Type of control system
            Mill volt
            24 V
            Hybrid  24 volt and circuit boards   using Ic or transistors
            Hybrid  24 volt  and micro processor  boards
            Digital

Schematics
            Types
            Parts of
            Symbols

Controls
            What are they
            Seniors used with controls
            Things used as seniors

Power sourse
            Millvolt  self contrained
            24 volts

System Power Supplies
            Three Phase Delta  
            Three phase Why
            Three phase Delta Wild leg
            Single phase

Protection
            Fuse’s
            Circuit bracers
            Thermal overloads

Item involved in the control circuit
            Basic on off
            Modulating
            Valves
            The control Loop

Thermostats
            Different types
            Variables involved

Relays
            Type
            Purpose

Fan and limit
            Purpose
            Types
            Oil fired equip
            Gas fired equip

Defrost controls           

Pressure switches
            Type
            Purpose
            Ranges

Thermocouple

Thermopile

Hot surface ignition

• Economizer
              Principle
              Control flow
              Physical layout
              Control
                  Relay

  •      Limite controls

  •      Electroic

Step controllers

Schematic and flowing the circuit

Ladder diagrams

Brief Discussion on digital and computer control

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Electrical Control System

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Master and Journeyman continuning education credits