HVAC Wiring by TOjTsy6R

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									HVAC Wiring
Understanding Wiring
             HVAC Wiring


• Wiring
  diagrams are
  road maps
  for electron
  flow
               HVAC Wiring


HVAC Technicians
  must know:
• How to draw them
• How to read them
                   HVAC Wiring
Drawing diagrams          Draw a diagram a main single
• Begin with a            pole/single throw switch that controls
  description of how
                          all loads. A single pole/single throw
  the circuit is too work
                       switch controlling a 60w bulb. A
                       single pole/single throw switch
                       controlling two 40w bulbs connected
                       in parallel. A single pole/double
                       throw switch controlling a 40w bulb
                       in one position and two 60w bulbs
                       wired in series controlled when the
                       single pole/double throw switch is in
                       the other position.
              HVAC Wiring


Drawing diagrams
• Next Create a
  Written flow
  chart
                  HVAC Wiring


Drawing diagrams
• Use the flow chart
  to complete a
  Ladder Diagram
• Place the switch
  that controls
  everything of L1
                  HVAC Wiring
Drawing diagrams
• Using the flow
  chart add a
  circuit that add a
  branch circuit
• Place a spst
  switch in series
  with a 60w bulb
                    HVAC Wiring


Drawing diagrams
• Use the flow chart
  to complete a
  Ladder Diagram
• Now place the next
  switch in the circuit
                    HVAC Wiring


Drawing diagrams
• Use the flow chart
  to complete a
  Ladder Diagram
• Place the bulbs
  controlled by the
  switch in the circuit
                    HVAC Wiring


Drawing diagrams
• Use the flow chart
  to complete a
  Ladder Diagram
• Complete the
  ladder with the last
  circuit
HVAC Wiring


Drawing diagrams
• Use the Ladder
  Diagram to wire the
  project board
• Wire one branch at
  a time
HVAC Wiring


Drawing diagrams
• Note how since L1
  power has been
  brought to SW1
  that is where we
  can pick up power
  for the next switch
HVAC Wiring


Drawing diagrams
• Note how since N
  or L2 has been
  brought to Bulb 1
  we use any terminal
  that has a direct
  line back to N/L2
  as a connection to
  N/L2
HVAC Wiring


Drawing diagrams
• Complete project
HVAC Wiring


Drawing diagrams
• Note alternate L1
  connections

								
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