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