Important Safety Information ....................................................................... 2Contents......................................................................................................... 7Overview of Condensing Tankless Gas Water Heater .............................. 8Unit Components .......................................................................................... 9Display Window............................................................................................ 10Initial Operation ............................................................................................ 11How to Use (Not using the remote controller)Using the Water Heater ............................................................................. 12How to Use (Using the optional remote controller)Remote Controller ..................................................................................... 13Setting and Using the Water Heater ........................................................ 14Flow Meter Alarm ...................................................................................... 16Muting the Remote Controller.................................................................. 18Adjusting the Maximum Output Temperature ........................................ 18Preventing Damage from Freezing ............................................................. 19Regular Maintenance ................................................................................... 22Troubleshooting ........................................................................................... 25Follow-up Service ........................................................................................ 30Specifications ............................................................................................... 32Contents