67Setting the DIP Switches
WARNING
●
Do not remove the front cover unless the power to the boiler is turned off or disconnected. Failure to
do so may result in electric shock.
●
Configure only the DIP switches that require adjustment according to the instructions in this manual. Do
not adjust any other DIP switches.
●
Ensure that the High Altitude setting reflects the actual location of the boiler. If not, it may cause personal
injury or malfunction of the boiler.
The boiler has 2 sets of DIP switches on the main circuit board (PCB). DIP switches are used to control the
functionality of the boiler. Set the DIP switches appropriately, based on the installation environment.
6.1 DIP Switch 1 (Set of 6 Switches)
The DIP SW1 (Set of 6 Switches) on the circuit board configures the operation status and model settings.
1 2 3 4 5 6
O
N
O
N
1 2 3 4 5 6 7 8
Switch Function Setting
1 & 2 Operation Status
Normal Operation 1-OFF, 2-OFF
2-stage MAX 1-ON, 2-OFF
1-stage MIN 1-OFF, 2-ON
1-stage MAX 1-ON, 2-ON
5 & 6 Model Setting
NHB-055H 5-OFF, 6-OFF
NHB-080H 5-ON, 6-OFF
NHB-110H 5-OFF, 6-ON
NHB-150H 5-ON, 6-ON
6. Setting the DIP Switches
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