Weak current College】 【air-conditioning installation technology programme 1.

<br> 4 air conditioning duct system construction technology <br> 4.1 construction preparations <br> 4.1.1 technical preparation <br> 4.1.2 job site layout <br> 4.1.3 prepare for the construction of machines and construction equipment plan preparation .processing, assembling, installation and engineering equipment, usage should be carefully prior to familiarize yourself with its mechanical structure, performance, purpose and method of operation and has custody, making periodic inspection system to facilitate construction. <br> 4.2 process flow <br> .4.3 ventilation pipes and parts of preparing <br> 4.3.1 air, air valve and other parts are purchased from the manufacturer of the finished product installation, its models, specifications should meet the design requirements, fire damper shall comply with the relevant provisions. .<br> 4.3.2 duct various hangers in the light of the wind pipe hangers (T616) standard Atlas for processing. <br> 4.3.3 air duct is made with galvanized sheet metal thickness meets the design requirements, its quality should be consistent .with national standards, and quality reports. Its procedures are as follows: determine sheet → lines → shear → bite → volume Park or recipes → → riveting exploration; flange steel flange cutting → welding ¡ .ú drilling (punching) → grinding → anticorrosion 4.3.4 the specific requirements of a ventilated air duct selection is made of galvanized steel sheet thickness when rectangular duct length or circular duct diameter according to the following basis: <br> Tube diameter or long edge .size mm wall thickness <320340-450480-1000> 11201320 - 4000 mm0.500.600.801.001.20 flange L25 * 4L25 * 4L30 * 4L40 * 4L40 * 4 <br> B £ ® metal pipe and fittings for the outside diameter or side .length tolerances ≤ 300mm as-1mm ~ 0mm, ≥ 300mm flange for-2mm. internal diameter or side length dimension tolerance + 1 ~ 2mm 3mm, flatness, diagonal difference of not more than 3mm.c. flange connection with flange, flange width should .be smooth and should be consistent, and should not be less than 6mm, no cracks and holes. <br> D £ ® adopt no LAN connection, its connection form, size, must comply with the specifications for ventilation 97 3.1.10-table .1-3 of the request, the interface should be used for machining, the exact size, shape and strict rules, interface. <br> 4.4 ventilation pipes and parts of the installation: <br> 4.4.1 the wind pipe and components before .installing, you should clean up the site, the obstacles, the prepare and check the required Setup tool, according to the design and processing sketches on the pipeline and hangers for drop line or position. <br> 4.4.2 hangers: measuring, setting .-out based on reliable fixed hanger, neat and tidy, horizontal air support spacing meet the design requirements. Shall not be located in the hanger, valves, check vent door hanger at, nor the hanging a flange, insulation duct and hangers cushion thermal insulation .thickness greater than 5mm wood, length is 100 mm. <br> 4.4.3 duct installation: duct installation before internal clean-up, check the tightness of the tube and pipe interface flatness, according to the number of the processing sketch on the ground ., the preinstalled groups according to the diameter hoisting capacity and size, the situation should be more section group received to improve work efficiency. Horizontal wind pipe installation error in no more than 1 / 1000, full length not exceeding 20mm. flange gasket material using closed .-cell sponge rubber slats, lath interface should join the wrong mouth, should be closely after draught, the roof of the duct is set on the requested design, and wellhead waterproof covers and sealing. <br> 4.4.4 duct air valve and adjusting .device shall be mounted on the easy-to-use location fire damper installation should comply with the design requirements of the direction, fusible parts installed in ventilation surface. Air outlet installation location should be correct, the rotation portion of the flexible, flat, exposed .parts of the room height should be consistent, neat and tidy, and the duct outlet should be firmly attached, installation level degree tolerance 5 mm. <br> 4.4.5 duct installation process, the project halted when duct diffusers used plastic sealing. < .br> 4.4.6 using LAN connection cannot be the connector must be tight, rectangular duct sealing corners must be positioned and shall not be wrong and distorted. <br> 4.4.7 installing with flexible hoses should be moderate elasticity, shall not be distorted .. <br> 4.5 tightness testing and air-conditioning piping conditioining for air conditioning system, the amount of air leaking air hose has a direct impact on the air conditioning effect, must be strictly in accordance with the relevant specifications for test and test. < .br> 4.5.1 air conditioning duct processing has been completed, you must insert interface, flange flange for Visual inspection, no crack or fissure. <br> 4.5.2 duct after installation must be carried out using a leaky detection, lamp 150W with .protection cover for low-voltage lighting bulb, light source placed in the inside air duct. Lighting along the seams are slow-moving, on the other side observation records, the inspection results must comply with the specifications provided, must be reworked. <br .> 4.5.3 leaked test before system conditioining. <br> 4.5.4 the scope according to the air and process, the duct is divided into independent system, individually on each system for measurement of air leakage. <br> 4.5.5 the .question to test all the air ventilation systems are used plastic seal is tight, and there is a dedicated into the air; <br> 4.5.6 tests using special variable air volume tester, tuned system air supply pressure from imports, pressure balance, the .fan will automatically adjust air volume, according to the size of the invigorating air flow to determine the amount of air leakage; <br> 4.5.7 for the air-conditioning piping, are generally low-voltage systems, working pressure is less than when .500Pa, system test, leakage of 100Pa selection must be no greater than 2.11m3/h.m2. <br> 4.6 air-conditioning equipment installation <br> 4.6.1 water pump, air conditioner installation should be in accordance with the General equipment .installation and acceptance of, and the owners of the underlying certificate acceptance, on the basis of the size of the device, the intensity, location coordinates are checked for quality, on-line, dressing. EquipmentOut of the box should check box number and crates .and packaging, press equipment list specifications, model matching, recording equipment for defects, and random-certification, brochures, and other technical information. Out of the box should invite the owner, joint supervision unit. <br> 4.6.2 equipment should follow .the device specifications and construction drawings and the corresponding construction specifications for installation, as required for the installation of the vibration facilities. <br> 4.7 pump installation <br> 4.7.1 all pump installation should have pad, pad model according to the equipment required .. <br> 4.7.2 unit return pipe repair side should be left. <br> 4.7.3 give back to the absorption of shock hose nozzle should be set. <br> 4.7.4 plumbing installation may not exert any pressure to pump .. <br> 4.7.5 pump installation standard deviation: vertical ¡ .ü 0.1/1000, horizontal ¡ .ü 0.2/1000.4.7.6 test with oil lubrication and cooling. <br> 4.8 air-conditioning unit installed <br> 4.8.1 air-conditioning unit installed before cleaning up foreign objects inside the box. <br> 4.8.2 unit basis .should be higher than the room amlodipine exceeding, and should be smooth. <br> 4.8.3 unit at the bottom of the condensation water discharges should have the seal. <br> 4.8.4 the features section of the connection should be between strict ., smooth, firm and flexible inspection door. <br> 4.8.5 field Assembly of the air conditioning unit must do conditioining. <br> 4.9 fan installation <br> 4.9.1 amlodipine fan should be installed on a firm, set up under .the cushions, level deviation: horizontal 0.3/1000, longitudinal 0.2/1000.4.9.2 hoisting of solid fan, hanger, design should be consistent with, and to set the damping device. <br> 4.9.3 impeller rotation should be conducted in line .with the design, the exposed parts set shield power. <br> 4.9.4 lifting strapping points should not be on the transmission parts and casings should be made on the base bear primary weight, to prevent damage to devices, precision and dynamic balance. .<br> 4.10 muffler installation <br> 4.10.1 muffler appearance should be formed, there should be clear bump, scratch and corrosion phenomena. <br> 4.10.2 outsourcing glass fabric should not damage, wind of intact, securing screws must not .loose phenomenon. <br> 4.10.3 perforation plate surface should be clean and no corrosion. <br> 4.10.4 installed in the right direction, and each muffler should separate bracket. <br> 4.11 blower fan coil pipe installation should check whether .the motor models meet design requirements, whether expressly, by turning the hand wheel movement should be springy and check the motor insulation, and internal clean and do 1.5 times the working pressure of the hydraulic pressure test. Installation location should be correct, hangers fixed to .laminate, and cushions, there should be 3 ‰ drainage slope, so that condensation water flows to the specified location. Valve and water filters should be as close as possible to install the fan coil, into the return pipe Department with metal hose. Hanger fixed .expansion bolt must be used, shall adopt the nail-expanding. <br> 4.11.1 Air processor inlet and outlet of the length of flexible connection, typically the seams should 150mm firm, tight, shall not be used as a reducer. Air processor .internal should be clean, test before sealing. <br>.