【 Weak current College 】 room air-conditioning installation process

<br> Air conditioning installation is good or bad, is directly related to air conditioning. For the engine room air conditioning, installation process is extremely important, and if it is installed is not qualified in use will constantly run into trouble. During the installation .process often encounter the following issues: <br> <br> 1. engine room air conditioning indoor and outdoor machine more than design limit. <br> 2. room air-conditioning outdoor unit below the indoor unit exceeds the limits of design. < .br> 3. commercial air conditioning units and external unit distance exceeds the limits of design. <br> 4. engine room air conditioning and commercial air conditioning units and the disintegration of handling. <br> 5. According to user requirements will air cooling .unit into cold water unit. <br> 6. According to user requirements change of air conditioning. <br> 7. the ancient architecture of air conditioning equipment installation. <br> 8. special environmental design and installation of air conditioning. <br .> <br> 2009 national quality technology supervision Bureau has issued the air conditioner installation of national standards and provisions from 1 March 2000. Understanding air conditioner installation of national standards for air conditioning installation quality be aware, be able to judge whether the air conditioning installation ., the following is a qualified engineering company in the long-term machine room exclusively used air conditioner installation process summarizes experiences, and share, is for informational purposes only. <br> <br> Standard setup <br> <br> Equipment of second .handling is in place <br> <br> 1. prior to the second handling equipment case / appearance inspection; <br> 2. equipment in place to open a device, check whether the air conditioner check unit parts and technical information in line; .<br> 3. check connect refrigerant brass and copper tube evaporator for visible deformation of small holes, and nitrogen pressure, etc; <br> 4. check other components such as compressors, indoor unit, humidifier, etc. due to transport loose, .or suffer the rough handling and loss or damage; <br> 5. after opening the box equipment and accessories for damage, missing phenomenon; <br> 6. handling equipment to be soft on the device provide appropriate protection to prevent collision damage; < .br> 7. standard of handling interface to any space or room room with any accessibility within the space. <br> 8. equipment location according to design drawings, without drawings: device location for efficient and balanced control of the indoor environment is very important .. Air conditioning system should be as close as possible to the maximum thermal load. The high aspect ratio of the room, along with the longest wall installation system, in order to ensure uniform air distribution. If not installed properly, will likely result in an .exception control or mechanical failure; <br> 9. system front free space shall not be less than 36 "(914mm) to carry out routine maintenance; <br> 10. equipment base recommended 50x50x5mm angle by the actual size of manufacturing, with expansion .bolts fixed to the ground and on the antirust paint brush, if necessary, then brush and device similar like paint; <br> 11. the base must be horizontally, base and device want to place the rubber shockproof mat 10mm, lowering device runtime- .generated vibration and noise; <br> 12. fixed outdoor equipment base, you can use cement pier or steel frame structure, is not allowed to undermine customer waterproof facilities; <br> 13. Outdoor cooling pipe if you need to install the cover, .by mutual consultation. <br> <br> Indoor / outdoor unit refrigeration piping between the copper pipe, copper pipe insulation <br> <br> 1. a copper pipe inner wall installation manual cleaning (including Burr), welding completed high pressure nitrogen .purge, welded joints smooth, no welding tumor; copper tube to: horizontal even vertical, thermal insulation sleeve seams are bonded, pipeline connections: using direct fitting and 900 bend fitting, indoor unit bracket lower ground for good thermal insulation; <br> 2 .. pipeline crossing wall slab: all lines are parallel-like passing through walls; pipeline through wall, plus casing (or hole wall laying rubber vibration isolation pads); pipeline installation finished hole should make appropriate simple seal; pipeline may not cross; <br .> 3. run a report in the wall or ceiling mounting: all pipeline support frame complete, consistent with the strength requirements; metal support frame with brass pipe surface without direct contact; horizontal pipe slope meet design requirements, facilitate the return; <br> .4. Interior pipe if required installation channel, solution by negotiation; <br> 5. condenser is higher than the indoor 6m requires exhaust pipe bending retro save oil; condenser below the indoor unit shall not be less than 5 m. <br> < .br> Responsible for indoor / outdoor power cable and signal wire connection <br> <br> 1. cable to horizontal even vertical, cable insulation, no breakage; <br> 2. when an user when parallel alignment of cable, strap in space .and the direction of the knot should be consistent with the user cable. Signal cable and high current or high-voltage cable separately binding, binding spacing should be greater than 150mm; <br> 3. indoor and outdoor machine between the power cord and signal .cables must be protected and PVC pipe. <br> <br> Inlet connection and drain connection road <br> <br> 1. the client is responsible for fles and drain received equipment, pipes, next to the unit, easy-to- .local installation manual stop valve, the handle may be down for maintenance during quarantine humidifier; if hydraulic above 150PSIG (1034kPa), the customer is responsible for water supply piping system installed pressure relief valve; <br> 2. responsible for pipes and drains connected .to the indoor air conditioners; <br> 3. drain installation guarantee pipe diameter and gradient; <br> 4. do a test of water drainage, sewerage, drainage pipe installation water bends; <br> <br> System check, complete pressure .test and pumping vacuum <br> <br> 1. pipe suppression should start voltage 0.5MPA after 10 minutes, no leaking pressure can be a constant pressure dwell test 1.8MPA, holding time of 12 to 24 hours, the pressure drop before 6h should .not exceed 1%, temperature differenceNot more than 5 ° c, pressure should be less than the rest of the time should 0.18MPA can maintain pressure stability; <br> 2. after the adoption of the system pressure test, you can vacuum systems, .vacuum time depending on the size and the length of the pipeline pump humidity. Vacuum systems, vacuum to 101Kpa. <br> <br> System debug <br> <br> The filling by the engineer in charge of refrigerant, debugging equipment and complete .post service report services reports delivery manufacturers save. <br> <br> On-site training <br> <br> Engineers for on-site training for users, the training includes: Describes the key parts of the equipment; equipment work principle; .the correct switch machine; routine maintenance operations; general alarm failure handling, etc. <br> <br> Inspection service <br> <br> In accordance with the requirements for inspection, check the operation of the equipment and complete inspection service, and .to make service delivery of the user to save the report. <br> <br> Strict quality requirements of materials <br> <br> 1. refrigerant copper tube using deoxyribonucleic copper tube look straight, glossy; no grease and fat black, dark ., serious oxidation phenomena; no crack, no injuries, and other defects; <br> 2. refrigerant copper tube port tube thickness thin uniform; 16mm (5 / 8 ") over the wall thickness of copper tube refrigerant requirements should be ≥ 1.0mm .; <br> 12mm (1 / 2 ") following the refrigerant copper tube wall thickness requirements, not the" 0.7mm; <br> 3. elbow, direct head port tube wall thickness thin uniform; no burrs, Gill; <br> .4. thermal insulation pipe appearance identifies clear, it is recommended to use ARMSTRONG; port tube wall thickness thin uniform, soft, flexible tube wall is good, no flat foam and bubbles and other defects; <br> 5. air conditioning equipment power supply .should be used copper-core cables, and must be a formal manufacturers of fire-retardant cables, cable RVVZ section should meet the air-conditioning equipment in full load operation; <br> 6. cable sheath without damage, no injuries, and other .defects; cable bright luster, with copper color, hair black, dark, serious oxidation phenomena; <br> 7. import and joint venture freon R22 steel bottle and packing tray identity clearly, in order to prevent counterfeit products, with a regular supply station .purchase, recommend the use of DuPont or UniCredit. If SP use inferior refrigerant compressor damage caused by equipment, SP is responsible for the loss. <br> <br> Rational engineering installation cycle <br> <br> 1. equipment handling, preparation .of engineering materials, equipment production base: 1 working days; <br> 2. equipment for pipe welding, power cables, control cables: 2 working days; <br> 3. a pressure test, vacuum: 1 working days; <br> .4. equipment commissioning, on-site training: 1 working day. <br> <br> Complete installation files <br> <br> 1. field survey report <br> 2. equipment acceptance form <br> 3. work schedule < .br> 4. construction safety protocol <br> 5. equipment completed drawings <br> 6. equipment inspection reports <br> <br>.