BOILERS systems are an integral part of a commercial building’s central energy plant, typically comprising several devices located together, allowing for easy monitoring and services like water and electrical systems. The devices are chillers, cooling towers, piping and distribution systems, and boilers.
Prevent costly downtime and expensive equipment failures
Modern diagnostic equipment can help save large amounts of energy in a modern central energy plant. Many boiler problems can be diagnosed and possibly prevented by conducting regular, routine maintenance and repair and reducing costly downtime and expensive equipment failures. Proper boiler and equipment operation improves safety. All of these benefits easily cover the initial cost of quality test equipment.
- The Fluke TiS thermal imager is an infrared camera that transforms preventive maintenance programs into reality. Technicians/contractors who need quality images and feature-rich cameras, an option for their troubleshooting, intermittent inspection, and preventive maintenance need Fluke’s new TiS. Features include Voice Annotation, IR PhotoNotes, Asset Tagging, and manual or fixed focus.
- The Fluke 179 DMM digital multimeter, with temperature readings, is the industry-standard troubleshooting tool for electrical and electronic systems.
What needs to be checked?
Each of the boiler systems has several devices that allow it to function efficiently and safely. Common fittings include steam traps, pressure gauges, insulation, pumps, and valves. To maintain safe and efficient boiler operation, these fittings must be maintained properly. Safety sensors, electrical circuits, and the efficiency of combustion must be checked as well.
Steam traps
The Fluke TiS thermal imager can easily and quickly calculate the temperature of the pipes, and diagnose whether or not the steam trap is operating properly or needs repair. The portability of thermal imagers allows quick diagnosis of multiple steam traps. It has been shown that repairing one large steam trap could pay the cost of the thermal imager.
Valves are used for the control of hot water, feedwater, condensate, and steam. Modulating valves control temperature at terminal units, air handling units, and steam to hot water heat exchangers. A valve that is malfunctioning can cause improper operation and high energy costs. The Fluke TiS thermal imager detects small steam leaks for early valve repack and repair and show the temperature difference on either side of the valve, indicating a leak.
Safety limits, sensors, and controls
A boiler system has numerous safety limits, sensors, and controls. If these fail, it can lead to boiler shutdown or a potentially catastrophic boiler explosion. Components could include flame and steam pressure, gas pressure, temperature devices. Their accuracy and operation should be checked with certified diagnostic test equipment to ensure safe and efficient operation.
Electrical systems are another area where diagnostic equipment is vital in a boiler plant. A major worry is that incoming electrical power from the utility may fail, be interrupted, or have the wrong current, voltage, or phase. Fortunately, power quality analysers can show incoming power quality issues and monitor for problems. Other potential problems occur in individual electrical components: loose connections, breakers, switches, safety limit controls, and sensors. The Fluke TiS thermal imager can be used to see “hot spots” in a panel, which may be caused by loose connections or a breaker about to fail. The Fluke 179 DMM digital multimeter can check continuity in electrical control systems. Measure temperature and pressure signals such as resistance, voltage, and current input sensors and compare them with factory calibration values to determine whether the sensor or transmitter is operating properly. Some DMMs can be used to generate voltages to check the operation of motorised valve actuators.
Contact COMTEST on + 010 595 1821, sales@comtest.co.za or www.comtest.co.za
