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Navien NHB-150 Service Manual

Navien NHB-150
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48 NHB Service Manual
Version 1.0
4.4.11 Special Parameter mode
You can modify parameter settings for boiler operations, in different operating conditions. Follow the instructions below to access the Special
Parameter mode and change the available settings.
CAUTION
Parameters must be set by a qualified professional with an extensive understanding of the boiler system. Setting parameters improperly
may lead to property damage or injury.
1. Press and hold the Diagnostic button for 5 seconds to enter the Special Parameter mode.
2. Press the + or – buttons at Special Parameter Mode. (refer to the table below)
3. Press the [MODE] Button once enters boiler to the currently displayed mode
4. Press the [RESET] button once returns the boiler to the Normal Operating Mode.
5. The boiler will automatically return to the Normal Operating Mode, if there is no input from the [+] or [–] button for 5 minutes.
Item Description Display
(1) Parameter Setting Mode Sets the Boiler parameters.
(2) Error Checking Mode Used to test the normal operation of each device.
(3) Operation condition Setting Mode Used to test the operation condition of the boiler.

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Navien NHB-150 Specifications

General IconGeneral
ModelNHB-150
CategoryBoiler
Maximum Input150, 000 BTU/h
AFUE95%
Vent TypeDirect Vent
Fuel TypeNatural Gas or Propane
Min. Input (NG)15, 000 BTU/h
Min. Input (LP)15, 000 BTU/h
Voltage120 V
Water Connection Size1 inch NPT
Gas Connection Size3/4 inch NPT
Vent Diameter3"

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