1. Drawing Directory
First list the newly drawn drawings, and then list the selected standard drawings or reused drawings.
2. Home page
The contents include design overview, design description, construction and installation description, legend, equipment list, etc.
For large and complex projects, the homepage can be set according to the different contents of HVAC. Simple project, with several home pages, can be combined in the bottom floor plan. Design overview and description should have indoor and outdoor design parameters of HVAC; Cold source and heat source: parameters of refrigerant and heat medium; HVAC cooling load and heating load; System form and control method; Noise elimination and isolation measures; Anticorrosion and heat preservation requirements; The composition, main design data, selection and control methods of equipment and components, installation requirements and construction and acceptance specifications to be followed of the smoke control system.
3. The floor plan of the building
(1) Draw the building outline, spindle number, axis size, indoor and outdoor ground elevation, room name, and draw the north arrow in the upper right corner of the ground floor plan.
(2) The location of radiators should be drawn in the heating plan, indicating the number or length of radiators, location, quantity, pipeline structure, valves, air release, drainage, fixed brackets, compensators, air intake devices, pressure relief devices, steam traps, pipe trenches and inspection manholes, and indicating the pipe diameter, elevation and installation position of the main pipe.
(3) For multi-storey or high-rise buildings with more than two floors, one drawing can be shared, and the number of radiators should be marked step by step.
(4) The ventilation and air conditioning plan should draw double-line air ducts, single-line cold water pipes, hot water pipes and other water pipes. Equipment drawings shall be drawn using equipment shapes or legends, and the dimensions of air ducts and tuyeres (circular air ducts are standard diameters, rectangular air ducts are standard width x height), positioning dimensions of air-conditioning equipment such as fan coil units and air cabinets, and their related dimensions, equipment numbers, silencers, regulating valves, fire width, fittings, filters, hoses and other components shall be indicated.
4. Sectional view
(1) Cross-sections or local cross-sections shall be drawn for complex parts of air ducts or pipes.
(2) Draw the dimensional relationship between air ducts, pipes, tuyeres, equipment and building beams, plates and columns and the ground.
(3) Indicate the size and elevation of air ducts, tuyeres and pipes.
5. System diagram
(1) When drawing heating system perspective or heating riser diagram, the scale should be consistent with the plan, and 45 or 30 axial projection should be adopted for drawing. Each riser in the system diagram should be numbered, indicating the pipe diameter, slope, slope direction, elevation and radiator model, and all fittings and components such as pipes and valves of the whole system should be drawn.
(2) Pipes of cold and hot water system, cooling water system and condensed water system of air conditioner shall be drawn by 45 or 30 axial projection, and equipment such as water chillers, fan coils, wind cabinets, heat exchangers, pumps and cooling towers shall be represented by legends, or outlines shall be drawn by thin solid lines, and all components and accessories such as pipes and gates of the whole system shall be drawn. All pipes shall be marked with pipe diameter, slope, slope direction, elevation and equipment number.
(3) Large air conditioning and refrigeration equipment and equipment pipelines are complex, so the system flow chart can be drawn. The floors with the same equipment, valves, instruments, components, medium flow direction, pipe diameter and equipment number can be simplified appropriately according to the floor where the equipment pipelines are located, and the flow chart cannot be drawn in proportion.
(4) When the air duct system cannot be clearly represented in the plan and section, the system diagram can be drawn by 45 or 30 axial projection.
(5) For multi-storey or high-rise buildings with more than two floors, only one floor can be drawn, and other floors are omitted and explained by notes.
(6) When there are too many identical pipes and components in the drawing, it is difficult to mark them, you can use notes to explain them. For example, the supply and return branches of a fan coil unit have a diameter of DN20 ".
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6. Manufacturing drawings
(1) For simple equipment and supports, when standard drawings and general drawings are not available, manufacturing drawings, such as water tanks and equipment supports, should be drawn.
(2) Draw the structural diagram of single equipment, indicate the equipment, processing size and requirements, and explain the types and specifications of materials used. Hvac online
7. Installation drawing
(1) Installation drawing refers to the drawing that guides the installation during the installation process, indicating the installation method and relationship between equipment, components and buildings, and drawing the materials used for installation.
(2) The installation drawing should insert the relationship between the installed equipment and the buildings related to the installation.
8. Calculation table (internal use)
(1) heating project: calculation of heat consumption of building envelope, selection of radiator and heating equipment, hydraulic and balance calculation of heating system pipeline, selection calculation of heating system components such as expansion water tank, compensator and steam trap, etc.
(2) Ventilation engineering: calculation of residual heat, moisture and harmful substances, calculation of overall ventilation, local exhaust air volume and exhaust device, calculation of air volume balance and heat balance, and calculation of selection of fans, heaters, filters and other equipment in ventilation system.
(3) Air conditioning engineering: heat transfer calculation of building envelope, heat dissipation and moisture dissipation calculation of human body, lighting and equipment, calculation of return air volume and fresh air volume, calculation of cooling and heating load, selection calculation of equipment such as water chillers, cold water pumps, cooling towers, combined air conditioners, fresh air units, fan coils, noise elimination and vibration isolation devices, calculation of ventilation organization, calculation of air duct size and resistance.
(4) Smoke control engineering: calculation of mechanical pressurization air supply for smoke control stairwell and front room, calculation of smoke control air supply for walkway, calculation of smoke control air supply for room, calculation of smoke control air supply for atrium, and calculation of selection of smoke control fan, air supply outlet, smoke outlet and fire damper.
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