Weak current College】 【air-conditioning-section v-air conditioning system for the maintenance and management-Power By】 【China power house network.

<br> «Ò» ¡ .¢ air conditioning system maintenance and administration of significance to the air conditioning system management including the air conditioning system operation management and ongoing maintenance, the two major content. The so-called operational management is determined according to the actual situation of building air-conditioning system .running programmes, so that the air conditioning system in energy saving, suitable conditions of work, both to meet users' requirements, and achieve economic operation. The daily maintenance of air conditioning system refers to the property management company on the air conditioning system to run .the process in a timely manner to ensure the normal operation of air conditioning system, make use of a building functionality to maximize the play. 2. air conditioning systems operation and management of air conditioning systems operation and management of the most important work is the system .of conditioning. Air conditioning system in year-round operation, indoor hot, wet itself will load as the production conditions and indoor personnel changes. Therefore, the air conditioning system in year-round operation period cannot routinely run at full load, which must be .carried out under load changes can guarantee operational regulation, indoor temperature and humidity requirements. 1. centralized air-conditioning system regulating the way regulation content change heating ① dew point control (cooling) air thermal <br> ② adjust the proportion of fresh air < .br> ③ adjusting washer (or heat exchanger) of water temperature regulating valves regulating ① coil in chilled water or hot water flow <br> ② changes in the fresh air bypass valve adjustment, heated or cooled air ratio control humidity regulation ① dew point temperature .<br> ② control air water vapour partial pressure <br> ③ using solid or liquid moisture wet air volume regulation for reducing ① adjustable fan speed <br> ② Regulation of air flow control valve 2 £ ® fan-coil air conditioning system regulating the .way regulation content regulation water conditioning installation in fan-coil water supply pipe on second-pass or three-way valves to increase or decrease the coil in the flow of cold water, changing the room air absorption heat capacity adjustment air conditioning fan speed, speed .or slow changes through the coil of the air flow is also changing, room air in the coil in the amount of heat changes (2) fan coil system with year-round operation control when the system is not responsible for the Interior of the fresh air .of sensible heat load, just fresh air into and the same can be at room temperature. Fresh air on the room temperature does not effect, and the coil bear all indoor sensible heat load, fan-coil partially adjusted to meet the indoor temperature and humidity .requirements. <br> When the system air supply required to bear enclosure temperature heat caused by cold (hot) load, available in the fresh air treatment equipment of heating (cooling) is set to rise (lower) outdoor air temperature. <br> .Double-pipe fan coil system, at the same time to all fan-coil temperature of the water supply of the same. In transitional season runs, with the outdoor temperature reduction should focus on regulating the heat contained in the fresh air, outdoor air temperature .gradually rise to offset changes in heat load. At this point, enter the coil temperature remains the same, fan-coil by water conditioning, eliminate indoor short-time load change. 3. maintenance of air conditioning systems in air conditioning systems maintenance process, .often encounter some system failure, maintenance managers to carefully analyse the cause of the failure, and adjust the system so that the air conditioning system meet the design requirements. Now on frequent air conditioning system failures and their causes and solutions profile as follows. The symptom .occurs because solution actually excessive ① air duct system is less than the design resistance, resistance to air increase <br> <br> ② Select the design-time forced draft fan, air flow or pressure too high, so that the actual air increase ① .if air slightly larger than the design flow, in indoor air and noise values allowed, can not be adjusted <br> <br> ② by changing the fan speed regulation of methods, to change fan speeds without conditions, available change duct control valve to .open degree air volume regulation of methods and the symptom occurs because continued solution actual air too small ① system actual air resistance is greater than the design calculation of the resistance, the air conditioning system to reduce the actual air <br> <br> ② air .supply systems wind road air leakage <br> <br> ③ blower quality is not good, or forced draft fan does not meet the requirements, or air conditioning system running on the fan run mismanagement ① on wind tube components for transformation (as in duct .bend in addition vanes, etc.) to reduce the air resistance <br> <br> ② on air distribution system for leak detection, the high speed of air supply system leak detection test, the low speed of air supply system should focus on quality .inspection flange and gasket leaks, air handling, inspection, inspection hole sealing for strictly leakage <br> <br> ③ replacement or adjustment of fan, bring it in line with the work parameters require air status parameter does not match with the design conditions ① .design calculation errors, the air treatment equipment capacity and actual needs of the deviation of the larger ② equipment performance bad or installation quality is not good, can not reach the parameter requirements for air conditioning system and heat ③ mordant's parameters and traffic do not meet design .requirements ④ air cooling device export with water, such as retaining plate over water more than design estimate, causing moisture to evaporate ⑤ blowers and air duct temperature (the temperature drop) exceed the design value, impact wind road air temperature ⑥ in negative pressure of .air handling unit and back to adjust air duct leakage ① imports and hot media and flow parameters to improve the capacity of the air treatment equipment, to meet the requirements of air status parameters. If regulation still can not change the capacity of the air treatment, .you should replace the air treatment equipment ② when hot and cold media parameters and traffic do not meet design requirements, you should check the frozen system or the heat source of processing power, see if they could meet the requirements of operating parameters. Also, the .delivery lift of pump check whether there is a problem, as well as hot and cold medium pipe insulation measures or internal pipeline is blocking the exit air ③ cooling with water, the surface of the cooler system, followed by addition of retaining plates to enhance the .effect of retaining water; if in the washer system, you should check the retaining plate is plugged into the bottom of the ponds, water and air treatment is there between indoor wall, ④ air blowers and air duct temperature (the temperature drop) is too .large, you should check the causes of excessive. If the air blower operation overpressure, temperature rise should take measures to reduce wind pressures forced draft fan running. If the pipe temperature (the temperature drop) is too large, you should check the pipe insulation .measures the propriety of indoor air parameters not set ① actual heat meter requires moisture load and design calculation load, or air parameters do not meet design requirements ② indoor airflow speed exceeds allowed value ③ indoor air cleanliness isn't what ① according to fan and air treatment .equipment's ability to determine the air and air parameters. If conditions permit, may take measures to reduce the building envelope of heat radiation and indoor heat production by increasing ② air area to reduce the air speed or decrease air and changing the air forms, and other .measures to improve indoor air flow speed ③ frequently check the filter's efficiency and quality, increase the number of air conditioning room ventilation and indoor positive pressure value, improve management measures to improve indoor air cleanliness, air-conditioning equipment maintenance 1. air conditioning unit maintenance .maintenance of air conditioning unit mainly consists of air conditioning unit inspection and cleaning. Air conditioning unit checking and cleaning required in outage, generally 2 to 3 people in accordance with the procedure provided for in advance. Check off the valve, open the access door for .internal inspection of air conditioning units, removal filter, check the coil and fan blades of pollution levels and completely wiped clean. Check the clean the coils and the combination of corrosion and bolts fastening and operating Department add oil. The filter in the machine, clean ., dry sound installation at a later date, if any damage should be repaired or replaced. <br> Internal check is finished, close the door, open the valve, and air conditioning units outside of wiped clean, then codition. Codition must note running .current, motor temperature rise, the transmission of vibration and noise, etc. Codition is finished and then run the test, run the test-time checks of air temperature and air temperature is normal, the water inlet valve and the valve motion is reliable and .correct, temperature setting is sensitive. Everything is normal, the air-conditioners can be officially put into use. 2. blower fan coil pipe maintenance device name project inspection project maintenance project cycle air filter filter surface dirt, water cleaning once / month coil fin .tube surface dirt, cleaning 2 times / year tubes of corrosive cleaning 2 times / year continued device name project inspection project maintenance project cycle fan impeller contamination dirt, noise, clean up the impeller 2 times / year drip trays drip tray drainage cleaning dust and water .plate 2 times / year pipe insulation, automatic valve actuation timely repair 3. heat exchangers to maintain heat exchangers maintenance including heat exchangers and finned surface cleaning of heat exchanger fouling. Clear the dirt layer commonly used methods are compressed air pollution, hand or mechanical decontamination .and chemical cleaning. 4. maintenance of centrifugal fan in ventilation and air-conditioning system, the number of fan is very large, maintenance work including small repair and overhaul of two parts, see the following table. Maintenance repair content repair ① cleaning, inspection .of bearings <br> ② fastening parts bolt, adjust the belt of tightness and coupling gap and axiality <br> ③ replace lubricants and seals <br> ④ repair and wind control valve repair overhaul ① small such as content, the disintegration of the cleaning ., check all parts <br> ② repair, replacement of rolling bearing <br> ③ to repair or replace the shaft and impeller, and static and dynamic balancing of the impeller validated five or refrigerating room maintenance and management 1. refrigeration room management content and .require refrigeration room management mainly on the installation of refrigeration equipment management and maintenance of refrigeration room management aims to ensure the safe operation of the refrigeration equipment. The key of the refrigeration room management is monitoring system running status, in the event of system failure, to .take appropriate measures in a timely manner and to signal, in order to ensure the safe operation of the system. <br> On the device in the refrigeration room must have a reliable maintenance, equipment maintenance as shown in the following table. Maintenance requirements for .maintenance of content do equipment lubrication ① equipment lubrication to be fixed, fixed, qualitative, quantitative, timing and third-level filter (oil drum, oilcan, refueling points) <br> ② all filters must satisfy the following requirements: refrigeration oil, machine .oil and so the filter, level filtering is 60 mm, second level filter for 80 head, three-level filtering for 100 mesh; petrol tank, the gear oil strainer, level 40 mm to 60 mm, L2, L3-80 mm <br .> ③ to regularly check the mesh, the oil level and oil temperature, oil pressure and the oil pump oil quantity, abnormal findings shall be processed in a timely manner <br> ④ regular checks of lubricating parts such as bearings, temperature, sound is .normal <br> ⑤ common valve screw and nut, regular oil lubrication, no common valve screw, nut, with oil seals dead; lubricating oil apparatus to regular checks, regular cleaning or replacement to the engine room equipment circuit inspection ① checking on parts of .pressure, temperature, liquid level <br> ② check drive belt, chain of fastening and smooth degree <br> ③ check the fastening bolts is loose, equipment operating in non-exception vibration and noise <br> ④ inspection control of measuring instruments and .the regulator's work continued maintenance of the required maintenance content doing roving on room equipment inspections ⑤ check cooling system work; check valve, brake and accident alarm device is good <br> ⑥ check safety shield and railing is good <br> ⑦ check the seal .point have no leaks be civilized production ① operator must be responsible for equipment, piping, instrumentation and post carefully cleaning the environment, improve health, no oil, no ash, axis light, Groove bottom, equipment see true colors <br> ② anticorrosion insulation .layer to maintain integrity <br> ③ the timely elimination of run, run, drip, leak <br> ④ each frequency should carefully fill in the running record, do shift work equipment 2. refrigeration units for maintenance management (1) compression chiller maintenance .management currently vapor compression chiller of the degree of automation is high, the unit has an automatic safety protection measures, such as exhaust and inlet pressure safety protection, oil and cooling water security, etc. <br> In steam compression chiller operation management process, .it is necessary to pay attention to the safe use of refrigerant. Freon refrigerant leakage class, the contact with the flame, it will explode out of the highly toxic substances phosgene. In addition, the freon to ozone layer destruction in the atmosphere was extremely serious ., would endanger human health and the ecological balance of the EarthSo the use of freon safety top priority is to reduce leakage and improve the recovery of the refrigerant. Ammonia refrigerants inflammable, explosive, and therefore to prevent the leakage of refrigerant in the refrigeration room must .have a reliable security measures, such as ammonia concentration alarm equipment, accident exhaust devices, etc. <br> All waste shall direct refrigerant emissions into the atmosphere or sewer, must, in accordance with the provisions of the environmental sector, pending recovery after repeated .use. (2) absorption chiller maintenance management steam LIBR chillers also have corresponding automatic protection devices, such as low-temperature protection, local non-crystalline protection and downtime, Crystal protection for direct-fired LIBR absorption chiller, there are other special protection measures ., such as safety ignition system, combustion pressure protection device and flame safety devices, etc. <br> As a result of LIBR absorption chiller crystallization at run time and the unit easy to break in a vacuum, so its operation management than steam compression refrigerating .machine complex, to develop specialized maintenance plan. 3. cooling tower maintenance maintenance requirements for maintenance of the content that flows evenly distributed ① in water distribution and packing in the cooling water to uniform layout, with water to regular cleaning of the boiler scale, rust .and other impurities to prevent clogging ② if distribution is already damaged to timely repair ③ on packing to periodically clear the surface of the boiler scale, dirt, use a high pressure water flushing, such as packing broken damage, to timely replacement ④ set water, .packing and distribution, if you have Moss algae or oil dirt, easy plug impede flow, free bleaching powder or sodium hypochlorite solution and control free chlorine in 0.5mg / L range ensures uniform air distribution ① in running, produce an uneven distribution of air, .in addition to filling in the scale and dirt clogging, there is also an important reason, is freezing phenomenon impeded airflow, allowing air into the reduced cooling ② icy parts are usually in the cooling tower of the air inlet, shutters, the packing of the .bottom edge and ③ preventive measures are periodically clear packing scale and dirt in; increase the water flow, while fans can stop working; guarantee the normal operation of fan or regular sewage water treatment control cooling tower water turbidity is not greater than 50mg / L, .water running under regular sewage or water quality treatment in winter-NET Tower memory water during the winter months should take appropriate measures to set water placed in electroheat installations and prevent Frost crack leaks water collection. If no cooling tower, water drained net Tower memory.