Condensers washing.

Mr. Tun checking the cleaning work. Finally the job was done satisfactorily and our customer was happy.

Mr. Ordos was cleaning the exteriors of the condensers.

Our engineer, Mr. Lim was vacuuming the dirty water from the tray.

Mr. Tun was waiting patiently for housekeeping the place to finish so that he can change shift and go home.

The customer's representive, Mr. Tun taking pictures of the condensers conditions after washing the condensers.

In one morning, we came to this site to wash and clean the condensers so that there is proper air ventilation and prevent high side pressure from rising. The M.D., Mr. Dragon Lim and his engineer Mr. Lim Chin Sun were laying tray below the condensers to collect dirty water.

In this article, we carried out maintenance of condensers washing at a special site whereby no single drop of water is allowed to drip on the floor of an office building's carpark in Singapore. The name of the building is prohibited to mention here. The location of the condensers is at one of the floor of a multi-storey carpark. Below this level of carpark are the commercial office lots. The reason why water cannot drip to the floor is because the building was constructed without water-proofing the floors. This commercial building was built more than 20 years ago.

Look at the photo above, can you see what is it and what is the problem? The photo shown a corroded condenser fins covered with a thick layer of black soots and dusts. But where is black soots come from ? Why the fins corrodes ? Think about it. You tell me the answers. If your answers are right, I will give you a surprise !

Chemical washing of evaporators coils 2.

When the washing and cleaning were done, engineer Mr. Teo Leong Kock admired his well done job.
We covered back all panels and test run the air-con. There are no more water condensate dripping into the compartments and underfoor. The work took us almost a day to complete successfully.

The Dragon Lim engineers carried the blower and motor assemblies back to the compartment carefully.

Mr. Teo Leong Kock tightening the bolts and nuts of the blower assembly.

When all evaporators coils were washed, MD Dragon Lim and his engineers carried the blower and motor assembly back to the compartment one by one. He aligned the assembly position correctly.

Mr. Lim Chin Sun helping Mr. Teo Leong Kock to go into the blower compartment to wash the next set of coils and fins.

MD Dragon Lim removing motors cables from contactor for the second blower.

MD Dragon Lim was pressurising the solution in the hand pump. The pressure of the solution need to pressurise when the solution is not spraying from the nozzle.

Mr. Ng Yee Peow made sure that he took a nice picture.

Our customer, Mr. Ng Yee Peow taking picture of how to wash the evaporator coils.
 

This photo shows engineer Mr. Teo Leong Kock spraying degreasing solution at the coils and fins. He had to cover his nose to prevent inhalation of sprayed vapour. It had to be spayed row by row to ensure all areas were covered with degreasing solution.

This photo shows a oil stained evaporator coils.

This photo shows the empty compartment with a built-in duct for down throw.

The first blower and motor assembly removed from unit and placed on the floor.

Chemical washing of evaporators coils 1.

Recently, we had a chemical washing of evaporator coils of a precision packaged unit. The reason of using chemical to wash the evaporator coils and fins is to degrease the residue oil films and stains from the coils and fins surfaces so that water condensate is able to flow to the drain properly by gravity. Otherwise the water condensate drips everywhere within the blower compartment and eventually to the underfloor.

The first step is to remove all the blower and motor assemblies from the unit. The photo above shows MD Dragon was unscrewing the mounting screws of the blower assembly at the four corners. Then the blower assemblies were removed one by one.

Engineers at work 2.

Mr. Tai Kek Lee tightening the screws to close the panels. The job was done and tested. The condenser is running normally. Our customer is happy too.

Engineers at work 1.

Mr. Lim Chin Sun is putting up the fan grille after repaired a fan motor bracket for a condenser. The motor bracket weld gave way causing the motor without proper grips. If it goes unnotice, the motor drops and its propellors cut the power cables and copper tubes. Eventually more damages are incurred. That is why preventive maintenance is so important to ensure equipment and machines are running normally. Without preventive maintenance, more money is spent to recover the machine back to normal running conditions. Sometime, you may need to replace with a new machine and more productive time is wasted.

My engineers.

The above photo shows my team of dedicated aircon engineers and myself. Counting from the left are : Mr. Lim Chin Sun, Mr. Teo Leong Kock, Mr. Tai Kek Lee, Mr. Dragon Lim (myself) and Mr. Ondos Minggol. They form a strong pillar in my business. Our engineers are multi-tasking, they are skillful in electrical cabling works, troubleshooting of faults, welding, brazing and other maintenance works.