2 • Residen al Tankless Gas Water Heater Use and Care Guide
TABLE OF CONTENT
WATER HEATER BASICS ....................................................................................4
COMPONENT VIEW (X3® Model Shown) ..................................................................................................4
TYPICAL INSTALLATION (X3® Model Shown)..............................................................................................5
DIMENSIONS .............................................................................................................................................6
SUPPLY CONNECTIONS ..............................................................................................................................7
SPECIFICATIONS .........................................................................................................................................8
IMPORTANT SAFETY INFORMATION .................................................................9
RISKS DURING INSTALLATION AND MAINTENANCE ................................................................................10
RISKS DURING OPERATION ......................................................................................................................10
GETTING STARTED .........................................................................................12
Read Before InstallaƟ on ..........................................................................................................................12
Included Items .........................................................................................................................................14
Available Accessories ..............................................................................................................................15
INSTALLATION................................................................................................17
InstallaƟ on Environment .........................................................................................................................17
Unit Clearances .......................................................................................................................................17
MounƟ ng the Water Heater ...................................................................................................................17
CombusƟ on and VenƟ ng InstallaƟ on ......................................................................................................18
VenƟ ng ....................................................................................................................................................21
Installing the Vent Pipe. ..........................................................................................................................23
Exhaust Vent for Indoor InstallaƟ on ........................................................................................................23
Clearances for Sidewall TerminaƟ ons .....................................................................................................28
Clearances for RooŌ op TerminaƟ ons ......................................................................................................29
Exhaust VenƟ ng for Outdoor InstallaƟ on ................................................................................................30
Outdoor Available Accessories ................................................................................................................30
Gas Conversion InstrucƟ ons ....................................................................................................................33
Water ConnecƟ ons ..................................................................................................................................33
RecirculaƟ on ...........................................................................................................................................34
CombinaƟ on Potable Water HeaƟ ng ......................................................................................................36
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