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2. Installing the Device
This section provides information required to install the H
water heaters.
WARNING
Ensure that you have turned off the power to the water heater before installing
the device.
2.1 Basic Principles
The following diagram shows the basic operation of water heaters with the H
add-on controller.
System Diagram for NPE-A
8
Installing the Device
Air add-on controller in
2
Air
2
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