A.O. Smith THR-160 Installation Instructions And Use & Care Manual page 3

Dual Purpose Water Hea ng for the State of Massachuse s .................................................................37
X3® Technology .......................................................................................................................................38
Pressure Relief Valve ...............................................................................................................................38
Electrical Connec ons .............................................................................................................................40
Cascade System .......................................................................................................................................41
OPERATION ...................................................................................................43
FOR YOUR SAFETY, READ BEFORE OPERATING ........................................................................................ 43
Temperature Adjustment ........................................................................................................................46
Unit Conversion Mode .............................................................................................................................47
Confi gura on Mode (A Mode) ................................................................................................................48
Confi gura on Mode (C Mode) ................................................................................................................48
Se ng the Clock .....................................................................................................................................49
Se ng Recircula on Modes....................................................................................................................50
Se ng the Pump Timers .........................................................................................................................52
Pump Timer Ac va on ............................................................................................................................53
MAINTENANCE ..............................................................................................54
Regular Maintenance ..............................................................................................................................54
Unit Draining & Power Outage
(Freeze Protec on) .................................................................................................................................55
Condensate Drain ....................................................................................................................................55
TROUBLESHOOTING .....................................................................................56
General Troubleshoo ng .........................................................................................................................56
Error Codes ..............................................................................................................................................57
Fault Analysis of Error Codes ...................................................................................................................57
COMPONENT LIST ..........................................................................................63
FLOW RATE ....................................................................................................70
NOTES ...........................................................................................................71
TABLE OF CONTENTS
Residen al Gas Tankless Water Heater Use and Care Guide • 3