The following are common industry procedures：

1. Pre-commissioning preparation

Mainly includes mechanical checks: boiler body installation completed, piping construction completed, flanges secured, insulation completed, exhaust and drainage systems functioning normally, flue installation completed, etc.; electrical checks: control panel power supply normal, grounding completed, motor insulation normal, emergency stop function normal, control signal testing completed; water system checks: water pressure normal, circulation pump direction correct, exhaust completed, water level normal, softening water equipment normal.

2. Cold run

No ignition. Key checks include: circulation pump operation, valve operation, water flow direction, pressure differential, control signals, and interlock functions. Common tests include: circulation pump forward/reverse rotation and flow rate, high/low pressure protection of the pressure switch, thermostat start/stop settings, water level control for low water protection, and alarm system's buzzer and indicator lights.

3. Pre-Ignition Safety Checks

Before formal ignition, the following must be checked: gas pressure, oil pressure, ventilation status, flue unobstructed, explosion-proof door, flame detector, and low water level protection. This step is crucial.

4. Initial Firing

The procedure typically includes: starting the blower, purging the furnace, igniting the igniter, pilot ignition, flame detection, switching to the main burner, and heating up. "Purge" is crucial to remove flammable gases and prevent explosions.

5. Heating and Load Testing

During heating up, the following precautions must be taken: avoid excessively rapid heating, prevent thermal shock, monitor pressure and temperature, and observe circulation flow. This usually involves: initial confirmation, combustion stabilization testing, control testing, and full-load verification.

6. Safety Protection Testing

One of the most important procedures in commissioning, this includes: over-temperature trip, over-pressure protection, water shortage shutdown, flame failure shutdown, low gas pressure protection, and emergency stop. According to the data, automatic controls and safety interlocks must be tested item by item.

7. Combustion Tuning

At this stage, engineers will adjust the following parameters one by one: air-fuel ratio, damper, burner angle, oxygen content, and exhaust gas temperature to improve efficiency and reduce NOx, CO, and other waste emissions.

8. Commissioning Records

Typically, the following should be established: commissioning report, temperature records, pressure records, combustion data, fault records, and safety test results.

Common Commissioning Problems

• Poor circulation: Possible causes include air in the pipes, incorrect pump model, or valves not open.

• Ignition failure: Causes include: flame sensor malfunction, insufficient gas pressure, and ignition rod failure.

• Overheating trip: This can be caused by insufficient water flow, poor heat exchange, or incorrect controller settings.