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Ac should have filters gutted or replaced before preliminary for the season the AC season seems to always be in full swing somewhere in the UAE All air conditioning systems should be given a defensive Ac maintenance tune-up beforehand starting for the season.
One significant but often overlooked piece of gear in the air conditioning system is the air filter, which defends the evaporator from dirt and lint. This article will travel how a dirty air filter can limit airflow over the evaporator and cause very thoughtful and classy system problems.
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Owners are complaining of poor cooling in their house. They also complain of summary airflow coming from the registers, as well as high moisture in the house. The AC is a 3-ton, R-410A, split-type. Ac system with the A-coil in the plenum of the furnace situated in the basement. The abbreviating unit is located on the east end of the household.
The house is a 2,500-square-foot ranch located in a sector in Dubai City, UAE, and the homeowners are an old couple who rely on AC for health reasons. It has been an unusually hot summer, and temperatures in the house are attainment 80°F. According to the homeowners, temperatures secret the house have been rising progressively in the last two weeks, even however they try to keep the house at 72°F throughout the whole summer.
An Ac Repair Arabian Ranches technician reaches the location. After presenting himself and his company Ac Maintenance in Dubai. The technician contraries with the two homeowners. To get as much info and history about the air conditioning problem as likely. The technician then goes outdoor to the condensing unit and put in both high- and low-side gauges.
He promptly notices that the force pressure is reading 90 psig (26°F). The normal force pressure should be about 121 psig (41°F) for the outside temperature and humidity circumstances that day. The head pressure is also low at 340 psig for the 90°F day. The head weight should be in the 390 to 420 psig range.
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The Ac Repair Dubai technician also signs the compressor sweating deeply from top to bottom. He then traces the crankcase area, or lowest of the compressor, and finds that it is very cold. This means that the compressor is sorrow from the refrigerant flood back. Which is when a runny refrigerant enters the crankcase of the compressor during the consecutive cycle.
The Ac Repair Dubai technician then put in a temperature probe on the pressure line. About 6 inches from where it arrives the compressor, and it reads 27°F. He then deducts the saturated vanishing temperature of 26°F from the compressor. Inlet temperature 27°F and finds out that there is only 1°F of compressor superheat.
This strengthens that there is a refrigerant flood back problematic. Refrigerant flood back can devastation a compressor by thinning the compressor’s oil with liquid refrigerant. This has a propensity to ruin the lubricity of the oil and score bearing exteriors in the compressor. Flood back also causes oil foamy, which can cause the oil to be pumped out the release valve and into the system. Discharge valve injury can also happen from the oil foam/refrigerant rich mixture.
Airflow Problem & Ac Repair Arabian Ranches
The technician then checks the airflow and agrees with the owners that there is a reduced airflow problem. He takes an amperage interpretation of the fan motor and finds it to be 2.5 amps. This is far from the sign amperage of 8 amps. This tells the technician that the fan motor is only partly loaded and is not touching. The proper amount of air it is intended to move. For more to know about Ac Ducting Dubai click here.
The Ac Ducting Dubai technician then chooses to check. The air filter situated in the return air cupboard before the evaporator or A-coil. He signs that it is filled with dust and lint. Though even with the air filter dragged. There still is a limited airflow problem, and the fan motor lasts to pull low current. Ac Maintenance technician then chooses to have a look at the A-coil itself. He closes off power to the unit and eliminates the plenum. He finds that the A-coil is almost totally covered with a blanket of ice and ice.
The technician then thaws the iced coil with a large wattage blow drier, and after putt. The plenum back on the unit and installation a new air filter, the technician starts the system. The proper airflow has been recognized, and the suction pressure is normal at 121 PSIG (41°F). The fan motor is now a sketch normal current of about 7 amps.
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The Ac Service Dubai technician then clarifies to the homeowners. That a dirty air filter has produced restricted airflow over the A-coil evaporator and talks. The rank of keeping the air filter clean. This limit in the airflow caused a low suction pressure since of a reduced heat load. Incoming the evaporator coil, which caused a slower evaporation rate of refrigerant in the evaporator.
The limited airflow also unloaded the fan motor, causing it to draw low amperage. Once the evaporator coil froze solid, the refrigerant saying very little heat and moisture load. This caused a low evaporation rate and some of the liquid refrigerant. Trickled down the force line to the compressor’s crankcase, causation flood back. This is why there was only 1°F of compressor superheat and the crankcase area were cold to the trace.
Somewhat as simple as a dirty air filter was the offender in freezing the coil and causing low head and suction weights. In this case, the low airflow was the major clue to the problem, and it wouldn’t have been noticed. If the technician did not opposite with a homeowner before troubleshooting.
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