4
Rinnai Tankless Water Heater Installation and Operation Manual
5.6 Diagnostic Codes ..................................................................................................................
72
5.7 Configuring Recirculation .....................................................................................................
75
6. Maintenance ..................................................................................................................................
81
6.1 Maintenance .........................................................................................................................
81
6.2 Cleaning and Inspecting the Air Filter (Indoor Units Only) ....................................................
83
6.3 Flushing the Heat Exchanger ...............................................................................................
85
6.4 Draining the Water Heater ....................................................................................................
86
7. Appendices ...................................................................................................................................
87
7.1 Massachusetts State Gas Regulations .................................................................................
87
7.2 Wiring Diagram .....................................................................................................................
89
7.3 Ladder Diagram ....................................................................................................................
90
7.4 Pressure Drop and Water Flow Curves ................................................................................
91
7.5 Pressure Drop Curve (Water Pump) ......................................................................
92
7.6 Guidelines for Additional Temperature Controllers ...............................................................
93
8. Warranty ........................................................................................................................................
94