Table of Contents
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Contents
1. Welcome ......................................................... 3
2. Safety .............................................................. 4
Safety Symbols .................................................... 4
Safety Precautions ............................................... 5
3. About .............................................................. 6
Specifications ....................................................... 6
Dimensions and Connections .............................. 7
4. Installation ........................................................... 8
Installation Guidelines ......................................... 8
Typical Installation Illustrations .......................... 9
Unpack the Demand Duo™ .............................. 10
Choose an Installation Location ....................... 11
Transporting the Demand Duo™ ....................... 13
Earthquake Strapping Instructions .................... 13
Installation Location Checklist .......................... 14
5. Venting .......................................................... 15
Venting Guidelines ............................................ 15
Venting Installation Sequence ........................... 16
Termination Considerations .............................. 16
Select a Vent Type ............................................. 17
READ AND SAVE THESE INSTRUCTIONS
6. System Plumbing ......................................... 35
Pressure Relief Valve Requirements ................. 35
PRV Temperature Requirements ..................... 35
Piping Diagram for Basic Installations ............... 36
Piping Diagram for Multiple Unit Installations . 37
Fill the System .................................................. 38
Condensate ....................................................... 39
7. Gas Supply ..................................................... 41
Connect the Gas Supply .................................... 41
8. Power Supply ................................................ 43
9. Post-Installation Checklist ............................. 45
10. Maintenance ............................................... 46
11. Appendices .................................................. 47
Service/Maintenance Log .................................. 47
Replacement Parts ........................................... 48
Warranty ........................................................... 49
12. Notes ........................................................... 51
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Table of Contents
