Air Handling Unit Cleaning
Poor Cooling and Low Air Flow ?
The air handling units are very important parts of the central air conditioning plants. As the name suggests air handling unit is the box type of unit that handles the room air. It comprises of the cooling coil over which the hot return air from the room flows, gets cooled and flows back to the room to cool it. The circulation of the air is carried out by the blower. The filter in the air handling unit enables cleaning of the air.
Filters only provide a primary level of filtration and hence dust particles less than 10 micron easily pass through the mesh filter and get settled on the evaporator coil. Once the evaporator coil starts sweating condensed water, the water mixes with the dust present and forms an sticky sludge on the coil. Over a period of time the sludge becomes solidified and blocks the air passage through the coil leading to low air flow and poor cooling.
Following is the inspections sequence for AHU and corresponding checks to be made.
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Air filter - for dry dust accumulation and mold formation.
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Cooling Coil - For blockage, Corrosion and Poor air flow.
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Drain Pan - For water stagnation and mold formation.
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Fan/Blower - For sludge/ debris.
Once the above inspections are conducted, we give you a clear assessment, cleaning and restoration strategy for the air handling unit. We provide the following levels of cleaning:
Level I - Brushing the evaporator coil on both sides for removal of dry debris.
Level II - Air washing with high pressures compressor air for removal of dry duct between the fins of the evaporator coil.
Level III - High Pressure water wash with application of sludge removal chemicals. This method is used when the flow capacity of the coil falls below 60% and generally take 6-10 hrs per coil depending on the size.
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It is also very important to keep condensate pans, and other AHU components clean to prevent mold growth inside of the equipment. Maintaining systems free of corrosion greatly extends the life of these costly systems.
Benefit of Cleaning the AHU
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AHU cleaning practices help keep condensate pans, blowers, and heat exchange surfaces (coils) clean and free of corrosion and buildup.
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Keeping these same systems free of build-up improves indoor air quality.
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Extends the life of the systems and greatly increases their efficiency.
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Save up to 15-20% energy if coils are maintained clean.
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Fan Coil Unit Cleaning
Musty smelling Rooms ?
A fan coil unit (FCU) is a simple device consisting of a heating or cooling coil and fan. It is part of an HVAC system found in residential, commercial, and industrial buildings. FCUs’ offer the most economic method of air conditioning, measured against VAV and main duct supply, has minimal main ducting, offer optimum flexibility and zone control and are ideal for refurbishment systems with low height ceiling voids. Designed to be mounted in concealed ceiling voids, these highly reliable FCU are suitable for typical commercial uses and are ideal for hotels, hospitals, suites, offices, conference rooms and other similar spaces, where the air must be conditioned to be:
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Temperature controlled (heating is optional)
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Filtered clean of particulates
Why Fan coil maintenance is required?
Industry and equipment manufacturer standards recommend that twice a year routine maintenance should be performed to both maintain the mechanical components of the fan coil unit and to ensure efficient operation of the unit. Fan coil units that lack proper maintenance work harder and result in a drop of efficiency in the unit. This results in the main central heating and cooling plant to work that much harder, leading to higher energy costs. The fan coil unit consists of mechanical moving components such as fan, fan motor, control valve and thermostat that need to be inspected and lubricated to prevent premature failure. Routine preventative maintenance can help minimize the risk of microbiological growth (mold). Key ingredients for microbiological growth are moisture and dust/dirt. Routine maintenance provides for vacuuming/cleaning of the interior components of the fan coil unit. Although there is no guarantee of the elimination of microbiological growth due to the design of the unit, the materials used within the unit and the conditions within the suite; routine maintenance does help to minimize the risk of this occurring.
Benefits of FCU Cleaning:
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Keeping these same systems free of build-up improves indoor air quality.
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Reduction is mold formation in drain pan.
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Lower power consumption.
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Extends the life of the systems and greatly increases their efficiency
Condenser Coil Unit Cleaning
Cool air costing a fortune?
Condenser coils are placed outside the buildings where waste heat can be dissipated to the outdoor air as heated gas inside the coil returns to its liquid state under pressure. Outside units are susceptible to collecting dust, pollen and other debris. Condenser runs more efficiently when excess heat leaves the system quickly, A coil fouled with dirt and grime cannot supply proper heat transfer and results in greater energy consumption. Equipment operating with dirty coils can use up to 37% more energy than those with clean coils.
Additionally, a dirty system’s cooling capacity can be reduced by as much as 30%. Dirty coils increase operating pressure and temperatures that breakdown the compressor’s lubricant and can result in equipment failure. A failed compressor means no cooling and costly repair, so keeping the coils clean can lower utility bills and lengthen the lifespan of the system.
Generally, a stiff nylon brush, a can of commercial cleaning solution and a hose are usually sufficient to remove any build-up of dirt. If the unit has not been cleaned in some time, it's best to call a professional AC service to clean the coils thoroughly. We are NADCA certified professional with a decade of experience in coil cleaning using environmental friendly chemical compounds and methods.
Benefits of CCU Cleaning:
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Increase HVAC operating efficiency.
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Extend equipment life.
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Improve indoor air quality.
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Lower cost of operation.
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