HVAC Construction Drawing Requirements

1. Floor plan   

1) The floor plan shall show the outline of the building, major axis numbers, axis dimensions, indoor and outdoor ground elevations, and room names. A compass should be drawn on the first floor plan;

2) Heating plan should draw the location of radiators, indicating the number of pieces or length, the location and number of heating trunk pipes and risers, the location of valves, bleeders, drains, fixed support frames, compensators, inlet devices, pressure reducing devices, water evacuators, pipe trenches and inspection manholes. Indicate dry pipe diameter and elevation, slope;

3) Ventilation, air-conditioning plans should be drawn with double lines for air ducts, and single lines for air-conditioning pipelines for hot and cold water, condensate, and so on. Drawings should be marked duct size, elevation and outlet size (circular duct note in the pipe diameter, rectangular duct width × height), should also be marked water pipe diameter and elevation, as well as a variety of equipment and outlet installation of positioning dimensions and numbering, should also indicate the muffler, control valves, fire valves, and other parts of the location and air ducts, the airflow direction of the air outlet.

2. Detailed drawing   

Sample detailed drawings of heating, ventilation, air conditioning, refrigeration systems, a variety of equipment and parts of the construction and installation practices, when the use of standard atlas, should indicate the use of the atlas, the general map of the map name, map number and page number. Where there is no ready-made drawings to choose from, and the need to communicate the design intent, the need to draw detailed drawings. Simple detailed drawings, can be cited on the map, drawn in the blank space of the map. Equipment, fittings and other production details or installation of complex details should be drawn separately.

3. System or riser diagrams   

System diagram or riser diagram can show the relationship between the system and space, also known as perspective drawing. When the plan can not be expressed clearly should be drawn perspective drawings, the scale should be consistent with the plan, according to 45 ° or 30 ° axonometric projection drawing. Multi-storey, high-rise building centralised heating system, can draw heating riser diagram, and should be numbered. The above drawings should indicate the pipe diameter, slope direction, elevation, radiator type and number. When the cooling and heating branch water lines of air-conditioning are transported vertically, riser drawings shall also be drawn and numbered, and the pipe diameter, slope, elevation and model of air-conditioner shall also be indicated.

4. Sections or partial sections   

Sections or partial sections, indicating the relationship between air ducts or pipes and equipment connected to the cross-complex parts. The drawing should indicate the dimensional relationship between ducts, water pipes, air outlets, equipment, etc. and building beams, slabs, columns and floors, as well as the positioning dimensions and elevation of ducts, air outlets, water pipes, etc., the direction of airflow and the index number of the detailed drawing.

By Sammi