2 Contents
Contents
1. Safety Information
3
2. About the Water Heater
6
2.1 Description of the Water Heater
6
2.2 Parts of the Water Heater
6
2.3 The Front Panel
7
3. Operating the Water Heater
8
3.1 Turning the Water Heater On or Off
8
3.2 Adjusting the Water Temperature
8
3.3 Viewing Basic Information
9
3.4 Resetting the Water Heater
9
4. Maintaining the Water Heater
10
4.1 Cleaning the Water Heater
10
4.2 Draining the Water Heater
10
4.3 Flushing the Heat Exchanger
11
4.4 Cleaning the Inlet Water Filter and Recirculation Inlet Filter
12
4.5 Cleaning the Air Intake Filter
13
4.6 Protecting the Water Heater from Freezing
14
5.
Troubleshooting 15
5.1 Solving Basic Problems
15
5.2 Understanding Error Codes
16
Summary of Contents for NPE-150S
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