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Table of Contents
Explanation of Symbols ........................................................................................................................................................................................ 3
Important Safety Instructions .............................................................................................................................................................................. 3
Ensuring a Safe Operating Environment ........................................................................................................................................................................................................3
Responsibilities of the Operator ........................................................................................................................................................................................................................3
About Your Product ............................................................................................................................................................................................... 4
Product Overview .....................................................................................................................................................................................................................................................4
Product Features.......................................................................................................................................................................................................................................................4
Basic Function ............................................................................................................................................................................................................................................................4
Installation .............................................................................................................................................................................................................. 4
General Installation Safety ....................................................................................................................................................................................................................................4
What’s in the Box .......................................................................................................................................................................................................................................................5
Tools Required (Not Provided) ............................................................................................................................................................................................................................ 5
Prepare Cutout Opening........................................................................................................................................................................................................................................6
Prepare Utilities ..........................................................................................................................................................................................................................................................7
Prepare Wall Control ................................................................................................................................................................................................................................................8
Prepare Water Heater Door ..................................................................................................................................................................................................................................8
Prepare Water Heater .............................................................................................................................................................................................................................................9
Leak Check ............................................................................................................................................................................................................................................................... 12
Functional Test ......................................................................................................................................................................................................................................................... 12
Operation................................................................................................................................................................................................................12
Controller Operation ..............................................................................................................................................................................................................................................12
Safe Operation .........................................................................................................................................................................................................................................................13
Water Control Valve ...............................................................................................................................................................................................................................................13
High Altitude Use ...................................................................................................................................................................................................................................................13
Antifreeze Function
(for FWH09AFA and FWH09AFA-AM models only) ............................................................................................................ 13
Cleaning and Maintenance ..................................................................................................................................................................................14
Storage and Transit ................................................................................................................................................................................................................................................ 14
Winterizing Water Heater ....................................................................................................................................................................................................................................14
Routine Inspection .................................................................................................................................................................................................................................................14
Filter Cleaning ..........................................................................................................................................................................................................................................................15
Pressure Safety Valve Maintenance...............................................................................................................................................................................................................15
Hard Water and Decalcification .......................................................................................................................................................................................................................16
Error Code ..............................................................................................................................................................................................................16
Troubleshooting ....................................................................................................................................................................................................17
Wiring Diagram ......................................................................................................................................................................................................18
Specifications........................................................................................................................................................................................................18
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