44 Installing the Water Heater
1 2 3 4 5 6 7 8 9 10
ON
[NPN-120E/160E/180E/199E]
3.7 Setting the DIP Switches
The water heater has two DIP switch locations: on
the main circuit board (PCB) and on the front panel.
Each location has two sets of DIP switches that
control the functionality of the water heater. Set the
DIP switches appropriately, based on the installation
environment.
3.7.1 Circuit Board DIP Switches
The two sets of DIP switches on the circuit board
configure the water heater’s model settings. These
configurations are set at the factory and should not
be changed.
3.7.2 Setting the Front Panel DIP
Switches
The two sets of DIP switches on the front panel
configure the water heater’s pump & recirculation,
display, well pump, storage tank & solar system, lime
alarm, high altitude, cascade venting and gas type
settings. Some of these configurations are set at the
factory and should not be changed. The following
tables describe the functions of the DIP switches
and their settings:
1 2 3 4 5 6 7 8 9 10
ON
ON
[NPN-160U/180U/199U]
