Atwood 89-III DC Manuals

Table of Contents

• 2

  Recommended Tools & Equipment

  • 3

    Table of Contents

• 4

  79/80 Series Model Identification

  • 5

    79-II Directional Air Box Insert

• 6

  85 Series Model Identification

  • 7

    Model Identification

• 8

  Wiring Diagrams 7900-II/8000-II Series

  • 10

    8500 Series
  • 12

    8900-III Series & 79 / 85 / 89 with Blower Control Ignition Board
  • 13

    2-Stage Furnace & Diagnostic Chart

• 14

  Model 1H2C Digital Thermostat

• 15

  Model 2H2C Digital Thermostat

  • 15

    Furnace Operation
  • 15

    Fan Operation
  • 17

    DC Models (2-Stage Excalibur ™ )

• 18

  Sequence of Operation

  • 18

    Pilot Models
  • 19

    AC Models

• 20

  Safety & Warnings

• 21

  Annual Preventative Maintenance Inspection

  • 22

    Mechanical Thermostat
  • 23

    Circuit Breaker & Motor
  • 23

    Circuit Boards
  • 24

    Relay
  • 24

    Sail Switch
  • 24

    Limit Switch
  • 25

    Dual Solenoid Gas Valve
  • 25

    Burner Head, Electrode & Valve Assembly
  • 26

    The 4 Always (Gas Pressure, Voltage, Ducting, Return Air)
    • 26

      Gas Pressure
    • 27

      Return Air
  • 29

    Thermostat
  • 30

    Electronic Ignition Models
  • 31

    Electronic Ignition Models
  • 32

    Pilot Model
  • 33

    Pilot Model

• 34

  Furnace Terminology

• 36

  Return Goods Policy ( RETURN ADDRESS )

• 36

  Warranty Procedures

• 37

  Warranty

• 38

  Flat Rate Schedule

  • 39

    7900-II/8000-II Series
  • 40

    8500-III Series
  • 41

    8500-IV Series
  • 42

    8900-III Series
  • 43

    2-Stage Model 1522 & 2334
  • 44

    2-Stage Model 2540
  • 45

    85-IV 16, 85-IV 20, 85-IV 25, 85-IV 31, 85-IV 35, 1522, 2334 2 - Stage & R-25

• 46

  Replacement Part Reference

  • 48

    7912-II, 7900-II 16 & 20, 8012-II, 85-III 16-20, 85-III 25, 85-III 31-35, 89-III DC, 89-III Ac, 2540 2 - Stage
  • 53

    85-II 16-20, 85-II 25, 82-II 31-35, 89-I DC, 89-I Ac, 89-II DC, 89-II Ac, Fa 79D, Fa 79P, Hf 80D, Hf 80P
  • 56

    85-I 16-20, 85-I 25, 85-I 31-35, Dc82 25-32, Dc82 35-41, Ac 82, Fa 76D, Fa 78 25-32, Fa 72D, Fa 72P

• 58

  Atwood Furnace Installation Parts