2. The placing equipment of indoor and outdoor units should be fixed on a stable and flat foundation or bracket, and the horizontal outdoor unit must be placed in a place with ventilation, light protection, good heat dissipation and no obstacles around.
3. The installation process requires that the vertical position difference between indoor and outdoor units is ≤22m, and the horizontal distance of pipelines is ≤40m. If the position difference is too large, an oil storage elbow should be set every 6m to increase the pipe diameter and reduce the resistance.
4. The specifications of water supply, drainage, water supply pipe and drainage pipe and the specifications of power supply cable shall be led to the actual installation position according to the technical specifications.
5. Install and maintain special tools, such as pressure gauges, vacuum pumps, cutting machines, pipe expanders, welding tools (oxygen, acetylene, nitrogen cylinders), etc.
6. Install and maintain common tools, such as wrenches, screwdrivers, multimeters and ammeters. The quality of air conditioning installation is directly related to the use of air conditioning. The installation process is extremely important for the air conditioning in the computer room. If the installation is unqualified, you will continue to encounter trouble during use.
During the installation process, the following problems are often encountered:
1. The distance between the indoor unit and the outdoor unit of the air conditioner in the machine room exceeds the design limit.
2. The outdoor unit of the air conditioner in the machine room is lower than the indoor unit, exceeding the design limit.
3. The distance between the internal and external units of commercial air conditioning unit exceeds the design limit.
4. Disassembly and handling of computer room air conditioners and commercial air conditioners.
5. According to the user's demand, the air-cooled unit is changed to the water-cooled unit.
6. Change the air supply mode of air conditioner according to user's demand.
7. Installation of air conditioning equipment in ancient buildings.
8. Air conditioning design and installation in special environment.
Precision air conditioning's installation program
Secondary handling of equipment in place.
1. Check the equipment box/appearance before the second handling;
2. After the equipment is in place, turn on the equipment, and check whether the air conditioner and the unit components are consistent with the technical data; 3. Check whether there are obvious pinholes, deformation and nitrogen pressure maintenance between the copper pipes connecting the refrigerant and the evaporator; 4. Check other parts, such as compressor, indoor unit and humidifier. Loose due to transportation, or falling off or damaged due to rough handling;
5. Whether the equipment and accessories are damaged or omitted after unpacking;
6. When handling equipment, use soft objects to provide appropriate protection for the equipment to avoid collision damage; 7. The standard processing interface is any space in the computer room or any barrier-free space on the same floor of the computer room. 8. The location of the equipment shall be implemented according to the design drawings. Without drawings, the location of equipment is very important for an efficient and balanced environment in the control room. The air conditioning system should be as close to the maximum heat load as possible. In a room with high aspect ratio, install the system along the longest wall to ensure uniform airflow distribution. Incorrect installation may lead to abnormal control or mechanical failure;
9. The free space in front of the system should be no less than 36 inches (9 14 mm) for routine maintenance;
10. It is suggested that the equipment base should be made of 50x50x5mm angle steel according to the actual size of the equipment, fixed on the ground with expansion bolts and painted with antirust paint, and painted with topcoat similar to the equipment if necessary;
1 1. The base must be placed horizontally, and 10mm rubber damping pad should be placed between the base and the equipment to reduce the vibration and noise generated when the equipment is running;
12. The outdoor equipment base can be fixed by cement pier or steel frame structure, and it is not allowed to damage the waterproof facilities of customers;
13. If it is necessary to install a cover plate for the outdoor refrigeration pipeline, it shall be settled by both parties through consultation.
The refrigeration pipeline between the indoor unit and the outdoor unit is connected by copper pipes, which are insulated.
1. Before installation, manually clean the inner wall of copper tube (including burr), and after welding, use high-pressure nitrogen to purge, and the weld seam is smooth without flash; Direction of copper pipe: horizontal and vertical, insulation sleeve joint has been bonded, pipeline connection: straight pipe joint and 900 elbow are adopted, and the ground at the lower part of indoor machine support is well insulated;
2. When the pipeline crosses the wall; All pipes run through the wall in parallel; When the pipeline passes through the wall, add casing (or lay rubber vibration isolation pads on the inner wall of the wall hole); After pipeline installation, the hole in the wall should be simply closed; Pipes shall not cross;
3. When the pipeline is installed in the external wall or ceiling; All pipe supports are complete; And meet the strength requirements; The metal support frame is not in direct contact with the surface of the copper tube; The slope of horizontal pipeline meets the design requirements, which is beneficial to oil return;
4. If the indoor pipeline requires the installation of a channel, it shall be settled by both parties through consultation;
5. When the condenser is 6m higher than the indoor unit, it is required to install an oil collector on the exhaust pipe; The condenser shall not be less than 5m of the indoor unit.
Responsible for the connection of indoor/outdoor power cord and signal cord.
1. The cable runs horizontally and vertically, and the cable insulation layer is not damaged;
2. When parallel to the user cable, the spacing of cable ties and the direction of knots should be consistent with the user cable. The signal wire shall be bound separately from the high-current or high-voltage cable, and the binding spacing shall be greater than150 mm; ;
3. The power line and signal line between indoor unit and outdoor unit shall be protected and fixed by PVC pipe;
The water inlet connector is connected with the drainage pipe.
1. The customer is responsible for connecting the water inlet pipe and drain pipe to the equipment. The inlet pipe should be installed with a manual stop valve near the unit for easy operation, and the handle should not be downward, so as to isolate the humidifier during maintenance; If the water pressure is higher than 150 PSIG (1034 kPa), the customer is responsible for installing a pressure reducing valve on the water supply pipeline of the system;
2. Be responsible for connecting the water inlet pipe and drain pipe of the indoor air conditioner;
3. Strictly guarantee the pipe diameter and slope when installing the drainage pipe;
4. Do a good job in water storage and drainage test to ensure smooth drainage, and install a trap in the drainage pipe;
System inspection, complete pressure test and vacuum pumping.
1. The pipeline pressure should be stabilized at 0.5MPA for 10 minute, and the constant pressure maintenance test of 1.8MPA can be conducted without leakage pressure. The holding time is 12 to 24 hours, and the pressure drop in the first 6 hours should not exceed 1%. When the temperature difference is not more than 5℃, the pressure drop should be less than 0. 18 MPA.
2. After the pressure test of the system passes, the system can be vacuumized, and the vacuumizing time depends on the size of the vacuum pump, the length and humidity of the pipeline. Vacuum the system to 10 1 kPa.
The engineer is responsible for filling refrigerant, debugging equipment, filling in the startup service report, and sending the service report to the manufacturer for preservation.
Engineers are responsible for on-site training for users, including: introducing key components of equipment; The working principle of the equipment; Turn the machine on and off correctly; Daily maintenance operation; General alarm fault handling, etc.
Patrol inspection service should be carried out as required, check the equipment operation, fill in the patrol inspection service report, and submit the service report to the user for preservation.
Strict material quality requirements 1. The deoxidized copper tube used as refrigerant copper tube has a straight and bright appearance; No serious oxidation phenomena such as oil stain and blackness; No cracks, scars and other defects; 2. The wall thickness of the refrigerant copper tube port is uniform; The wall thickness of refrigerant copper tubes above 16mm(5/8 ") shall be ≥1.0mm; ; The wall thickness of the refrigerant copper tube below 12mm( 1/ 2 ") shall not be less than 0.7mm；; 3. The wall thickness of elbow and straight-through head port is uniform; No burr and flying thorn; 4. The appearance of the insulation pipe has obvious signs, so Armstrong; Be recommended; The thickness of the port pipe wall is uniform, the pipe wall is soft and elastic, and there are no defects such as collapse and foaming; 5. The power supply of air-conditioning equipment should be copper core cable, and it must be RVVZ flame-retardant cable of regular manufacturers, and the cable section should meet the full load operation of air-conditioning equipment; 6. The outer sheath of the cable has no defects such as damage and scars; The cable core is bright and shiny, with copper color, and there is no serious oxidation phenomenon such as blackening and blackening; 7. Imported and joint venture Freon R22 cylinders and outer packaging cartons are clearly marked. In order to prevent counterfeit products, please go to the regular supply station to buy. Recommend DuPont or Lian Xin. If the compressor of the equipment is damaged due to the use of inferior refrigerant by SP, SP shall be responsible for compensating the loss.
The reasonable project installation period is 1. Equipment handling, engineering material preparation, equipment foundation manufacturing, etc. : 1 working day; 2. Equipment pipeline welding, power line and control line connection, etc. : 2 working days; 3. Pressure test and vacuum pumping: 1 working day; 4. Equipment debugging and on-site training: 1 working day.
Complete installation file
1. Field investigation report
2. Equipment acceptance form
3. Project schedule
4. Building safety agreement
5. Equipment completion drawing
6. Equipment acceptance report