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Rinnai Tankless Water Heater Installation and Operation Manual 4
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5.6 Diagnostic Codes .................................................................................................................. 73
6. Maintenance .................................................................................................................................. 76
6.1 Maintenance ......................................................................................................................... 76
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6.4 Draining the Water Heater .................................................................................................... 81
7. Appendices ................................................................................................................................... 82
7.1 Massachusetts State Gas Regulations ................................................................................. 82
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8. Warranty ........................................................................................................................................ 88
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