【 Weak current College 】 HVAC engineering construction site coordination and control

Construction content overview
Ventilation air conditioning engineering by ventilation system and air conditioning system. Ventilation system by exhaust fan and duct and duct components, silencer, etc. While the air conditioning system consists of air conditioning and heating source, air handlers, air transportation pipeline transportation and distribution, as well as air conditioning on the indoor temperature, humidity, air speed and cleanliness of automatic control and regulation, etc.
(1) the main function of the ventilation system is sent exhaust, for example smoke control system, positive pressure ventilation systems, air defense ventilation system, kitchen exhaust fumes, bathroom exhaust, etc, through the wind pipe and components to connect, take measures such as vibration noise up dust, detoxification, cooling purposes.
(2) air conditioning system is implemented through the air, exhaust air, refrigeration, heating, humidifying, dehumidifying, air purification, and other projects, improve indoor air quality, meet on temperature, humidity, air speed and cleanness requirements. Air conditioning cold source using various types of chillers; heat source using heat pump chiller, geothermal, electric heater, boiler heating; exhaust air conditioning system with fan; elegant water pumps and water pipe system control; and a central air-conditioning system and central air conditioner terminal equipment, terminal equipment by fan-coil and other parts, etc.
(3) construction of ventilation and air conditioning: main content
1) wind pipes and duct components, muffler, dust collector, fabrication and installation.
2) wind pipes and parts, cooling pipe insulation.
3) Air processor (room), fan-coil and induces, exhaust fan, cooling ducts, chillers or hot and cold water unit, etc. installed.
Construction site coordination points
1. structural engineering construction coordination
Civil structural engineering construction, ventilation and air conditioning primary task is reserved-duct and hot and cold water pipes in the hole, embedded casing and iron. Embedded iron is mainly used for large-diameter ducts and hot and cold water pipe hanging bracket.
(1) reserved hole and embedded casing and iron, with civil progress timely determine elevation, coordinates, position, geometric dimensions of the holes.
(2) holes should be reserved in advance, statistics need wooden box (carton), quantity, specification, processing or entrust themselves prefabricated construction help processing manufacture.
(3) construction of wall, floor reinforced fastening and timely installation of wooden box (carton), need to be reserved in advance and the hole technology leaders determine civil engineering. By civil construction units installed wooden box (carton), ventilation and air conditioning unit is responsible for checking the wooden box (carton) coordinates, elevation, etc are geometric dimensions meet design requirements. After passing the inspection may be notified of civil construction of concrete casting.
(4) structural steel bars is not allowed to arbitrarily cutting, cutting, should report the soil technology, identified remedial programmes after construction.
(5) ventilation air conditioning reserved hole larger, more frequently with water supply and drainage, fire sprinkler, fire hydrant, ELV pipeline and trunking, etc. Timely organization professional Coordination Council, construction drawing bid high, coordinates, and void geometry size too large, pipe laying parallel laying or vertical too much, too dense, collision problem, adjust the elevation and the coordinate of the position, and should be handled in a timely manner with a design change.
(6) the basis for ventilation and air conditioning equipment, room number, pipeline, you need timely submission of various device based geometric dimensions and practices, provide assistance to the civil construction.
(7) smoke using structural wind road from civil construction has been completed, should be checked in a timely manner to prevent structural construction waste left in the air duct, also require civil masonry with cement mortar Trowelling lookout road wall, the gap plugging sealed to prevent leakage.
(8) the roof ventilation and air conditioning equipment, such as roof fan, cooling towers, large, heavy load. The structure of the buildings, the construction of the tower crane dismantling capping, should be transported with large equipment to install the roof of a tower crane.
(9) do waterproof construction, ventilation and air conditioning professionals should smoke fan base location diagram approach to civil engineering, is responsible for construction.
(10) roof do waterproof, ventilation and air conditioning in the roofing of device power management and control of the tube, laying in the waterproofing layer following screed (thermal insulation), power supply and control cable protection against lightning, ground also received the motor mouth rejection or control box interface.
(11) the various air inlet elevation, coordinates, position, geometric dimensions, quantity available to civil construction, at the same time burying check various air meets the design requirements.
2. the renovation construction coordination
(1) the central air conditioning system and heat source host room with equipment room [i.e. freezing room and heat exchange station (including water)], the air conditioning room, computer room, check whether the underlying dimensions meet design requirements and provisions, to drain, power cord, tube and pipe is the line of control technology by equipment in place, construction of the interface map find problems in a timely manner to find related construction units.
(2) check the ventilation and air-conditioning unit is reserved for imports of fresh air vent louvers, quantity, specification size, position, should be consistent with the design requirements. If you have access to timely adjustment of processing orders.
(3) to check the implementation of ventilation and air conditioning reserved hole, embedded rail, casing (with steel casing or waterproof casing), elevation, coordinates, and void of geometry, and check the spacing of embedded iron meets the design requirements, the number is accurate. If omitted a timely find civil negotiation tick chisel patch.
(4) air duct, static pressure Chamber, muffler, fan-coil in the ceiling in construction, civil engineering technology should be timely and responsible implementation of roof-ceiling, ceiling-mounted on the side of the space on the ground elevation, practices. Basis of ventilation and air conditioning with civil construction drawings, professional and other professional coordination and determine the duct as well as other equipment of the best location and reasonable direction.
(5) branch duct and swing opening position and various air dump mouth location, is based on the ceiling practices compartment diagram layout. Civil ceiling joist is not installed, you should put duct insulation construction. Civil seal ceiling, roof, with civil construction will individually adjust straight outlet, and then use the wooden fixed the air outlet.
(6) in the absence of suspended ceiling of parts of pipeline need insulation, such as construction of the wall, ceiling plastering, slurry and other wet operationsConstruction has been completed, and then arrange insulation construction to prevent civil construction personnel pedaling pipeline, pollution effects tube, heat insulation quality.
(7) in a suspended ceiling of parts, if installation duct after finishing operations space, you can first be hanging bracket installed, duct at the time, waiting for repair construction after you install the air channel.
(8) blower fan coil pipe installation height and location that should be based on the construction drawings and construction height of ceiling, considering the downward or lateral air installation. At the same time, and other professional coordination, and determine the connection inlet and outlet of elevation, such as condensate pipe slope after installation.
(9) horizontal subsurface mounted fan-coil motor and roof has more than clear distance 15cm, ensure the motor power cord installation distance.
(10) the use of expansion bolts fixed boom installed air blower plate Tube, you should keep the air blower plate Tube level, adjust the vertical parallel to force uniform, installed securely. Discover expansion bolt holes in the roof on the exploding, Suspender firmly fixed, shall promptly repair holes or shift.
(11) blower fan coil pipe installation, you should be aware of the judgment in and out of the water direction, should face the exhaust outlet, if access points to the left or to the left into the water, in its right is the right into the water, usually vertical Ming loaded coil is back out (input) of water. In short, the access points are at the side of the layout, and export order is entered on the note when the installation is not received the wrong location.
(12) cooling installation should review Tower concrete foundation, should comply with the design, construction drawing size should also be provided with the equipment manufacturer's model number that matches the size of the sample basis.
(13) to check the air defense fresh air duct, exhaust duct of the through-wall cave and wearing floor hole hole size, elevation, the coordinates should be consistent with the design requirements and requirements for pipeline construction.
(14), check whether civil defense piezometric φ 20 above pipe, air defense command center to ± 0 above, outdoor water from powder, ends installed 30cm junction boxes, outdoor box installation operator.
(15) check the filtrate of the through-wall cave room number, the hole size should be consistent with the design requirements.
(16) reserved hole location, elevation is too low or too high, the location offset or skew chisel, tick. To check the number of statistics, reports civil after rejecting chisel. Experience cutting reinforced at the timely request for civil engineering technicians and design allow to implement programmes after construction.
(17) reserved openings due to the construction of the floor or wall plastering layer thickness over design requirements, needs and extending, timely statistical number burying modify hole size.
(18) positive-pressure blowers installed, debugged runs found positive pressure ventilation is not eligible.
1) check the accounting positive pressure ventilator if selection is too small, or fan quality problems such as speed, blades angle does not satisfy the requirements for air volume is not caused by wind pressure and qualified, timely find design on positive pressure ventilator for accounting, or looking for equipment manufacturers to replace the failed fan.
2) check the duct geometry size meets the design requirements, such as duct geometry size too small, you need to recalculate wind pressure, air flow, select appropriate positive-pressure blowers.
3) check whether air duct masonry cracks, gaps too large requirements engineering stopping wipe formation.
4) check whether air duct cleaning the surface roughness or plastering caused excessive wind resistance, resulting in insufficient air pressure and air flow, confirmed by civil construction professionals to repair.
5) fire door sealing performance, resulting in the front room and stairs could not remain top pressure; timely find civil repair fire door, to maintain tight performance, should have positive pressure value.
(19) cooling towers and water pipes should be set by the civil buttress and bracket. By electrician with laying of wires and tubes interface settings to the motor terminal box position, Earth wire to the metal frame, securely and reliably.
(20) all kinds of pipe and duct installation in the ceiling, the air conditioning plumbing should be installed in a side wall, and the parallel laying of sufficient insulation of operation distance, taking and other specialty pipe and trunkings construction order to prevent the collision.
Construction site control focus
(1) ventilation air conditioning engineering construction drawing examination:
1) audit construction drawings by have the legal qualification of design unit design, confirm construction drawings to be used effectively.
Ventilation and air conditioning 2) basis, carefully review construction drawings, found the problem, listing of sites that offer design units, organization design gives the low-down, mapping problem solution file, to be checked to confirm, and prompt for design changes.
(2) audit of ventilation and air conditioning project construction organization plan, focus, room check professional practices, air duct, pipe and coil fan device approach and debug test method.
(3) the technical quality of the low-down shall meet the requirements of ventilation and air conditioning construction drawing within the master project's requirements and provisions, based on existing national standards and specifications.
(4) establishment of ventilation and air conditioning engineering materials, equipment and processing order planning, workforce scheduling, construction schedules, the ventilation and air conditioning plan should ensure the follow up construction plans are not affected. The key is to determine the device's specifications, processing cycle, to date, guarantee the smooth installation of the equipment shall not delay the completion of the duration.
(5) water cooling unit or air cooling units, cooling tower, air blower, air supply unit and other equipment in the building structure construction and lining interior wall and plate hole blocking, you should set aside a large equipment transportation channel.
(6) owners, supervision, construction unit lists their organisation's network, contact the Superintendent name, communication, in order to work in coordination.
(7) air conditioning engineering equipment, air duct, pipe that prior to the installation of various equipment base, fan base, cooling towers, such as the basis for verification to confirm that the correct device installation is allowed.
(8) air duct ventilation engineering and parts production, the material should be considered to determine the scene processing, or order to the manufacturer. On-site production with various processing machinery field sites is to allow the placement, the drop down, you also have to consider off-site processing. If the order to the manufacturer, you should determine the pipe material and provides pipe geometry size, piping componentsSpecification size, connecting pipeline mode, etc., determine the processing cycle, to date.
(9) carefully check the number of reserved hole, geometric dimensions, elevation, coordinates, and so meets the requirements of construction drawings shall not be missed.
(10) the number of check and casing, pipe diameter, elevation, coordinate location meets the requirements of construction drawings shall not be left out, should promptly adjust casing skew towards should horizontal even vertical.
(11) ventilation and air conditioning equipment and accessories for processing orders for manufacturers of control, as described in the book 25-2-1-related content.
(12) HVAC construction with the fire services meet the control:
1) Although 70 ℃ 280 degrees centigrade fire dampers, smoke fire dampers, positive pressure air and exhaust air ventilation system order, are but the fire alarm in the device gets linked control the secondary control connection, by construction, electrical professional units, ventilation units, fire and construction units and equipment supply manufacturers agreed to ensure that fire fighting capabilities.
2) 70 ° c 280 degrees centigrade fire dampers, smoke fire dampers, positive pressure air and exhaust air outlet in acceptance to all construction units participated in joint inspection, the function should be consistent with the fire code (explanation).
(13) the building automation system of ventilation and air-conditioning system, the temperature, flow, pressure, humidity, power and other parameters via analog sensors, digital sensors for computer centralized control. Therefore, request the professional to discuss mutual coordination, processing orders, determine the professional equipment should be provided to the controlled use of active and passive receipt number received points to ensure the smooth implementation of the building automation capabilities, and consistent with existing national standards and norms.
(14) air conditioning construction units, reference should be made to the water supply and drainage professional needs of water points, the pipe diameter size needed and water supply points, while providing the specific location of discharge points.
(15), ventilation and air conditioning construction unit should provide electrical construction units power supply capacity, voltage, current, pipe diameter, wire cross section, the specific power supply point device interface.
(16) indoor ceiling diffuser and back to the air outlet often and lighting, smoke and heat detector etc phase collision, the professional coordination should be timely to the scene.
(17) the aisle ceiling professional pipeline concentrate, duct outlets, lighting, smoke detector, ELV trunking, drainage pipes, fire sprinkler pipe, spray top frequently met, before construction in order to avoid the professional touch, between pipe should be timely convening of ACC, arranged for various professional pipe elevation staggered, location staggered. Ventilation pipes to one side of the wall, to other professional pipeline leave allowance. Other pipeline first to give non-pressure pipes, pressure pipe and wire pipe penetrations. Comprehensive coordination should verify the actual size in the field, so to adjust the layout most sure.