1. Phenomenon: Horizontal concealed fan coils of a hotel room often flow down from the ceiling in summer.
Reason: The condensed water pipe of the fan coil is discharged centrally. As a result, the upper space on the top cannot meet the requirements of the slope of the condensate pipe, resulting in no slope or even slope, so that the water in the drip tray cannot be discharged, and overflows to the ceiling after the full.
Countermeasures: In order to reduce the ceiling and reduce the rework costs, the drain pipe of the condensate pan was connected to the floor drain of the toilet. The connection of the condensed water pipe from the centralized drainage to the bathroom is changed.
2. Phenomenon: a hotel lobby uses horizontal concealed fan coils, the results of condensed water can not be discharged, turbulent everywhere, a great impact. --Marine air conditioning
Reason: Due to the limitation of civil construction conditions, the condensed water pipes of the fan coils are not graded.
Countermeasure: The building was refurbished, and the condensed water pipe was graded, I=0.01 or more, and the problem was solved.
3. Phenomenon: the ceiling is often wet by the water, in serious cases, the mineral wool ceiling is soaked, and even collapsed.
Reason: The cold water pipe is not well insulated, and the insulation material is not tightly attached to the pipe. As a result, the pipe is insulated with small holes or not tight. The air enters the pipe wall to produce condensed water. The more water is formed, the more it does not necessarily flow out. , wet the ceiling. Seriously, the ceiling of the mineral wool board was soaked, and even the ceiling was collapsed, and the unnecessary consumption of cold was excessive, resulting in waste of energy.
Countermeasures: In addition to the emphasis on construction, the use of insulation materials in the design should emphasize the practice. Polyurethane foam (self-extinguishing) tiles are currently glued to the pipe for good effect or directly foamed with polyester.
4. Phenomenon: A horizontal concealed fan coil of a hotel, condensed water spilled onto the ceiling of the room, wet through the ceiling, destroying the decoration, forced to turn off hundreds of fan coils, resulting in greatly reduced air conditioning load, freezing The machine is not working properly.
the reason:
1) The insulation of cold water pipes, valves and fresh air pipes is foam plastic, and the gaps related to the pipe wall are not well packaged, and a large amount of condensed water is generated, flowing along the cold water pipe, so that the insulation layer does not work.
2) The slope of the condensate pipe is too small, even without slope, causing the condensate in the water collecting pan to overflow and the ceiling decoration to be damaged.
3) Many fan coils have been stopped. The cold water temperature is lower and lower, reaching 2~3°C, and the freezing system is one ring per layer, which is too small. Because the load is too small, it is often forced to stop.
Countermeasures:
1. Reheat the cold water pipes, valves, and fresh air pipes, and use foamed polyurethane to prevent pipe condensate.
2. Adjust the slope and slope direction of the condensate pipe so that the water in the water collection tray can be smoothly drained.
3. Combine the four frozen loops into two loops, which solves the problem of tripping due to small load.
Lesson: There are many examples of such problems and they have a great impact. Especially in some high-end hotels, rooms, halls, etc., architectural decoration teaching is more stressful, luxurious ceilings, beautiful wallpaper, high-grade carpets, and the result of the air conditioning system dripping, all this is destroyed. It is very inconvenient to carry out repairs in front of the guests. What's more, every two days, I get the water on the fan coil of the guest room, otherwise it will go down.