Navien NHB-150 Service Manual

NHB Service Manual 19
Version 1.0
Set of PCB DIP Switch 1 (6 switch unit)
The DIP SW 1 on the circuit board configures the operation status
and model / capacity settings.
OFF
ON
Ex) DIP Switch On / Off
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
4.1 Setting the DIP Switches
CAUTION
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.
The boiler has 2 sets of DIP switches on the main circuit board
(PCB) and 2 sets of DIP switches on the front panel. DIP switches
are used to control the functionality of the boiler. Set the DIP
switches appropriately, based on the installation environment.
4.1.1 PCB DIP Switches
1 2 3 4 5 6
ON
1 2 3 4 5 6 7 8
ON
4. System Details

Navien NHB-150 Specifications

General

Model	NHB-150
Category	Boiler
Maximum Input	150, 000 BTU/h
AFUE	95%
Vent Type	Direct Vent
Fuel Type	Natural Gas or Propane
Min. Input (NG)	15, 000 BTU/h
Min. Input (LP)	15, 000 BTU/h
Voltage	120 V
Water Connection Size	1 inch NPT
Gas Connection Size	3/4 inch NPT
Vent Diameter	3"