEM tolerance on a rigid pad. Isolation pads under a screw package, and anchor bolts for a recip — an unanchored recip walks.
- 3Check the inlet air
Draw intake air from the coolest, cleanest source available. Never pull from near a loading dock, paint booth, or solvent area — hydrocarbons in the intake destroy separators and contaminate the fluid.
- 4Verify the piping
Full-size takeoffs from the top of the header, a flexible connector at the compressor, isolation valves at each machine, and a slope of about 1" per 10 ft toward drip legs. Never use PVC for compressed air.
- 5Electrical verification
Confirm conductor sizing at 125% of FLC, OCPD within NEC 430.52 limits, overload set to 115–125% of FLA, torque every lug to spec, and verify voltage imbalance under 2%.
- 6Bump and confirm rotation
Jog the motor and verify the rotation arrow before loading. On any three-phase install, this step is non-negotiable.
- 7Fluid and filters
Verify sump level cold, correct fluid family, and that all shipping plugs are removed. Log the fluid type and date on a tag at the fill port.
- 8Set pressures
Set the target discharge to the lowest pressure the plant's critical application actually needs, plus distribution losses. Set the differential band, then confirm the relief valve is at least 10–15% above and below MAWP.
- 9Commission the controls
Verify all trips: high temperature, high pressure, motor overload, and emergency stop. Physically test the E-stop, do not assume.
- 10Record the baseline
Log full-load amps, discharge pressure and temperature, separator ΔP, ambient, and sound level. This baseline is what every future troubleshooting call gets compared against.
- 11Hand off
Walk the operator through daily checks, drain testing, and shutdown. Leave the manual, the parameter backup, and a laminated PM schedule in the room.