Table of Contents
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1. Welcome ........................................................................................................................... 4
1.1 To The Installer ........................................................................................................... 4
1.2 To The Owner ............................................................................................................ 4
2. Safety ................................................................................................................................ 5
2.1 Safety Symbols ........................................................................................................... 5
2.2 Safety Precautions ..................................................................................................... 5
3. About ................................................................................................................................. 7
3.1 Components ............................................................................................................... 7
3.2 Specifications ............................................................................................................. 8
3.3 Dimensions ................................................................................................................. 10
4. Installation ......................................................................................................................... 12
4.1 Installation Guidelines ................................................................................................ 12
4.2 What You Will Need ................................................................................................... 13
4.3 Choose an Installation Location ................................................................................. 13
5. Venting .............................................................................................................................. 17
5.1 Venting Requirements ................................................................................................ 17
5.2 Select a Vent Type ..................................................................................................... 19
6. System Plumbing .............................................................................................................. 37
6.1 Pressure Relief Valve Requirements ......................................................................... 37
6.2 Temperature-PRV Requirements .............................................................................. 37
6.3 Connect the Water Heater to the Water Supply ........................................................ 38
6.4 Typical Installations .................................................................................................... 40
6.5 Piping Diagram for Basic Installations ....................................................................... 41
6.6 Piping Diagram for Multiple Unit Installations ............................................................ 42
7. Gas and Power Supply ..................................................................................................... 43
7.1 Connect the Gas Supply ............................................................................................ 43
7.2 Connect Electricity ...................................................................................................... 45
7.3 Pump Controller .......................................................................................................... 47
8. Post-Installation Checklist................................................................................................. 48
9. Maintenance...................................................................................................................... 49
9.1 Replacement Parts ..................................................................................................... 50
9.2 Service/Maintenance Log ........................................................................................... 52
10. Warranty .......................................................................................................................... 53
READ AND SAVE THESE INSTRUCTIONS
Demand Duo
H-Series with SENSEI CX Installation Instructions
3
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