Part 4 Introduction to HVAC Drafting : Part 4 Introduction to HVAC Drafting HVAC Systems Ethier
Topics : Topics Introduction
Building Construction
Drawings
Project HVAC Systems Ethier
Introduction : Introduction HVACR?
Heating Air Conditioning and Refrigeration
Review of Fredericton North School
Leo Hayes Ethier HVAC Systems
Building Construction : Building Construction Role of Architect?
Commissioned to prepare a complete set of drawings
Site Work
Architectural
Structural
Electrical
Mechanical
Form team of Consultants
Project Manager
Design Build
General Contractor, Engineer, Technologist Ethier HVAC Systems
Building Construction : Building Construction Role of Consultant?
Prepare Design for specific Discipline
Prepare Drawings
Liaison between Architect and Contractors
Supervise/inspect contractors work Ethier HVAC Systems
HVAC Equipment and Terminology : HVAC Equipment and Terminology Four Objectives
Knowledge/Vocabulary
Different Systems
Refrigeration Cycle
Air Conditioner Ethier HVAC Systems
Heating Equipment : Heating Equipment BTU versus Calories
British Thermal Unit (1 BTU = 252 cal approx.)
Calorie (4186 joules) or calorie (4.186 joules)
A calorie is the quantity of heat required to raise the temperature of one gram of water, one Celsius degree. (note capital versus lower case)
Combustion Heat
BTU ratings
Quantities versus BTU versus cost per unit Ethier HVAC Systems
Heating Equipment (cont.) : Heating Equipment (cont.) Furnace or Boiler
Electric Heat
Electric Furnace
Heat Pump
Not efficient below freezing (32F OC)
Hydronic Heating Ethier HVAC Systems
Drawings - Lettering : Drawings - Lettering Similar to plumbing drawings
Block lettering / Capitals
2mm for general, 4 mm labels/headings
Romans and Romand font
Use 75% ratio width to height (allows more text) Ethier HVAC Systems
Drawings - Plans : Drawings - Plans Similar to plumbing drawings
Architect often supplies plans at cost
May have to be redrawn from prints
Often too much detail must be simplified
Very fine line weights
HVAC
Outlines stand out, interior finer
All sizes must be indicated and drawn to scale
Details added to provide clarity and elevations Ethier HVAC Systems
Drawings – Title Blocks / Schedules : Drawings – Title Blocks / Schedules Project describes building
Title describes type of drawing and location
Schedules
Systematic method of presenting information
Various components listed
Grilles, diffusers, equipment Ethier HVAC Systems
Project – E2P2 : Project – E2P2 Ethier HVAC Systems
Summary : Summary Introduction
Building Construction
Drawings
Project Ethier HVAC Systems